AU716270B2 - Wound dressing - Google Patents
Wound dressing Download PDFInfo
- Publication number
- AU716270B2 AU716270B2 AU13911/97A AU1391197A AU716270B2 AU 716270 B2 AU716270 B2 AU 716270B2 AU 13911/97 A AU13911/97 A AU 13911/97A AU 1391197 A AU1391197 A AU 1391197A AU 716270 B2 AU716270 B2 AU 716270B2
- Authority
- AU
- Australia
- Prior art keywords
- dressing
- layer
- adhesive
- wound dressing
- protector
- 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.)
- Ceased
Links
- 239000010410 layer Substances 0.000 claims description 125
- 239000000853 adhesive Substances 0.000 claims description 62
- 230000001070 adhesive effect Effects 0.000 claims description 61
- 230000001012 protector Effects 0.000 claims description 52
- 239000000463 material Substances 0.000 claims description 30
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 230000002787 reinforcement Effects 0.000 claims description 8
- 239000012790 adhesive layer Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 239000010408 film Substances 0.000 description 27
- 206010052428 Wound Diseases 0.000 description 13
- 208000027418 Wounds and injury Diseases 0.000 description 13
- 229920002635 polyurethane Polymers 0.000 description 8
- 239000004814 polyurethane Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 6
- 239000004721 Polyphenylene oxide Substances 0.000 description 5
- 229920000570 polyether Polymers 0.000 description 5
- -1 polyethylene Polymers 0.000 description 5
- 239000010409 thin film Substances 0.000 description 5
- 229920000728 polyester Polymers 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 239000012779 reinforcing material Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 206010011985 Decubitus ulcer Diseases 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920002614 Polyether block amide Polymers 0.000 description 1
- 208000004210 Pressure Ulcer Diseases 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M acrylate group Chemical group C(C=C)(=O)[O-] NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 150000005215 alkyl ethers Chemical class 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000010227 cup method (microbiological evaluation) Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229920001477 hydrophilic polymer Polymers 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000001990 intravenous administration Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920001281 polyalkylene Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 229920006264 polyurethane film Polymers 0.000 description 1
- 229920001289 polyvinyl ether Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/02—Adhesive bandages or dressings
- A61F13/023—Adhesive bandages or dressings wound covering film layers without a fluid retention layer
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F2013/00361—Plasters
- A61F2013/00544—Plasters form or structure
- A61F2013/00604—Multilayer
- A61F2013/00608—Multilayer with reinforcing layers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F2013/00361—Plasters
- A61F2013/00795—Plasters special helping devices
- A61F2013/008—Plasters special helping devices easy removing of the protection sheet
- A61F2013/00808—Plasters special helping devices easy removing of the protection sheet force step in removing the protection layer
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F2013/00361—Plasters
- A61F2013/00795—Plasters special helping devices
- A61F2013/00817—Plasters special helping devices handles or handling tabs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F2013/00361—Plasters
- A61F2013/00795—Plasters special helping devices
- A61F2013/00829—Plasters special helping devices rigid or semi-rigid backing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F2013/00361—Plasters
- A61F2013/00795—Plasters special helping devices
- A61F2013/00829—Plasters special helping devices rigid or semi-rigid backing
- A61F2013/00834—Plasters special helping devices rigid or semi-rigid backing as a frame
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F2013/00361—Plasters
- A61F2013/00855—Plasters pervious to air or vapours
- A61F2013/00859—Plasters pervious to air or vapours with macroscopic openings
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Materials For Medical Uses (AREA)
- Adhesive Tapes (AREA)
Description
WOUND DRESSING The present invention relates to wound dressings and particularly, though not exclusively, to thin film dressings.
Thin film wound dressings are a widely used and popular form of dressing for a variety of wound indications, including acute wounds, catheter insertions, skin grafts and for prevention of pressure sores and retention of other types of dressing. Thin film adhesive wound dressings have many beneficial features, being, usually highly conformable and therefore comfortable and mouldable to body contours, transparent and moisture-vapour permeable.
However they may be difficult to handle and apply without creasing or rucking because the adhesive surface of the dressing may easily 15 stick to itself unless the dressing is kept flat during its application to the patient.
