CA2735016A1 - Laminar dressings and systems for applying reduced pressure at a tissue site - Google Patents
Laminar dressings and systems for applying reduced pressure at a tissue site Download PDFInfo
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- CA2735016A1 CA2735016A1 CA2735016A CA2735016A CA2735016A1 CA 2735016 A1 CA2735016 A1 CA 2735016A1 CA 2735016 A CA2735016 A CA 2735016A CA 2735016 A CA2735016 A CA 2735016A CA 2735016 A1 CA2735016 A1 CA 2735016A1
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- channel walls
- channels
- tissue site
- dressing
- reduced pressure
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Classifications
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- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
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- A61F13/0203—Adhesive plasters or dressings having a fluid handling member
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Abstract
A system for applying a reduced pressure at a tissue site includes a reduced pressure source, a porous pad in fluid communication with the reduced pressure source, and a drape positionable over the porous pad to seal the porous pad at the tissue site. The porous pad includes a plurality of channel walls to form a plurality of channels between the channel walls. The channel walls are substantially liquid impermeable to prevent movement of a liquid through the channel walls but are gas permeable to allow movement of a gas through the channel walls as reduced pressure is applied at the tissue site. The liquid impermeability of the channel walls and the application of reduced pressure causes flow of the liquid to occur through the plurality of channels.
Description
TITLE OF THE INVENTION
LAMINAR DRESSINGS, SYSTEMS, AND METHODS FOR
APPLYING REDUCED PRESSURE AT A TISSUE SITE
CROSS-REFERENCE TO RELATED APPLICATIONS
[00011 This application claims the benefit of U.S. Provisional Application No.
61/098,000, filed September 18, 2008, and U.S. Provisional Application No.
61/098,015, filed September 18, 2008. Both of these applications are hereby incorporated by reference.
BACKGROUND
[00021 Clinical studies and practice have shown that providing a reduced pressure in proximity to a tissue site augments and accelerates the growth of new tissue at the tissue site.
The applications of this phenomenon are numerous, but one particular application of reduced pressure involves treating wounds. This treatment (frequently referred to in the medical community as "negative pressure wound therapy," "reduced pressure therapy," or "vacuum therapy") provides a number of benefits, including migration of epithelial and subcutaneous tissues, improved blood flow, and micro-deformation of tissue at the wound site. Together these benefits result in increased development of granulation tissue and faster healing times.
Typically, reduced pressure is applied by a reduced pressure source to tissue through a porous pad or other manifold device. In many instances, wound exudate and other liquids from the tissue site are collected within a canister to prevent the liquids from reaching the reduced pressure source.
BRIEF SUMMARY
[0003] The problems presented by existing reduced pressure systems and reduced pressure dressings are solved by the systems and methods of the illustrative embodiments described herein. In one illustrative embodiment, a system for applying a reduced pressure at a tissue site is provided. The system includes a reduced pressure source operable to supply reduced pressure and a porous pad in fluid communication with the reduced pressure source.
The porous pad includes a plurality of channel walls to form a plurality of channels between the channel walls, and the channel walls are gas permeable to allow movement of a gas through the channel walls as reduced pressure is applied at the tissue site. The channel walls are substantially liquid impermeable to prevent movement of a liquid through the channel walls.
The liquid impermeability of the channel walls and the application of reduced pressure causes flow of the liquid to occur through the plurality of channels. The system further includes a drape positionable over the porous pad to seal the porous pad at the tissue site such that reduced pressure can be maintained at the tissue site.
[0004] In another embodiment, a system for applying a reduced pressure at a tissue site includes a reduced pressure source operable to supply reduced pressure and a laminar layer in fluid communication with the reduced pressure source. A sealing member covers at least a portion of the laminar layer. The laminar layer includes a plurality of channel walls that form a plurality of channels through which liquid is drawn. The laminar layer is operable to transfer reduced pressure to the tissue site through the plurality of channel walls.
[0005] In still another embodiment, a system for applying a reduced pressure at a tissue site includes a reduced pressure source operable to supply reduced pressure and a laminar layer in fluid communication with the reduced pressure source. A drape is positionable over the laminar layer to seal the laminar layer at the tissue site such that reduced pressure can be maintained at the tissue site. The laminar layer includes a plurality of channel walls to form a plurality of channels between the channel walls. The channel walls are substantially liquid impermeable and gas permeable. The channel walls are parallel to one another and form an angle of between about 20 degrees and about 90 degrees with a skin surface adjacent the tissue site.
[0006] In yet another embodiment, a dressing for applying a reduced pressure at a tissue site includes a laminar layer having a plurality of channel walls that form a plurality of channels through which liquid is drawn. The laminar layer is operable to transfer reduced pressure to the
LAMINAR DRESSINGS, SYSTEMS, AND METHODS FOR
APPLYING REDUCED PRESSURE AT A TISSUE SITE
CROSS-REFERENCE TO RELATED APPLICATIONS
[00011 This application claims the benefit of U.S. Provisional Application No.
61/098,000, filed September 18, 2008, and U.S. Provisional Application No.
61/098,015, filed September 18, 2008. Both of these applications are hereby incorporated by reference.
BACKGROUND
[00021 Clinical studies and practice have shown that providing a reduced pressure in proximity to a tissue site augments and accelerates the growth of new tissue at the tissue site.
The applications of this phenomenon are numerous, but one particular application of reduced pressure involves treating wounds. This treatment (frequently referred to in the medical community as "negative pressure wound therapy," "reduced pressure therapy," or "vacuum therapy") provides a number of benefits, including migration of epithelial and subcutaneous tissues, improved blood flow, and micro-deformation of tissue at the wound site. Together these benefits result in increased development of granulation tissue and faster healing times.
Typically, reduced pressure is applied by a reduced pressure source to tissue through a porous pad or other manifold device. In many instances, wound exudate and other liquids from the tissue site are collected within a canister to prevent the liquids from reaching the reduced pressure source.
BRIEF SUMMARY
[0003] The problems presented by existing reduced pressure systems and reduced pressure dressings are solved by the systems and methods of the illustrative embodiments described herein. In one illustrative embodiment, a system for applying a reduced pressure at a tissue site is provided. The system includes a reduced pressure source operable to supply reduced pressure and a porous pad in fluid communication with the reduced pressure source.
The porous pad includes a plurality of channel walls to form a plurality of channels between the channel walls, and the channel walls are gas permeable to allow movement of a gas through the channel walls as reduced pressure is applied at the tissue site. The channel walls are substantially liquid impermeable to prevent movement of a liquid through the channel walls.
The liquid impermeability of the channel walls and the application of reduced pressure causes flow of the liquid to occur through the plurality of channels. The system further includes a drape positionable over the porous pad to seal the porous pad at the tissue site such that reduced pressure can be maintained at the tissue site.
[0004] In another embodiment, a system for applying a reduced pressure at a tissue site includes a reduced pressure source operable to supply reduced pressure and a laminar layer in fluid communication with the reduced pressure source. A sealing member covers at least a portion of the laminar layer. The laminar layer includes a plurality of channel walls that form a plurality of channels through which liquid is drawn. The laminar layer is operable to transfer reduced pressure to the tissue site through the plurality of channel walls.
[0005] In still another embodiment, a system for applying a reduced pressure at a tissue site includes a reduced pressure source operable to supply reduced pressure and a laminar layer in fluid communication with the reduced pressure source. A drape is positionable over the laminar layer to seal the laminar layer at the tissue site such that reduced pressure can be maintained at the tissue site. The laminar layer includes a plurality of channel walls to form a plurality of channels between the channel walls. The channel walls are substantially liquid impermeable and gas permeable. The channel walls are parallel to one another and form an angle of between about 20 degrees and about 90 degrees with a skin surface adjacent the tissue site.
[0006] In yet another embodiment, a dressing for applying a reduced pressure at a tissue site includes a laminar layer having a plurality of channel walls that form a plurality of channels through which liquid is drawn. The laminar layer is operable to transfer reduced pressure to the
2
3 PCT/US2009/057182 tissue site through the plurality of channel walls. A sealing member covers at least a portion of the laminar layer to provide a seal over the tissue site.
[0007] In another embodiment, a dressing for applying a reduced pressure at a tissue site includes a porous pad having a plurality of channel walls to form a plurality of channels between the channel walls. The channel walls are gas permeable to allow movement of a gas through the channel walls as reduced pressure is applied at the tissue site.
The channel walls are substantially liquid impermeable to prevent movement of liquid through the channel walls. The liquid impermeability of the channel walls and the application of reduced pressure causes flow of the liquid to occur through the plurality of channels. A drape is positionable over the porous pad to seal the porous pad at the tissue site such that reduced pressure can be maintained at the tissue site.
[0008] In still another embodiment, a dressing for applying a reduced pressure at a tissue site includes a laminar layer having a plurality of channel walls to form a plurality of channels between the channel walls. The channel walls are substantially liquid impermeable and gas permeable. The channel walls are parallel to one another and form an angle of between about 20 degrees and about 90 degrees with a skin surface adjacent the tissue site. A drape is positionable over the laminar layer to seal the laminar layer at the tissue site such that reduced pressure can be maintained at the tissue site.
[0009] In another embodiment, a method for protecting tissue adjacent a tissue site during application of reduced pressure treatment to the tissue site is provided. The method includes applying a dressing having substantially liquid impermeable and gas permeable channel walls to the tissue site. A gas is moved away from the tissue site through the channel walls, and a liquid is moved away from the tissue site between the channel walls.
[0010] In yet another embodiment, a method for applying a reduced pressure at a tissue site includes applying a laminar layer to the tissue site. The laminar layer includes a plurality of channel walls that form a plurality of channels through which liquid is capable of being drawn.
The laminar layer is capable of transferring reduced pressure to the tissue site through the plurality of channel walls when placed under reduced pressure. The method further includes covering at least a portion of the laminar layer with a sealing member to provide a seal over the tissue site. A reduced pressure is applied to the laminar layer.
[0011] In another embodiment, a method of manufacturing a dressing for applying a reduced pressure at a tissue site is provided. The method includes forming a laminar layer having a plurality of channel walls that form a plurality of channels through which liquid is capable of being drawn. The laminar layer is operable to transfer reduced pressure to the tissue site through the plurality of channel walls.
[0012] Other features and advantages of the illustrative embodiments will become apparent with reference to the drawings and detailed description that follow.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] FIG. 1 illustrates a schematic diagram, with a portion in cross section, of an illustrative system for applying reduced pressure at a tissue site;
[0014] FIG. 2 illustrates a schematic, perspective view of an illustrative laminar layer for use in or as a dressing;
[0015] FIG. 3 illustrates a schematic, cross-sectional view of the illustrative laminar layer of FIG. 2; and [0016] FIG. 4 illustrates a schematic, perspective view of an illustrative laminar layer for use in or as a dressing;
[0017] FIG. 5 illustrates a schematic cross-sectional view of an illustrative system for applying reduced pressure at a tissue site; and [0018] FIG. 6 illustrates a schematic cross-sectional view of an illustrative system for applying reduced pressure at a tissue site.
DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS
[0019] In the following detailed description of several illustrative embodiments, reference is made to the accompanying drawings that form a part hereof, and in which is shown by way of illustration specific preferred embodiments in which the invention may be practiced.
These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, and it is understood that other embodiments may be utilized and that logical structural, mechanical, electrical, and chemical changes may be made without departing from the spirit or scope of the invention. To avoid detail not necessary to enable those skilled in the art to practice the embodiments described herein, the description may omit certain information known to those skilled in the art. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the illustrative embodiments are defined only by the appended claims.
[0007] In another embodiment, a dressing for applying a reduced pressure at a tissue site includes a porous pad having a plurality of channel walls to form a plurality of channels between the channel walls. The channel walls are gas permeable to allow movement of a gas through the channel walls as reduced pressure is applied at the tissue site.
The channel walls are substantially liquid impermeable to prevent movement of liquid through the channel walls. The liquid impermeability of the channel walls and the application of reduced pressure causes flow of the liquid to occur through the plurality of channels. A drape is positionable over the porous pad to seal the porous pad at the tissue site such that reduced pressure can be maintained at the tissue site.
[0008] In still another embodiment, a dressing for applying a reduced pressure at a tissue site includes a laminar layer having a plurality of channel walls to form a plurality of channels between the channel walls. The channel walls are substantially liquid impermeable and gas permeable. The channel walls are parallel to one another and form an angle of between about 20 degrees and about 90 degrees with a skin surface adjacent the tissue site. A drape is positionable over the laminar layer to seal the laminar layer at the tissue site such that reduced pressure can be maintained at the tissue site.
[0009] In another embodiment, a method for protecting tissue adjacent a tissue site during application of reduced pressure treatment to the tissue site is provided. The method includes applying a dressing having substantially liquid impermeable and gas permeable channel walls to the tissue site. A gas is moved away from the tissue site through the channel walls, and a liquid is moved away from the tissue site between the channel walls.
[0010] In yet another embodiment, a method for applying a reduced pressure at a tissue site includes applying a laminar layer to the tissue site. The laminar layer includes a plurality of channel walls that form a plurality of channels through which liquid is capable of being drawn.
The laminar layer is capable of transferring reduced pressure to the tissue site through the plurality of channel walls when placed under reduced pressure. The method further includes covering at least a portion of the laminar layer with a sealing member to provide a seal over the tissue site. A reduced pressure is applied to the laminar layer.
[0011] In another embodiment, a method of manufacturing a dressing for applying a reduced pressure at a tissue site is provided. The method includes forming a laminar layer having a plurality of channel walls that form a plurality of channels through which liquid is capable of being drawn. The laminar layer is operable to transfer reduced pressure to the tissue site through the plurality of channel walls.
[0012] Other features and advantages of the illustrative embodiments will become apparent with reference to the drawings and detailed description that follow.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] FIG. 1 illustrates a schematic diagram, with a portion in cross section, of an illustrative system for applying reduced pressure at a tissue site;
[0014] FIG. 2 illustrates a schematic, perspective view of an illustrative laminar layer for use in or as a dressing;
[0015] FIG. 3 illustrates a schematic, cross-sectional view of the illustrative laminar layer of FIG. 2; and [0016] FIG. 4 illustrates a schematic, perspective view of an illustrative laminar layer for use in or as a dressing;
[0017] FIG. 5 illustrates a schematic cross-sectional view of an illustrative system for applying reduced pressure at a tissue site; and [0018] FIG. 6 illustrates a schematic cross-sectional view of an illustrative system for applying reduced pressure at a tissue site.
DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS
[0019] In the following detailed description of several illustrative embodiments, reference is made to the accompanying drawings that form a part hereof, and in which is shown by way of illustration specific preferred embodiments in which the invention may be practiced.
These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, and it is understood that other embodiments may be utilized and that logical structural, mechanical, electrical, and chemical changes may be made without departing from the spirit or scope of the invention. To avoid detail not necessary to enable those skilled in the art to practice the embodiments described herein, the description may omit certain information known to those skilled in the art. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the illustrative embodiments are defined only by the appended claims.
4 [0020] Referring now primarily to FIG. 1, an illustrative reduced pressure treatment system 100, which includes a laminar dressing 102, or laminar layer, and which applies reduced pressure to a tissue site 104, is presented. The laminar dressing 102 may further include a sealing member 108 and a reduced-pressure connector 110, or connection member.
The laminar dressing 102 may help reduce or avoid maceration of tissue adjacent tissue site 104 such as epidermis 118.
[0021] The laminar dressing 102 serves as a manifold for distributing reduced pressure.
The term "manifold" as used herein generally refers to a substance or structure that is provided to assist in applying reduced pressure to, delivering fluids to, or removing fluids from a tissue site. The manifold typically includes a plurality of flow channels or pathways to improve distribution of fluids provided to and removed from the tissue site. The laminar dressing 102 that serves as a manifold may include a number of layers as will be described further below.
[0022] The tissue site 104 may be the bodily tissue of any human, animal, or other organism, including bone tissue, adipose tissue, muscle tissue, neural tissue, dermal tissue, vascular tissue, connective tissue, cartilage, tendons, ligaments, or any other tissue. While the tissue site 104 may include a wound, diseased tissue, or defective tissue, the tissue site 104 may also be healthy tissue that is not wounded, diseased, or defective.
[0023] The application of reduced pressure to the tissue site 104 may be used to promote the drainage of exudate and other liquids from the tissue site 104, as well as to stimulate the growth of additional tissue. In the case in which the tissue site 104 is a wound site, the growth of granulation tissue and removal of exudates and bacteria promotes healing of the wound. The application of reduced pressure to non-wounded or non-defective tissue, including healthy tissue, may be used to promote the growth of tissue that may be harvested and transplanted to another tissue location.
[0024] As used herein, "reduced pressure" generally refers to a pressure less than the ambient pressure at a tissue site that is being subjected to treatment. In most cases, this reduced pressure will be less than the atmospheric pressure at which the patient is located.
Alternatively, the reduced pressure may be less than a hydrostatic pressure associated with tissue at the tissue site. The reduced pressure delivered may be static or varied (patterned or random) and may be delivered continuously or intermittently. Although the terms "vacuum"
and "negative pressure" may be used to describe the pressure applied to the tissue site, the actual pressure reduction applied to the tissue site may be significantly less than the pressure reduction normally associated with a complete vacuum. Reduced pressure may initially
The laminar dressing 102 may help reduce or avoid maceration of tissue adjacent tissue site 104 such as epidermis 118.
[0021] The laminar dressing 102 serves as a manifold for distributing reduced pressure.
The term "manifold" as used herein generally refers to a substance or structure that is provided to assist in applying reduced pressure to, delivering fluids to, or removing fluids from a tissue site. The manifold typically includes a plurality of flow channels or pathways to improve distribution of fluids provided to and removed from the tissue site. The laminar dressing 102 that serves as a manifold may include a number of layers as will be described further below.
[0022] The tissue site 104 may be the bodily tissue of any human, animal, or other organism, including bone tissue, adipose tissue, muscle tissue, neural tissue, dermal tissue, vascular tissue, connective tissue, cartilage, tendons, ligaments, or any other tissue. While the tissue site 104 may include a wound, diseased tissue, or defective tissue, the tissue site 104 may also be healthy tissue that is not wounded, diseased, or defective.
[0023] The application of reduced pressure to the tissue site 104 may be used to promote the drainage of exudate and other liquids from the tissue site 104, as well as to stimulate the growth of additional tissue. In the case in which the tissue site 104 is a wound site, the growth of granulation tissue and removal of exudates and bacteria promotes healing of the wound. The application of reduced pressure to non-wounded or non-defective tissue, including healthy tissue, may be used to promote the growth of tissue that may be harvested and transplanted to another tissue location.
