WO1997016094A1 - Patient support mattress - Google Patents
Patient support mattress Download PDFInfo
- Publication number
- WO1997016094A1 WO1997016094A1 PCT/GB1996/002672 GB9602672W WO9716094A1 WO 1997016094 A1 WO1997016094 A1 WO 1997016094A1 GB 9602672 W GB9602672 W GB 9602672W WO 9716094 A1 WO9716094 A1 WO 9716094A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mattress
- body contact
- mattress according
- contact surface
- sections
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/05—Parts, details or accessories of beds
- A61G7/057—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor
- A61G7/05769—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with inflatable chambers
- A61G7/05776—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with inflatable chambers with at least two groups of alternately inflated chambers
Definitions
- the present invention relates to patient support mattresses of the static pressure, alternating pressure and low air loss type.
- Alternating pressure type air beds are to be found described in GB-A-1595417. Briefly this document describes an air bed for patient support, for example in a burns unit or in geriatric care, which comprises a plurality of overlying flexible pressure resistant tubes which are inflated and deflated in an alternating cycle over about 5 to 10 minutes. The purpose of this is to reduce the period of time that an immobile body tissue carries weight which could shut off or reduce blood flow. Thus every five minutes or so every skin tissue is unstressed by weight and hence where blood flow is weak the capillary system can operate to oxygenate the unstressed tissue.
- a static pressure air filled mattress is provided in another type of fluid filled mattress.
- the mattress is valved so that the pressure can be adjusted to a desired value when the patient is in situ on the mattress.
- a patient support mattress comprising a substantially flat body contact surface formed from a plurality of discrete fluid filled sections; characterised in that the number of sections per unit area of body contact surface is varied at different portions thereof in accordance with the loading characteristic of a body part to be supported there.
- the number of sections per unit area of body contact surface is varied at different positions along the length of the mattress.
- the number of sections per unit area of body contact surface is relatively increased for portions supporting body parts such as limbs having smaller contact areas and/or smaller radius of curvature.
- the number of sections per unit area of body contact surface is relatively increased, whereas for limbs such as the trochanter (the hip area) or the sacrum (the lower back area) , the number of sections per unit area of body contact surface may be relatively decreased.
- each fluid filled section has an arcuate cross- section at the body contact surface, the sections which in use are for supporting body parts having smaller contact areas, having smaller effective radii.
- the radius of such arcuate cross-sectioned sections is preferably made to correspond closely with the radius of curvature of the body part to be supported thereby.
- each fluid filled section is filled with a gas, liquid, gel or low friction powder and is connected to a source of pressurization.
- the fluid filled sections may optionally be connected to a means for alteration of their internal pressure on a cyclical basis.
- the body contact surface comprises a plurality of adjacent tubes, each arranged at right angles to a longitudinal direction of the mattress.
- the upper arcuate surfaces of such tubes are therefore presented to the patient, although alternative non-arcuate tubular shapes may be used where suitable.
- portions of the mattress having a higher relative number of sections per unit area of body contact surface comprise at least one bifurcated or trifurcated tube.
- each tube comprises an elongated sac having a substantially arcuate body contact part, a lower support surface and an intermediate section which is not substantially longitudinally extensible.
- a plurality of discrete transverse supports are provided between internal sides of the intermediate section. These limit the deformation of the body contact part and lower support surface.
- each sac is pleated or ruffled along its length.
- the mattress is particularly directed to alleviating hammocking.
- pleating Whilst pleating is conveniently disposed perpendicular to the length of the sac, it may of course, also be longitudinal of its axial length, or angled to the axis of the sac.
- pleated as used herein includes the term ruffled.
- sacs in accordance with the present invention may still be used.
- Particularly suited to such an embodiment are effectively single celled elongate air sacs provided with upper body contact and lower support, surfaces, especially those in which the upper contact surface is in cross-section bifurcated or trifurcated.
- the pleat/ruffle ratio of the body contact part is between 1:1.57 to 1:2.5.
- the lower support surface may be pleated along its length, and in a preferred embodiment is pleated only over a central section of about to V4 the axial length.