9 9 Over the years, many different forms of presentation of thin film dressings have been suggested. One such dressing, described in 20 EP-A-051935, is provided with a frame on the non-adhesive side of the dressing to support the film in a flat, wrinkle-free condition until adhered to the skin. A different approach to the problem is seen in the dressings sold as OPSITE (trade mark) by Smith and Nephew Healthcare Ltd, in which the non-adhesive side of the film dressing is releasably attached to a support layer which comprises a film which is stiffer than the film dressing. The support layer is usually removed after the dressing has been applied.
In EP 0161865, an adhesive wound dressing in which a layer of hydrophilic polyurethane has an apertured surface and adhesive layer covered by a protector layer is disclosed. The protector layer is extended by strips attached to the protector layer by means of adhesive coated tabs.
According to the invention, wound dressing comprising a dressing layer RA. having a first surface and a second surface, a layer of pressure sensitive adhesive Sadhered to the first surface of the dressing layer; and a releasable protector layer 44)
O
oGC_ covering the adhesive and a support layer which covers at least a part of the second surface of the dressing characterised in that the protector layer comprises at least first and second edge portions and a separate central portion wherein the central portion covers a portion of the adhesive and the edge portions cover at least the remaining portion of the adhesive, the first and second edge portions being releasable from the adhesive independently of the central portion.
The dressing layer is preferably a film, very preferably a polymer film which is preferably breathable, i.e. it preferably has a permeability to moisture vapour of at least 200 gm 2 day 1 at 370C and 10% relative 15 humidity. Suitable films include polyurethane films such as those already used in the manufacture of known dressings, such as those described in United Kingdom Patent No. 1280631, European ~Patents Nos. 51935, 91800 and 178740. Particularly apt materials are polyurethanes, for example polyester or polyether polyurethanes 20 sold by B.F. Goodrich under the ESTANE trade mark. Other apt materials are elastomeric polyether polyesters, for example those sold as HYTREL (trade mark of DuPont) and polyether polyamides, for example those sold as PEBAX (trade mark). Other favoured .materials include hydrophilic polymers such as hydrophilic polyurethanes including those described in United Kingdom Patent No. 2093190B, especially the polyurethane described in Example 1 therein. The film may have a high moisture vapour permeability e.g.
greater than 1000gm- 2 day' or it may have a moisture-vapour permeability which is greater when it is in contact with water than when it is not in contact with water. The film is preferably transparent and preferably also elastomeric for conformability to body contours. The film is relatively thin, i.e. it is preferably less than about 200 ltm thick and more preferably less than 100 tpm thick.
The moisture vapour transmission rate of the materials employed in the present invention may be measured by a procedure known as the Payne Cup method. The method uses a cup deep with a flanged top. The inner diameter of the flange is such to provide an area for moisture vapour transmission of 10cm 2 In this method 10ml of distilled water is added to the cup and a sample of the material under test, large enough to completely cover the flange, AM ENDED SHEET WO 97/25012 PCT/GB97/00077 3 is clamped over the cup. The complete assembly is then weighted and placed in a cabinet where the temperature and relative humidity are maintained at 37 0 C and 10% respectively. After 17 hours the cup is removed from the cabinet and allowed to cool at room temperature. After re-weighing, the mass of water lost by vapour transmission is calculated and the result expressed as in g/m 2 /24 hrs at 37 0 C at 100% to 10% relative humidity difference.
The pressure-sensitive adhesive is preferably skin-friendly and non-adhesive to wounds. Suitable adhesives include compositions which include acrylate groups and polyvinyl alkyl ether based adhesives but any other known adhesives which are suitable for use on medical dressings may also be used. Suitable adhesives are described in GB-A-1280631, EP-A-35399 and EP-A-51935.
Preferred adhesives include polyvinyl ether adhesives or an acrylate ester copolymer adhesive formed by the copolymerisation of 2-ethylhexyl acrylate, butyl acrylate and acrylic acid. The adhesive layer may be continuous or discontinuous, e.g. patternspread.