[0024] As used herein, "reduced pressure" generally refers to a pressure less than the ambient pressure at a tissue site that is being subjected to treatment. In most cases, this reduced pressure will be less than the atmospheric pressure at which the patient is located.
Alternatively, the reduced pressure may be less than a hydrostatic pressure associated with tissue at the tissue site. The reduced pressure delivered may be static or varied (patterned or random) and may be delivered continuously or intermittently. Although the terms "vacuum"
and "negative pressure" may be used to describe the pressure applied to the tissue site, the actual pressure reduction applied to the tissue site may be significantly less than the pressure reduction normally associated with a complete vacuum. Reduced pressure may initially
5 generate fluid flow in the area of the tissue site. As the hydrostatic pressure around the tissue site approaches the desired reduced pressure, the flow may subside, and the reduced pressure is then maintained. Unless otherwise indicated, values of pressure stated herein are gauge pressures. Consistent with the use herein, increases in reduced pressure or vacuum pressure typically refer to a relative reduction in absolute pressure, while decreases in reduced pressure typically refer to an increase in absolute pressure.
[0025] Unless otherwise indicated, as used herein, "or" does not require mutual exclusivity.
[0026] The reduced pressure is provided to the reduced-pressure connector 110 by a reduced-pressure delivery conduit 112. The reduced-pressure delivery conduit 112 receives reduced pressure from a reduced-pressure source 114. The reduced-pressure source 114 may be any device or subsystem for supplying reduced pressure, including but not limited to a manually operated pump, a powered vacuum pump, a wall vacuum source, or any other device or system capable of supplying a reduced pressure. While the amount and nature of reduced pressure applied to a site will typically vary according to the application, the reduced pressure will typically be between about -5 mm Hg and about -500 mm Hg and more typically between about -100 mm Hg and about -200 mm Hg. In one illustrative embodiment, the reduced pressure source 114 may be a battery-driven vacuum pump. In this example, the pump may use low amounts of power and be capable of operating for an extended period of time on a single charge of the battery.
[0027] One or more devices may be fluidly coupled between the reduced-pressure connector 110 and the reduced-pressure source 114. For example, representative device 116 is shown fluidly coupled on a portion of the reduced-pressure delivery conduit 112. The representative device 116 may be a fluid reservoir, or collection member, to hold exudates and other fluids removed. Other illustrative, non-limiting examples of devices 116 that may be included on the reduced-pressure delivery conduit 112 or otherwise fluidly coupled to the reduced-pressure delivery conduit 112 include, without limitation, a pressure sensing or feedback device, a volume detection system, a blood detection system, an infection detection system, a flow monitoring system, or a temperature monitoring system. Some of these devices may be integrally associated with the reduced-pressure source 114 or other aspects of the system 100.
[0028] The laminar dressing 102 is adapted to contact or cover the tissue site 104 that is to be treated. As used herein, the term "cover" includes partially or fully covering. Also, a first
[0025] Unless otherwise indicated, as used herein, "or" does not require mutual exclusivity.
[0026] The reduced pressure is provided to the reduced-pressure connector 110 by a reduced-pressure delivery conduit 112. The reduced-pressure delivery conduit 112 receives reduced pressure from a reduced-pressure source 114. The reduced-pressure source 114 may be any device or subsystem for supplying reduced pressure, including but not limited to a manually operated pump, a powered vacuum pump, a wall vacuum source, or any other device or system capable of supplying a reduced pressure. While the amount and nature of reduced pressure applied to a site will typically vary according to the application, the reduced pressure will typically be between about -5 mm Hg and about -500 mm Hg and more typically between about -100 mm Hg and about -200 mm Hg. In one illustrative embodiment, the reduced pressure source 114 may be a battery-driven vacuum pump. In this example, the pump may use low amounts of power and be capable of operating for an extended period of time on a single charge of the battery.
[0027] One or more devices may be fluidly coupled between the reduced-pressure connector 110 and the reduced-pressure source 114. For example, representative device 116 is shown fluidly coupled on a portion of the reduced-pressure delivery conduit 112. The representative device 116 may be a fluid reservoir, or collection member, to hold exudates and other fluids removed. Other illustrative, non-limiting examples of devices 116 that may be included on the reduced-pressure delivery conduit 112 or otherwise fluidly coupled to the reduced-pressure delivery conduit 112 include, without limitation, a pressure sensing or feedback device, a volume detection system, a blood detection system, an infection detection system, a flow monitoring system, or a temperature monitoring system. Some of these devices may be integrally associated with the reduced-pressure source 114 or other aspects of the system 100.
[0028] The laminar dressing 102 is adapted to contact or cover the tissue site 104 that is to be treated. As used herein, the term "cover" includes partially or fully covering. Also, a first
6 object that covers a second object may directly or indirectly touch the second object, or may not touch the second object at all.
[0029] The laminar dressing 102 is covered fully or partially by the sealing member 108. The sealing member 108 may be any material that provides a fluid seal over the laminar dressing 102 and a portion of a patient's epidermis 118 or the tissue surrounding the tissue site 104. The sealing member 108 may, for example, be an impermeable or semi-permeable, elastomeric material. "Elastomeric" means having the properties of an elastomer. Generally, an elastomer is a polymeric material that has rubber-like properties. More specifically, most elastomers have elongation rates greater than 100% and a significant amount of resilience. The resilience of a material refers to the material's ability to recover from an elastic deformation.
Examples of elastomers, which may be used in a sealing member, include, but are not limited to, natural rubbers, polyisoprene, styrene butadiene rubber, chloroprene rubber, polybutadiene, nitrile rubber, butyl rubber, ethylene propylene rubber, ethylene propylene diene monomer, chlorosulfonated polyethylene, polysulfide rubber, polyurethane, EVA film, co-polyester, and silicones. In an illustrative embodiment, the sealing member 108 may be a drape such as those drapes used with surgical and other medical procedures. Specific examples of drapes may include a silicone drape, a 3M Tegaderm drape, an acrylic drape such as one available from Avery Dennison, or any other drape or cover.
[0030] The sealing member 108 may be provided in "sheet" form, or in a pourable or sprayable form that is applied over the laminar dressing 102 after placement of the laminar dressing 102 adjacent or in contact with the tissue site 104. Similarly, the sealing member 108 may include a device that is placed over the laminar dressing 102 and the tissue site 104 to provide sealing functionality, including but not limited to, a suction cup, a molded cast, or a bell jar. The sealing member 108 has a first side 120 and a second, tissue-facing side 122.
[0031] An attachment device 124 may be used to hold the sealing member 108 against the patient's epidermis 118 or another layer, such as a gasket or additional sealing member. The attachment device 124 may take numerous forms. For example, the attachment device 124 may be a medically acceptable, pressure-sensitive adhesive 126 that extends about a periphery, or perimeter, 128 of the sealing member 108.
[0032] In one embodiment, the sealing member 108 is configured to provide a sealed connection with the epidermis 118 or the tissue surrounding the laminar dressing 102 and the tissue site 104. The sealed connection may be provided by the adhesive 126 positioned along the perimeter 128 of the sealing member 108, or on any portion of the sealing member 108, to
[0029] The laminar dressing 102 is covered fully or partially by the sealing member 108. The sealing member 108 may be any material that provides a fluid seal over the laminar dressing 102 and a portion of a patient's epidermis 118 or the tissue surrounding the tissue site 104. The sealing member 108 may, for example, be an impermeable or semi-permeable, elastomeric material. "Elastomeric" means having the properties of an elastomer. Generally, an elastomer is a polymeric material that has rubber-like properties. More specifically, most elastomers have elongation rates greater than 100% and a significant amount of resilience. The resilience of a material refers to the material's ability to recover from an elastic deformation.
Examples of elastomers, which may be used in a sealing member, include, but are not limited to, natural rubbers, polyisoprene, styrene butadiene rubber, chloroprene rubber, polybutadiene, nitrile rubber, butyl rubber, ethylene propylene rubber, ethylene propylene diene monomer, chlorosulfonated polyethylene, polysulfide rubber, polyurethane, EVA film, co-polyester, and silicones. In an illustrative embodiment, the sealing member 108 may be a drape such as those drapes used with surgical and other medical procedures. Specific examples of drapes may include a silicone drape, a 3M Tegaderm drape, an acrylic drape such as one available from Avery Dennison, or any other drape or cover.
[0030] The sealing member 108 may be provided in "sheet" form, or in a pourable or sprayable form that is applied over the laminar dressing 102 after placement of the laminar dressing 102 adjacent or in contact with the tissue site 104. Similarly, the sealing member 108 may include a device that is placed over the laminar dressing 102 and the tissue site 104 to provide sealing functionality, including but not limited to, a suction cup, a molded cast, or a bell jar. The sealing member 108 has a first side 120 and a second, tissue-facing side 122.
[0031] An attachment device 124 may be used to hold the sealing member 108 against the patient's epidermis 118 or another layer, such as a gasket or additional sealing member. The attachment device 124 may take numerous forms. For example, the attachment device 124 may be a medically acceptable, pressure-sensitive adhesive 126 that extends about a periphery, or perimeter, 128 of the sealing member 108.
[0032] In one embodiment, the sealing member 108 is configured to provide a sealed connection with the epidermis 118 or the tissue surrounding the laminar dressing 102 and the tissue site 104. The sealed connection may be provided by the adhesive 126 positioned along the perimeter 128 of the sealing member 108, or on any portion of the sealing member 108, to
7 secure the sealing member 108 to the laminar dressing 102 or the tissue surrounding the tissue site 104. The adhesive 126 may be pre-positioned on the sealing member 108 or may be sprayed or otherwise applied to the sealing member 108 immediately prior to installing the sealing member 108. Prior to the application of the sealing member 108 to the tissue site 104, the adhesive 126 may also be covered by an adhesive support layer or removable backing. The adhesive support layer may provide rigidity to the sealing member 108 prior to application and may also aid in the actual application of the sealing member 108 onto the tissue site 104 or tissue near the tissue site 104. The adhesive support layer may be peeled off or otherwise removed before applying.
[0033] The reduced-pressure connector 110 allows fluid communication between the reduced-pressure source 114 and an interior space 130 formed between the second, tissue-facing side 122 of the sealing member 108 and the tissue site 104. In one embodiment, the reduced-pressure connector 110 may pass through an aperture 111 in the sealing member 108 or be otherwise coupled to the sealing member 108. In another embodiment, the reduced-pressure delivery conduit 112 may directly couple the reduced-pressure source 114 to the laminar dressing 102.
[0034] The reduced-pressure delivery conduit 112 may be any tube, conduit, or flow path through which a gas, liquid, gel, or other fluid may flow. The possible embodiments of the reduced-pressure delivery conduit 112 are numerous, and non-limiting examples follow. The reduced-pressure delivery conduit 112 may have any cross-sectional shape, such as a circle, oval, polygon, or any other shape. In addition, the reduced-pressure delivery conduit 112 may be made from any material, and may be either flexible or inflexible. In FIG.
1, the reduced-pressure connector 110 couples reduced-pressure delivery conduit 112 to the representative device 116, and the reduced-pressure source 114. However, reduced-pressure delivery conduit 112 may instead directly couple reduced pressure source 114 to the laminar dressing 102. Also, the reduced-pressure delivery conduit 112 may include one or more paths or lumens through which fluid may flow. For example, the reduced-pressure delivery conduit 112 may include two lumens with one lumen being used to monitor pressure to determine the amount of reduced pressure being applied at the tissue site 104. The other lumen may be used to deliver fluids, such as air, antibacterial agents, antiviral agents, cell-growth promotion agents, irrigation fluids, or other chemically active agents, to the tissue site 104. A fluid source from which these fluids may originate is not shown in FIG. 1.
[0033] The reduced-pressure connector 110 allows fluid communication between the reduced-pressure source 114 and an interior space 130 formed between the second, tissue-facing side 122 of the sealing member 108 and the tissue site 104. In one embodiment, the reduced-pressure connector 110 may pass through an aperture 111 in the sealing member 108 or be otherwise coupled to the sealing member 108. In another embodiment, the reduced-pressure delivery conduit 112 may directly couple the reduced-pressure source 114 to the laminar dressing 102.
[0034] The reduced-pressure delivery conduit 112 may be any tube, conduit, or flow path through which a gas, liquid, gel, or other fluid may flow. The possible embodiments of the reduced-pressure delivery conduit 112 are numerous, and non-limiting examples follow. The reduced-pressure delivery conduit 112 may have any cross-sectional shape, such as a circle, oval, polygon, or any other shape. In addition, the reduced-pressure delivery conduit 112 may be made from any material, and may be either flexible or inflexible. In FIG.
1, the reduced-pressure connector 110 couples reduced-pressure delivery conduit 112 to the representative device 116, and the reduced-pressure source 114. However, reduced-pressure delivery conduit 112 may instead directly couple reduced pressure source 114 to the laminar dressing 102. Also, the reduced-pressure delivery conduit 112 may include one or more paths or lumens through which fluid may flow. For example, the reduced-pressure delivery conduit 112 may include two lumens with one lumen being used to monitor pressure to determine the amount of reduced pressure being applied at the tissue site 104. The other lumen may be used to deliver fluids, such as air, antibacterial agents, antiviral agents, cell-growth promotion agents, irrigation fluids, or other chemically active agents, to the tissue site 104. A fluid source from which these fluids may originate is not shown in FIG. 1.
8 [0035] The reduced-pressure connector 110 permits the passage of a fluid (such as exudates, air, etc.) from the laminar dressing 102 to reduced-pressure delivery conduit 112, and vice versa. In another illustrative embodiment (not shown), the reduced pressure treatment system 100 does not include the reduced-pressure connector 110. In this illustrative embodiment, the reduced-pressure delivery conduit 112 may be inserted directly into the sealing member 108 or the laminar dressing 102 such that an end of the reduced-pressure delivery conduit 112 is adjacent to or in contact with the sealing member 108 or any of the laminar dressing 102 in a manner that allows for the delivery of reduced pressure.
[0036] The reduced-pressure connector 110 may be located anywhere relative to the laminar dressing 102. For example, although FIG. 1 shows the reduced-pressure connector 110 and the opening or aperture 111 in the sealing member 108 through which the reduced-pressure connector 110 extends as being centrally located relative to the laminar dressing 102, the reduced-pressure connector 110 and the opening or aperture 111 may be located adjacent to the edges of the laminar dressing 102. Although not preferred, the reduced-pressure connector 110 or reduced-pressure delivery conduit 112 may instead be inserted beneath the sealing member 108 at periphery 128.
[0037] In operation, the laminar dressing 102 is deployed on the tissue site 104 and reduced pressure is delivered to the tissue site 104. More specifically, the laminar dressing 102 is deployed proximate the tissue site 104 where treatment is desired. The sealing member 108 is positioned over the laminar dressing 102 and at least a portion of the patient's epidermis 118 to form the sealed space 130. If not already provided in the sealing member 108, the aperture 111 may be formed in the sealing member 108 and the reduced-pressure connector 110 applied. The reduced-pressure delivery conduit 112 is fluidly coupled to the reduced-pressure connector 110 and to the reduced-pressure source 114. The reduced-pressure source 114 is activated and reduced pressure is delivered to the tissue site 104.
[0038] Referring now primarily to FIGS. 2 and 3, an illustrative laminar layer 200 is presented that may be included in a dressing or may be used as a dressing. In one illustrative example, the laminar layer 200 is the only layer in a dressing.
[0039] The laminar layer 200 has a first side 202 and a second, tissue-facing side 204.
The laminar layer 200 includes a plurality of channel walls 206 that form a plurality of channels 208. In the illustrative example of FIG. 2, the channel walls 206 are substantially parallel to one another and extend longitudinally in one direction parallel to an axis indicated by an arrow 210.
However, in other embodiments, the channel walls 206 may extend along any number of
[0036] The reduced-pressure connector 110 may be located anywhere relative to the laminar dressing 102. For example, although FIG. 1 shows the reduced-pressure connector 110 and the opening or aperture 111 in the sealing member 108 through which the reduced-pressure connector 110 extends as being centrally located relative to the laminar dressing 102, the reduced-pressure connector 110 and the opening or aperture 111 may be located adjacent to the edges of the laminar dressing 102. Although not preferred, the reduced-pressure connector 110 or reduced-pressure delivery conduit 112 may instead be inserted beneath the sealing member 108 at periphery 128.
[0037] In operation, the laminar dressing 102 is deployed on the tissue site 104 and reduced pressure is delivered to the tissue site 104. More specifically, the laminar dressing 102 is deployed proximate the tissue site 104 where treatment is desired. The sealing member 108 is positioned over the laminar dressing 102 and at least a portion of the patient's epidermis 118 to form the sealed space 130. If not already provided in the sealing member 108, the aperture 111 may be formed in the sealing member 108 and the reduced-pressure connector 110 applied. The reduced-pressure delivery conduit 112 is fluidly coupled to the reduced-pressure connector 110 and to the reduced-pressure source 114. The reduced-pressure source 114 is activated and reduced pressure is delivered to the tissue site 104.
[0038] Referring now primarily to FIGS. 2 and 3, an illustrative laminar layer 200 is presented that may be included in a dressing or may be used as a dressing. In one illustrative example, the laminar layer 200 is the only layer in a dressing.
[0039] The laminar layer 200 has a first side 202 and a second, tissue-facing side 204.
The laminar layer 200 includes a plurality of channel walls 206 that form a plurality of channels 208. In the illustrative example of FIG. 2, the channel walls 206 are substantially parallel to one another and extend longitudinally in one direction parallel to an axis indicated by an arrow 210.
However, in other embodiments, the channel walls 206 may extend along any number of
9 directions, and may intersect one another at various points in the laminar layer 200. An illustrative example of a laminar layer in which the channel walls intersect is provided below in FIG. 4.
[0040] In the illustrative embodiment of FIGS. 2 and 3, the channels 208 are also angled or slanted relative to a surface 212, which may be planar, of the epidermis 214 or other tissue at or near a tissue site 216. At least two channels in the plurality of channels 208 share a common channel wall of the plurality of channel walls 206. For example, a first channel 218 and a second channel 220 of the plurality of channels 208 each share common channel wall 222 of the plurality of channel walls 206. In one embodiment, each of the channels 208 shares a respective common channel wall of the plurality of channel walls 206 with another channel in the plurality of channels 208. In another embodiment, the channels 208 may not share common channel walls.
