CA2666744A1 - Infusion set - Google Patents

Infusion set Download PDF

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Publication number
CA2666744A1
CA2666744A1 CA002666744A CA2666744A CA2666744A1 CA 2666744 A1 CA2666744 A1 CA 2666744A1 CA 002666744 A CA002666744 A CA 002666744A CA 2666744 A CA2666744 A CA 2666744A CA 2666744 A1 CA2666744 A1 CA 2666744A1
Authority
CA
Canada
Prior art keywords
connector
infusion
infusion set
set according
retention devices
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA002666744A
Other languages
French (fr)
Inventor
Henrik Tipsmark
Jens Egebjerg Nielsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unomedical AS
Original Assignee
Unomedical A/S
Henrik Tipsmark
Jens Egebjerg Nielsen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Unomedical A/S, Henrik Tipsmark, Jens Egebjerg Nielsen filed Critical Unomedical A/S
Publication of CA2666744A1 publication Critical patent/CA2666744A1/en
Abandoned legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/10Tube connectors; Tube couplings
    • A61M39/1011Locking means for securing connection; Additional tamper safeties
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/02Holding devices, e.g. on the body
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/10Tube connectors; Tube couplings
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/158Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/158Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
    • A61M2005/1581Right-angle needle-type devices
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/158Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
    • A61M2005/1587Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body suitable for being connected to an infusion line after insertion into a patient
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/02Holding devices, e.g. on the body
    • A61M2025/028Holding devices, e.g. on the body having a mainly rigid support structure

Abstract

The application relates to an infusion set comprising an infusion part (1) comprising a base part (3) having a main plane, a head part (6) extending from the main plane of the base part and a cannula (12) extending from the base part, first fastening means, a connector (2) having a plane being parallel to and above the main piano of the base part, and having one or more arms (15), said arms being fastened to the connector at a first end, and being free in a second opposite end, and a tube (14), guide means (7, 16) second fastening means (8, 17) being in the form of projecting connector retention devices (17) positioned on the arms of the connector adapted to engage with retention devices (8) extending from the base part, where the plane of the connector can be tilted to a distance from the base part causing the second to be displaced to a distance from that is larger than the height (h) of the retention devices.

Description

INFUSION SET

Field of invention The invention relates to an infusion set for an intermittent or continuous administration of a therapeutic substance, such as insulin. Further the invention relates to a kit comprising an injector device and an infusion set.

An infusion set comprises an infusion part with a cannula to penetrate the skin of a person and a connector for connecting the infusion part with a medical device, preferably a medical device such as an insulin pump. An infusion set has in its assembled form a substantially planar rear side and a relatively large width compared to its thickness, thus allowing it to lie flat on the patient's skin and thereby minimizing the discomfort of carrying the infusion set.

The infusion part is placed stationary on the patient for a longer and not specified period of time while the connector is supposed to be connected and disconnected from time to time. Hereby it is possible for the patient to disconnect from a medical device such as a pump connected to a reservoir of medication, move around and at a later point re-connect to the medicai device. Further it is possible to shift between different medical devices e.g.
different reservoirs of medication, using the same infusion part and only requirering one penetration of the skin and providing less discomfort to the patient.

Some people are reluctant or hesitant to pierce their own skin with a medical needle, and thus encounter difficulties in correct needle or cannula placement for proper administration of the medication. Therefore it is possible to use an injector device for the placement of the infusion set into the skin of a patient.

~
CONFIRMATION COPY

Background of the invention W02005/092410A1 describes an infusion set for intermittent or continuous administration.of a therapeutically substance, such as insulin, comprising an infusion part for insertion into a patient and a connector for connecting the infusion part with a medical device through a tube, the connector being axially displaceable relative to the infusion part. The infusion part comprises an adhesive support, a base part with a first set of guiding means and at least two retention devices for locking the connector to the infusion part, a cannula extending from said base part and being in fluid communication with a cavity. The cavity is further adapted to receive a second cannula extending from the connector, which second cannula is in fluid communication with the tube. The connector also comprises at least two arms comprising means corresponding to the retention devices extending from the base part.

The coupling mechanism between the infusion part and the connector of this infusion set is quite strong when the arms are in a locked position The risk/chance of pulling the connector away from the infusion part when positioned on the skin of the patient is negligible for this known infusion set, as the device has front-facing arms and corresponding retention devices.
When a patient accidentally pulls or overloads the tube extending from the infusion set via the connector by pulling the tube in an upward direction, this results in the connector being tilted relative to the infusion part thereby tightening the engagement between the retention devices on the infusion part and the corresponding retention devices on the two arms of the connector.
In this way, the strong coupling mechanism between the connector and the infusion part will result in both the connector and the infusion part not being able to disconnect from each other when the connector or the tube of the connector is being overloaded or pulled in an upward direction but resulting in the whole infusion set being pulled out of the patient's skin. The patient will then have to re-inject a new infusion set with the resulting discomfort.
Hccoraingiy, it is an object of the invention to provide an infusion set having a coupling mechanism between the infusion part and the connector which -coupling mechanism separates the connector from the infusion part when the infusion set is being exposed to overload or accidental pulling of the tube extending from the connector.

