# US 11,998,426 B2 · Cutting template for a negative pressure wound therapy drape

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- Number: US 11,998,426 B2
- Document ID: US11998426B2
- Status: Granted
- Kind: B2
- Application number: 17/045,213
- Filed: 2019-04-05
- Published: 2021-06-03
- Granted: 2024-06-04
- Earliest claimed: 2018-04-12
- Assignees: KCI Licensing, Inc.
- Applicants: Kci Licensing, Inc.
- Inventors: Christopher A. Carroll; Matthew F. Cavanaugh, II; Shannon C. Ingram; Justin Rice
- Web page: https://patentgrep.com/patent/US11998426B2

## CPC

- A61F 13/00051: {Accessories for dressings}
- 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]
- A61B 46/20: specially adapted for patients
- A61F 13/15804: {Plant, e.g. involving several steps}
- A61F 15/001: {Packages or dispensers for bandages, cotton balls, drapes, dressings, gauze, gowns, sheets, sponges, swabsticks or towels (A61F15/007 takes precedence)}
- A61M 1/90: {Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing}
- A61F 13/15723: {Partitioning batts; Cutting}
- 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)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

A cutting template for use with a negative pressure wound therapy system includes a substantially rigid body. The body includes a top surface, a bottom surface, a height, and a recess. The top surface is configured to engage a drape layer. The bottom surface is configured to engage a dressing layer. The height is defined between the top surface and the bottom surface. The height is configured to create a gap between the drape layer and the dressing layer. The recess is disposed substantially about a perimeter of the body. The recess is configured to receive an edge of a cutting tool so that an opening is formed in the drape layer when the edge is traversed about the perimeter.

## Claims

### Claim 1

A cutting template for use with a negative pressure wound therapy system, the cutting template comprising:
a substantially rigid body, the body comprising:
a top surface configured to engage a drape layer;
a bottom surface configured to engage a dressing layer;
a height defined between the top surface and the bottom surface, the height configured to create a gap between the drape layer and the dressing layer;
a first annular surface disposed between the top surface and the bottom surface; and
a second annular surface contiguous with the top surface and extending towards the bottom surface; and
a recess disposed substantially about a perimeter of the body;
wherein the recess is configured to receive an edge of a cutting tool so that an opening is formed in the drape layer when the edge is traversed about the perimeter, and wherein at least part of the recess is formed between the first annular surface and the second annular surface.

### Claim 2 (depends on 1)

The cutting template of claim 1, wherein the bottom surface comprises a dimple protruding from the bottom surface.

### Claim 3 (depends on 1)

The cutting template of claim 1, wherein the top surface comprises a plurality of graduation marks, each of the plurality of graduation marks corresponding with a circumferential location about the top surface.

### Claim 4 (depends on 1)

The cutting template of claim 1, further comprising a hole centered on a center point of the top surface and extending from the top surface through the body to the bottom surface.

### Claim 5 (depends on 1)

The cutting template of claim 1, wherein the bottom surface is at least one of textured and coated with a non-slip coating.

### Claim 6

A cutting template for use with a negative pressure wound therapy system, the cutting template comprising:
a top surface configured to interface with a drape;
a bottom surface configured to interface with a dressing;
a first annular surface contiguous with the bottom surface and extending orthogonally from the bottom surface towards the top surface, the first annular surface defined by a first diameter;
a second annular surface contiguous with the top surface and extending orthogonally from the top surface towards the bottom surface, the second annular surface defined by a second diameter different from the first diameter; and
a lip surface contiguous with the first annular surface and the second annular surface.

### Claim 7 (depends on 6)

The cutting template of claim 6, wherein:
the top surface is substantially disposed along a first plane; and
the lip surface is substantially disposed along a second plane substantially parallel to the first plane.

### Claim 8 (depends on 7)

The cutting template of claim 7, wherein:
the bottom surface is substantially disposed along a third plane; and
a first distance between the first plane and the second plane is less than a second distance between the third plane and the second plane.

### Claim 9 (depends on 6)

The cutting template of claim 6, wherein:
the top surface has a first surface roughness; and
the bottom surface has a second surface roughness greater than the first surface roughness.