- the pleat/ruffle ratio of the lower support surface may be 1:2.0 to 1:3.0, preferably about 1:2.5.
- the sides of the intermediate section may provide a continuous or partially discontinuous member to which the pleats of the body contact part may be secured.
- a non-extensible member may be provided in the form of a string or cord. It is preferable that such a non- extensible member, when used, should be positioned within the sac as far as possible from the body contact surface to avoid uncomfortable contact with the patient.
- the body contact part of each sac is orientated such that its vertical axis is normal to the body contact surface of the mattress.
- the sacs may thus be arranged so that the sides thereof are also generally normal to the body contact surface of the mattress. In this manner, the centre of body contact part arcuate surface is presented for first contact with a body part of a patient.
- one or more sacs are arranged so that the vertical axis of their body contact part is inclined with respect to the body contact surface of the mattress.
- Such sacs may be provided at a portion of the body support surface where a patient is likely to load the mattress when seated.
- the vertical axis is conveniently inclined at a 45° in such sacs.
- each sac is formed of a pressure retaining flexible material adapted to be air filled under pressure.
- the material may be arranged to seep air.
- Each sac is preferably provided with areas for retaining the same in position, for example, a reinforced ring through which a securing cord may pass.
- Each sac may be fabricated from any flexible and/or resilient material, for example, polyurethane or PVC or a fabric supported polyurethane.
- the pleats may be stuck and/or sewn or vacuum formed and then welded as appropriate.
- the pleats or ruffles may be formed by causing relative expansion of the body contact part or relative reduction in axial length of the intermediate section, when an intermediate section is used.
- the sac may be formed as a preform and inserted into a heated mould.
- the preformed sac is filled with air or an inert gas and heat is then applied differentially such that the body contact part is heated to a significantly higher value than the support surface.
- the body contact part With the positive air pressure within the formed sac but with the support surface retained by the mould, and since the temperature of the body contact part is locally raised above the thermoplastic threshold of the material used, the body contact part will deform non-elastically to form pleats and/or ruffles.
- vacuum forming may be used to achieve this end.
- a cover for a mattress may be provided, the cover comprising a central ruffled/pleated section for receiving a patient.
- Figure 2 shows a side cross-sectional view of the mattress of Figure 1;
- FIGS 3 to 5 show side cross-sectional views of alternative embodiments of the present invention.
- Figure 6 shows a cover for use with the mattress of Figure 1.
- this shows a mattress 1 made up of a plurality of tubular members or sacs 2, formed from a flexible and/or resilient material, for example, polyurethane or PVC or a fabric supported polyurethane.
- the tubular members are arranged to lie adjacent one another in abutting relationship.
- Each tubular member comprises an arcuate body contact part 5, and intermediate section 6 and a support surface 7.
- the tubular members are housed at each of their ends in a discrete box section 3, such box sections ensuring the general shape of the mattress in maintained.
- the box sections may be formed from fabric or any alternative suitable material.
- the tubular members 2 are arranged to be air filled, although alternative fillers may comprise any suitable gas, liquid, gel or low friction powder. They are connected to a means for alteration of their internal pressure on a cyclical basis (not shown) .
- the mattress has a body contact surface formed by the upper portions of the tubular members 2.
- This surface is itself divided into different longitudinal areas, shown generally as D, N, and S, although it will be appreciated that longitudinally or transversely separated areas may be provided.
- area D the foot or heel area
- the body contact part 5 of the tubular members 2 is bifurcated so that in effect each tubular member in this area presents two initial contact points or areas 15.
- the "ear" portions thus formed may be ruffled or pleated in their longitudinal direction or not depending upon the eventual use thereof.
- two "ear” portions are formed from a single tubular member by tensioning a central area of the body contact part using a cord 17 attached to a button 18 supported by a transverse support 4.
- a cord 17 attached to a button 18 supported by a transverse support 4.
- a transverse support 4 Of course alternative suitable arrangements may be used.
- varying the number of sections per unit area of body contact surface may be by any suitable arrangement, as for example shown in Figures 3 to 5.