[0041] In one embodiment, the channel walls 206 are made from or include a material that is gas permeable and substantially liquid impermeable. In one example, the channel walls 206 are composed of expanded poly(tetrafluoroethylene), such as a Gore-Tex material. In another example, the channel walls 206 are composed of poly(tetrafluoroethylene). The material or materials from which the laminar layer 200 is composed may also be elastic so that the laminar layer 200 better conforms to the shape and topology of the surface of the tissue site 216.
[0042] The channels 208 may serve to segregate and direct liquid flow away from the tissue site 216, yet reduce or substantially prevent lateral migration of liquid through the laminar layer 200. More specifically, the laminar layer 200 may reduce or substantially prevent liquid, such as exudate, from spreading along an interface between the laminar layer 200 and the tissue site 216. This benefit of the laminar layer is enhanced further when the laminar layer manifolds reduced pressure.
[0043] Referring now primarily to FIG. 3, a cross-sectional view of the laminar layer 200 is presented. The cross-sectional view of the laminar layer 200 illustrates that flow directions for liquids and gases may be different when reduced pressure is applied to the laminar layer 200 using a reduced pressure source, such as the reduced pressure source 114 in FIG. 1.
The gas directional flow 226 is shown in this illustrative embodiment as being substantially normal to the planar surface 212 of the tissue, e.g., epidermis 214, near the tissue site 216. The liquid directional flow 224 flows within the channels 208.
[0044] The differing direction of flow between the liquid flow 224 and the gas flow 226 is caused, at least in part, by the material from which the channel walls 206 are composed. In the embodiment illustrated in FIG. 3, the channel walls 206 are gas permeable and substantially liquid impermeable so that gas, such as air, may be drawn through the channel walls 206, while liquid (e.g., exudates) from the tissue site 216 is restricted or cannot pass through the channel walls 206. In this way, reduced pressure from a reduced pressure source, such as reduced pressure source 114 in FIGURE 1, may be distributed through the channel walls 206 such that a gas is drawn through the channel walls 206. As a result, reduced pressure is transferred to the tissue site 216 through the channel walls 206. Also, liquid, such as exudate from the tissue site 216, is drawn through at least a portion of the channels 208 to a desired location for processing or storage - including possible storage by another layer of the dressing. The segregated directional flow of the gas and liquid allow efficient application of reduced pressure and substantially prevent or reduce unwanted migration of liquid through the laminar layer 200, which assists in avoiding or reducing maceration of the epidermis 214.
[0045] In another embodiment, both the gas and the liquid may flow through the channels 208 in the direction indicated by the liquid flow arrows 224. In such an embodiment, the channel walls 206 may be substantially impermeable to both gas and liquid.
[0046] The channel walls 206 may form an angle 230 with the surface 212 at or near the tissue site 216. In the embodiment illustrated in FIGS. 2 and 3, each of the channels 208 also forms the same angle 230 with respect to the surface 212. In one example, the angle 230 is an acute angle. In another example, the angle 230 may be between about 20 degrees and about 90 degrees. In still another embodiment, the angle 230 may be about 45 degrees.
Although each of the channel walls 206 and channels 208 are shown to form the same angle with the surface 212, the channel walls 206 and channels 208 may also form different angles with the surface 212 from one another. While the angles that the channel walls 206 form with the surface 212 may vary from just greater than 0 degrees up to 90 degrees (i.e. substantially perpendicular to surface 212), the value of angle 230 may determine the compressibility of the laminar layer 200 when subjected to reduced pressure. For example, a laminar layer 200 having channel walls 206 arranged perpendicular to surface 212 will likely result in a laminar layer 200 that is less compressible than one that includes channel walls 206 oriented at 45 degrees.
It should also be noted, however, that as the angle 230 approaches 0 degrees, the benefit afforded by the channel walls 206 may be less since the channel walls 206 are less able to prevent lateral migration of liquid through the laminar layer 200.
[0047] The channels 208 may have a length 232 and a width 234. The length 232 of any two of the channels 208 may differ from one another or be the same. A portion of the channels 208 may also have the same length or be different. In one example, a majority of the channels 208 have a length 232 that exceeds the width 234. In another example, all of the channels 208 have a length 232 that exceeds their width 234. In the example of FIG. 3, each of the channels 208 has the same width 234. However, in other embodiments, the width 234 of each of the channels 208 may also vary from one another. In an illustrative embodiment, the width 234 of the channels, and thus the distance between the channel walls 206, is between about 1 mm and about 2 mm. In still another embodiment, the width 234 is greater than or equal to about 1 mm.
[0048] The thickness of the channel walls 206 may vary depending on the material from which the wall is constructed. The thickness of each channel wall 206 may be uniform or may vary relative to other channel walls 206 in a particular laminar layer 200. In one illustrative embodiment, the thickness of each of the plurality of channel walls 206 is between about 0.25 mm and about 0.5 mm.
[0049] Although the laminar layer 200 is shown to have a rectangular cross-sectional shape, the laminar layer 200 may have any cross-sectional shape. For example, any or all of the corners or edges of the laminar layer 200 may be rounded. Such a rounded configuration may ensure a better fit between the laminar layer 200 and a sealing member, such as sealing member 120 in FIG. 1. The cross-sectional shape of the laminar layer 200 may be square, circular, elliptical, polygonal, or any other shape that allows the laminar layer 200 to distribute reduced pressure.
[0050] A biasing member 244 may be positioned between the channel walls 206 to substantially prevent collapse of the channels 208 when the laminar layer 200 is subjected to compressive forces caused by the application of reduced pressure. The biasing member 244 may exert a biasing force on the channel walls 206 during compression of the laminar layer 200 to allow continued liquid flow through the channels 208. In the embodiment illustrated in FIGS. 2 and 3, the biasing member 244 may be a porous foam that is positioned between the channel walls 206. In one embodiment, the porous foam may be an open-cell, reticulated foam such as, for example, a polyurethane foam or a polyvinyl alcohol (PVA) foam.
In other embodiments, the biasing member 244 may be a corrugated material, a spring, or any other material or device that is capable of preventing total collapse of the channels 208 and allowing continued flow of liquids through the channels 208.
[0051] While the laminar layer 200 has been described as having a plurality of channel walls 206 with biasing members 244 positioned within the channels 208 between the channel walls 206, the laminar layer 200 may alternatively be described as a porous pad that includes a plurality of channel walls 206 and channels 208. In this embodiment, the porous material of the porous pad would serve as a biasing member to prevent total collapse of the channels 208. The porous material of the porous pad may be an open-cell, reticulated foam such as polyurethane, polyvinyl alcohol, or any other suitable material.
[0052] Referring now primarily to FIG. 4, an illustrative laminar layer 300 is presented.
While analogous in many respects to the laminar layer 200 of FIGS. 2 and 3, the laminar layer 300 not only includes a first plurality of channel walls 302 but also includes a second plurality of channel walls 304 that extend along a direction that is substantially perpendicular to the first plurality of channel walls 302. Although the second channel walls 304 are perpendicular to the first channel walls 302 in this illustrative embodiment, the second channel walls 304 may form any angle with the first channel walls 302. Also, although channel walls 302 and 304 are shown to be straight, the channel walls 302 and 304 may be curved in shape, including circular or elliptical shapes.
[0053] The intersection of the channel walls 302 and 304 in the laminar layer 300 forms rectangular-shaped channels 306. However, the channels 306 formed by the channel walls 302 and 304 may have any shape, including a polygonal, triangular, circular, elliptical, or any other shape. Liquid from a tissue site may be drawn through the channels 306 using reduced pressure.
[0054] Referring now primarily to FIG. 5, a dressing 415, which includes laminar layer 400, is shown according to an illustrative embodiment. The dressing 415 includes a sealing member 425, which covers the laminar layer 400. In the example illustrated in FIG. 5, the laminar layer 400 is the only layer in the dressing material that is covered by the sealing member 425. Reduced pressure is transferred from a reduced pressure source, such as the reduced pressure source 114 in FIG. 1, to the tissue site 404 via the laminar layer 400, as well as via a connection member 445.
[0055] The connection member 445 has a flange portion 466 that is disposed between the sealing member 425 and the laminar layer 400. The flange portion 466 of the connection member 445 may extend substantially across the entire width of the laminar layer 400. A tissue facing side 467 of the flange portion 466 may be adjacent to the laminar layer 400, and the flange portion 466 may have an opening that faces the laminar layer 400. The extension of the flange portion 466 across the entire width of the laminar layer 400 may facilitate a more even distribution of reduced pressure across the laminar layer 400 and better reception of liquid from the laminar layer 400 into the connection member 445. However, the flange portion 466 may have any width relative to the laminar layer 400.
[0056] Also, the sealing member 425 may conform to the shape of the laminar layer 400. Although a space is shown between the sealing member 425 and sides 480 of the laminar layer 400, the sealing member 425 may also touch the sides 480 of the laminar layer 400.
[0057] In one example, liquid, such as exudate, from the wound site 407 may be drawn through the channels 410 of the laminar layer 400. The liquid may be drawn through the channels 410 of the laminar layer 400 using reduced pressure that is distributed through the channel walls 405 of the laminar layer 400. The liquid, upon passing through the channels 410, may be drawn into the connection member 445. The liquid may then be transferred into a delivery tube, such as the reduced-pressure delivery conduit 112 in FIG. 1.
[0058] Referring now primarily to FIG. 6, a dressing 515, which includes laminar layer 500, is shown according to an illustrative embodiment. The dressing 515 further includes a connection member 565 having flange portion 566, a sealing member 525, and an absorbent layer 599. The absorbent layer 599 is positioned adjacent to the laminar layer 500. The absorbent layer 599 both distributes reduced pressure that is transferred to the dressing 515, and absorbs liquid from the tissue site 105 via the laminar layer 500.
[0059] The absorbent layer 599 may be one or more layers that absorb liquid.
The absorbent layer 599 has a first side 597 and a second, tissue-facing side 598.
At least a portion of the second, tissue-facing side 598 of the absorbent layer 599 abuts the laminar layer 500.
The absorbent layer 599 may have any thickness relative to the laminar layer 500. In one embodiment, the absorbent layer 599 may be thicker than the laminar layer 500, but alternatively, the absorbent layer 599 may be thinner than the laminar layer 500.
[0060] The sealing member 525 may conform to the shape of the absorbent layer and laminar layer 500. For example, although a space is shown between the sealing member 525 and the sides 580 of the laminar layer 500, the sealing member may also touch sides 580 of the laminar layer 500.
[0061] In one example, liquid, such as exudate, from the wound site 507 may be drawn through channels 510 of the laminar layer 500. The liquid may be drawn through the channels 510 of the laminar layer 500 using reduced pressure that is distributed through channel walls 505 of the laminar layer 500. The reduced pressure may be transferred to the dressing 515 via a delivery tube, which may be inserted into the connection member 565 using a slot 568 in the connection member 565. The liquid from the tissue site 504, upon passing through the channels 510, may be drawn into the absorbent layer 599. The liquid may be stored in the absorbent layer 599, thereby eliminating the need for an external fluid collection apparatus.
[0062] The laminar layers 200, 300, 400, 500 described herein are each illustrated as being positioned above, but not in contact with, the tissue site. While this may be a preferred arrangement of the laminar layer in some embodiments, in other embodiments it may be desirable to place at least a portion of the laminar layer in direct contact with the tissue site. In still other embodiments, it may be desirable to place a separate porous pad or other manifold between the tissue site and the laminar layer.
[0063] While the laminar layers described herein often include a porous foam with a plurality of channel walls, the laminar layer could alternatively be formed from a sheet of material that is substantially liquid impermeable and gas permeable. The sheet of material may preferably include holes, apertures, slits, or other openings that are positioned in the sheet of material to act as channels for liquids drawn through the laminar layer by reduced pressure. The liquid impermeable, gas permeable material would act as channel walls to allow better transmission of gas during the application of reduced pressure. In one illustrative embodiment, the material from which the laminar layer is formed may be expanded polytetrafluoroethylene (ePTFE), or any other material that is substantially liquid impermeable and gas permeable.
[0064] The dressings and laminar layers described herein may be used as part of a process or method for protecting tissue adjacent a tissue site from maceration and other damage during application of reduced pressure treatment to the tissue site. The method may include applying a dressing having substantially liquid impermeable and gas permeable channel walls to the tissue site. A gas is moved away from the tissue site through the channel walls, and a liquid is moved away from the tissue site between the channel walls. The channel walls serve to substantially prevent the liquid from spreading along an interface between the dressing and the tissue adjacent the tissue site.
[0065] In another illustrative embodiment, a method for applying a reduced pressure at a tissue site may include applying a laminar layer to the tissue, the laminar layer having a plurality of channel walls that form a plurality of channels through which liquid is capable of being drawn. The laminar layer is capable of transferring reduced pressure to the tissue site through the plurality of channel walls when placed under reduced pressure. A
portion of the laminar layer is covered with a sealing member to provide a seal over the tissue site, and a reduced pressure is applied to the laminar layer.
[0066] In yet another illustrative embodiment, a method of manufacturing a dressing for applying a reduced pressure to a tissue site is provided. The method includes forming a laminar layer having a plurality of channel walls that form a plurality of channels through which liquid is capable of being drawn. The laminar layer is operable to transfer reduced pressure to the tissue site through the plurality of channel walls. At least a portion of the laminar layer may be covered with a sealing member.
[0067] Although several illustrative embodiments and advantages have been disclosed herein, it should be understood that various changes, substitutions, permutations, and alterations can be made without departing from the scope of the invention as defined by the appended claims. It will be appreciated that any feature that is described in a connection to any one embodiment may also be applicable to any other embodiment.
[0040] In the illustrative embodiment of FIGS. 2 and 3, the channels 208 are also angled or slanted relative to a surface 212, which may be planar, of the epidermis 214 or other tissue at or near a tissue site 216. At least two channels in the plurality of channels 208 share a common channel wall of the plurality of channel walls 206. For example, a first channel 218 and a second channel 220 of the plurality of channels 208 each share common channel wall 222 of the plurality of channel walls 206. In one embodiment, each of the channels 208 shares a respective common channel wall of the plurality of channel walls 206 with another channel in the plurality of channels 208. In another embodiment, the channels 208 may not share common channel walls.
[0041] In one embodiment, the channel walls 206 are made from or include a material that is gas permeable and substantially liquid impermeable. In one example, the channel walls 206 are composed of expanded poly(tetrafluoroethylene), such as a Gore-Tex material. In another example, the channel walls 206 are composed of poly(tetrafluoroethylene). The material or materials from which the laminar layer 200 is composed may also be elastic so that the laminar layer 200 better conforms to the shape and topology of the surface of the tissue site 216.
[0042] The channels 208 may serve to segregate and direct liquid flow away from the tissue site 216, yet reduce or substantially prevent lateral migration of liquid through the laminar layer 200. More specifically, the laminar layer 200 may reduce or substantially prevent liquid, such as exudate, from spreading along an interface between the laminar layer 200 and the tissue site 216. This benefit of the laminar layer is enhanced further when the laminar layer manifolds reduced pressure.
[0043] Referring now primarily to FIG. 3, a cross-sectional view of the laminar layer 200 is presented. The cross-sectional view of the laminar layer 200 illustrates that flow directions for liquids and gases may be different when reduced pressure is applied to the laminar layer 200 using a reduced pressure source, such as the reduced pressure source 114 in FIG. 1.
The gas directional flow 226 is shown in this illustrative embodiment as being substantially normal to the planar surface 212 of the tissue, e.g., epidermis 214, near the tissue site 216. The liquid directional flow 224 flows within the channels 208.
[0044] The differing direction of flow between the liquid flow 224 and the gas flow 226 is caused, at least in part, by the material from which the channel walls 206 are composed. In the embodiment illustrated in FIG. 3, the channel walls 206 are gas permeable and substantially liquid impermeable so that gas, such as air, may be drawn through the channel walls 206, while liquid (e.g., exudates) from the tissue site 216 is restricted or cannot pass through the channel walls 206. In this way, reduced pressure from a reduced pressure source, such as reduced pressure source 114 in FIGURE 1, may be distributed through the channel walls 206 such that a gas is drawn through the channel walls 206. As a result, reduced pressure is transferred to the tissue site 216 through the channel walls 206. Also, liquid, such as exudate from the tissue site 216, is drawn through at least a portion of the channels 208 to a desired location for processing or storage - including possible storage by another layer of the dressing. The segregated directional flow of the gas and liquid allow efficient application of reduced pressure and substantially prevent or reduce unwanted migration of liquid through the laminar layer 200, which assists in avoiding or reducing maceration of the epidermis 214.
[0045] In another embodiment, both the gas and the liquid may flow through the channels 208 in the direction indicated by the liquid flow arrows 224. In such an embodiment, the channel walls 206 may be substantially impermeable to both gas and liquid.
[0046] The channel walls 206 may form an angle 230 with the surface 212 at or near the tissue site 216. In the embodiment illustrated in FIGS. 2 and 3, each of the channels 208 also forms the same angle 230 with respect to the surface 212. In one example, the angle 230 is an acute angle. In another example, the angle 230 may be between about 20 degrees and about 90 degrees. In still another embodiment, the angle 230 may be about 45 degrees.
Although each of the channel walls 206 and channels 208 are shown to form the same angle with the surface 212, the channel walls 206 and channels 208 may also form different angles with the surface 212 from one another. While the angles that the channel walls 206 form with the surface 212 may vary from just greater than 0 degrees up to 90 degrees (i.e. substantially perpendicular to surface 212), the value of angle 230 may determine the compressibility of the laminar layer 200 when subjected to reduced pressure. For example, a laminar layer 200 having channel walls 206 arranged perpendicular to surface 212 will likely result in a laminar layer 200 that is less compressible than one that includes channel walls 206 oriented at 45 degrees.
It should also be noted, however, that as the angle 230 approaches 0 degrees, the benefit afforded by the channel walls 206 may be less since the channel walls 206 are less able to prevent lateral migration of liquid through the laminar layer 200.
[0047] The channels 208 may have a length 232 and a width 234. The length 232 of any two of the channels 208 may differ from one another or be the same. A portion of the channels 208 may also have the same length or be different. In one example, a majority of the channels 208 have a length 232 that exceeds the width 234. In another example, all of the channels 208 have a length 232 that exceeds their width 234. In the example of FIG. 3, each of the channels 208 has the same width 234. However, in other embodiments, the width 234 of each of the channels 208 may also vary from one another. In an illustrative embodiment, the width 234 of the channels, and thus the distance between the channel walls 206, is between about 1 mm and about 2 mm. In still another embodiment, the width 234 is greater than or equal to about 1 mm.