### Claim 10 (depends on 6)

The cutting template of claim 6, wherein the cutting template is constructed from a biocompatible polymer.

### Claim 11

A cutting template for use with a negative pressure wound therapy system, the cutting template comprising:
a substantially rigid body, the body comprising:
a top surface configured to engage a drape layer;
a bottom surface configured to engage a dressing layer;
a height defined between the top surface and the bottom surface, the height configured to create a gap between the drape layer and the dressing layer;
a first annular surface disposed between the top surface and the bottom surface; and
a second annular surface disposed between the top surface and the bottom surface; and
a recess disposed substantially about a perimeter of the body;
wherein the recess is configured to receive an edge of a cutting tool so that an opening is formed in the drape layer when the edge is traversed about the perimeter, and wherein at least part of the recess is formed between the first annular surface and the second annular surface.

### Claim 12

A cutting template for use with a negative pressure wound therapy system, the cutting template comprising:
a substantially rigid body, the body comprising:
a top surface configured to engage a drape layer;
a bottom surface configured to engage a dressing layer;
a height defined between the top surface and the bottom surface, the height configured to create a gap between the drape layer and the dressing layer;
a first annular surface contiguous with the bottom surface and extending orthogonally from the bottom surface towards the top surface, the first annular surface defined by a first diameter; and
a second annular surface contiguous with the top surface and extending orthogonally from the top surface towards the bottom surface, the second annular surface defined by a second diameter different from the first diameter; and
a recess disposed substantially about a perimeter of the body;
wherein the recess is configured to receive an edge of a cutting tool so that an opening is formed in the drape layer when the edge is traversed about the perimeter, wherein one of the first annular surface and the second annular surface is inset relative to the other of the first annular surface and the second annular surface to form the recess.

### Claim 13

A kit for use with a negative pressure wound therapy device, the kit comprising:
a package defining a sterilized interior environment;
a dressing layer disposed within the sterilized interior environment;
a drape layer disposed within the sterilized interior environment; and
a cutting template disposed within the sterilized interior environment;
wherein the cutting template comprises a top surface, a bottom surface, and a recess disposed about a perimeter of the cutting template, the recess configured to receive an edge of a cutting tool, and wherein:
the top surface is configured to interface with the drape layer,
the bottom surface is configured to interface with the dressing layer, and
the cutting template further comprises a first annular surface contiguous with the bottom surface and extending orthogonally from the bottom surface towards the top surface, and a second annular surface contiguous with the top surface and extending orthogonally from the top surface towards the bottom surface.

### Claim 14 (depends on 13)

The kit of claim 13, wherein the drape layer is configured to be cut by the cutting tool when the edge engages the recess and is traversed about the perimeter.

### Claim 15 (depends on 13)

The kit of Claim 13, wherein:
the cutting template comprises a lip surface contiguous with the first annular surface and the second annular surface;
the top surface is substantially disposed along a first plane; and
the lip surface is substantially disposed along a second plane substantially parallel to the first plane.

### Claim 16

A method of cutting a drape for use with a negative pressure wound therapy device, the method comprising the steps of:
placing a cutting template on a dressing;
placing a drape over the cutting template such that the drape covers the cutting template and the dressing;
pressing an implement against the drape such that the implement presses the drape towards the cutting template, thereby causing the drape to be cut;
rotating, after pressing the implement against the drape such that the implement presses the drape towards the cutting template, the implement about the cutting template thereby causing a cutout to be separated from the drape and an aperture to be simultaneously formed in the drape;
removing the cutout from the aperture;
sealing a negative pressure lumen of the negative pressure wound therapy device about the aperture;
rotating, prior to placing the cutting template on the dressing, the cutting template along a perimeter of a wound bed; and
placing, prior to placing the cutting template on the dressing and after rotating the cutting template along the perimeter of the wound bed, the dressing over at least a portion of the wound bed.

### Claim 17 (depends on 16)

The method of claim 16, further comprising the step of locating the cutting template on the dressing such that a dimple on the cutting template is received in a divot on the dressing.