It iS an-pthPr nhA =t nf the inventinn to nrczvide3n_ infusion GPt wj#h-a-clear_ view of the insertion site.

Summary of the invention In a first aspect the present invention relates to an infusion set for intermittent administration of a therapeutically substance through the skin of a patient, comprising an infusion part having a base part with a main plane, a head part extending from the main plane of the base part and having a cannula extending from the base part into the skin of a patient, first fastening means -for-fastening the-infusion--par-t-to-the-skin-of-a-patient,-a--connector having a plane being parallel to and above the main plane of the base part, and having one or more arms, said arms being fastened to the connector at a first end, and being free in a second opposite end, and a tube for connecting the infusion set to a medical device, guide means for positioning the infusion part and the connector in relation to each other, second fastening means for fastening the connector to.the infusion part, the second fastening means being in the form of connector retention devices positioned on the arms of the connector adapted to engage with corresponding retention devices extending from the base part, wherein the plane of the connector can be tilted to a distance from the base plate, causing the second end to be displaced to a distance that is larger than the height of the retention devices, said retention devices being positioned in the second end of the base part, when the connector is positioned via the guide means relative to the infusion part.
Further, the connector is pivotable at the first end when position in the guide means around an axis, said axis being parallel to the main plane of the base part-and perpendicular-to-a-lon-gitudinal axis-A ofithe infusion part:It has surprisingly been shown, that the above described infusion set will seem safer to use for the patient than the previously known infusion sets as the infusion nart, when thP force for disr.onnP . ing thec:onllpCtor fro.m-#he infusion part is less than the force for removing the infusion part from the skin of a patient, will disconnect from the connector, when the connector is being pushed or pulled away in an inclined motion from the infusion part e.g. by an accidental pull of the tube.

Furthermore, the infusion set can be constructed for an inclined insert, where the cannula can extend from the first end of the base part or head part essentially along a longitudinal axis A or slightly angled in relation to the axis A; in-or-der-to--pr'ovid-e the-patient with-an-infusion-set with-an-inclined--insert-in a manner known per se. The infusion set can also be constructed for an insert perpendicular to the skin surface, when mounted into the skin of a patient, where the cannula extends from a lower surface of the base part and perpendicular to said base part.

When the infusion set is positioned on the skin of a patient, . e.g.
perpendicular to the skin surface of the patient, the infusion set covers the needle insertion site. In order to get a clear view of the insertion site without removing the infusion part, the head part extending from the base part of the infusion part can be provided with a see-through part. This see-through part can be formed in various ways such as by casting the head part in a tr-anspar.ent_polypr_opylene, by_reducing the_thickness._of_the-head_part or by providing the head part with a magnifying area and the like.

This ensures a good and clear view of the insertion site whereby it is possible to check the insertion site including that the insertion site is clean and not -infected together-with-the cannala-being positioned into the skin of the patient in the right position.

In a second aspect the invention relates to a kit comprising an injector device and an infusinn set ac or ingto thp invention where the injactor d~Vice comprises a housing, a plunger slidably received within the housing for movement between an advanced position and a retracted position, the plunger having substantially non-detachably secured thereto an insertion needle for receiving and supporting the cannula of the subcutaneous infusion set in a position with the cannula, where the insertion needle is removable from the cannula while maintaining a transcutaneous placement of the cannula, a drive for urging the plunger from the retracted position toward the advanced position to transcutaneously place said cannula of the -s-ubcutaneous-infusion-set r-eeeived-on-the insertion-needle. The above mentioned kit is designed to place the cannula of the infusion set with the insertion needle extending there through to ensure proper needle placement with minimal patient discomfort. The injector device may also allow placement of the insertion needle through the skin at a selected insertion angle. After priming and placement of the infusion set the injector device is removed and delivery of medication is initiated. The kit comprising the injector device and the infusion set is normally provided to the patient as a sterile sealed single use assembly.

Brief description of the drawings _In the_following_the_.invention_will. b.e described in further details with reference to the accompanying drawings.

Figure 1 shows an embodiment of an infusion set where the infusion part and the connector are unified.
~ Figure 2 shows -an end -view-of-the- -same embodiment--of an infusion set shown in figure 1.
Figure 3 shows a side view of the same embodiment of an infusion set shown in figure 1.
Fs~IIrP 4 sflowG a top view of_ thes,a_me PmhodimPnt nf n inf~~~iol~set ShQwn in figure 1.
Figure 5 shows an embodiment of the infusion set where the infusion part and the connector are separated.
Figure 6 shows a side view of the same embodiment of an infusion set shown in figure 5.
Figure 7 shows a top view of the same embodiment of an infusion set shown in figure 5.
Figure 8 shows different shapes of retention devices on the base part.
-Figu r-e-8a-shaws---d-ifFer-ent-s-hapes-of-eonnector-r-etention-devices-on-the connector.
Figure 9 shows an embodiment of the injector device for use with the infusion set according to the invention.