The releasable protector layer comprises a layer of material which is readily removable from the adhesive surface of the dressing when required. Suitable materials include paper and film materials which have a surface which enables the material to be peeled away from the adhesive. The surface may be coated with a release material such as a silicon containing compound for example, to give good release properties. The protector layer is held in place against the adhesive by the adhesion of the layer to the pressure-sensitive adhesive. Thus, the protector layer should be at least weakly adherent to the adhesive used. The protector layer may include a part which is folded back to form a handle to assist in removal of the protector. The protector layer may include reference markings, product information/instructions or other indicia.
The protector layer includes two or more edge portions which are disposed along at least two opposed edges of the dressing.
Preferably only two edge portions are present when the dressing is rectangular. The edge portions are each preferably narrower than WO 97/25012 PCT/GB97/00077 4 the central portion of the protector layer. In a preferred embodiment therefore the protector layer is divided into three contiguous portions of which one is a central portion which is flanked by two edge portions. The central portion may comprise a single piece of protector layer material or it may be divided into more than one piece which together form the central portion covering a central region of the adhesive area.
The protector layer may be die cut in situ to form the three portions. The edge portions may be substantially rectilinear or they may be otherwise shaped. For example, the inner edges of the edge portions those edges which are adjacent to the central protector portion) may be straight or curved, to define a convex or irregularly shaped central portion, for example. The edge portions may be integral if they are located along two or more adjacent edges. When the dressing is circular or oval, by "edge portions" we mean parts of the protector layer which are disposed over segmental parts of the adhesive layer adjacent the edge portions, preferably disposed at substantially opposed parts of the edge of the dressing.
The protector edge portions may include a part which extends beyond the edge of the dressing to serve as a tab or handle to facilitate removal. Alternatively a part of the edge portions may extend over the remaining part of the adhesive-protector layer so that it may be gripped. Similarly a part of the central portion of the adhesive-protector layer may extend over the edge portions to ease removal of the protector layer. Any such extending part may be folded back to extend away from the adhesive, e.g. forming a Vshaped handle, to further ease handling or removal of the adhesiveprotector and/or the support strips.
The edge portions are removable from the dressing by being peelable from the adhesive of the dressing. However the adhesive and dressing layer may be adapted, e.g. by perforating, to be torn away from the remainder of the dressing along the line separating the edge portion of the protector layer from the central portion.
WO 97/25012 PCT/GB97/00077 The support layer is made of material which is relatively stiff compared to the material of the dressing layer so that it may support the dressing layer and be resistant to creasing and bending.
Suitable materials include polyalkylene films, such as polyethylene or polypropylene, or polyesters such as poly-ethylene terephthalate.
Paper-based materials may also be suitable. The support may be transparent, translucent or opaque and may optionally be printed with reference markings or with information relevant to the use of the dressing.
The support is located on the second, non-adhesive side of the dressing layer. The support may cover only a part of the dressing layer which is preferably adjacent to an edge or edges. In one preferred embodiment, the support comprises at least one strip of support material disposed along at least one edge of the dressing.
Preferably, two support strips are provided which are preferably disposed along opposed edges of the dressing. By opposed edges we mean that when the dressing is rectangular or another regular polygonal shape, the support strips are positioned along opposite edges of the dressing. When the dressing is circular, oval or otherwise shaped so that "opposed edges" do not conventionally exist, we mean that the strips are each positioned over a segment of the dressing, the segments being substantially diametrically opposed. The strips may be rectilinear or otherwise shaped, e.g.
they may be shaped to conform to the shape of the dressing, especially the peripheral shape of the dressing. In this form, the area covered by the support is normally less than 50% of the total dressing area. The support strip(s) is preferably disposed transverse to the protector edge portions.
Alternatively, the support may cover all or substantially all of the non-adhesive surface of the dressing layer. In this form the support layer may comprise one or more than one part. For example, it may comprise a layer which covers substantially all of the non-adhesive surface of the dressing layer which is preferably cut into two or more parts to assist removal and improve conformability of the dressing. In one such form, the support layer is cut along a straight line which may be either substantially parallel WO 97/25012 PCT/GB97/00077 6 or perpendicular to the orientation of the edge portions of the protector layer. In a modified form the support layer may comprise more than two parts. The edges of the parts of the support layer need not be straight, e.g. the support layer may be divided into e.g.
two parts by an undulating or curved line.