- the difference in numbers of sections per unit area of body contact surface may be provided simply by having different sized tubular members 2.
- Alternative arrangements for supporting the tubular members 2 are also indicated in Figures 3 to 5.
- "bubble pad” arrangements may be used particularly for areas of the mattress where the number of sections per unit area is relatively high.
- each tubular member is configured into a series of connected circular portions, that become hump-like when inflated. The arcuate side profiles or adjacent such tubes are arranged to interfit.
- the tubular members are not bifurcated so that only a single initial contact point or area 15 is presented for each tubular member.
- the tubular members 2 are inclined with respect to the body contact surface at 45°.
- the body contact part 5 of each sac is thus orientated such that its vertical or major axis is inclined with respect to the body contact surface of the mattress.
- the tubular members 2 in area S are directed specifically for dealing with the load characteristics presented by the sacral ischial region of the patient.
- the mattress extends with upright tubular members 2 associated with area N of the mattress.
- straps 16 are used at strategic places.
- a plurality of transverse supports 4 are provided between the sides of the intermediate section. These limit the arcuate deformation of the body contact surface and the support surface. Further support 4' may be provided to enhance this effect, particularly of the support surface.
- each tubular member is pleated or ruffled along its length.
- the pleating 8 is shown disposed generally perpendicular to the length of the tubular members, but of course, may also be longitudinal of its axial length, or angled to its axis.
- the term pleated as used herein includes the term ruffled.
- the pleats may be stuck and/or sewn or vacuum formed and then welded as appropriate.
- the pleats or ruffles may be formed by causing relative expansion of the body contact portion or relative reduction in axial length of the intermediate section when the intermediate section is used.
- the sac may be formed as a preform and inserted into a heated mould.
- the preformed sac is filled with air or an inert gas and heat is then applied differentially such that the body contact part is heated to a significantly higher value than the support surface.
- the body contact part With the positive air pressure within the formed sac but with the support surface retained by the mould, and since the temperature of the body contact part is locally raised above the thermoplastic threshold of the material used, the body contact part will deform non-elastically to form pleats and/or ruffles.
- vacuum forming may be used.
- the intermediate section 6 is continuous or at least partially discontinuous and provides a member to which the pleats may be secured.
- a non-extensible member may be provided in the form of a string or cord (not shown) .
- a string or cord should terminate in shaped end plates which allow the same to exert a longitudinal compressive force.
- the pleat/ruffle ratio of the upper body contact parts is between 1:1.57 to 1:2.5.
- the support portion may be pleated along its length, but is preferably pleated only over a central section of about to 1 4 the axial length.
- the pleat/ruffle ratio of the support portion is 1:2.0 to 1:3.0, preferably about 1:2.5.
- each sac is preferably provided with areas for retaining the same in position, for example, a reinforced ring 10 through which a securing cord 11 may pass.
- the cords 11 are attached to battens 12 through a wedge shaped supporting foam structure 14.
- a cover 19 may be provided which includes a ruffled centre section 20 on which a patient will predominantly lie. The ruffled section assists to improve the pressure signature for a patient lying thereon.
- the cover may be used with conventional mattresses.
- the heels and the ischial/sacral region are chosen for investigation as they represent a comparatively light yet bony area in the case of the heel whereas the sacrum/ischial tuberosities when semi-recumbent have an area which has considerable loading over a much larger surface. Therefore in making measurements at these sites, the performance of the mattress to a variety of loading patents can be assessed.
- the trochanter is chosen and is often considered one of the most difficult areas in which to achieve satisfactory pressure relief.
- the subjects used in this evaluation were all members of Salisbury Hospital Retirement Fellowship and hence have an average age of over 70 years. All are ambulant and in good health. None have any current sores or a history of pressure sores. During the tests they all wear standard night wear or loose fitting underclothes. A single sheet is placed over each mattress. It is not tucked in but left to lie loose, all wrinkles being smoothed out.
- the back rest is left at 45° and the mattress is placed over the top of the back rest.
- Two pillows are used to support the head.
- the beds are flat with the subjects' heads being supported on two pillows. Both hip and knee angles are at 60° by using specially constructed foam templates.