Detailed description The invention is explained more in detail with reference to the drawings showing an embodiment of the invention.

Infusion set Figure 1-7 illustrates an embodiment of an infusion set for intermittent administration of a therapeutically substance through the skin of a patient, where the infusion set comprises an infusion part 1 and a connector 2 for -connecting_the_infusion_ part_ 1_with_a _r.rmedical._device (not shown) through a tube 14 extending through an opening 19 in the connector 2, as can be seen in figure 2. The connector 2 and the infusion part I is having a longitudinal axis A, said connector 2 being axially displaceable along said longitudinal axis A relative to the infusion part 1.

Infusion part As can most clearly be seen in figures 5-7, the infusion part 1 comprises a base part 3 with a main plane being essentially parallel,to the skin'of the pa.ti.e-nt, when the infusinn set is attac:heõd tn a_patiPntYsaidbas.e part hav_ing a first surface 10 and a second surface 11, the second surface 11 being closest to the skin of a patient and being provided with a first fastening means for fastening the infusion part 1 to the skin of a patient and a head part 6 extending from the first surface, i.e. the main plane, of the base part 3, said head part 6 having a cannula 12 extending from the base part 3.into the skin of a patient. In this embodiment, as shown in figures 5-7, the cannula 12 is extending from the second surface 11 of the base part thereby penetrating the first fastening means. Alternatively the cannula 12 can extend from the -head-par-t or-the-base-pa-rt 3-of-the-infus-ion-part 1-es$enti-all-y-along the axis-A
for an inclined insertion of the cannula 12. Furthermore, the infusion part comprises guide means 7 for positioning the infusion part 1 and the connector 2 in'relation to each other these guide means 7 of the infusion part 1 being positioned on the head part 6. As can be seen in figures 1, 3 and 5, the base part 3 has a first end 3a and an opposite second end 3b, the first end 3a being the end provided with the head part 6 and the second end 3b being positioned opposite the first end 3a. The base part 3 can be divided into three parts, the first part incorporating the first end 3b and normally being covered with the head part 6, the middle part normally being. provided with a needle insertion opening 4 and the last third incorporating the second opposing end 3b normally being provided with retention devices 8: As shown in figure 4, 5, and 7, the base part 3 is further provided with openings 9, in this case two openings 9, placed between the head part 6 and the retention devices 8. In this embodiment these two openings 9 are related to manufacturing purposes.

First fastening means In one embodiment, as illustrated in figure 9, the first fastening means could be in the form of a mounting pad 21 for attaching the infusion part 1 to the skin of a patient comprises an adhesive layer (not shown) and a removable release liner 22, which covers the adhesive layer. In general the adhesive 1ay_e.r_-is a_skin_frierLdly. adhes.i~e kno.wn_p_er_se. Th.e_mounting pad may be a dressing, a plaster, an adhesive pad or the like and may be configured in various shapes such as circular, oval, triangular, rectangular etc.

Connector As most clearly seen in figures 5-7, the connector 2 has a plane being parallel to and above the main plane of the base part 3 when assembled with the infusion part 1. In this embodiment as clearly illustrated in figure 1, 4, and 7, the connector is provided with two arms 15, which arms are fastened to the connector 2 at a first end 2a, and unfastened and free in a second opposite end 2b, so that the arms 15 can move laterally at the second end 2b. The second end 2b of the connector 2 corresponds to the second end 3b of the base part 3, when the infusion part 1 and the connector 2 are positioned and assembled relative to each other. By providing the connector with two arms 15 it is easier to get a good grip and a better control over the connector 2, when the connector 2 is to be disconnected from the infusion part I intended.

As can be seen in e.g. figure 5-7 .the connector 2 is further provided with a protecting part 20 for protection of the free second end 2b of the arms 15, the arms 15 being more flexible at the free second end 2b, and therefore more sensitive to contact at the free second end 2b, in order not to release or disconnect.the_connector2_from the infusion part 1_unintended by accident.
As mentioned above, the connector comprises the tube 14 positioned in the second end 2b for connecting the infusion. set to a medical device.
Furthermore, the connector comprises guide means 16 for positioning the infusion part 1 and the connector 2 in relation to each other. The connector 2 can be symmetrically formed around a connector main plane and around the plane perpendicular to the main plane and parallel to the main axis, which allows the connector 2 to match with the base part 3 in two ways.