[0048] The thickness of the channel walls 206 may vary depending on the material from which the wall is constructed. The thickness of each channel wall 206 may be uniform or may vary relative to other channel walls 206 in a particular laminar layer 200. In one illustrative embodiment, the thickness of each of the plurality of channel walls 206 is between about 0.25 mm and about 0.5 mm.
[0049] Although the laminar layer 200 is shown to have a rectangular cross-sectional shape, the laminar layer 200 may have any cross-sectional shape. For example, any or all of the corners or edges of the laminar layer 200 may be rounded. Such a rounded configuration may ensure a better fit between the laminar layer 200 and a sealing member, such as sealing member 120 in FIG. 1. The cross-sectional shape of the laminar layer 200 may be square, circular, elliptical, polygonal, or any other shape that allows the laminar layer 200 to distribute reduced pressure.
[0050] A biasing member 244 may be positioned between the channel walls 206 to substantially prevent collapse of the channels 208 when the laminar layer 200 is subjected to compressive forces caused by the application of reduced pressure. The biasing member 244 may exert a biasing force on the channel walls 206 during compression of the laminar layer 200 to allow continued liquid flow through the channels 208. In the embodiment illustrated in FIGS. 2 and 3, the biasing member 244 may be a porous foam that is positioned between the channel walls 206. In one embodiment, the porous foam may be an open-cell, reticulated foam such as, for example, a polyurethane foam or a polyvinyl alcohol (PVA) foam.
In other embodiments, the biasing member 244 may be a corrugated material, a spring, or any other material or device that is capable of preventing total collapse of the channels 208 and allowing continued flow of liquids through the channels 208.
[0051] While the laminar layer 200 has been described as having a plurality of channel walls 206 with biasing members 244 positioned within the channels 208 between the channel walls 206, the laminar layer 200 may alternatively be described as a porous pad that includes a plurality of channel walls 206 and channels 208. In this embodiment, the porous material of the porous pad would serve as a biasing member to prevent total collapse of the channels 208. The porous material of the porous pad may be an open-cell, reticulated foam such as polyurethane, polyvinyl alcohol, or any other suitable material.
[0052] Referring now primarily to FIG. 4, an illustrative laminar layer 300 is presented.
While analogous in many respects to the laminar layer 200 of FIGS. 2 and 3, the laminar layer 300 not only includes a first plurality of channel walls 302 but also includes a second plurality of channel walls 304 that extend along a direction that is substantially perpendicular to the first plurality of channel walls 302. Although the second channel walls 304 are perpendicular to the first channel walls 302 in this illustrative embodiment, the second channel walls 304 may form any angle with the first channel walls 302. Also, although channel walls 302 and 304 are shown to be straight, the channel walls 302 and 304 may be curved in shape, including circular or elliptical shapes.
[0053] The intersection of the channel walls 302 and 304 in the laminar layer 300 forms rectangular-shaped channels 306. However, the channels 306 formed by the channel walls 302 and 304 may have any shape, including a polygonal, triangular, circular, elliptical, or any other shape. Liquid from a tissue site may be drawn through the channels 306 using reduced pressure.
[0054] Referring now primarily to FIG. 5, a dressing 415, which includes laminar layer 400, is shown according to an illustrative embodiment. The dressing 415 includes a sealing member 425, which covers the laminar layer 400. In the example illustrated in FIG. 5, the laminar layer 400 is the only layer in the dressing material that is covered by the sealing member 425. Reduced pressure is transferred from a reduced pressure source, such as the reduced pressure source 114 in FIG. 1, to the tissue site 404 via the laminar layer 400, as well as via a connection member 445.
[0055] The connection member 445 has a flange portion 466 that is disposed between the sealing member 425 and the laminar layer 400. The flange portion 466 of the connection member 445 may extend substantially across the entire width of the laminar layer 400. A tissue facing side 467 of the flange portion 466 may be adjacent to the laminar layer 400, and the flange portion 466 may have an opening that faces the laminar layer 400. The extension of the flange portion 466 across the entire width of the laminar layer 400 may facilitate a more even distribution of reduced pressure across the laminar layer 400 and better reception of liquid from the laminar layer 400 into the connection member 445. However, the flange portion 466 may have any width relative to the laminar layer 400.
[0056] Also, the sealing member 425 may conform to the shape of the laminar layer 400. Although a space is shown between the sealing member 425 and sides 480 of the laminar layer 400, the sealing member 425 may also touch the sides 480 of the laminar layer 400.
[0057] In one example, liquid, such as exudate, from the wound site 407 may be drawn through the channels 410 of the laminar layer 400. The liquid may be drawn through the channels 410 of the laminar layer 400 using reduced pressure that is distributed through the channel walls 405 of the laminar layer 400. The liquid, upon passing through the channels 410, may be drawn into the connection member 445. The liquid may then be transferred into a delivery tube, such as the reduced-pressure delivery conduit 112 in FIG. 1.
[0058] Referring now primarily to FIG. 6, a dressing 515, which includes laminar layer 500, is shown according to an illustrative embodiment. The dressing 515 further includes a connection member 565 having flange portion 566, a sealing member 525, and an absorbent layer 599. The absorbent layer 599 is positioned adjacent to the laminar layer 500. The absorbent layer 599 both distributes reduced pressure that is transferred to the dressing 515, and absorbs liquid from the tissue site 105 via the laminar layer 500.
[0059] The absorbent layer 599 may be one or more layers that absorb liquid.
The absorbent layer 599 has a first side 597 and a second, tissue-facing side 598.
At least a portion of the second, tissue-facing side 598 of the absorbent layer 599 abuts the laminar layer 500.
The absorbent layer 599 may have any thickness relative to the laminar layer 500. In one embodiment, the absorbent layer 599 may be thicker than the laminar layer 500, but alternatively, the absorbent layer 599 may be thinner than the laminar layer 500.
[0060] The sealing member 525 may conform to the shape of the absorbent layer and laminar layer 500. For example, although a space is shown between the sealing member 525 and the sides 580 of the laminar layer 500, the sealing member may also touch sides 580 of the laminar layer 500.
[0061] In one example, liquid, such as exudate, from the wound site 507 may be drawn through channels 510 of the laminar layer 500. The liquid may be drawn through the channels 510 of the laminar layer 500 using reduced pressure that is distributed through channel walls 505 of the laminar layer 500. The reduced pressure may be transferred to the dressing 515 via a delivery tube, which may be inserted into the connection member 565 using a slot 568 in the connection member 565. The liquid from the tissue site 504, upon passing through the channels 510, may be drawn into the absorbent layer 599. The liquid may be stored in the absorbent layer 599, thereby eliminating the need for an external fluid collection apparatus.
[0062] The laminar layers 200, 300, 400, 500 described herein are each illustrated as being positioned above, but not in contact with, the tissue site. While this may be a preferred arrangement of the laminar layer in some embodiments, in other embodiments it may be desirable to place at least a portion of the laminar layer in direct contact with the tissue site. In still other embodiments, it may be desirable to place a separate porous pad or other manifold between the tissue site and the laminar layer.
[0063] While the laminar layers described herein often include a porous foam with a plurality of channel walls, the laminar layer could alternatively be formed from a sheet of material that is substantially liquid impermeable and gas permeable. The sheet of material may preferably include holes, apertures, slits, or other openings that are positioned in the sheet of material to act as channels for liquids drawn through the laminar layer by reduced pressure. The liquid impermeable, gas permeable material would act as channel walls to allow better transmission of gas during the application of reduced pressure. In one illustrative embodiment, the material from which the laminar layer is formed may be expanded polytetrafluoroethylene (ePTFE), or any other material that is substantially liquid impermeable and gas permeable.
[0064] The dressings and laminar layers described herein may be used as part of a process or method for protecting tissue adjacent a tissue site from maceration and other damage during application of reduced pressure treatment to the tissue site. The method may include applying a dressing having substantially liquid impermeable and gas permeable channel walls to the tissue site. A gas is moved away from the tissue site through the channel walls, and a liquid is moved away from the tissue site between the channel walls. The channel walls serve to substantially prevent the liquid from spreading along an interface between the dressing and the tissue adjacent the tissue site.
[0065] In another illustrative embodiment, a method for applying a reduced pressure at a tissue site may include applying a laminar layer to the tissue, the laminar layer having a plurality of channel walls that form a plurality of channels through which liquid is capable of being drawn. The laminar layer is capable of transferring reduced pressure to the tissue site through the plurality of channel walls when placed under reduced pressure. A
portion of the laminar layer is covered with a sealing member to provide a seal over the tissue site, and a reduced pressure is applied to the laminar layer.
[0066] In yet another illustrative embodiment, a method of manufacturing a dressing for applying a reduced pressure to a tissue site is provided. The method includes forming a laminar layer having a plurality of channel walls that form a plurality of channels through which liquid is capable of being drawn. The laminar layer is operable to transfer reduced pressure to the tissue site through the plurality of channel walls. At least a portion of the laminar layer may be covered with a sealing member.
[0067] Although several illustrative embodiments and advantages have been disclosed herein, it should be understood that various changes, substitutions, permutations, and alterations can be made without departing from the scope of the invention as defined by the appended claims. It will be appreciated that any feature that is described in a connection to any one embodiment may also be applicable to any other embodiment.
Claims (140)
- Claim 1. A system for applying a reduced pressure at a tissue site, the system comprising:
a reduced pressure source operable to supply reduced pressure;
a porous pad in fluid communication with the reduced pressure source, the porous pad having a plurality of channel walls to form a plurality of channels between the channel walls, the channel walls being gas permeable to allow movement of a gas through the channel walls as reduced pressure is applied at the tissue site, the channel walls being substantially liquid impermeable to prevent movement of a liquid through the channel walls, the liquid impermeability of the channel walls and the application of reduced pressure causing flow of the liquid to occur through the plurality of channels; and a drape positionable over the porous pad to seal the porous pad at the tissue site such that reduced pressure can be maintained at the tissue site. - Claim 2. The system of claim 1 further comprising a delivery tube operable to transfer reduced pressure between the reduced pressure source and the laminar layer.
- Claim 3. The system of claim 1, further comprising:
a biasing member positioned between at least two of the plurality of channel walls to substantially prevent collapse of at least one of the plurality of channels during application of reduced pressure. - Claim 4. The system of claim 1, wherein:
the porous pad includes an open-cell, reticulated foam; and the open-cell, reticulated foam is positioned between the plurality of channel walls to substantially prevent collapse of the plurality of channels during application of reduced pressure. - Claim 5. The system of claim 1, wherein the porous pad includes an open-cell, reticulated foam.
- Claim 6. The system of claim 1, wherein application of the reduced pressure and the liquid impermeability of the channel walls cause the liquid to be drawn through the plurality of channels.
- Claim 7. The system of claim 1, wherein the plurality of channels are parallel to one another.
- Claim 8. The system of claim 1, wherein the plurality of channel walls are angled relative to a skin surface adjacent the tissue site.
- Claim 9. The system of claim 1, wherein:
the plurality of channel walls are parallel to one another; and each of the plurality of channel walls forms an angle of between about 20 degrees and about 90 degrees with a skin surface adjacent the tissue site. - Claim 10. The system of claim 1, wherein:
the plurality of channel walls are parallel to one another; and each of the plurality of channel walls forms an angle of about 45 degrees with a skin surface adjacent the tissue site. - Claim 11. The system of claim 1, wherein:
the plurality of channel walls are parallel to one another; and a distance between each channel wall of the plurality of channel walls and an adjacent channel wall is greater than or equal to about 1 mm. - Claim 12. The system of claim 1, wherein:
the plurality of channel walls are parallel to one another; and a distance between each channel wall of the plurality of channel walls and an adjacent channel wall is between about 1 mm and about 2 mm. - Claim 13. The system of claim 1, wherein the thickness of each of the plurality of channel walls is between about 0.25 mm and about 0.5 mm.
- Claim 14. The system of claim 1, wherein the plurality of channel walls include expanded polytetrafluoroethylene.
- Claim 15. The system of claim 1, wherein a cross-sectional shape of each of the plurality of channels is one of a square, triangle, or circle.
- Claim 16. The system of claim 1, wherein at least two channels in the plurality of channels share a common channel wall in the plurality of channel walls.
- Claim 17. The system of claim 1, wherein each of the plurality of channels shares a respective common channel wall in the plurality of channel walls with another channel in the plurality of channels.
- Claim 18. The system of claim 1, wherein a length of each of the plurality of channels exceeds a width of each of the plurality of channels.
- Claim 19. The system of claim 1, wherein the porous pad contacts the tissue site.
- Claim 20. The system of claim 1, further comprising an absorbent layer adjacent to the porous pad, wherein the absorbent layer absorbs liquid from the tissue site via the plurality of channels.
- Claim 21. The system of claim 1, further comprising a second porous pad positioned between the tissue site and the first porous pad.
- Claim 22. The system of claim 1, wherein the channel walls of the porous pad substantially prevent the liquid from spreading along an interface between the porous pad and the tissue site.
- Claim 23. A system for applying a reduced pressure at a tissue site, the system comprising:
a reduced pressure source operable to supply reduced pressure;
a laminar layer in fluid communication with the reduced pressure source, the laminar layer having a plurality of channel walls that form a plurality of channels through which liquid is drawn, the laminar layer operable to transfer reduced pressure to the tissue site through the plurality of channel walls; and a sealing member covering at least a portion of the laminar layer. - Claim 24. The system of claim 23 further comprising a delivery tube operable to transfer reduced pressure between the reduced pressure source and the laminar layer.
- Claim 25. The system of claim 23, further comprising:
a biasing member positioned between at least two of the plurality of channel walls to substantially prevent collapse of at least one of the plurality of channels during application of reduced pressure. - Claim 26. The system of claim 23 further comprising:
a porous foam positioned between the plurality of channel walls to substantially prevent collapse of the plurality of channels during application of reduced pressure. - Claim 27. The system of claim 26, wherein the porous foam is an open-cell, reticulated foam.
- Claim 28. The system of claim 23, wherein the plurality of channel walls are a plurality of gas permeable channels walls.
- Claim 29. The system of claim 28, wherein a gas is drawn though the plurality of gas permeable channels walls.
- Claim 30. The system of claim 23, wherein the plurality of channel walls are liquid impermeable.
- Claim 31. The system of claim 30, wherein the plurality of channel walls are impermeable to exudate from the tissue site.
- Claim 32. The system of claim 30, wherein application of the reduced pressure and the liquid impermeability of the channel walls cause the liquid to be drawn through the plurality of channels.
- Claim 33. The system of claim 23, wherein the plurality of channels are parallel to one another.
- Claim 34. The system of claim 23, wherein the plurality of channel walls are angled relative to a skin surface adjacent the tissue site.
- Claim 35. The system of claim 23, wherein:
the plurality of channel walls are parallel to one another; and each of the plurality of channel walls forms an angle of between about 20 degrees and about 90 degrees with a skin surface adjacent the tissue site. - Claim 36. The system of claim 23, wherein:
the plurality of channel walls are parallel to one another; and each of the plurality of channel walls forms an angle of about 45 degrees with a skin surface adjacent the tissue site. - Claim 37. The system of claim 23, wherein:
the plurality of channel walls are parallel to one another; and a distance between each channel wall of the plurality of channel walls and an adjacent channel wall is greater than or equal to about 23 mm. - Claim 38. The system of claim 23, wherein:
the plurality of channel walls are parallel to one another; and a distance between each channel wall of the plurality of channel walls and an adjacent channel wall is between about 23 mm and about 2 mm. - Claim 39. The system of claim 23, wherein the thickness of each of the plurality of channel walls is between about 0.25 mm and about 0.5 mm.
- Claim 40. The system of claim 23, wherein the plurality of channel walls include expanded polytetrafluoroethylene.
- Claim 41. The system of claim 23, wherein a cross-sectional shape of each of the plurality of channels is one of a square, triangle, or circle.
- Claim 42. The system of claim 23, wherein at least two channels in the plurality of channels share a common channel wall in the plurality of channel walls.
- Claim 43. The system of claim 23, wherein each of the plurality of channels shares a respective common channel wall in the plurality of channel walls with another channel in the plurality of channels.
- Claim 44. The system of claim 23, wherein a length of each of the plurality of channels exceeds a width of each of the plurality of channels.
- Claim 45. The system of claim 23, wherein the laminar layer contacts the tissue site.
- Claim 46. The system of claim 23, further comprising an absorbent layer adjacent to the laminar layer, wherein the absorbent layer absorbs liquid from the tissue site via the plurality of channels.
- Claim 47. The system of claim 23, further comprising a porous pad positioned between the tissue site and the laminar layer.
- Claim 48. The system of claim 23, wherein the laminar layer substantially prevents the liquid from spreading along an interface between the laminar layer and the tissue site.
- Claim 49. A system for applying a reduced pressure at a tissue site, the system comprising:
a reduced pressure source operable to supply reduced pressure;
a laminar layer in fluid communication with the reduced pressure source, the laminar layer having a plurality of channel walls to form a plurality of channels between the channel walls, the channel walls being substantially liquid impermeable and gas permeable, the channel walls being parallel to one another and forming an angle of between about 20 degrees and about 90 degrees with a skin surface adjacent the tissue site; and a drape positionable over the laminar layer to seal the laminar layer at the tissue site such that reduced pressure can be maintained at the tissue site. - Claim 50. The system of claim 49 further comprising a delivery tube operable to transfer reduced pressure between the reduced pressure source and the laminar layer.
- Claim 51. The system of claim 49, further comprising:
a biasing member positioned between at least two of the plurality of channel walls to substantially prevent collapse of at least one of the plurality of channels during application of reduced pressure. - Claim 52. The system of claim 49 further comprising:
a porous foam positioned between the plurality of channel walls to substantially prevent collapse of the plurality of channels during application of reduced pressure. - Claim 53. The system of claim 52, wherein the porous foam is an open-cell, reticulated foam.
- Claim 54. The system of claim 49, wherein a gas is drawn though the plurality of gas permeable channels walls.
- Claim 55. The system of claim 49, wherein the plurality of channel walls substantially prevent exudate from the tissue site from moving through the plurality of channel walls.
- Claim 56. The system of claim 49, wherein application of the reduced pressure and the liquid impermeability of the channel walls cause exudate from the tissue site to be drawn through the plurality of channels.
- Claim 57. The system of claim 49, wherein the angle is about 45 degrees.
- Claim 58. The system of claim 49, wherein a distance between each channel wall of the plurality of channel walls and an adjacent channel wall is greater than or equal to about 1 mm.