- the 3*4 sensor arrays are taped to the skin over the sacrum and over both ischials with the subject standing with the hips flexed at 45° in a similar position to that which they will adopt on the bed during the tests. Care is taken to ensure that there is no tape across the surface of any of the pressure elements. The subject is then carefully transferred onto the bed and the bed is checked to ensure none of the sensors are creased or folded.
- the senor is then inspected and any creases removed and the pressure is remeasured.
- the subject then remains stationary on the bed for two complete cycles so the bed can adjust to the weight of the subject.
- the readings are then taken in two complete cycles for the sacrum and one complete cycle for the ischial tuberosities.
- the maximum, minimum and average pressures measured over one or two cycles is then printed out using a programming facility. Foot blocks are adjusted to ensure that the patient does not slide down the bed during tests.
- Pressures are measured on the heels using individual cells connected to a standardized computer.
- One sensor is taped to each heel over the point of maximum pressure and the heel is positioned on the ridge of the mattress with the foot held vertically.
- the block or board used to prevent the subject from slipping down the bed in the sacral readings is not used as false readings can occur due to some pressure being taken on the soles of the feet.
- the block or board is used as an indicator to observe if the subject slips down the bed. Readings on both heels simultaneously on two complete cycles. Again the maximum, minimum and average pressures are recorded. The head is supported on two pillows and the subject is left in the position of two complete cycles during which time measurements are taken to ensure the sensor is lying correctly before the actual readings are taken again over two cycles. Maximum, minimum and average pressure readings are then recorded.
- Negative pressures correspond to a reduction in pressure and positive values and relate to an increase in pressure compared to the standard hospital mattress values of which are given in Table I.
- the air mattress in accordance with the present invention provides improved comparative pressure signatures throughout the range of pressures points. This is particularly so with reference to the heel area shown as "D" in Figure 2 which shows a higher average value for the heel area.
- the invention provides therefore a novel patient support mattress.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96935142A EP0868134A1 (en) | 1995-10-31 | 1996-10-31 | Patient support mattress |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9522208.9 | 1995-10-31 | ||
GB9522208A GB2306314B (en) | 1995-10-31 | 1995-10-31 | Patient support mattress |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997016094A1 true WO1997016094A1 (en) | 1997-05-09 |
Family
ID=10783109
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1996/002672 WO1997016094A1 (en) | 1995-10-31 | 1996-10-31 | Patient support mattress |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0868134A1 (en) |
GB (1) | GB2306314B (en) |
WO (1) | WO1997016094A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2917278A1 (en) * | 2007-06-18 | 2008-12-19 | Hill Rom Ind S A Sa | MATTRESS-TYPE SUPPORT DEVICE HAVING A HETEROGENEUS INFLATABLE STRUCTURE |
DE102009019481A1 (en) * | 2009-05-04 | 2010-11-11 | Siemens Aktiengesellschaft | Lying device and method for supporting care of a person lying down |
GB2472818A (en) * | 2009-08-19 | 2011-02-23 | Mjs Healthcare Ltd | A support with inflatable cells wherein the cells at one end have a smaller diameter |
US9655795B2 (en) * | 2012-04-10 | 2017-05-23 | Hill-Rom Services, Inc. | Occupant support with a migration sensitive bladder and method for migration detection |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0226699A2 (en) * | 1985-12-20 | 1987-07-01 | rokado-Metall-Holz-Kunststoff GmbH & Co. KG | Water-bed |
US4745647A (en) * | 1985-12-30 | 1988-05-24 | Ssi Medical Services, Inc. | Patient support structure |