FLow-aath_ As can be seen in figures 1-7 the head part 6 of the infusion part 1 is further provided with an insertion needle opening 4 for receiving an insertion needle for insertion of the infusion device, and a connector opening 5 for receiving a second cannula 13, which second cannula 13 is extending from the connector 2 along the longitudinal axis A. This cannula 13 is .in fluid connection with the tube 14 extending from the opening 19 in the connector 2, which tube 14 provides the connection to a medical device such as an insulin pump (not shown). In the alternative, as the insertion needle opening -4-is-pr-ovided for-the-insertion-of-a-soft c-anr-rul-a 1-Z,-the-head-par-t-6-need-not be provided with an insertion needle opening 4 if the cannula 12 is made of metal. The head part 6 is provided with a cavity (not shown), which cavity is adapted for receiving both the cannula 12 and the second cannula 13, said cannula 12 being in fluid communication with said cavity, and the second cannula 13, which extends along a longitudinal axis A from the connector 2, is being in fluid communication with the tube 14, i.e. cavity as used herein designates the inner lumen of the cannula or the extension of the cannula.
The cavity is being positioned in the head part 6 between the first set of guide means 7 and limited by the first surface 10 of the base plate, the insertion needle opening 4 as well as the connector opening 5. I.e. the cavity (not shown) optionally being covered by a membrane is adapted to receive the second cannula 13 extending from the connector 2.
In this embodiment, as shown in figures 2, 3 and 6, the cannula 12 is extending from the second surface 11 of the base part 3 along a longitudinal axis B thereby being positioned perpendicular to the skin of the patient. In the alternative, the cannula 12 can extend from the first end 3a of the base part -or-head-part-6 es-sentially along the axis A-or slightly angled in relation to the axis A in order to provide the patient with an infusion set with an inclined insert in a manner known per se as described in WO 94%20160.

GtjidQmPans As illustrated in e.g. figure 5 and as mentioned in the sections infusion part and connector above, the infusion part 1 and the connector 2 are each provided with corresponding guide means 7,16 for positioning and aligning the infusion part 1 and the connector 2 in relation to each other. The guide means can be in the form of a tongue and groove mechanism. The tongue and groove mechanism can be of different configurations or shapes, for instance it may be in the form of a pater/mater system or the tongue and groove may be formed with a triangular or semi-cylindrical cross sectional ar-ea-ln-this-embodirnent the fir-st guide-means 7 of-the-infusion-part 1--is having the form of two grooves placed symmetrically around the main plane of the base part 3, these grooves 7 being adapted to engage with a second set of corresponding guide means 16 placed on the connector 2, in this embodiment the corresponding second guide means 16 are in the form of two tongues or projecting parts, such as stabilizing fins which fit within the first guide means 7, the guide means 7,16 thereby constituting a tongue and groove system. As an alternative, the first guiding means 7 of the infusion part 1 could be in the form of projecting fins and the second guide means 16 on the connector 2 could be in the form of recesses or grooves.

Second fastening means - retention devices The__infusion part 1 and the connector 2 are provided with_ second fastening means for fastening the connector 2 to the infusion part 1. As can be seen in e.g. figure 5, the second fastening means are in the form of connector retention devices 17 positioned on the free end of the arms 15 of the connector 2 adapted to engage with corresponding retention devices 8 positioned in the second-errd--3b on the-base part 3 of-the infusion part 1.
In this way, the connector 2 is releasably fastene6to.the infusion part 1.

When the infusion part 1 and the connector 2 are assembled, the free' end of thP armG_15, i.e. the second._opposite end 2b, is positioned. just opposite or above the retention devices 8 in the second end 3b of the base part 3. As shown in figure 5-7 the retention devices 8 in this embodiment are two retention devices 8 extending from the first surface 10 of the base part 3 for fastening or retention of the connector 2 to the infusion part 1. In this embodiment the retention devices 8 are placed on the far rear end, meaning the second end 3b, of the base part 3 and the connector retention devices 17 of the rear-facing arms 15 are likewise placed on the far rear end, meaning the second end 2b, of the rear-facinq arms 15 corresoondinq to the retention -devices-8:

Accidents involving pulling or tugging in an inclined motion of the tube extending from the connector 2, due to e.g. the .tube catching on to something, thereby overloading the infusion set often happens resulting in the infusion set being unintentionally pulled from the skin of the patient. It is essential for the user that at least the infusion part 1 of the infusion set 1,2 remains in place after insertion even when accidents involving puling or tugging of the tube is involved. The present invention complies with this purpose as the plane of the of the connector 2 can be tilted to a distance from the base plate 3, causing the second end 2b to be displaced to a distance that is larger than the height (h) of the retention devices 8, said retention devices 8 being positioned in the second end 3b of the base part 3, ~~

when the connector 2 is positioned via the guide means 7,16 relative to the infusion part 1. As the plane of the connector 2 is displaced, i.e. being inclined from the base part 3, the second end 2b of the connector together with the arms 15 of the connector will be lifted resulting in the connector retention devices 17 being freed from the retention devices 8. Hereby the retentiorr devices 8 and, the connector retention devices 17 will be released from each other resulting in the connector 2 disconnecting from the infusion part I as opposed to the infusion part I being peeled of the skin of the patient.

In an embodiment of the invention, the second end 2b of the connector 2 can be displaced to a distance from the base plate 3, which distance is larger than the height (h) of the retention devices 8, by making the connector 2 pivot around a point in the guide means 7, 16.