The support may be adhered to the dressing by means of an adhesive but preferably the adhesion of the support to the dressing is brought about by inherent attractive forces which exist between the two materials such as static forces or basic mechanical forces as is known in the art of-providing support layers for thin film dressings. The support is very preferably readily removable from the dressing when required e.g. by peeling or, less preferably, by tearing off the parts of the dressing on which it is located. The support may include a part which extends beyond the dressing layer to serve as a tab to assist in removal of the support strips.
Alternatively, the support may include a part which is folded back away from the dressing layer to enable the support to be gripped easily for removal.
A preferred form of the dressing is rectangular and has two support strips along two opposed edges on the non-adhesive surface of the dressing layer, and two edge portions of the protector layer which are positioned along the remaining two opposed edges on the adhesive surface of the dressing layer.
In one form, the dressing has an aperture extending through the dressing layer and, optionally, also through at least a part of the protector layer. The aperture most preferably extends from one edge of the dressing, which edge may or may not be one along which an edge portion of the adhesive-protector layer is disposed.
The aperture may cut through a support layer which is disposed on the non-adhesive surface of the dressing in the region of the aperture and may or may not extend beyond such a support layer.
The aperture is preferably elongate, extending towards the central portion of the dressing. The aperture may take the form of a slot but in a preferred form it is key-shaped. The provision of an aperture makes the dressing particularly suitable for applying over and around a device such as an intravenous catheter or cannula.
This form of dressing may further comprise a reinforcement in the region of the aperture to prevent the dressing from tearing as it is moulded around the catheter or similar device. The reinforcement may comprise a film or a woven or non-woven fabric adhered or laminated to the non-adhesive side of the dressing. A suitable reinforcement material may therefore comprise an adhesive tape of film, fabric or fabric-reinforced film placed over the second surface of the dressing in the region of the aperture. The aperture extends throughl such a reinforcing layer, if present. The reinforcement may 15 provide additional support to the dressing layer in the region of the •aperture.
aIn one embodiment of the apertured form of dressing, the dressing layer may be replaced in the region of the dressing 20 containing the aperture by a second stiffer material. The stiffer amaterial is preferably conformable to body contours whilst being of sufficient stiffness to prevent rucking and creasing of the dressing in :a the region of the aperture to enable the dressing to be handled. The second, stiffer material may comprise a fabric (woven or non-woven) 25 or a film which may, optionally, contain reinforcements such as a fibres.
The dressing may additionally comprise an absorbent region in the form of e.g. a pad of absorbent material disposed centrally on the adhesive layer of the dressing.
The dressings are preferably sterile and supplied in a moistureproof and bacteria-proof pack. The protector layer or parts thereof may be an integral part of such a pack.
According to a second aspect of the invention there is provided a method ,o RAz\ of forming a wound dressing comprising the steps of: P:\OPER\CAE\13911-97.AME- 22/12/99 -8- 0 000000 0 0'00.0 o S 0000 t 00 00 o 0 0 0r @00 0000 00 0 0 00 0000 00 0 0 00 0 0 00 0 a) forming a first laminate comprising a dressing layer and a support layer; b) forming a second laminate comprising a layer of a pressuresensitive adhesive compound and a releasable protector layer covering said adhesive; c) bringing said first and second laminates together such that said pressure sensitive adhesive is adhered to said dressing layer; and wherein d) said releasable protector layer cut to form at least first and second edge portions and a separate central portion wherein the central portion covers a portion of the adhesive and the edge portions cover the remaining portion of the adhesive.
According to a further aspect of the present invention there is provided a wound dressing when produced by the method in the preceding paragraph.
Preferably said first laminate is formed by forming said dressing layer "in situ" on said support layer by coating, casting or extrusion.