- Claim 59. The system of claim 49, wherein a distance between each channel wall of the plurality of channel walls and an adjacent channel wall is between about 1 mm and about 2 mm.
- Claim 60. The system of claim 49, wherein the thickness of each of the plurality of channel walls is between about 0.25 mm and about 0.5 mm.
- Claim 61. The system of claim 49, wherein the plurality of channel walls include expanded polytetrafluoroethylene.
- Claim 62. The system of claim 49, wherein a cross-sectional shape of each of the plurality of channels is one of a square, triangle, or circle.
- Claim 63. The system of claim 49, wherein at least two channels in the plurality of channels share a common channel wall in the plurality of channel walls.
- Claim 64. The system of claim 49, wherein each of the plurality of channels shares a respective common channel wall in the plurality of channel walls with another channel in the plurality of channels.
- Claim 65. The system of claim 49, wherein a length of each of the plurality of channels exceeds a width of each of the plurality of channels.
- Claim 66. The system of claim 49, wherein the laminar layer contacts the tissue site.
- Claim 67. The system of claim 49, further comprising an absorbent layer adjacent to the laminar layer, wherein the absorbent layer absorbs liquid from the tissue site via the plurality of channels.
- Claim 68. The system of claim 49, further comprising a porous pad positioned between the tissue site and the laminar layer.
- Claim 69. The system of claim 49, wherein the laminar layer substantially prevents the liquid from spreading along an interface between the laminar layer and the tissue site.
- Claim 70. A dressing for applying a reduced pressure at a tissue site, the dressing comprising:
a laminar layer having a plurality of channel walls that form a plurality of channels through which liquid is drawn, the laminar layer operable to transfer reduced pressure to the tissue site through the plurality of channel walls; and a sealing member covering at least a portion of the laminar layer to provide a seal over the tissue site. - Claim 71. The dressing of claim 70, further comprising:
a biasing member positioned between at least two of the plurality of channel walls to substantially prevent collapse of at least one of the plurality of channels during application of reduced pressure. - Claim 72. The dressing of claim 70 further comprising:
a porous foam positioned between the plurality of channel walls to substantially prevent collapse of the plurality of channels during application of reduced pressure. - Claim 73. The dressing of claim 72, wherein the porous foam is an open-cell, reticulated foam.
- Claim 74. The dressing of claim 70, wherein the plurality of channel walls are a plurality of gas permeable channels walls.
- Claim 75. The dressing of claim 74, wherein a gas is drawn though the plurality of gas permeable channels walls.
- Claim 76. The dressing of claim 70, wherein the plurality of channel walls are liquid impermeable.
- Claim 77. The dressing of claim 76, wherein the plurality of channel walls are impermeable to exudate from the tissue site.
- Claim 78. The dressing of claim 76, wherein application of the reduced pressure and the liquid impermeability of the channel walls cause the liquid to be drawn through the plurality of channels.
- Claim 79. The dressing of claim 70, wherein the plurality of channels are parallel to one another.
- Claim 80. The dressing of claim 70, wherein the plurality of channel walls are angled relative to a skin surface adjacent the tissue site.
- Claim 81. The dressing of claim 70, wherein:
the plurality of channel walls are parallel to one another; and each of the plurality of channel walls forms an angle of between about 20 degrees and about 90 degrees with a skin surface adjacent the tissue site. - Claim 82. The dressing of claim 70, wherein:
the plurality of channel walls are parallel to one another; and each of the plurality of channel walls forms an angle of about 45 degrees with a skin surface adjacent the tissue site. - Claim 83. The dressing of claim 70, wherein:
the plurality of channel walls are parallel to one another; and a distance between each channel wall of the plurality of channel walls and an adjacent channel wall is greater than or equal to about 70 mm. - Claim 84. The dressing of claim 70, wherein:
the plurality of channel walls are parallel to one another; and a distance between each channel wall of the plurality of channel walls and an adjacent channel wall is between about 70 mm and about 2 mm. - Claim 85. The dressing of claim 70, wherein the thickness of each of the plurality of channel walls is between about 0.25 mm and about 0.5 mm.
- Claim 86. The dressing of claim 70, wherein the plurality of channel walls include expanded polytetrafluoroethylene.
- Claim 87. The dressing of claim 70, wherein a cross-sectional shape of each of the plurality of channels is one of a square, triangle, or circle.
- Claim 88. The dressing of claim 70, wherein at least two channels in the plurality of channels share a common channel wall in the plurality of channel walls.
- Claim 89. The dressing of claim 70, wherein each of the plurality of channels shares a respective common channel wall in the plurality of channel walls with another channel in the plurality of channels.
- Claim 90. The dressing of claim 70, wherein a length of each of the plurality of channels exceeds a width of each of the plurality of channels.
- Claim 91. The dressing of claim 70, wherein the laminar layer contacts the tissue site.
- Claim 92. The dressing of claim 70, further comprising an absorbent layer adjacent to the laminar layer, wherein the absorbent layer absorbs liquid from the tissue site via the plurality of channels.
- Claim 93. The dressing of claim 70, further comprising a porous pad positioned between the tissue site and the laminar layer.
- Claim 94. The dressing of claim 70, wherein the laminar layer substantially prevents the liquid from spreading along an interface between the laminar layer and the tissue site.
- Claim 95. A dressing for applying a reduced pressure at a tissue site, the dressing comprising:
a porous pad having a plurality of channel walls to form a plurality of channels between the channel walls, the channel walls being gas permeable to allow movement of a gas through the channel walls as reduced pressure is applied at the tissue site, the channel walls being substantially liquid impermeable to prevent movement of liquid through the channel walls, the liquid impermeability of the channel walls and the application of reduced pressure causing flow of the liquid to occur through the plurality of channels; and a drape positionable over the porous pad to seal the porous pad at the tissue site such that reduced pressure can be maintained at the tissue site. - Claim 96. The dressing of claim 95, further comprising:
a biasing member positioned between at least two of the plurality of channel walls to substantially prevent collapse of at least one of the plurality of channels during application of reduced pressure. - Claim 97. The dressing of claim 95, wherein:
the porous pad includes an open-cell, reticulated foam; and the open-cell, reticulated foam is positioned between the plurality of channel walls to substantially prevent collapse of the plurality of channels during application of reduced pressure. - Claim 98. The dressing of claim 95, wherein the porous pad includes an open-cell, reticulated foam.
- Claim 99. The dressing of claim 95, wherein application of the reduced pressure and the liquid impermeability of the channel walls cause the liquid to be drawn through the plurality of channels.
- Claim 100. The dressing of claim 95, wherein the plurality of channels are parallel to one another.
- Claim 101. The dressing of claim 95, wherein the plurality of channel walls are angled relative to a skin surface adjacent the tissue site.
- Claim 102. The dressing of claim 95, wherein:
the plurality of channel walls are parallel to one another; and each of the plurality of channel walls forms an angle of between about 20 degrees and about 90 degrees with a skin surface adjacent the tissue site. - Claim 103. The dressing of claim 95, wherein:
the plurality of channel walls are parallel to one another; and each of the plurality of channel walls forms an angle of about 45 degrees with a skin surface adjacent the tissue site. - Claim 104. The dressing of claim 95, wherein:
the plurality of channel walls are parallel to one another; and a distance between each channel wall of the plurality of channel walls and an adjacent channel wall is greater than or equal to about 1 mm. - Claim 105. The dressing of claim 95, wherein:
the plurality of channel walls are parallel to one another; and a distance between each channel wall of the plurality of channel walls and an adjacent channel wall is between about 1 mm and about 2 mm. - Claim 106. The dressing of claim 95, wherein the thickness of each of the plurality of channel walls is between about 0.25 mm and about 0.5 mm.
- Claim 107. The dressing of claim 95, wherein the plurality of channel walls include expanded polytetrafluoroethylene.
- Claim 108. The dressing of claim 95, wherein a cross-sectional shape of each of the plurality of channels is one of a square, triangle, or circle.
- Claim 109. The dressing of claim 95, wherein at least two channels in the plurality of channels share a common channel wall in the plurality of channel walls.
- Claim 110. The dressing of claim 95, wherein each of the plurality of channels shares a respective common channel wall in the plurality of channel walls with another channel in the plurality of channels.
- Claim 111. The dressing of claim 95, wherein a length of each of the plurality of channels exceeds a width of each of the plurality of channels.
- Claim 112. The dressing of claim 95, wherein the porous pad contacts the tissue site.
- Claim 113. The dressing of claim 95, further comprising an absorbent layer adjacent to the porous pad, wherein the absorbent layer absorbs liquid from the tissue site via the plurality of channels.
- Claim 114. The dressing of claim 95, further comprising a second porous pad positioned between the tissue site and the first porous pad.
- Claim 115. The dressing of claim 95, wherein the channel walls of the porous pad substantially prevent the liquid from spreading along an interface between the porous pad and the tissue site.
- Claim 116. A dressing for applying a reduced pressure at a tissue site, the dressing comprising:
a laminar layer having a plurality of channel walls to form a plurality of channels between the channel walls, the channel walls being substantially liquid impermeable and gas permeable, the channel walls being parallel to one another and forming an angle of between about 20 degrees and about 90 degrees with a skin surface adjacent the tissue site; and a drape positionable over the laminar layer to seal the laminar layer at the tissue site such that reduced pressure can be maintained at the tissue site. - Claim 117. The dressing of claim 116, further comprising:
a biasing member positioned between at least two of the plurality of channel walls to substantially prevent collapse of at least one of the plurality of channels during application of reduced pressure. - Claim 118. The dressing of claim 116 further comprising:
a porous foam positioned between the plurality of channel walls to substantially prevent collapse of the plurality of channels during application of reduced pressure. - Claim 119. The dressing of claim 118, wherein the porous foam is an open-cell, reticulated foam.
- Claim 120. The dressing of claim 116, wherein a gas is drawn though the plurality of gas permeable channels walls.
- Claim 121. The dressing of claim 116, wherein the plurality of channel walls substantially prevent exudate from the tissue site from moving through the plurality of channel walls.
- Claim 122. The dressing of claim 116, wherein application of the reduced pressure and the liquid impermeability of the channel walls cause exudate from the tissue site to be drawn through the plurality of channels.
- Claim 123. The dressing of claim 116, wherein the angle is about 45 degrees.
- Claim 124. The dressing of claim 116, wherein a distance between each channel wall of the plurality of channel walls and an adjacent channel wall is greater than or equal to about I
mm. - Claim 125. The dressing of claim 116, wherein a distance between each channel wall of the plurality of channel walls and an adjacent channel wall is between about 1 mm and about 2 mm.
- Claim 126. The dressing of claim 116, wherein the thickness of each of the plurality of channel walls is between about 0.25 mm and about 0.5 mm.
- Claim 127. The dressing of claim 116, wherein the plurality of channel walls include expanded polytetrafluoroethylene.
- Claim 128. The dressing of claim 116, wherein a cross-sectional shape of each of the plurality of channels is one of a square, triangle, or circle.
- Claim 129. The dressing of claim 116, wherein at least two channels in the plurality of channels share a common channel wall in the plurality of channel walls.
- Claim 130. The dressing of claim 116, wherein each of the plurality of channels shares a respective common channel wall in the plurality of channel walls with another channel in the plurality of channels.
- Claim 131. The dressing of claim 116, wherein a length of each of the plurality of channels exceeds a width of each of the plurality of channels.
- Claim 132. The dressing of claim 116, wherein the laminar layer contacts the tissue site.
- Claim 133. The dressing of claim 116, further comprising an absorbent layer adjacent to the laminar layer, wherein the absorbent layer absorbs liquid from the tissue site via the plurality of channels.
- Claim 134. The dressing of claim 116, further comprising a porous pad positioned between the tissue site and the laminar layer.
- Claim 135. The dressing of claim 116, wherein the laminar layer substantially prevents the liquid from spreading along an interface between the laminar layer and the tissue site.
- Claim 136. A method for protecting tissue adjacent a tissue site during application of reduced pressure treatment to the tissue site, the method comprising:
applying a dressing having substantially liquid impermeable and gas permeable channel walls to the tissue site;
moving a gas away from the tissue site through the channel walls; and moving a liquid away from the tissue site between the channel walls. - Claim 137. The method of claim 136, wherein the channel walls substantially prevent the liquid from spreading along an interface between the dressing and the tissue adjacent the tissue site.
- Claim 138. A method for applying a reduced pressure at a tissue site, the method comprising:
applying a laminar layer to the tissue site, the laminar layer having a plurality of channel walls that form a plurality of channels through which liquid is capable of being drawn, the laminar layer being capable of transferring reduced pressure to the tissue site through the plurality of channel walls when placed under reduced pressure;
covering at least a portion of the laminar layer with a sealing member to provide a seal over the tissue site; and applying a reduced pressure to the laminar layer. - Claim 139. A method of manufacturing a dressing for applying a reduced pressure at a tissue site, the method comprising:
forming a laminar layer having a plurality of channel walls that form a plurality of channels through which liquid is capable of being drawn, the laminar layer being operable to transfer reduced pressure to the tissue site through the plurality of channel walls. - Claim 140. The method of claim 139 further comprising:
covering at least a portion of the laminar layer with a sealing member.