Retention devices As mentioned above, the displacement of the connector 2 from the main plane of the base plate 3, when the connector 2 is positioned via the guide -r-raeans 7,-1-6-r-elative-to the-infusion-par-t 1; is-dependent on the-height of the retention devices 8 and the height (h) of the connector retention devices 17.
The lower the height of the retention devices 8 and the connector retention devices 17, the less displacement of the second end 2b from the main plane of the base part 3 is needed for releasing the connector 2 from the infusion part 1. The height of the retention devices 8 is again dependent on the shape of the retention devices 8 and the connector retention devices 17 including the contact surface of both the retention devices 8,17.

In figure 8 different shapes of the retention devices 8 are illustrated. The retention devices 8 are formed with a contact surface 8a for contact with the opposing contact surface 17a of the corresponding connector retention devices 17 of the arms 15, which opposing contact surface 17a can be seen _in-figur_e_8a._.T_he_contacts.u_rface_.8a_of the._r_etention_devices 8 is extending from the first surface of the base part 3. The contact surfaces 8a have a plane having a projection of the height (h) perpendicular to the main plane.of the base part 3. In one embodiment the contact surface 8a of the retention devices 8 is being essentially perpendicular to the main plane of the base part 3, when the infusiorrpart -1 and -the -connector 2 are connected, i.e.
the angle between the contact surface 8a and the base part 3 is approximately 90 . However, the form of the retention devices 8 could also be e.g. as a slope, a chute, a half-circle, a triangle or the like, where the contact surface 8a is being angled relative to the main plane of the base part 3, i.e. that the angle a between the contact surface 8a of the retention devices 8 and the base part 3 is more than 90 as can be seen in figure 8. For each of the mentioned shapes of the retention devices 8 the projection of the height (h) perpendicular to the main plane of the base part 3 can be varied. In this way, it is possible to vary the height of the retention devices 8 on the base part and thereby influence the slipping between the two contact surfaces of the retention devices 8 and the connector retention devices 17 so as to secure that the connector 2 is disconnected from the infusion part 1, when the tube --14-is ac-cident~alFy pua-led-in-an-inclined-motion.--Other shapes than the shapes shown in figure 8 is possible in order to obtain the height of the retention devices 8 which is required or needed for disconnecting the connector 2 from the infusion part 1.

Connector retention devices As shown in figure 8a, the connector retention devices 17 of the arms 15 of the connector 2 are as the retention devices 8 formed with a corresponding contact surface 17a which likewise can be formed as e.g. a slope, a chute, a half-circle, a triangle and the like, by triangle is meant that the retention devices shaped as a right-angled triangle when viewed from the side or having a right-angled triangular cross-section, which interlocks or fasten the arms 15 to the retention devices 8 on the base part 3. For each of the mentioned shapes of the connector retention devices 17 the projection of the height perpendicular to the main plane of the connector 2 can be varied. In this way it is also possible to vary the height (h) of the connector retention devices 17 and influence the slipping between the two contact surfaces of the retention devices 8 and the connector retention devices 17 so as to secure that the connector 2 is disconnected from the infusion part 1, when the tube 14 is accidentally pulled in an inclined motion.

-Wha.nthe infusion part_ 1_and the connector 2ar_e-assembled, the contact surface 8a of the retention devices 8 and the contact surface 17a of the connector retention devices 17 are engaged with each other, hereby securing the assembly of the connector 2 and the infusion part 1. Thus, if a pull or a toggle of the tube 14 or of the second end 2b of the connector 2 along the axis A is performed, the retention devices 8 and the connector retention devices 17 will not disengage. In order to intended release the connector 2 from the infusion part 1, the arms 15 of the connector will have to be gripped and pressed to displace the arms axial along and axis in the main plane of the connector and perpendicular to the axis A. In this way the connector retention devices 17 on the arms 15 are freed from the retention devices 8 on the base part 3.

Head part When the cannula 12 is inserted into the skin of a patient and the insertion angle being perpendicular to the main plane of the base part 3, the head part 6 of the infusion part I will normally cover the insertion site. By making the head part 6 of a see-through material such as transparent polypropylene (PP), the head part 6 can function as a window giving the patient or the user a clear view of the place of insertion. By providing a see-through part or a window in the head part 6 of the infusion part 1, the patient or the user therefore can keep the insertion site under observation and at all times _dete.r_mine whether_the_inserti.on site_or_the-insertion_wound_is_infected or not or whether the cannula 12 is positioned correctly into the skin of the patient.
Another way of making the head part 6 of the infusion part I sufficiently transparent to get a good visual impression and a clear view of the inserted cannula; is-to polish- the-mouid used-for- makiiTg the infusion part 1 before casting the infusion part 1. This renders the mould smooth and assists efforts of both the first and, second surface of the head part 6 to be transparent. As another alternative, it is possible to cast the infusion part I and afterwards polish thP hPaci part 6 of the-infusion-par"_ AG ftukhPr-aJiernati_vA-it is possible to cast the infusion part 1 with a concavity in the second surface of the head part 6, said second part facing the skin of the patient, so that the thickness of the head part 6 above the insertion place/wound area is decreased or reduced providing better see-through properties and increased view through the head part 6. As a still further alternative, it is possible to either produce the infusion part 1 with a magnifying area or a lens embedded in the head part 6 or to fit or mount a lens in the head part 6 of the infusion part 1 during moulding. This way, when looking through the magnifying area -or-the-lens-of-the-head-pa-r-t 6,-a-magnified view of the insertion place/wound area is generated.