The invention will now be further described, by way of example only, with 20 reference to the accompanying drawings, which are:- Fig 1, a plan view of one form of the dressing, Fig 2, a section through the dressing of fig 1 along the lines of Fig 1; Fig 3, a section through the dressing of fig 1 along the lines of Fig 1; Fig 4, is a plan of the adhesive protector layer of one form of the dressing; Fig 5, is a plan of a second configuration of adhesive protector layer; Fig 6, is a plan of a third form of adhesive protector layer; Fig 7, is a plan view of the non-adhesive side of an apertured form of the dressing; Fig 8, is a plan view of a second apertured form of the dressing, also from Z the non-adhesive side.
WO 97/25012 PCT/GB97/00077 9 The dressing comprises a thin (40 4m) transparent film of polyurethane which has on one surface a layer of pressure-sensitive adhesive 11. The adhesive is covered by a protector layer of silicone-coated paper 12. The protector layer is divided along lines 14 into three unequal parts 12a, 12b, 12c which define a central region 12b and two opposed edge portions 12a, 12c. The support strips 13a, 13b are formed from a coated transparent polypropylene film which is relatively stiff compared to the film 10 and are attached to the non-adhesive surface of film To use the dressing, the central part 12b of the adhesive protector layer is removed and the dressing may be held by its edges, the strips 12a, 12c serving to prevent the adhesive from sticking to the hands of the user and also to stiffen the dressing along their respective sides. The support strips 13a, 13b prevent the film 10 from creasing transversely and thus in conjunction with the stiffening effect of protectors 12a, 12c help to keep the dressing flat and free of wrinkles whilst it is applied over a wound. The central part of the dressing has no stiffening material and so it remains highly conformable during the application procedure so that it may be moulded around an irregular wound or a catheter for example. When the central part of the dressing is adhered in place, the protector strips 12a, 12c may be removed so that the edges can be adhered to the patient. Finally, support strips 13a, 13b may be removed.
As shown in figs 4-6, the adhesive protector layer may take various forms. In figs 4 and 5 the edge portions 12a, 12c are separate and located along two opposed edges of a rectangular dressing. In fig 6 the edge portion 12a extends continuously along three edges of the dressing whilst central portion 12b is irregularly shaped.
Figs 7 and 8 show apertured versions of the dressing. The dressing in fig 7 has essentially the same construction as that shown in fig 1 in that strips of support material 13 are provided on the non-adhesive surface of the dressing. An elongate aperture which is cut through support layer 13b, film 10 and adhesive 11 WO 97/25012 PCT/GB97/00077 extends from an edge of the dressing towards the centre of the dressing in a direction roughly parallel to the edge portions 12a, 12c of the adhesive protector. The dressing of fig 8 also includes an aperture 15 but in this embodiment a reinforcing material 16 which is more conformable than the material of the support layer 13 is laminated to the film 10 in the region of the aperture. The aperture is included completely within the reinforced area 16 and this reduces the risk of the film tearing when the dressing is moulded around catheter or cannula. The reinforcement 16 is an adhesive tape of a non-woven spun polyester material. The film 10 may be coextensive with the reinforcing material 16 or it may only overlap the reinforcing material to a small extent or be joined to the reinforcement along an edge.
Example of Dressing Manufacture.
A four-layered construction comprising a support layer, dressing layer, pressure-sensitive adhesive layer and adhesive protector layer is formed as follows. A dressing layer-support layer construction is formed by casting a solution of a polyether polyurethane ("ESTANE", supplied by B.F. Goodrich) onto the siliconised surface of a length of a polypropylene film support layer and dried to form a film of polyether polyurethane which is the dressing layer. Separately, a layer of a medically acceptable polyacrylate ester pressure-sensitive adhesive was formed by coating onto a length of a protector layer comprising a commercial silicone-treated polyethylene-coated paper of the type well known for such applications. The two two-layer constructions are then brought together to adhere the adhesive to the dressing layer film.
The resulting sandwich of materials is therefore support layerdressing layer-adhesive layer-protector layer.