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Families Citing this family (213)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0224986D0 (en) | 2002-10-28 | 2002-12-04 | Smith & Nephew | Apparatus |
GB0325129D0 (en) | 2003-10-28 | 2003-12-03 | Smith & Nephew | Apparatus in situ |
US11298453B2 (en) | 2003-10-28 | 2022-04-12 | Smith & Nephew Plc | Apparatus and method for wound cleansing with actives |
GB0325120D0 (en) * | 2003-10-28 | 2003-12-03 | Smith & Nephew | Apparatus with actives |
GB0325126D0 (en) | 2003-10-28 | 2003-12-03 | Smith & Nephew | Apparatus with heat |
US7909805B2 (en) | 2004-04-05 | 2011-03-22 | Bluesky Medical Group Incorporated | Flexible reduced pressure treatment appliance |
US8062272B2 (en) * | 2004-05-21 | 2011-11-22 | Bluesky Medical Group Incorporated | Flexible reduced pressure treatment appliance |
US7708724B2 (en) * | 2004-04-05 | 2010-05-04 | Blue Sky Medical Group Incorporated | Reduced pressure wound cupping treatment system |
US7776028B2 (en) | 2004-04-05 | 2010-08-17 | Bluesky Medical Group Incorporated | Adjustable overlay reduced pressure wound treatment system |
US10058642B2 (en) | 2004-04-05 | 2018-08-28 | Bluesky Medical Group Incorporated | Reduced pressure treatment system |
GB0409446D0 (en) | 2004-04-28 | 2004-06-02 | Smith & Nephew | Apparatus |
CN101257875A (en) | 2005-09-06 | 2008-09-03 | 泰科保健集团有限合伙公司 | Self contained wound dressing with micropump |
US7779625B2 (en) * | 2006-05-11 | 2010-08-24 | Kalypto Medical, Inc. | Device and method for wound therapy |
US7967810B2 (en) | 2006-10-20 | 2011-06-28 | Mary Beth Kelley | Sub-atmospheric wound-care system |
GB0722820D0 (en) | 2007-11-21 | 2008-01-02 | Smith & Nephew | Vacuum assisted wound dressing |
EP2987510B1 (en) | 2007-11-21 | 2020-10-28 | T.J. Smith & Nephew Limited | Suction device and dressing |
EP2214612B1 (en) | 2007-11-21 | 2019-05-01 | Smith & Nephew PLC | Wound dressing |
CN101868203B (en) | 2007-11-21 | 2014-10-22 | 史密夫及内修公开有限公司 | Wound dressing |
US11253399B2 (en) | 2007-12-06 | 2022-02-22 | Smith & Nephew Plc | Wound filling apparatuses and methods |
GB0723855D0 (en) | 2007-12-06 | 2008-01-16 | Smith & Nephew | Apparatus and method for wound volume measurement |
US20130096518A1 (en) | 2007-12-06 | 2013-04-18 | Smith & Nephew Plc | Wound filling apparatuses and methods |
GB0723872D0 (en) | 2007-12-06 | 2008-01-16 | Smith & Nephew | Apparatus for topical negative pressure therapy |
US8372049B2 (en) | 2008-03-05 | 2013-02-12 | Kci Licensing, Inc. | Dressing and method for applying reduced pressure to and collecting and storing fluid from a tissue site |
US9033942B2 (en) | 2008-03-07 | 2015-05-19 | Smith & Nephew, Inc. | Wound dressing port and associated wound dressing |
GB0804654D0 (en) | 2008-03-13 | 2008-04-16 | Smith & Nephew | Vacuum closure device |
US8152785B2 (en) | 2008-03-13 | 2012-04-10 | Tyco Healthcare Group Lp | Vacuum port for vacuum wound therapy |
HUE047281T2 (en) * | 2008-05-27 | 2020-04-28 | Smith & Nephew Inc | Negative pressure wound therapy device |
EP2288321B1 (en) * | 2008-05-27 | 2019-10-23 | Smith & Nephew, Inc. | Control unit with pump module for a negative pressure wound therapy device |
US9414968B2 (en) | 2008-09-05 | 2016-08-16 | Smith & Nephew, Inc. | Three-dimensional porous film contact layer with improved wound healing |
EP2586408B8 (en) * | 2008-09-18 | 2017-08-23 | KCI Licensing, Inc. | Dressings and systems for applying reduced pressure at a tissue site |
GB0902368D0 (en) | 2009-02-13 | 2009-04-01 | Smith & Nephew | Wound packing |
WO2010121186A1 (en) | 2009-04-17 | 2010-10-21 | Kalypto Medical, Inc. | Negative pressure wound therapy device |
US20100324516A1 (en) | 2009-06-18 | 2010-12-23 | Tyco Healthcare Group Lp | Apparatus for Vacuum Bridging and/or Exudate Collection |
US20110112490A1 (en) * | 2009-07-14 | 2011-05-12 | Vogel David C | Releasably Sealable Wound Dressing for NPWT |
US8469936B2 (en) * | 2009-07-15 | 2013-06-25 | Kci Licensing, Inc. | Reduced-pressure dressings, systems, and methods employing desolidifying barrier layers |
WO2011043863A2 (en) | 2009-08-13 | 2011-04-14 | Michael Simms Shuler | Methods and dressing systems for promoting healing of injured tissue |
WO2011087871A2 (en) | 2009-12-22 | 2011-07-21 | Smith & Nephew, Inc. | Apparatuses and methods for negative pressure wound therapy |
US8791315B2 (en) * | 2010-02-26 | 2014-07-29 | Smith & Nephew, Inc. | Systems and methods for using negative pressure wound therapy to manage open abdominal wounds |
US8814842B2 (en) | 2010-03-16 | 2014-08-26 | Kci Licensing, Inc. | Delivery-and-fluid-storage bridges for use with reduced-pressure systems |
WO2011113978A2 (en) * | 2010-03-18 | 2011-09-22 | Marquez Canada Juan | Vacuum therapy system for use on complex lesions |
US9492325B2 (en) * | 2010-04-16 | 2016-11-15 | Kci Licensing, Inc. | Dressings and methods for treating a tissue site on a patient |
GB201006986D0 (en) * | 2010-04-27 | 2010-06-09 | Smith & Nephew | Wound dressing |
GB201008347D0 (en) * | 2010-05-19 | 2010-07-07 | Smith & Nephew | Wound protection |
GB201006985D0 (en) * | 2010-04-27 | 2010-06-09 | Smith & Nephew | Wound dressing |
US9061095B2 (en) | 2010-04-27 | 2015-06-23 | Smith & Nephew Plc | Wound dressing and method of use |
GB201006983D0 (en) * | 2010-04-27 | 2010-06-09 | Smith & Nephew | Wound dressing |
USRE48117E1 (en) | 2010-05-07 | 2020-07-28 | Smith & Nephew, Inc. | Apparatuses and methods for negative pressure wound therapy |
USD692565S1 (en) | 2010-06-03 | 2013-10-29 | Smith & Nephew, Inc. | Organ protection layer |
ES2461916T3 (en) * | 2010-08-19 | 2014-05-21 | Paul Hartmann Ag | Dressing with foam content and ointment base for negative pressure therapy |
GB201015656D0 (en) | 2010-09-20 | 2010-10-27 | Smith & Nephew | Pressure control apparatus |
CA140188S (en) | 2010-10-15 | 2011-11-07 | Smith & Nephew | Medical dressing |
CA140189S (en) | 2010-10-15 | 2011-11-07 | Smith & Nephew | Medical dressing |
WO2013007973A2 (en) | 2011-07-14 | 2013-01-17 | Smith & Nephew Plc | Wound dressing and method of treatment |
GB201020005D0 (en) | 2010-11-25 | 2011-01-12 | Smith & Nephew | Composition 1-1 |
MX337627B (en) | 2010-11-25 | 2016-03-10 | Smith & Nephew | Composition i-ii and products and uses thereof. |
US9440010B2 (en) * | 2010-12-07 | 2016-09-13 | Kci Licensing, Inc. | Drape having microstrain inducing projections for treating a wound site |
US8613733B2 (en) | 2010-12-15 | 2013-12-24 | Kci Licensing, Inc. | Foam dressing with integral porous film |
WO2012087376A1 (en) | 2010-12-22 | 2012-06-28 | Smith & Nephew, Inc. | Apparatuses and methods for negative pressure wound therapy |
USD714433S1 (en) | 2010-12-22 | 2014-09-30 | Smith & Nephew, Inc. | Suction adapter |
CN102068045A (en) * | 2010-12-29 | 2011-05-25 | 上海护理佳实业有限公司 | Breast pad and production method thereof |
US9421132B2 (en) | 2011-02-04 | 2016-08-23 | University Of Massachusetts | Negative pressure wound closure device |
US9226737B2 (en) | 2011-02-04 | 2016-01-05 | University Of Massachusetts | Negative pressure wound closure device |
US10639118B2 (en) * | 2011-04-06 | 2020-05-05 | Entrotech Life Sciences, Inc. | Surgical incise drapes and methods for their application |
GB201108229D0 (en) | 2011-05-17 | 2011-06-29 | Smith & Nephew | Tissue healing |
CN103842000A (en) | 2011-05-24 | 2014-06-04 | 卡利普托医疗公司 | Device with controller and pump modules for providing negative pressure for wound therapy |
US9058634B2 (en) | 2011-05-24 | 2015-06-16 | Kalypto Medical, Inc. | Method for providing a negative pressure wound therapy pump device |
EP2714121B1 (en) * | 2011-05-25 | 2015-01-14 | KCI Licensing, Inc. | Wound healing system using positive pressure to promote granulation at a tissue site |
US9067003B2 (en) | 2011-05-26 | 2015-06-30 | Kalypto Medical, Inc. | Method for providing negative pressure to a negative pressure wound therapy bandage |
US9168179B2 (en) † | 2011-06-24 | 2015-10-27 | Kci Licensing, Inc. | Reduced-pressure dressings employing tissue-fixation elements |
US9393354B2 (en) | 2011-11-01 | 2016-07-19 | J&M Shuler Medical, Inc. | Mechanical wound therapy for sub-atmospheric wound care system |
BR112014010647A2 (en) | 2011-11-02 | 2017-04-25 | Smith & Nephew | pressure therapy devices and methods of use thereof |
US9084845B2 (en) | 2011-11-02 | 2015-07-21 | Smith & Nephew Plc | Reduced pressure therapy apparatuses and methods of using same |
US20150159066A1 (en) | 2011-11-25 | 2015-06-11 | Smith & Nephew Plc | Composition, apparatus, kit and method and uses thereof |
EP2787943B2 (en) | 2011-12-07 | 2018-02-28 | KCI Licensing, Inc. | Synthetic granulating gauze for use with reduced-pressure treatment systems |
US10940047B2 (en) | 2011-12-16 | 2021-03-09 | Kci Licensing, Inc. | Sealing systems and methods employing a hybrid switchable drape |
JP6089262B2 (en) | 2012-03-01 | 2017-03-08 | アルケア株式会社 | Wound care products |
EP3338821B1 (en) | 2012-03-12 | 2020-05-06 | Smith & Nephew plc | Dressing for reduced pressure wound therapy |
JP6276251B2 (en) | 2012-03-20 | 2018-02-07 | スミス アンド ネフュー ピーエルシーSmith & Nephew Public Limited Company | Operation control of decompression therapy system based on dynamic determination of duty cycle threshold |
CN104168865B (en) * | 2012-03-28 | 2016-10-26 | 凯希特许有限公司 | Assist the depressurized system separated with clinical parts of electronics, apply part and method |
USD733896S1 (en) | 2012-05-04 | 2015-07-07 | Genadyne Biotechnologies, Inc. | Abdominal dressing |
US9427505B2 (en) | 2012-05-15 | 2016-08-30 | Smith & Nephew Plc | Negative pressure wound therapy apparatus |
AU346291S (en) | 2012-05-15 | 2013-01-09 | Smith & Nephew | Medical dressing |
KR20150013300A (en) | 2012-05-18 | 2015-02-04 | 바스프 에스이 | Dust suppressing aggregate |
CN104394977B (en) | 2012-05-18 | 2017-03-22 | 巴斯夫欧洲公司 | Encapsulated particle |
CN107280857A (en) | 2012-05-22 | 2017-10-24 | 史密夫及内修公开有限公司 | Wound healing device |
US10070994B2 (en) | 2012-05-22 | 2018-09-11 | Smith & Nephew Plc | Apparatuses and methods for wound therapy |
EP3650055A1 (en) | 2012-05-23 | 2020-05-13 | Smith & Nephew plc | Apparatuses and methods for negative pressure wound therapy |
US10117782B2 (en) | 2012-05-24 | 2018-11-06 | Smith & Nephew, Inc. | Devices and methods for treating and closing wounds with negative pressure |
WO2014011703A1 (en) * | 2012-07-09 | 2014-01-16 | Kci Licensing, Inc. | Systems, methods, and devices for treating a tissue site on a mammal having hair proximate the tissue site |
US9962295B2 (en) | 2012-07-16 | 2018-05-08 | Smith & Nephew, Inc. | Negative pressure wound closure device |
CN104487033B (en) * | 2012-07-30 | 2018-06-15 | 凯希特许有限公司 | Decompression absorbability for treating tissue site applies part, system and manufactures the method for applying part |
DK2879636T3 (en) | 2012-08-01 | 2017-06-19 | Smith & Nephew | Wound dressing |
EP2879635A2 (en) | 2012-08-01 | 2015-06-10 | Smith & Nephew PLC | Wound dressing and method of treatment |
US20150202354A1 (en) * | 2012-09-04 | 2015-07-23 | Integrated Healing Technolgies, LLC | Wound Dressing |
WO2014078642A1 (en) | 2012-11-16 | 2014-05-22 | Basf Se | An encapsulated fertilizer particle containing pesticide |
EP4279094A3 (en) | 2012-11-16 | 2024-02-28 | 3M Innovative Properties Company | Medical drape with pattern adhesive layers |
US9561135B2 (en) | 2013-01-02 | 2017-02-07 | Kci Licensing, Inc. | Flexible, adherent, and non-polyurethane film wound drape cover |
WO2014107233A1 (en) * | 2013-01-02 | 2014-07-10 | Kci Licensing, Inc. | A medical drape having an ultra-thin drape film and a thick adhesive coating |
AU2013371545B2 (en) * | 2013-01-03 | 2018-05-17 | 3M Innovative Properties Company | Moisture absorbing seal |
GB201317746D0 (en) | 2013-10-08 | 2013-11-20 | Smith & Nephew | PH indicator |
WO2014113249A2 (en) * | 2013-01-16 | 2014-07-24 | Kci Licensing, Inc. | Ion exchange enhanced absorbent systems |
US9795724B2 (en) * | 2013-01-16 | 2017-10-24 | Kci Licensing, Inc. | Dressing with asymmetric absorbent core for negative pressure wound therapy |
CA2902776C (en) | 2013-03-13 | 2023-03-07 | Smith & Nephew Inc. | Wound treatment apparatus and use thereof |
CN105007869B (en) * | 2013-03-14 | 2020-11-27 | 凯希特许有限公司 | Absorbent dressing and method of making same |
RU2015142877A (en) | 2013-03-14 | 2017-04-18 | СМИТ ЭНД НЕФЬЮ ПиЭлСи | COMPRESSIBLE WOUND FILLERS AND SYSTEMS AND WAYS OF THEIR APPLICATION IN THE TREATMENT OF THE RAS WITH APPLICATION OF NEGATIVE PRESSURE |
US20160120706A1 (en) | 2013-03-15 | 2016-05-05 | Smith & Nephew Plc | Wound dressing sealant and use thereof |
US10695226B2 (en) | 2013-03-15 | 2020-06-30 | Smith & Nephew Plc | Wound dressing and method of treatment |
BR112015020855A2 (en) | 2013-03-15 | 2017-07-18 | Smith & Nephew | wound dressing and treatment method |
CN105338934A (en) * | 2013-05-16 | 2016-02-17 | Bsn医疗有限公司 | Wound care device for treating wounds by means of atmospheric negative pressure, comprising window that can be opened |
CN103691010B (en) * | 2013-06-04 | 2016-09-14 | 武汉维斯第医用科技股份有限公司 | Multi-layered foamed dressing for negative-pressure sealed drainage and preparation method thereof |
CA2918157A1 (en) * | 2013-07-16 | 2015-01-22 | Smith & Nephew Plc | Apparatus for wound therapy |
CN103394155B (en) * | 2013-07-24 | 2016-04-06 | 中国人民解放军第二军医大学 | Disposable portable negative pressure wound surface therapy system |
CN103566460A (en) * | 2013-10-07 | 2014-02-12 | 金进科技(深圳)有限公司 | Wound care instrument |
AU2014340232B2 (en) | 2013-10-21 | 2019-07-11 | Smith & Nephew Inc. | Negative pressure wound closure device |
EP3513773A1 (en) * | 2013-10-30 | 2019-07-24 | KCI Licensing, Inc. | Condensate absorbing and dissipating system |
US10016544B2 (en) * | 2013-10-30 | 2018-07-10 | Kci Licensing, Inc. | Dressing with differentially sized perforations |
WO2015065616A1 (en) | 2013-10-30 | 2015-05-07 | Kci Licensing, Inc. | Dressing with sealing and retention intereface |
EP3096725B1 (en) | 2014-01-21 | 2023-10-18 | Smith & Nephew plc | Wound treatment apparatuses |
RU2016133735A (en) | 2014-01-21 | 2018-02-28 | СМИТ ЭНД НЕФЬЮ ПиЭлСи | COMPRESSIVE BANDAGE FOR TREATMENT OF Wounds by NEGATIVE PRESSURE |
CN103830833B (en) * | 2014-02-12 | 2016-05-11 | 萨科(厦门)医疗科技有限公司 | A kind of negative pressure drainage device |
US11026844B2 (en) | 2014-03-03 | 2021-06-08 | Kci Licensing, Inc. | Low profile flexible pressure transmission conduit |
US10226566B2 (en) | 2014-04-23 | 2019-03-12 | Genadyne Biotechnologies, Inc. | System and process for removing bodily fluids from a body opening |
EP3854361B8 (en) * | 2014-06-05 | 2024-03-27 | Solventum Intellectual Properties Company | Dressing with fluid acquisition and distribution characteristics |
CA2952284C (en) | 2014-06-18 | 2023-03-28 | Smith & Nephew Plc | Wound dressing |
JP6659540B2 (en) * | 2014-07-07 | 2020-03-04 | 株式会社村田製作所 | Negative pressure closure therapy device |
US10485891B2 (en) * | 2014-10-06 | 2019-11-26 | Kci Licensing, Inc. | Multi-function dressing structure for negative-pressure therapy |
WO2016103032A1 (en) | 2014-12-22 | 2016-06-30 | Smith & Nephew Plc | Negative pressure wound therapy apparatus and methods |
HUE049136T2 (en) | 2015-04-27 | 2020-08-28 | Smith & Nephew | Reduced pressure apparatuses |
GB2537840B (en) * | 2015-04-27 | 2021-04-21 | Medtrade Products Ltd | Wound dressing |
EP3288509B1 (en) | 2015-04-29 | 2022-06-29 | Smith & Nephew, Inc | Negative pressure wound closure device |
CA2984231C (en) * | 2015-04-29 | 2021-05-25 | Oratex Inc. | Multi-layered fabric |
EP3294245B1 (en) | 2015-05-08 | 2019-09-04 | KCI Licensing, Inc. | Low acuity dressing with integral pump |
US10076594B2 (en) | 2015-05-18 | 2018-09-18 | Smith & Nephew Plc | Fluidic connector for negative pressure wound therapy |
US10583228B2 (en) | 2015-07-28 | 2020-03-10 | J&M Shuler Medical, Inc. | Sub-atmospheric wound therapy systems and methods |
US11096830B2 (en) * | 2015-09-01 | 2021-08-24 | Kci Licensing, Inc. | Dressing with increased apposition force |
WO2017048866A1 (en) * | 2015-09-17 | 2017-03-23 | Kci Licensing, Inc. | Hybrid silicone and acrylic adhesive cover for use with wound treatment |
GB2543544A (en) * | 2015-10-21 | 2017-04-26 | Brightwake Ltd | Wound dressing |
CA3009878A1 (en) | 2015-12-30 | 2017-07-06 | Smith & Nephew Plc | Negative pressure wound therapy apparatus |
US11090196B2 (en) | 2015-12-30 | 2021-08-17 | Smith & Nephew Plc | Absorbent negative pressure wound therapy dressing |
USD796735S1 (en) | 2016-02-29 | 2017-09-05 | Smith & Nephew Plc | Mount apparatus for portable negative pressure apparatus |