US4768249A (en) * | 1985-12-30 | 1988-09-06 | Ssi Medical Services, Inc. | Patient support structure |
GB2224644A (en) * | 1988-03-23 | 1990-05-16 | Chiou Golong | Water-bed |
WO1990007891A1 (en) * | 1989-01-23 | 1990-07-26 | Afeyan Industries Inc. | Air mattress |
US5090077A (en) * | 1991-01-07 | 1992-02-25 | Health Products, Inc. | Cellular patient support for therapeutic air beds |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA901185A (en) * | 1969-01-09 | 1972-05-23 | P. Nail Walter | Inflatable load supporting structures |
US4267611A (en) * | 1979-03-08 | 1981-05-19 | Arnold Agulnick | Inflatable massaging and cooling mattress |
NL8302733A (en) * | 1983-08-02 | 1985-03-01 | Auping Bv | BODY SUPPORT LIKE A MATTRESS. |
GB8926920D0 (en) * | 1989-11-29 | 1990-01-17 | Barry Thomas | Inflatable body supports and splints |
US5704084A (en) * | 1993-12-06 | 1998-01-06 | Talley Group Limited | Inflatable mattresses |
US5586346A (en) * | 1994-02-15 | 1996-12-24 | Support Systems, International | Method and apparatus for supporting and for supplying therapy to a patient |
-
1995
- 1995-10-31 GB GB9522208A patent/GB2306314B/en not_active Expired - Fee Related
-
1996
- 1996-10-31 WO PCT/GB1996/002672 patent/WO1997016094A1/en not_active Application Discontinuation
- 1996-10-31 EP EP96935142A patent/EP0868134A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0226699A2 (en) * | 1985-12-20 | 1987-07-01 | rokado-Metall-Holz-Kunststoff GmbH & Co. KG | Water-bed |
US4745647A (en) * | 1985-12-30 | 1988-05-24 | Ssi Medical Services, Inc. | Patient support structure |
US4768249A (en) * | 1985-12-30 | 1988-09-06 | Ssi Medical Services, Inc. | Patient support structure |
GB2224644A (en) * | 1988-03-23 | 1990-05-16 | Chiou Golong | Water-bed |
WO1990007891A1 (en) * | 1989-01-23 | 1990-07-26 | Afeyan Industries Inc. | Air mattress |
US5090077A (en) * | 1991-01-07 | 1992-02-25 | Health Products, Inc. | Cellular patient support for therapeutic air beds |
Also Published As
Publication number | Publication date |
---|---|
EP0868134A1 (en) | 1998-10-07 |
GB2306314B (en) | 1999-11-17 |
GB2306314A (en) | 1997-05-07 |
GB9522208D0 (en) | 1996-01-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9750655B2 (en) | Conformable support system | |
US5476105A (en) | Abduction pillow for orthopedic support | |
US4685163A (en) | Recliner for medical convalescence | |
US8429774B2 (en) | Lateral tilt device | |
JP2521131B2 (en) | Air mattress | |
CA1077173A (en) | Fluid mattresses | |
US6739001B2 (en) | Cushioning device including a restraint structure | |
US4639960A (en) | Recliner for medical convalescence | |
US5619764A (en) | Mattress for decubitus prophylaxis | |
CA1323810C (en) | Alternating pressure pad | |
EP0686385A2 (en) | Inflatable supports | |
PT94342A (en) | CONTROL OF AIR INFLATION INFLATION | |
CN114867443B (en) | patient transfer mattress | |
CA2273623C (en) | Air mat | |
CA2892048A1 (en) | Adjustable support system | |
US20220347027A1 (en) | Devices and Methods to Help Prevent Decubitus Ulcers | |
US5357641A (en) | Patient positioners for use on oscillating air support surfaces | |
US5970548A (en) | Pleated sac for patient support mattress | |
US20100281619A1 (en) | Air mattress system with inflatable limb chamber | |
Rithalia et al. | Assessment of alternating air mattresses using a time-based interface pressure threshold technique | |
EP0868134A1 (en) | Patient support mattress | |
WO2014080196A2 (en) | Mattress arrangement | |
EP0306881A1 (en) | Inflatable cushion | |
CN211674978U (en) | Isobaric nursing sickbed | |
TWI681741B (en) | Two-in-one mattress with air mattress and memory form for patient care |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CA JP US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1996935142 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: JP Ref document number: 97517156 Format of ref document f/p: F |
|
WWP | Wipo information: published in national office |
Ref document number: 1996935142 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: CA |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1996935142 Country of ref document: EP |