In the next stages of the process a die cuts through the protectors layer across the width of the dressing in appropriate positions to delimit the edge portions of the protector layer from the central portion. For a 10cm square dressing the die cuts may suitably be 6-8cm apart to form edge portions which are 1-2cm in width. On the support layer side of the four-layer construction a die 11 or blade cuts a pair of continuous cuts, perpendicular to the first cuts, through the support layer only. The cuts are again 6-8cm apart for a finished dressing width of 10cm. These cuts form 1-2cm wide strips of support layer along the edges of the dressing which are parallel with the edges of the length of four-layer dressing construction. The central part of the support layer between the cuts may be removed if required. Finally the material is cut through all four layers, in registration with the transverse cuts, to form individual dressings. The dressings are subsequently packaged and sterilised.
Throughout this specification and the claims which follow, unless the context requires otherwise, the word "comprise", and variations such as "comprises" and "comprising", will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.
Claims (10)
12- THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS: 1. A wound dressing comprising a dressing layer having a first surface and a second surface, a layer of pressure sensitive adhesive adhered to the first surface of the dressing layer; and a releasable protector layer covering the adhesive and a support layer which covers at least a part of the second surface of the dressing wherein the protector layer comprises at least first and second edge portions and a separate central portion, wherein the central portion covers a portion of the adhesive and the edge portions cover at least the remaining portion of the adhesive, the first and second edge portions being releasable from the adhesive independently of the central portion. oo .o 2. A wound dressing as claimed in claim 1, wherein said dressing layer 0."0%comprises a film. 3. A wound dressing as claimed in claim 1 or claim 2, wherein said edge S portions are narrower than said central portion of said protector layer. S4. A wound dressing as claimed in any preceding claim, wherein said edge S: portions and said central portion each comprise a single piece of protector-layer material. A wound dressing as claimed in any one of claims 1-3, wherein any of said edge portions and/or said central portion comprise more than one piece of protector layer material. 6. A wound dressing as claimed in any preceding claim, wherein the protector edge portions further includes a part which is continuous with and extends beyond the edge of the dressing to serve as a tab or handle to facilitate its removal. -7 OWI P:\OPER\CAE\13911-97.AME 22/12/99 13 7. A wound dressing as claimed in any preceding claim wherein the protector edge portions include a part which extends over the central portion of the adhesive protector layer. 8. A wound dressing as claimed in any preceding claim, wherein said central portion includes a part which extends beyond an edge of the dressing. 9. A wound dressing as claimed in any preceding claim wherein said central portion includes a part which extends over at least one said edge portion. 10. A wound dressing as claimed in any one of claims 6-9 wherein said -g extending part is folded to extend away from the adhesive layer. 11. A wound dressing as claimed in any preceding claim wherein said support i layer is relatively stiff compared with said dressing layer. 0 O.. S12. A wound dressing as claimed in any preceding claim wherein said support layer is disposed over only a part of the dressing layer adjacent an edge or edges.
13. A wound dressing as claimed in any preceding claim wherein said support comprises at least one strip of support material disposed along at least one edge of the dressing.
14. A wound dressing as claimed in claim 13 wherein two support strips are disposed along opposed edges of the dressing. A wound dressing as claimed in claim 14 or claim 15 wherein said strip(s) are shaped to conform substantially to the shape of the dressing. P:\OPER\CAE\13911-97. AME- 22/12/99 14-
16. A wound dressing as claimed in any one of claims 13-15 wherein said strip or strips are disposed substantially transversely with respect to the protector edge portions.
17. A wound dressing as claimed in any preceding claim wherein said support is adhered to said non-adhesive-coated surface of said dressing layer by means of static force or inherent mechanical attraction between said support and said dressing layer.
18. A wound dressing as claimed in any preceding claim wherein said support layer includes a portion which extends away from said dressing layer to serve as a handle for gripping. S.19. A wound dressing as claimed in any preceding claim further comprising an aperture which extends through said dressing layer and said adhesive layer. :20. A dressing as claimed in claim 19 further comprising reinforcement means in the region of said aperture.