JP1586116S (en) | 2016-02-29 | 2017-09-19 | ||
CN109069708B (en) | 2016-03-04 | 2022-04-12 | 史密夫及内修公开有限公司 | Negative pressure wound therapy device for wounds after breast surgery |
CN109069301B (en) | 2016-03-07 | 2021-11-30 | 史密夫及内修公开有限公司 | Wound therapy apparatus and method utilizing a negative pressure source integrated into a wound dressing |
CN107185056A (en) * | 2016-03-15 | 2017-09-22 | 上佑实业股份有限公司 | The manufacture method of negative pressure wound therapy group, wound dressing and wound dressing |
EP4049692A1 (en) | 2016-04-26 | 2022-08-31 | Smith & Nephew PLC | Wound dressings and methods of use with integrated negative pressure source having a fluid ingress inhibition component |
WO2017191158A1 (en) | 2016-05-03 | 2017-11-09 | Smith & Nephew Plc | Systems and methods for driving negative pressure sources in negative pressure therapy systems |
JP6975170B2 (en) | 2016-05-03 | 2021-12-01 | スミス アンド ネフュー ピーエルシーSmith & Nephew Public Limited Company | Optimization of power transfer to negative pressure sources in negative pressure therapy systems |
WO2017191154A1 (en) | 2016-05-03 | 2017-11-09 | Smith & Nephew Plc | Negative pressure wound therapy device activation and control |
GB201608099D0 (en) * | 2016-05-09 | 2016-06-22 | Convatec Technologies Inc | Negative pressure wound dressing |
CA3030153C (en) | 2016-07-08 | 2023-10-24 | Convatec Technologies Inc. | Fluid flow sensing |
JP7071957B2 (en) | 2016-07-08 | 2022-05-19 | コンバテック・テクノロジーズ・インコーポレイテッド | Flexible negative pressure system |
CA3030151A1 (en) | 2016-07-08 | 2018-01-11 | Convatec Technologies Inc. | Fluid collection apparatus |
EP3503857B1 (en) | 2016-08-25 | 2024-04-17 | Smith & Nephew plc | Absorbent negative pressure wound therapy dressing |
US11135351B2 (en) | 2016-08-30 | 2021-10-05 | Smith & Nephew Plc | Systems and methods for applying reduced pressure therapy |
WO2018060144A1 (en) | 2016-09-27 | 2018-04-05 | Smith & Nephew Plc | Wound closure devices with dissolvable portions |
WO2018060417A1 (en) | 2016-09-30 | 2018-04-05 | Smith & Nephew Plc | Negative pressure wound treatment apparatuses and methods with integrated electronics |
GB2555584B (en) * | 2016-10-28 | 2020-05-27 | Smith & Nephew | Multi-layered wound dressing and method of manufacture |
CN110167495B (en) | 2016-11-02 | 2022-06-14 | 史密夫和内修有限公司 | Wound closure device |
US11806217B2 (en) | 2016-12-12 | 2023-11-07 | Smith & Nephew Plc | Wound dressing |
EP3592312B1 (en) | 2017-03-08 | 2024-01-10 | Smith & Nephew plc | Negative pressure wound therapy device control in presence of fault condition |
AU2018231771A1 (en) | 2017-03-09 | 2019-09-26 | Secretary, Department Of Biotechnology | A wound dressing for combined negative pressure and fluid delivery system |
US10046095B1 (en) | 2017-04-04 | 2018-08-14 | Aatru Medical, LLC | Wound therapy device and method |
US10583229B2 (en) | 2017-04-04 | 2020-03-10 | Aatru Medical, LLC | Negative pressure device and method |
US11160915B2 (en) | 2017-05-09 | 2021-11-02 | Smith & Nephew Plc | Redundant controls for negative pressure wound therapy systems |
US11628092B2 (en) | 2017-05-10 | 2023-04-18 | Mölnlycke Health Care Ab | Composite foam in wound treatment |
EP3634335B1 (en) | 2017-06-07 | 2023-05-24 | 3M Innovative Properties Company | Composite dressings for improved granulation and reduced maceration with negative-pressure treatment |
CA3065379A1 (en) | 2017-06-07 | 2018-12-13 | Kci Licensing, Inc. | Systems, apparatuses, and methods for negative-pressure treatment with reduced tissue in-growth |
AU2018282193A1 (en) | 2017-06-07 | 2019-12-19 | 3M Innovative Properties Company | Multi-layer wound filler for extended wear time |
SG11201909383PA (en) * | 2017-06-07 | 2019-11-28 | Kci Licensing Inc | Customizable composite dressings for improved granulation and reduced maceration negative-pressure treatment |
CN110944607A (en) | 2017-06-07 | 2020-03-31 | 凯希特许有限公司 | Method of manufacturing and assembling a bi-material tissue interface for negative pressure therapy |
WO2018226627A1 (en) | 2017-06-07 | 2018-12-13 | Kci Licensing, Inc. | Composite dressings for improved granulation and reduced maceration with negative-pressure treatment |
US20180353334A1 (en) * | 2017-06-07 | 2018-12-13 | Kci Licensing, Inc. | Tissue Contact Interface |
US11207217B2 (en) | 2017-06-07 | 2021-12-28 | Kci Licensing, Inc. | Methods for manufacturing and assembling dual material tissue interface for negative-pressure therapy |
EP3634520A1 (en) | 2017-06-07 | 2020-04-15 | KCI Licensing, Inc. | Peel and place dressing for negative -pressure treatment |
CA3065529A1 (en) | 2017-06-07 | 2018-12-13 | Kci Licensing, Inc. | Composite dressings for improved granulation reduced maceration with negative-pressure treatment |
US20210145648A1 (en) * | 2017-06-09 | 2021-05-20 | Kci Licensing, Inc. | Granulating Chronic Wound Dressing |
CN110662516B (en) | 2017-06-13 | 2022-02-22 | 史密夫及内修公开有限公司 | Wound closure devices and methods of use |
EP3638169A1 (en) | 2017-06-13 | 2020-04-22 | Smith & Nephew PLC | Collapsible structure and method of use |
CA3065380A1 (en) | 2017-06-14 | 2018-12-20 | T.J.Smith & Nephew, Limited | Negative pressure wound therapy apparatus |
US11583623B2 (en) | 2017-06-14 | 2023-02-21 | Smith & Nephew Plc | Collapsible structure for wound closure and method of use |
US11395873B2 (en) | 2017-06-14 | 2022-07-26 | Smith & Nephew, Inc. | Control of wound closure and fluid removal management in wound therapy |
EP3638174A1 (en) | 2017-06-14 | 2020-04-22 | Smith & Nephew plc | Collapsible sheet for wound closure and method of use |
JP2020523052A (en) | 2017-06-14 | 2020-08-06 | スミス アンド ネフュー インコーポレイテッド | Fluid removal management and control of wound closure in wound care |
US11554051B2 (en) | 2017-06-30 | 2023-01-17 | T.J. Smith And Nephew, Limited | Negative pressure wound therapy apparatus |
GB2561262B (en) * | 2017-07-13 | 2019-03-20 | Dentmed Ltd | A targeted drug delivery pad |
EP3658090B1 (en) | 2017-07-27 | 2021-11-10 | Smith & Nephew PLC | Customizable wound closure device |
US11559622B2 (en) * | 2017-07-29 | 2023-01-24 | Edward D. Lin | Deformation resistant wound therapy apparatus and related methods of use |
WO2019030136A1 (en) | 2017-08-07 | 2019-02-14 | Smith & Nephew Plc | Wound closure device with protective layer and method of use |
EP3675925A1 (en) | 2017-08-29 | 2020-07-08 | Smith & Nephew PLC | Systems and methods for monitoring wound closure |
GB201718070D0 (en) | 2017-11-01 | 2017-12-13 | Smith & Nephew | Negative pressure wound treatment apparatuses and methods with integrated electronics |
EP3681550B1 (en) | 2017-09-13 | 2023-11-08 | Smith & Nephew PLC | Negative pressure wound treatment apparatuses |
US11547611B2 (en) | 2017-09-22 | 2023-01-10 | Kci Licensing, Inc. | Wound dressings and systems with high-flow therapeutic gas sources for topical wound therapy and related methods |
US11141523B2 (en) | 2017-10-26 | 2021-10-12 | Kci Licensing, Inc. | Wound dressings and systems for effluent management of topical wound therapy and related methods |
GB201718054D0 (en) | 2017-11-01 | 2017-12-13 | Smith & Nephew | Sterilization of integrated negative pressure wound treatment apparatuses and sterilization methods |
EP3703632B1 (en) | 2017-11-01 | 2024-04-03 | Smith & Nephew plc | Negative pressure wound treatment apparatuses and methods with integrated electronics |
GB201718072D0 (en) | 2017-11-01 | 2017-12-13 | Smith & Nephew | Negative pressure wound treatment apparatuses and methods with integrated electronics |
WO2019139829A1 (en) | 2018-01-10 | 2019-07-18 | Kci Licensing, Inc. | Negative pressure wound therapy dressings with local oxygen generation for topical wound therapy and related methods |
WO2019139823A2 (en) * | 2018-01-10 | 2019-07-18 | Kci Licensing, Inc. | Wound dressings and systems with therapeutic gas and negative pressure sources for incision management and related methods |
GB201811449D0 (en) | 2018-07-12 | 2018-08-29 | Smith & Nephew | Apparatuses and methods for negative pressure wound therapy |
USD898925S1 (en) | 2018-09-13 | 2020-10-13 | Smith & Nephew Plc | Medical dressing |
WO2020124038A1 (en) | 2018-12-13 | 2020-06-18 | University Of Massachusetts | Negative pressure wound closure devices and methods |
EP3917471A1 (en) * | 2019-01-28 | 2021-12-08 | KCI Licensing, Inc. | Tearable dressing structure |
EP3982896A1 (en) * | 2019-06-12 | 2022-04-20 | KCI Licensing, Inc. | Composite dressing for tissue closure with negative pressure |
CN110393632A (en) * | 2019-07-17 | 2019-11-01 | 稳健医疗用品股份有限公司 | A kind of water repellency dressing and preparation method thereof |
US20220323666A1 (en) * | 2019-08-20 | 2022-10-13 | Kci Licensing, Inc. | Gel-Blocking Connection Assembly For Absorbent Negative Pressure Dressing |
WO2021038444A1 (en) * | 2019-08-28 | 2021-03-04 | Kci Licensing, Inc. | Pneumatic pressure massage device |
US11331221B2 (en) * | 2019-12-27 | 2022-05-17 | Convatec Limited | Negative pressure wound dressing |
US11160917B2 (en) | 2020-01-22 | 2021-11-02 | J&M Shuler Medical Inc. | Negative pressure wound therapy barrier |
US20220280701A1 (en) * | 2021-03-03 | 2022-09-08 | April Corella | Self-Enclosed Negative Pressure Wound Therapy Device |
US20230026730A1 (en) * | 2021-07-23 | 2023-01-26 | Convatec Limited | Selectively configurable wound dressing |
WO2023021429A1 (en) * | 2021-08-17 | 2023-02-23 | Fisher & Paykel Healthcare Limited | Apparatus for supplying fluid to a tissue area |
CN114931671A (en) * | 2022-05-11 | 2022-08-23 | 常州漫舒医疗科技有限公司 | Portable negative pressure therapeutic instrument system |
CN115363860A (en) * | 2022-07-11 | 2022-11-22 | 广州华一生物科技有限公司 | High-water-absorption negative-pressure wound protection device |
Family Cites Families (204)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US35203A (en) * | 1862-05-06 | Improvement in baling-presses | ||
US3172808A (en) * | 1965-03-09 | Method of treating wounds | ||
US1355846A (en) | 1920-02-06 | 1920-10-19 | David A Rannells | Medical appliance |
US2547758A (en) | 1949-01-05 | 1951-04-03 | Wilmer B Keeling | Instrument for treating the male urethra |
US2632443A (en) * | 1949-04-18 | 1953-03-24 | Eleanor P Lesher | Surgical dressing |
GB692578A (en) | 1949-09-13 | 1953-06-10 | Minnesota Mining & Mfg | Improvements in or relating to drape sheets for surgical use |
US2682873A (en) * | 1952-07-30 | 1954-07-06 | Johnson & Johnson | General purpose protective dressing |
NL189176B (en) | 1956-07-13 | 1900-01-01 | Hisamitsu Pharmaceutical Co | PLASTER BASED ON A SYNTHETIC RUBBER. |
US2969057A (en) * | 1957-11-04 | 1961-01-24 | Brady Co W H | Nematodic swab |
US3066672A (en) | 1960-09-27 | 1962-12-04 | Jr William H Crosby | Method and apparatus for serial sampling of intestinal juice |
GB1052614A (en) * | 1964-06-04 | |||
US3367332A (en) | 1965-08-27 | 1968-02-06 | Gen Electric | Product and process for establishing a sterile area of skin |
US3520300A (en) * | 1967-03-15 | 1970-07-14 | Amp Inc | Surgical sponge and suction device |
US3568675A (en) * | 1968-08-30 | 1971-03-09 | Clyde B Harvey | Fistula and penetrating wound dressing |
US4141361A (en) * | 1970-02-09 | 1979-02-27 | Snyder Manufacturing Co., Incorporated | Evacuator |
US3682180A (en) | 1970-06-08 | 1972-08-08 | Coilform Co Inc | Drain clip for surgical drain |
BE789293Q (en) * | 1970-12-07 | 1973-01-15 | Parke Davis & Co | MEDICO-SURGICAL DRESSING FOR BURNS AND SIMILAR LESIONS |
US3742952A (en) * | 1971-04-28 | 1973-07-03 | Alpha Ind Inc | Surgical suction pump assembly |
US3779243A (en) | 1971-10-15 | 1973-12-18 | J Tussey | Contamination free surgical evacuator |
US3774611A (en) | 1972-06-08 | 1973-11-27 | J Tussey | Stabilized contamination free surgical evacuator |
US3826254A (en) * | 1973-02-26 | 1974-07-30 | Verco Ind | Needle or catheter retaining appliance |
DE2527706A1 (en) | 1975-06-21 | 1976-12-30 | Hanfried Dr Med Weigand | DEVICE FOR THE INTRODUCTION OF CONTRAST AGENTS INTO AN ARTIFICIAL INTESTINAL OUTLET |
DE2640413C3 (en) | 1976-09-08 | 1980-03-27 | Richard Wolf Gmbh, 7134 Knittlingen | Catheter monitor |
NL7710909A (en) | 1976-10-08 | 1978-04-11 | Smith & Nephew | COMPOSITE STRAPS. |
GB1562244A (en) | 1976-11-11 | 1980-03-05 | Lock P M | Wound dressing materials |
US4080970A (en) | 1976-11-17 | 1978-03-28 | Miller Thomas J | Post-operative combination dressing and internal drain tube with external shield and tube connector |
US4139004A (en) | 1977-02-17 | 1979-02-13 | Gonzalez Jr Harry | Bandage apparatus for treating burns |
US4184510A (en) * | 1977-03-15 | 1980-01-22 | Fibra-Sonics, Inc. | Valued device for controlling vacuum in surgery |
US4165748A (en) * | 1977-11-07 | 1979-08-28 | Johnson Melissa C | Catheter tube holder |
US4145630A (en) * | 1977-12-05 | 1979-03-20 | Westinghouse Electric Corp. | Halogen-cycle type incandescent lamp |
US4256109A (en) | 1978-07-10 | 1981-03-17 | Nichols Robert L | Shut off valve for medical suction apparatus |
SE414994B (en) | 1978-11-28 | 1980-09-01 | Landstingens Inkopscentral | VENKATETERFORBAND |
BR7908937A (en) * | 1978-12-06 | 1981-06-30 | Svedman Paul | DEVICE FOR TREATING FABRICS, FOR EXAMPLE, SKIN |
US4266545A (en) | 1979-04-06 | 1981-05-12 | Moss James P | Portable suction device for collecting fluids from a closed wound |
US4284079A (en) * | 1979-06-28 | 1981-08-18 | Adair Edwin Lloyd | Method for applying a male incontinence device |
US4261363A (en) | 1979-11-09 | 1981-04-14 | C. R. Bard, Inc. | Retention clips for body fluid drains |
US4569348A (en) | 1980-02-22 | 1986-02-11 | Velcro Usa Inc. | Catheter tube holder strap |
ATE14835T1 (en) | 1980-03-11 | 1985-08-15 | Schmid Eduard | SKIN GRAFT PRESSURE BANDAGE. |
AT365445B (en) * | 1980-04-15 | 1982-01-11 | Chemiefaser Lenzing Ag | ASSOCIATION MATERIAL OR STITCHING PLASTER |
US4297995A (en) | 1980-06-03 | 1981-11-03 | Key Pharmaceuticals, Inc. | Bandage containing attachment post |
US4529402A (en) * | 1980-07-08 | 1985-07-16 | Snyder Laboratories, Inc. | Closed wound suction evacuator with rotary valve |
US4333468A (en) | 1980-08-18 | 1982-06-08 | Geist Robert W | Mesentery tube holder apparatus |
US4465485A (en) * | 1981-03-06 | 1984-08-14 | Becton, Dickinson And Company | Suction canister with unitary shut-off valve and filter features |
US4392853A (en) * | 1981-03-16 | 1983-07-12 | Rudolph Muto | Sterile assembly for protecting and fastening an indwelling device |
US4373519A (en) | 1981-06-26 | 1983-02-15 | Minnesota Mining And Manufacturing Company | Composite wound dressing |
US4392858A (en) | 1981-07-16 | 1983-07-12 | Sherwood Medical Company | Wound drainage device |
US4419097A (en) | 1981-07-31 | 1983-12-06 | Rexar Industries, Inc. | Attachment for catheter tube |
AU550575B2 (en) | 1981-08-07 | 1986-03-27 | Richard Christian Wright | Wound drainage device |
SE429197B (en) | 1981-10-14 | 1983-08-22 | Frese Nielsen | SAR TREATMENT DEVICE |
DE3146266A1 (en) * | 1981-11-21 | 1983-06-01 | B. Braun Melsungen Ag, 3508 Melsungen | COMBINED DEVICE FOR A MEDICAL SUCTION DRAINAGE |
US4551139A (en) | 1982-02-08 | 1985-11-05 | Marion Laboratories, Inc. | Method and apparatus for burn wound treatment |
US4475909A (en) | 1982-05-06 | 1984-10-09 | Eisenberg Melvin I | Male urinary device and method for applying the device |
EP0100148B1 (en) | 1982-07-06 | 1986-01-08 | Dow Corning Limited | Medical-surgical dressing and a process for the production thereof |
NZ206837A (en) | 1983-01-27 | 1986-08-08 | Johnson & Johnson Prod Inc | Thin film adhesive dressing:backing material in three sections |
US4548202A (en) | 1983-06-20 | 1985-10-22 | Ethicon, Inc. | Mesh tissue fasteners |
US4540412A (en) | 1983-07-14 | 1985-09-10 | The Kendall Company | Device for moist heat therapy |
US4543100A (en) | 1983-11-01 | 1985-09-24 | Brodsky Stuart A | Catheter and drain tube retainer |
US4525374A (en) * | 1984-02-27 | 1985-06-25 | Manresa, Inc. | Treating hydrophobic filters to render them hydrophilic |
GB2157958A (en) | 1984-05-03 | 1985-11-06 | Ernest Edward Austen Bedding | Ball game net support |
US4897081A (en) * | 1984-05-25 | 1990-01-30 | Thermedics Inc. | Percutaneous access device |
US5215522A (en) * | 1984-07-23 | 1993-06-01 | Ballard Medical Products | Single use medical aspirating device and method |
GB8419745D0 (en) | 1984-08-02 | 1984-09-05 | Smith & Nephew Ass | Wound dressing |
US4872450A (en) | 1984-08-17 | 1989-10-10 | Austad Eric D | Wound dressing and method of forming same |
US4655754A (en) | 1984-11-09 | 1987-04-07 | Stryker Corporation | Vacuum wound drainage system and lipids baffle therefor |