Gripairia means In an embodiment, as shown in figure 5-7, the arms 10 of the connector 2 is provided with gripping means 18 in the form of recesses. The gripping means 18 are optional and can be rims, grooves, scores, recesses and pebbled or roughened surface, optionally of another material than the connector itself.
This ensures a more simple and easy grip when gripping and pressing the arms of the connector 2 with the first finger and the thumb for fastening or unfastening of the connector 2 from the infusion part 1.

Materials/Plastics In another embodiment the infusion part 1 and the connector 2 of the infusion set are made from two different plastics materials, such as two different types of polypropylene. When making the infusion set of different materials it is possible to enhance the different characteristics which are working for each -of them. The infusion-part1-is normally quite small and is put in a stationary position during use, which is why it should have a smooth surface and a limited flexibility in order to provide the user with the best comfort. The connector is normally also quite small and is often moved during use, the r.onnPc.tor thPrPfnrP GhAuld_e~-as_y and comforta.bl.e tn handle..~'Jh.e_i.nfus.ion part and/or the connector can essentially be made of polypropylene, e.g.
such as transparent polypropylene. In this way it is possible to see through the infusion set and thereby being able to see the cannula insertion wound.
Cannula The cannula 12 is preferably a soft cannula made of a thermoplastic elastomer (TPE), the TPE's being selected from the group consisting of polyester ethers, ECDEL, styrene based TPE, olefin based TPE, urethane -bas-ed TPE; --ester-bas-ed TPE,--amid--based-T-PE,--polyolefin--sans--silicone rubbers such .as polypropylene, C-FLEXTM, mixtures of ' C-FLEXT"" and polypropylene, LUPOLENTM 1840H, LUPOLENT"" 3020D, PELLETHANETM
2362-75D, PELLETHANETM 2363-55D, TECOTHANETM and CARBOTHANETM, but could also be made of metal.

Luer coupling/medical device The connector 2 can be connected to a luer coupling member through the tube 14. Through the luer coupling it is possible to administer a suitable therapeutically substance, such as insulin from a pump. The connector can also be a sort of closing part with a suitable entrance for an inserting needle of a syringe. Such a closing part can stay in position for up till three days while the user can have medication, e.g. insulin injected through the entrance -in_or_d.er_to_r_educe trauma to. the_s.kin_caused_.b_y_r_ep-eated_penetr-ation of the skin.

Kit comprising an infusion set and an insertion device In another embodiment the invention relates to a system or a kit, said kit comprises-an injactor device-together-with -an-infusion-set -according to -the invention. The injector device itself is being provided to the patient as a sterile sealed, single use assembly. The injector device is for quick and easy placement of the infusion set and may then be discarded safely.

Iniector device Figure 10 shows an embodiment of an injector device which can be used with an infusion set in accordance with the invention. The injector device comprises a housing 23, in this embodiment the housing comprises two fastening elements 24 which assures that a plunger 25 cannot rotate in relation to the housing. The plunger 25 is slidably received within the housing 23 for movement between an advanced position and a retracted position, the plunger 25 having substantially non-detachably secured thereto a medical -tns-er-tion-need-le-(not-shflwn)-wFth-a-pointed-end for-r-eceiving-and-supporting the cannula 12 of the subcutaneous infusion set in a position with the cannula 12, where the insertion needle is removable from the cannula 12 while maintaining a transcutaneous placement of the cannula 12.

By substantially non-detachably as used in the present application is meant a connection, which will remain stable under normal conditions of use to allow the needle to remain on the plunger 25 when retracting the injector device from the patient's skin.

The housing 23 of the injector device can also comprise detaining elements 26 iri the form of two protruding parts keeping the plunger 25 in a biased position until the plunger are released from the biased position by affecting -some. release_means. The plunger 25 is constructed with a central part 25a and a surrounding part 25b. The central part 25a functions as a finger grip and the surrounding part 25b functions as a drive. The central part 25a can slide between an advanced position and a retracted position in relation to the housing 23 and the infusion part 1 of the infusion set is fastened to the -central part 25a: Th-e-sUrroun-ding-part 25b-is constructed-astwo parts formed almost as semicircles, where one end of each semicircle is attached to one of the fastening elements 24 of the housing 23, and the other end of each semicircle is fastened to the central part 25a. The end of the semicircle fastPnPd tothP hollsina 23 at thP fastPning PlPments r1nPs nnt 11]o_v_e_r_elative to the housing 23 during use. The other end of the semicircle which is attached to the central part 25a is pulled out of the housing 23 (arrows for direction in fig. 10). When pulling in the central part 25a, the surrounding part 25b which functions as a drive, will be tightened. The surrounding part 25b is kept in the biased position by two protrusions 27 (only one shown). The protrusions 27 are in this embodiment attached to.a connecting wall 28, but could just as well be attached to the central part 25a. When the central part is pulled out of the housing 23, the protrusions 27 will be pulled past the -deta-ining-elemeents -26 and these-element-s-wil-I-pr-event-the-pr-otr-u-sion-2-7-and thereby the central part 25a from returning to a relaxed position inside the housing 23.