21. A wound dressing substantially as herein described with reference to the Example and/or the accompanying Figures.
22. A method of forming a wound dressing comprising the steps of a) forming a first laminate comprising a dressing layer and a support layer; b) forming a second laminate comprising a layer of a pressure-sensitive adhesive compound and a releasable protector layer covering said adhesive; c) bringing said first and second laminates together such that said pressure sensitive adhesive is adhered to said dressing layer; and wherein P:\OPER\CAE\I3911-97.AME 22/12/99 d) said releasable protector layer cut to form at least first and second edge portions and a separate central portion wherein the central portion covers a portion of the adhesive and the edge portions cover the remaining portion of the adhesive.
23. A method of forming a wound dressing substantially as herein described with reference to the Example and/or the accompanying Figures.
24. A wound dressing when produced by the method of claim 22. DATED this TWENTY-SECOND day of DECEMBER 1999. Smith Nephew plc S* by DAVIES COLLISON CAVE S* Patent Attorneys for the Applicant a a
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9600607.7A GB9600607D0 (en) | 1996-01-12 | 1996-01-12 | Wound dressing |
GB9600607 | 1996-01-12 | ||
GB9609916 | 1996-05-11 | ||
GBGB9609916.3A GB9609916D0 (en) | 1996-05-11 | 1996-05-11 | Wound dressing |
PCT/GB1997/000077 WO1997025012A1 (en) | 1996-01-12 | 1997-01-13 | Wound dressing |
Publications (2)
Publication Number | Publication Date |
---|---|
AU1391197A AU1391197A (en) | 1997-08-01 |
AU716270B2 true AU716270B2 (en) | 2000-02-24 |
Family
ID=26308456
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU13911/97A Ceased AU716270B2 (en) | 1996-01-12 | 1997-01-13 | Wound dressing |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0873098A1 (en) |
JP (1) | JP2000517202A (en) |
CN (1) | CN1212613A (en) |
AU (1) | AU716270B2 (en) |
CA (1) | CA2241791A1 (en) |
MX (1) | MX9805633A (en) |
WO (1) | WO1997025012A1 (en) |
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DE19925973A1 (en) * | 1999-06-08 | 2000-12-14 | Beiersdorf Ag | Film plasters, in particular for covering wounds and preventing or treating blisters, using carrier films with improved sliding properties and good stretchability, achieved by optimizing the surface structure and hardness |
DE19950295A1 (en) * | 1999-10-19 | 2001-04-26 | Beiersdorf Ag | Foil-based dressing material with imprint |
DE102005003391A1 (en) * | 2005-01-24 | 2006-08-03 | Beiersdorf Ag | film plaster |
WO2007034393A2 (en) * | 2005-09-20 | 2007-03-29 | Koninklijke Philips Electronics N.V. | Medical device adhesive backing having a multi-piece support |
FR2893249B1 (en) * | 2005-11-17 | 2008-09-12 | Urgo Sa Lab | DRESSING COMPRISING A THIN FILM APPLICATOR |
DE102006005348A1 (en) * | 2006-02-07 | 2007-08-09 | Paul Hartmann Ag | Foil dressing with improved application aid |
JP5028580B2 (en) * | 2006-09-20 | 2012-09-19 | アルケア株式会社 | Medical patch and its manufacturing method |
JP4867025B2 (en) * | 2007-01-30 | 2012-02-01 | アルケア株式会社 | Catheter fixture |
EP2185111A4 (en) * | 2007-09-06 | 2013-03-20 | Moelnlycke Health Care Ab | Component for affixing an article of medical-technical nature to skin |
US8469935B2 (en) * | 2010-03-11 | 2013-06-25 | Kci Licensing, Inc. | Abdominal treatment systems, delivery devices, and methods |
US9492338B2 (en) | 2011-04-22 | 2016-11-15 | Hisamitsu Pharmaceutical Co., Inc. | Pressure-sensitive adhesive tape package |