US4826494A (en) * | 1984-11-09 | 1989-05-02 | Stryker Corporation | Vacuum wound drainage system |
US4605399A (en) | 1984-12-04 | 1986-08-12 | Complex, Inc. | Transdermal infusion device |
US4664652A (en) * | 1985-02-07 | 1987-05-12 | Snyder Laboratories, Inc. | Wound evacuator |
US5037397A (en) | 1985-05-03 | 1991-08-06 | Medical Distributors, Inc. | Universal clamp |
US4718907A (en) * | 1985-06-20 | 1988-01-12 | Atrium Medical Corporation | Vascular prosthesis having fluorinated coating with varying F/C ratio |
US4640688A (en) * | 1985-08-23 | 1987-02-03 | Mentor Corporation | Urine collection catheter |
US4710165A (en) | 1985-09-16 | 1987-12-01 | Mcneil Charles B | Wearable, variable rate suction/collection device |
US4758220A (en) * | 1985-09-26 | 1988-07-19 | Alcon Laboratories, Inc. | Surgical cassette proximity sensing and latching apparatus |
US4733659A (en) | 1986-01-17 | 1988-03-29 | Seton Company | Foam bandage |
EP0256060A1 (en) | 1986-01-31 | 1988-02-24 | OSMOND, Roger L. W. | Suction system for wound and gastro-intestinal drainage |
US4838883A (en) * | 1986-03-07 | 1989-06-13 | Nissho Corporation | Urine-collecting device |
JPS62281965A (en) | 1986-05-29 | 1987-12-07 | テルモ株式会社 | Catheter and catheter fixing member |
GB8621884D0 (en) | 1986-09-11 | 1986-10-15 | Bard Ltd | Catheter applicator |
GB2195255B (en) | 1986-09-30 | 1991-05-01 | Vacutec Uk Limited | Apparatus for vacuum treatment of an epidermal surface |
US4743232A (en) | 1986-10-06 | 1988-05-10 | The Clinipad Corporation | Package assembly for plastic film bandage |
DE3634569A1 (en) | 1986-10-10 | 1988-04-21 | Sachse Hans E | CONDOM CATHETER, A URINE TUBE CATHETER FOR PREVENTING RISING INFECTIONS |
JPS63135179A (en) * | 1986-11-26 | 1988-06-07 | 立花 俊郎 | Subcataneous drug administration set |
GB8628564D0 (en) | 1986-11-28 | 1987-01-07 | Smiths Industries Plc | Anti-foaming agent suction apparatus |
GB8706116D0 (en) | 1987-03-14 | 1987-04-15 | Smith & Nephew Ass | Adhesive dressings |
US4787888A (en) | 1987-06-01 | 1988-11-29 | University Of Connecticut | Disposable piezoelectric polymer bandage for percutaneous delivery of drugs and method for such percutaneous delivery (a) |
US4863449A (en) * | 1987-07-06 | 1989-09-05 | Hollister Incorporated | Adhesive-lined elastic condom cathether |
US5176663A (en) * | 1987-12-02 | 1993-01-05 | Pal Svedman | Dressing having pad with compressibility limiting elements |
US4906240A (en) * | 1988-02-01 | 1990-03-06 | Matrix Medica, Inc. | Adhesive-faced porous absorbent sheet and method of making same |
US4981474A (en) * | 1988-02-16 | 1991-01-01 | Baxter Travenol Laboratories, Inc. | Body fluid drainage device |
US4985019A (en) | 1988-03-11 | 1991-01-15 | Michelson Gary K | X-ray marker |
GB8812803D0 (en) | 1988-05-28 | 1988-06-29 | Smiths Industries Plc | Medico-surgical containers |
US4919654A (en) * | 1988-08-03 | 1990-04-24 | Kalt Medical Corporation | IV clamp with membrane |
US5000741A (en) | 1988-08-22 | 1991-03-19 | Kalt Medical Corporation | Transparent tracheostomy tube dressing |
DE69017479T2 (en) * | 1989-01-16 | 1995-07-13 | Roussel Uclaf | Azabicyclohepten derivatives and their salts, processes for their preparation, their use as medicaments and preparations containing them. |
GB8906100D0 (en) | 1989-03-16 | 1989-04-26 | Smith & Nephew | Laminates |
US5100396A (en) | 1989-04-03 | 1992-03-31 | Zamierowski David S | Fluidic connection system and method |
US5527293A (en) * | 1989-04-03 | 1996-06-18 | Kinetic Concepts, Inc. | Fastening system and method |
US4969880A (en) | 1989-04-03 | 1990-11-13 | Zamierowski David S | Wound dressing and treatment method |
US5261893A (en) | 1989-04-03 | 1993-11-16 | Zamierowski David S | Fastening system and method |
US5358494A (en) | 1989-07-11 | 1994-10-25 | Svedman Paul | Irrigation dressing |
JP2719671B2 (en) * | 1989-07-11 | 1998-02-25 | 日本ゼオン株式会社 | Wound dressing |
US5232453A (en) * | 1989-07-14 | 1993-08-03 | E. R. Squibb & Sons, Inc. | Catheter holder |
GB2235877A (en) | 1989-09-18 | 1991-03-20 | Antonio Talluri | Closed wound suction apparatus |
JPH03224557A (en) * | 1990-01-31 | 1991-10-03 | Daiwabou Kurieito Kk | Wound surface protective material |
US5112323A (en) * | 1990-02-08 | 1992-05-12 | Snyder Laboratories, Inc. | Wound evacuator |
US5134994A (en) | 1990-02-12 | 1992-08-04 | Say Sam L | Field aspirator in a soft pack with externally mounted container |
US5092858A (en) * | 1990-03-20 | 1992-03-03 | Becton, Dickinson And Company | Liquid gelling agent distributor device |
JP2941918B2 (en) | 1990-09-19 | 1999-08-30 | テルモ株式会社 | Weighing device |
US5149331A (en) | 1991-05-03 | 1992-09-22 | Ariel Ferdman | Method and device for wound closure |
NZ242947A (en) * | 1991-07-19 | 1994-07-26 | Johnson & Johnson Inc | Non-defiberised fluid-absorbent sheet has debonding agent and cross linked fibres and method of manufacture |
CA2073815C (en) * | 1991-07-23 | 1998-05-05 | Clemson University Research Foundation | Absorbent articles, especially catamenials, having improved fluid directionality, comfort and fit |
US5387207A (en) * | 1991-08-12 | 1995-02-07 | The Procter & Gamble Company | Thin-unit-wet absorbent foam materials for aqueous body fluids and process for making same |
US5342329A (en) * | 1991-10-11 | 1994-08-30 | Inmed Ltda. | Portable disposable device for post-surgical suction |
US5278100A (en) | 1991-11-08 | 1994-01-11 | Micron Technology, Inc. | Chemical vapor deposition technique for depositing titanium silicide on semiconductor wafers |
US5645081A (en) * | 1991-11-14 | 1997-07-08 | Wake Forest University | Method of treating tissue damage and apparatus for same |
US5636643A (en) | 1991-11-14 | 1997-06-10 | Wake Forest University | Wound treatment employing reduced pressure |
US5279550A (en) * | 1991-12-19 | 1994-01-18 | Gish Biomedical, Inc. | Orthopedic autotransfusion system |
US5167613A (en) | 1992-03-23 | 1992-12-01 | The Kendall Company | Composite vented wound dressing |
FR2690617B1 (en) | 1992-04-29 | 1994-06-24 | Cbh Textile | TRANSPARENT ADHESIVE DRESSING. |
US5556378A (en) * | 1992-06-17 | 1996-09-17 | Storz; Karl | Device for irrigation of body cavities |
DE4306478A1 (en) | 1993-03-02 | 1994-09-08 | Wolfgang Dr Wagner | Drainage device, in particular pleural drainage device, and drainage method |
US6241747B1 (en) | 1993-05-03 | 2001-06-05 | Quill Medical, Inc. | Barbed Bodily tissue connector |
US5342376A (en) * | 1993-05-03 | 1994-08-30 | Dermagraphics, Inc. | Inserting device for a barbed tissue connector |
US5344415A (en) | 1993-06-15 | 1994-09-06 | Deroyal Industries, Inc. | Sterile system for dressing vascular access site |
US5437651A (en) * | 1993-09-01 | 1995-08-01 | Research Medical, Inc. | Medical suction apparatus |
US5549584A (en) * | 1994-02-14 | 1996-08-27 | The Kendall Company | Apparatus for removing fluid from a wound |
DE4406158A1 (en) * | 1994-02-25 | 1995-08-31 | Rhein Chemie Rheinau Gmbh | Polyurethane elastomers with reduced gas permeability |
US5607388A (en) * | 1994-06-16 | 1997-03-04 | Hercules Incorporated | Multi-purpose wound dressing |
US5556375A (en) | 1994-06-16 | 1996-09-17 | Hercules Incorporated | Wound dressing having a fenestrated base layer |
US5664270A (en) | 1994-07-19 | 1997-09-09 | Kinetic Concepts, Inc. | Patient interface system |
AU698477B2 (en) | 1994-08-22 | 1998-10-29 | Kci Licensing, Inc. | Wound drainage equipment |
US20040243041A1 (en) * | 1994-10-27 | 2004-12-02 | Yimin Qin | Wound dressing |
US6228873B1 (en) * | 1994-12-09 | 2001-05-08 | The Regents Of The University Of California | Method for enhancing outflow of aqueous humor in treatment of glaucoma |
SE503779C2 (en) * | 1994-12-30 | 1996-09-02 | Moelnlycke Ab | Absorbent articles, comprising a receiving space in a storage layer, which upon wetting increases in extent perpendicular to the surface of the article and absorbent body |
DE29504378U1 (en) | 1995-03-15 | 1995-09-14 | Mtg Medizinisch Tech Geraeteba | Electronically controlled low-vacuum pump for chest and wound drainage |
DE19517699C2 (en) * | 1995-05-13 | 1999-11-04 | Wilhelm Fleischmann | Device for vacuum sealing a wound |
GB9523253D0 (en) | 1995-11-14 | 1996-01-17 | Mediscus Prod Ltd | Portable wound treatment apparatus |
JP3548651B2 (en) * | 1996-06-27 | 2004-07-28 | 積水化成品工業株式会社 | Absorber |
NL1006457C2 (en) * | 1997-07-03 | 1999-01-05 | Polymedics N V | Drainage system to be used with an open wound, element used for applying a drainage pipe or hose and method for applying the drainage system. |
US6135116A (en) | 1997-07-28 | 2000-10-24 | Kci Licensing, Inc. | Therapeutic method for treating ulcers |
AU755496B2 (en) | 1997-09-12 | 2002-12-12 | Kci Licensing, Inc. | Surgical drape and suction head for wound treatment |
GB9719520D0 (en) | 1997-09-12 | 1997-11-19 | Kci Medical Ltd | Surgical drape and suction heads for wound treatment |
US6071267A (en) * | 1998-02-06 | 2000-06-06 | Kinetic Concepts, Inc. | Medical patient fluid management interface system and method |
US6458109B1 (en) * | 1998-08-07 | 2002-10-01 | Hill-Rom Services, Inc. | Wound treatment apparatus |
JP3511577B2 (en) * | 1998-10-06 | 2004-03-29 | 株式会社日立製作所 | Throttle device for internal combustion engine |
US6488643B1 (en) | 1998-10-08 | 2002-12-03 | Kci Licensing, Inc. | Wound healing foot wrap |
US6287316B1 (en) | 1999-03-26 | 2001-09-11 | Ethicon, Inc. | Knitted surgical mesh |
US6856821B2 (en) * | 2000-05-26 | 2005-02-15 | Kci Licensing, Inc. | System for combined transcutaneous blood gas monitoring and vacuum assisted wound closure |
US7799004B2 (en) | 2001-03-05 | 2010-09-21 | Kci Licensing, Inc. | Negative pressure wound treatment apparatus and infection identification system and method |
US6991643B2 (en) * | 2000-12-20 | 2006-01-31 | Usgi Medical Inc. | Multi-barbed device for retaining tissue in apposition and methods of use |
US6800074B2 (en) | 1999-11-29 | 2004-10-05 | Hill-Rom Services, Inc. | Wound treatment apparatus |
US6764462B2 (en) * | 2000-11-29 | 2004-07-20 | Hill-Rom Services Inc. | Wound treatment apparatus |
ATE266443T1 (en) | 2000-02-24 | 2004-05-15 | Venetec Int Inc | UNIVERSAL CATHETER FASTENING SYSTEM |
DE60109026T2 (en) | 2000-03-21 | 2006-02-09 | Kimberly-Clark Worldwide, Inc., Neenah | PERMANENT WATERBANDABLE HIGH ABSORPTION FIBERS |
GB0011202D0 (en) * | 2000-05-09 | 2000-06-28 | Kci Licensing Inc | Abdominal wound dressing |
US6903243B1 (en) * | 2000-09-08 | 2005-06-07 | 3M Innovative Properties Company | Multi-layer absorbent wound dressing |
US6685681B2 (en) | 2000-11-29 | 2004-02-03 | Hill-Rom Services, Inc. | Vacuum therapy and cleansing dressing for wounds |
US6855135B2 (en) * | 2000-11-29 | 2005-02-15 | Hill-Rom Services, Inc. | Vacuum therapy and cleansing dressing for wounds |
US7070584B2 (en) * | 2001-02-20 | 2006-07-04 | Kci Licensing, Inc. | Biocompatible wound dressing |
US7700819B2 (en) * | 2001-02-16 | 2010-04-20 | Kci Licensing, Inc. | Biocompatible wound dressing |
US6540705B2 (en) * | 2001-02-22 | 2003-04-01 | Core Products International, Inc. | Ankle brace providing upper and lower ankle adjustment |
WO2002083046A1 (en) | 2001-04-16 | 2002-10-24 | Pamela Howard | Wound dressing system |
US7108683B2 (en) | 2001-04-30 | 2006-09-19 | Kci Licensing, Inc | Wound therapy and tissue management system and method with fluid differentiation |
GB2382305B (en) | 2001-11-23 | 2004-12-15 | Johnson & Johnson Medical Ltd | Absorbent wound dressings containing a hydrogel layer |
US8168848B2 (en) | 2002-04-10 | 2012-05-01 | KCI Medical Resources, Inc. | Access openings in vacuum bandage |
US7846141B2 (en) | 2002-09-03 | 2010-12-07 | Bluesky Medical Group Incorporated | Reduced pressure treatment system |
US6979324B2 (en) * | 2002-09-13 | 2005-12-27 | Neogen Technologies, Inc. | Closed wound drainage system |
US7520872B2 (en) | 2002-09-13 | 2009-04-21 | Neogen Technologies, Inc. | Closed wound drainage system |
US7815616B2 (en) * | 2002-09-16 | 2010-10-19 | Boehringer Technologies, L.P. | Device for treating a wound |
GB0224986D0 (en) | 2002-10-28 | 2002-12-04 | Smith & Nephew | Apparatus |
US6951553B2 (en) | 2002-12-31 | 2005-10-04 | Kci Licensing, Inc | Tissue closure treatment system and method with externally-applied patient interface |
US7976519B2 (en) | 2002-12-31 | 2011-07-12 | Kci Licensing, Inc. | Externally-applied patient interface system and method |
US8444611B2 (en) * | 2003-07-22 | 2013-05-21 | Kci Licensing, Inc. | Negative pressure wound treatment dressing |
GB0325126D0 (en) | 2003-10-28 | 2003-12-03 | Smith & Nephew | Apparatus with heat |
GB0325120D0 (en) | 2003-10-28 | 2003-12-03 | Smith & Nephew | Apparatus with actives |
US7909805B2 (en) | 2004-04-05 | 2011-03-22 | Bluesky Medical Group Incorporated | Flexible reduced pressure treatment appliance |
US8062272B2 (en) | 2004-05-21 | 2011-11-22 | Bluesky Medical Group Incorporated | Flexible reduced pressure treatment appliance |
US8529548B2 (en) | 2004-04-27 | 2013-09-10 | Smith & Nephew Plc | Wound treatment apparatus and method |
GB0409293D0 (en) | 2004-04-27 | 2004-06-02 | Smith & Nephew | Apparatus with flow stress |
GB2415382A (en) * | 2004-06-21 | 2005-12-28 | Johnson & Johnson Medical Ltd | Wound dressings for vacuum therapy |
DE202004018245U1 (en) * | 2004-11-24 | 2005-07-07 | Riesinger, Birgit | Drainage device for treating wounds using reduced pressure has absorption body with layer(s) of textile section enriched with super-absorbents enclosed by liquid transmissive sleeve; absorbed wound secretions remain in absorption body |
DE102005007016A1 (en) * | 2005-02-15 | 2006-08-24 | Fleischmann, Wilhelm, Dr.med. | Device for the treatment of wounds |
WO2006127905A2 (en) | 2005-05-24 | 2006-11-30 | Chrono Therapeutics, Inc. | Portable drug delivery device |
JP3784823B1 (en) * | 2005-07-15 | 2006-06-14 | 国立大学法人徳島大学 | Distance measuring device, distance measuring method, and distance measuring program |
US20070027414A1 (en) * | 2005-07-28 | 2007-02-01 | Integra Lifesciences Corporation | Laminar construction negative pressure wound dressing including bioabsorbable material |
CN101257875A (en) * | 2005-09-06 | 2008-09-03 | 泰科保健集团有限合伙公司 | Self contained wound dressing with micropump |
US20070135787A1 (en) * | 2005-12-14 | 2007-06-14 | Maria Raidel | Extensible absorbent layer and absorbent article |
AU2007212488B2 (en) * | 2006-02-07 | 2012-07-12 | Smith & Nephew Inc. | Surgical wound dressing |
US20070235038A1 (en) * | 2006-04-11 | 2007-10-11 | Lone Star Medical Products, Inc. | Surgical system |
US7615036B2 (en) | 2006-05-11 | 2009-11-10 | Kalypto Medical, Inc. | Device and method for wound therapy |
US7779625B2 (en) * | 2006-05-11 | 2010-08-24 | Kalypto Medical, Inc. | Device and method for wound therapy |
US20090326488A1 (en) * | 2006-07-24 | 2009-12-31 | Klaus Budig | Canister, Suction Device and System For Vacuum Treatment Securing a Fixed Treatment Pressure |
SE0602064L (en) * | 2006-10-03 | 2008-04-04 | Moelnlycke Health Care Ab | Wound dressing with pressure distributing hose inlet |
JP4939903B2 (en) * | 2006-11-07 | 2012-05-30 | 白十字株式会社 | Wound dressing |
EP3527235A1 (en) * | 2007-02-09 | 2019-08-21 | KCI Licensing, Inc. | System for managing reduced pressure at a tissue site |
WO2008104609A1 (en) * | 2007-03-01 | 2008-09-04 | Coloplast A/S | Pressure-distributing elements for use with negative pressure therapy |
SE531259C2 (en) * | 2007-06-27 | 2009-02-03 | Moelnlycke Health Care Ab | Device for treating reduced pressure ulcers |
EP2214612B1 (en) | 2007-11-21 | 2019-05-01 | Smith & Nephew PLC | Wound dressing |
CN101868203B (en) * | 2007-11-21 | 2014-10-22 | 史密夫及内修公开有限公司 | Wound dressing |
US8372049B2 (en) | 2008-03-05 | 2013-02-12 | Kci Licensing, Inc. | Dressing and method for applying reduced pressure to and collecting and storing fluid from a tissue site |
US8021347B2 (en) | 2008-07-21 | 2011-09-20 | Tyco Healthcare Group Lp | Thin film wound dressing |
US8007481B2 (en) | 2008-07-17 | 2011-08-30 | Tyco Healthcare Group Lp | Subatmospheric pressure mechanism for wound therapy system |
US8251979B2 (en) | 2009-05-11 | 2012-08-28 | Tyco Healthcare Group Lp | Orientation independent canister for a negative pressure wound therapy device |
US8216198B2 (en) | 2009-01-09 | 2012-07-10 | Tyco Healthcare Group Lp | Canister for receiving wound exudate in a negative pressure therapy system |
EP2586408B8 (en) * | 2008-09-18 | 2017-08-23 | KCI Licensing, Inc. | Dressings and systems for applying reduced pressure at a tissue site |
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