The housing 23 can be released by pressing on the sides of the housing at a line perpendicular to the line formed by the two detaining elements 26 (direction indicated by arrows on figure 10). When pressing at the two opposite sides in this position, the resulting deformation of the housing will cause the two detaining elements 26 to be pushed away from each other, thereby leaving enough room for the protrusions 27 to pass by the detaining elements 26 and for the central part 25a to be forced back into the relaxed position by the drive in the form of the surrounding part 25b.

_T_he_insertion_n_ eedle_may _be-.c-onnected to.-the_plunger 25 in any_ suitable manner such as in the process of moulding the plunger, or the insertion needle may be press-fit in the plunger 24. The insertion needle may be oriented at an angular position relative to the. skin of the patient so as to make an insertion perpendicular to the skin of the patient or so as to make an inclined- insertion.-The housing 23 may have a circular, square or any desired cross-sectional shape. The housing 23 and the plunger 24 are advantageously formed of a plaGtic:s mate.riaLin a mnuld.i.n.g-proce.se.-Other iniector devices Other injector devices than described here can be used together with the infusion set according to the invention but it is necessary that it is possible to adapt the infusion part I of the infusion set and to keep it in position until insertion has taken place.

Manually insertion 1f-V-hether-the-irrfusion-set i-s-intended to-be-i-n-ser-t-ed-manu-aaEy-or-by-an-injector the infusion part 1 and the connector 2 can be delivered to the user as two separate units. When inserted manually the infusion part 1 will at delivery be combined with a needle unit with the same locking and guiding means as the connector. The needle unit is provided with an insertion needle extending from the central front which insertion needle at delivery extends through and beyond the end of the cannula. The needle unit's only function will be to penetrate the user's skin where after the needle unit is removed and replaced with the connector leaving the cannula subcutaneous.

Other medical devices As mentioned above, the connector 2 can be coupled via the tube 14 to a pump for administrating a therapeutically substance such as insulin.

However, the connector 2 can be replaced with a dummy connector or dummy part, which dummy part is shaped to correspond to the connector 2 but without the tube 14 in the second end 2b of the connector 2. In this way, a patient can disconnect the real connector 2 and replace the real connector 2 with said dummy part, a consequence hereof being that the pump for administrating medicines or a therapeutically substance likewise will be disconnected from the patient's infusion set. When the patient is wearing the dummy part or dummy connector and is in need of medication or a therapeutically substance, the patient can e.g. inject the medication or a therapeutically substance through the insertion needle opening 4 in the infusion part 1 directly into the cannula 12 by means of e.g. a syringe.

In this way, it is easier for the patient to leave the house for a shorter period of time without the inconvenience of having to bring unmanageable medical equipment such as the above mentioned pump for administrating medicines, but still be able to inject medicines or a therapeutic substance by use of e.g.
a small syringe when needed.

The invention has been-described with reference to particular embodiments.
Many modifications can be carried out without thereby deviating from the scope of the invention.

Claims (19)

