# US 10,945,889 B2 · Releasable medical drapes

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- Number: US 10,945,889 B2
- Document ID: US10945889B2
- Status: Granted
- Kind: B2
- Application number: 15/600,451
- Filed: 2017-05-19
- Published: 2017-09-07
- Granted: 2021-03-16
- Earliest claimed: 2011-12-16
- Assignees: KCI Licensing, Inc.
- Applicants: KCI Licensing, Inc.
- Inventors: Christopher Brian Locke; Timothy Mark Robinson; Li Yao
- Web page: https://patentgrep.com/patent/US10945889B2

## CPC

- A61F 13/05: specially adapted for use with sub-pressure or over-pressure therapy, wound drainage or wound irrigation, e.g. for use with negative-pressure wound therapy [NPWT]
- A61F 13/025: {having a special distribution arrangement of the adhesive}
- A61F 13/0253: {characterized by the adhesive material}
- Y10T 156/1056: Perforating lamina
- 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 (dental prosthetics A61C)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A releasable medical drape, and systems and methods having the same, includes at least a liquid-impermeable, vapor-permeable layer, a pressure-sensitive adhesive layer, and a soft-gel layer having a plurality of apertures. The soft-gel layer is configured to be disposed adjacent to a tissue site. A portion of the pressure-sensitive adhesive layer extends through the plurality of apertures in the soft-gel layer to contact the tissue site. The soft-gel layer forms a good seal with the tissue site and the pressure-sensitive adhesive layer extending through the plurality of apertures forms a firm—but releasable—coupling with the tissue site.

## Claims

### Claim 1

A method of treating a tissue site, the method comprising:
disposing a manifold proximate to the tissue site for distributing reduced pressure;
covering the manifold and at least a portion of the tissue site with a releasable medical drape, wherein the releasable medical drape comprises:
a liquid-impermeable, vapor-permeable layer having a first side and a second side,
a pressure-sensitive adhesive layer having a first side and a second side, wherein the first side of the pressure-sensitive adhesive layer is coupled to the second side of the liquid-impermeable, vapor-permeable layer,
a soft-gel layer having a plurality of apertures, a first side, and a second side, wherein the first side of the soft-gel layer is coupled to the second side of the pressure-sensitive adhesive layer, and
wherein the pressure-sensitive adhesive layer is configured to extend at least partially through the plurality of apertures in the soft-gel layer in response to a force applied to the first side of the liquid-impermeable, vapor-permeable layer;
applying a force to the first side of the liquid-impermeable, vapor-permeable layer to cause at least a portion of the pressure-sensitive adhesive layer to extend into the plurality of apertures and into contact with the tissue site; and
delivering reduced pressure to the manifold.

### Claim 2 (depends on 1)

The method of claim 1, wherein:
the soft-gel layer comprises silicone;
the pressure-sensitive adhesive layer comprises an acrylic adhesive; and
the liquid-impermeable, vapor-permeable layer comprises a polyurethane film having a moisture vapor transfer rate greater than or equal to 300 g/m2/24 hrs.

### Claim 3 (depends on 1)

The method of claim 1, wherein the first side of the pressure-sensitive adhesive layer is coupled to the second side of the liquid-impermeable, vapor-permeable layer and the first side of the soft-gel layer is coupled to the second side of the pressure-sensitive adhesive layer.

### Claim 4

A method of manufacturing a releasable medical drape, the method comprising:
providing a soft-gel layer having a first side and a second side;
forming a plurality of apertures in the soft-gel layer;
providing a liquid-impermeable, vapor-permeable layer having a first side and a second side;
providing a pressure-sensitive adhesive layer having a first side and a second side;
coupling the first side of the pressure-sensitive adhesive layer to the second side of the liquid-impermeable, vapor-permeable layer so that the pressure-sensitive adhesive layer and the liquid-impermeable, vapor permeable layer are coterminous;
coupling the second side of the pressure-sensitive adhesive layer to the first side of the soft-gel layer so that the pressure-sensitive adhesive layer and the soft-gel layer are coterminous;
providing a first release liner having a first side and a second side;
coupling the soft-gel layer to the first side of the first release liner, wherein the step of forming a plurality of apertures in the soft-gel layer comprises forming a plurality of apertures in the first release liner; and
disposing a second release liner adjacent to the second side of the first release liner to engage portions of the pressure-sensitive adhesive layer extending through the plurality of apertures formed in the soft-gel layer and the first release liner.

### Claim 5 (depends on 4)

The method of claim 4, wherein the first release liner is a polyethylene release liner having a plurality of areas comprising an adhesive release, the method further comprising registering the plurality of areas with the plurality of apertures formed in the soft-gel layer.

### Claim 6

A releasable medical drape for providing a seal over a tissue site on a patient, the releasable medical drape comprising:
a liquid-impermeable, vapor-permeable layer having a first side and a second side;
a first mesh layer having a first side and a second side, wherein the first side of the first mesh layer is coupled to the second side of the liquid-impermeable, vapor-permeable layer, and wherein at least the second side of the first mesh layer is substantially coated with a pressure-sensitive adhesive;
a second mesh layer having a first side and a second side, wherein the first side of the second mesh layer is coupled to the second side of the first mesh layer, and wherein at least the second side of the second mesh layer is substantially coated with a soft-gel; and
wherein the pressure-sensitive adhesive of the first mesh layer is configured to extend at least partially through portions of the second mesh layer when hand pressure is applied to the first side of the liquid-impermeable, vapor-permeable layer.