CN102488558A (en) * | 2011-12-07 | 2012-06-13 | 唐伊娜 | Body surface skin object fixing and surface skin moving wrinkle limiting device |
EP3354293B1 (en) | 2012-05-23 | 2019-12-11 | Smith & Nephew plc | Apparatuses for negative pressure wound therapy |
EP2950764B1 (en) * | 2013-02-04 | 2019-08-28 | Gsquared Medical LLC | Retractor/stabilizer for excessive and/or redundant tissue |
EP2805698B1 (en) | 2013-05-22 | 2018-04-04 | Adhex Technologies | Wound Dressing |
US10016310B2 (en) | 2014-07-31 | 2018-07-10 | Johnson & Johnson Consumer Inc. | Wound dressing assembly |
US10034799B2 (en) * | 2014-07-31 | 2018-07-31 | Johnson & Johnson Consumer Inc. | Two-stage wound dressing assembly |
MX2018003714A (en) * | 2015-09-24 | 2018-08-01 | Ethicon Llc | Devices for wound closure. |
GB2555584B (en) * | 2016-10-28 | 2020-05-27 | Smith & Nephew | Multi-layered wound dressing and method of manufacture |
CN107374825A (en) * | 2017-07-21 | 2017-11-24 | 傅书华 | A kind of self-defined adhesive bandage machine |
DE102017118964A1 (en) * | 2017-08-18 | 2019-02-21 | Lohmann & Rauscher Gmbh & Co. Kg | ASSOCIATION |
EP3694457A1 (en) * | 2017-10-09 | 2020-08-19 | 3M Innovative Properties Company | Securement dressing with conformal border |
US11439352B2 (en) * | 2018-01-17 | 2022-09-13 | Medtronic Minimed, Inc. | Medical device with adhesive patch longevity |
US20210007899A1 (en) * | 2018-04-02 | 2021-01-14 | Marine Biology & Environmental Technologies, Llc | Medical dressings and uses therof |
EP4117511A4 (en) * | 2020-03-13 | 2024-03-20 | Bionime Usa Corp | Patch and method for using a patch |
TWI733371B (en) * | 2020-03-13 | 2021-07-11 | 華廣生技股份有限公司 | Patch, patch system and method for using a patch |
JP2022151461A (en) * | 2021-03-26 | 2022-10-07 | 弘 福原 | Poultice |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0161865A2 (en) * | 1984-05-03 | 1985-11-21 | Smith and Nephew Associated Companies p.l.c. | Adhesive wound dressing |
WO1994012134A1 (en) * | 1992-11-21 | 1994-06-09 | Smith & Nephew Plc | Wound dressings |
WO1994014393A1 (en) * | 1992-12-24 | 1994-07-07 | Smith & Nephew Plc | Adhesive dressing |
-
1997
- 1997-01-13 WO PCT/GB1997/000077 patent/WO1997025012A1/en not_active Application Discontinuation
- 1997-01-13 CN CN 97192746 patent/CN1212613A/en active Pending
- 1997-01-13 CA CA 2241791 patent/CA2241791A1/en not_active Abandoned
- 1997-01-13 EP EP97900326A patent/EP0873098A1/en not_active Withdrawn
- 1997-01-13 AU AU13911/97A patent/AU716270B2/en not_active Ceased
- 1997-01-13 JP JP09525002A patent/JP2000517202A/en active Pending
-
1998
- 1998-07-10 MX MX9805633A patent/MX9805633A/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0161865A2 (en) * | 1984-05-03 | 1985-11-21 | Smith and Nephew Associated Companies p.l.c. | Adhesive wound dressing |
WO1994012134A1 (en) * | 1992-11-21 | 1994-06-09 | Smith & Nephew Plc | Wound dressings |
WO1994014393A1 (en) * | 1992-12-24 | 1994-07-07 | Smith & Nephew Plc | Adhesive dressing |
Also Published As
Publication number | Publication date |
---|---|
AU1391197A (en) | 1997-08-01 |
CN1212613A (en) | 1999-03-31 |
CA2241791A1 (en) | 1997-07-17 |
MX9805633A (en) | 1998-11-29 |
EP0873098A1 (en) | 1998-10-28 |
JP2000517202A (en) | 2000-12-26 |
WO1997025012A1 (en) | 1997-07-17 |
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Owner name: SMITH AND NEPHEW PLC Free format text: FORMER NAME: SMITH AND NEPHEW PLC |
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FGA | Letters patent sealed or granted (standard patent) | ||
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