1. An infusion set for intermittent administration of a therapeutically substance through the skin of a patient, comprising:
- an infusion part (1) comprising a base part (3) having a main plane, a head part (6) extending from the main plane of the base part (3) and a cannula (12) extending from the base part (3) into the skin of a patient, - first fastening means for fastening the infusion part (1) to the skin of a patient, - a connector (2) having a plane being parallel to and above the main plane of the base part (3), and having one or more arms (15), said arms (15) being fastened to the connector (2) at a first end (2a), and being free in a second opposite end (2b), and a tube (14) positioned in the second end (2b) for connecting the infusion set to a medical device, - guide means (7,16) for positioning the infusion part (1) and the connector (2) in relation to each other, - second fastening means for fastening the connector (2) to the infusion part (1), said second fastening means being in the form of projecting connector retention devices (17) positioned on the arms (15) of the connector (2) adapted to engage with retention devices (8) extending from the base part (3), characterized in that the plane of the connector (2) can be tilted to a distance from the base part (3), causing the second end (2b) to be displaced to a distance that is larger than the height (h) of the retention devices (8), said retention devices (8) being positioned in the second end (3b) of the base part 3, when the connector (2) is positioned via the guide, means (7,16) relative to the infusion part (1).
2. An infusion set according to claim 1, wherein the connector (2) is pivotable at the first end (2a) when positioned in the guide means (7,16) around an axis, said axis being parallel to the main plane of the base part (3) and perpendicular to a longitudinal axis A of the infusion part.
3. An infusion set according to claim 1 or 2, wherein the cannula (12) of the infusion part (1) is extending perpendicular to and from the lower surface (11) of the base part (3).
4. An infusion set according to any of the claims 1-3, wherein the retention devices (8) of the infusion part (1) are formed with contact surfaces (8a) for engaging with corresponding contact surfaces (17a) of the connector retention devices (17), which contact surfaces (8a) have a plane having a projection of the height (h) perpendicular to the main plane of the base part (3).
5. An infusion set according to claim 4, wherein the contact surface (8a) of the retention devices (8) is essentially perpendicular to the base part (3).
6. An infusion set according to the claims 1-5, wherein the contact surface (17a) of the connector retention devices (17) of the arms (15) is being essentially perpendicular to the main plane of the base part (3), when the infusion part (1) and the connector (2) are assembled.
7. An infusion set according to claim 1, wherein the first fastening means is a mounting pad.
8. An infusion set according to claim 7, wherein the mounting pad is an adhesive dressing.
9. An infusion set according to claim 1, wherein the guide means for positioning the infusion part (1) and the connector (2) relative to each other is in the form of a tongue and groove connection.
10. An infusion set according to claim 9, wherein the groove is positioned on the head part (6) of the infusion part (1) and the tongue is positioned on the connector part (2).
11. An infusion set according to claims 1-10, wherein the head part (6) of the infusion part (1) is provided with a see-through part.
12. An infusion set according to claim any of the claims 1-11, wherein the head part (6) of the infusion part (1) is made of transparent polypropylene.
13. An infusion set according to any of the claims 1-12, wherein the see-through part of the head part is formed by reducing the thickness of the head part (6).
14. An infusion set according to any of the claims 1-13, wherein the see-through part of the head part (6) is provided with a magnifying area.
15. An infusion set according to any of the proceeding claims 1-14, wherein the arms (15) of the connector (2) are provided with gripping means (18) for easy gripping when pressing the arms (15) for disconnection of the connector (2) from the infusion part (1).
16. An infusion set according to any of the proceeding claims 1-15, wherein the infusion part (1) and the connector (2) are made from two different plastics materials.
17. An infusion set according to any of the proceeding claims 1-16, wherein the infusion part (1) and/or the connector (2) essentially is made from polypropylene.
18. An infusion set according to any of the proceeding claims 1-17, wherein the medical device is an insulin pump.
19. A kit comprising an injector device and an infusion set according to any of the claims 1-17 where the injector device comprises:
- a housing (23) - a plunger (25) slidably received within the housing (23) for movement between an advanced position and a retracted position, the plunger (25) having substantially non-detachably secured thereto an insertion needle for receiving and supporting the cannula (12) of the subcutaneous infusion set (1,2) in a position with the cannula (12), where the insertion needle is removable from the cannula (12) while maintaining a transcutaneous placement of the cannula (12), - a drive (25b) for urging the plunger (25) from the retracted position toward the advanced position to transcutaneously place said cannula (12) of the infusion set (1,2) received on the insertion needle.
CA002666744A 2006-10-31 2007-10-29 Infusion set Abandoned CA2666744A1 (en)

Applications Claiming Priority (5)

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US85555406P 2006-10-31 2006-10-31
EP06022674.3 2006-10-31
EP06022674A EP1917990A1 (en) 2006-10-31 2006-10-31 Infusion set
US60/855,554 2006-10-31
PCT/DK2007/000459 WO2008052545A1 (en) 2006-10-31 2007-10-29 Infusion set

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CA2666744A1 true CA2666744A1 (en) 2008-05-08

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JP (1) JP2010508098A (en)
KR (1) KR20090078338A (en)
CN (1) CN101557845B (en)
AT (1) ATE490796T1 (en)
AU (1) AU2007315380A1 (en)
BR (1) BRPI0717862A2 (en)
CA (1) CA2666744A1 (en)
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ATE490796T1 (en) 2010-12-15
US8012126B2 (en) 2011-09-06
ES2356948T3 (en) 2011-04-14
EP1917990A1 (en) 2008-05-07
CN101557845A (en) 2009-10-14
DE602007011101D1 (en) 2011-01-20
RU2447907C2 (en) 2012-04-20
JP2010508098A (en) 2010-03-18
EP2089081B1 (en) 2010-12-08
PT2089081E (en) 2011-03-07
IL197957A0 (en) 2009-12-24
RU2009120556A (en) 2010-12-10
EP2089081A1 (en) 2009-08-19
AU2007315380A1 (en) 2008-05-08
BRPI0717862A2 (en) 2013-11-05
NO20092119L (en) 2009-05-29
KR20090078338A (en) 2009-07-17
US20100022956A1 (en) 2010-01-28
CN101557845B (en) 2012-05-30
PL2089081T3 (en) 2011-07-29
DK2089081T3 (en) 2011-02-28
WO2008052545A1 (en) 2008-05-08
MX2009004165A (en) 2009-05-01

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