# US 11,896,462 B2 · Highly conformable wound dressing

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- Number: US 11,896,462 B2
- Document ID: US11896462B2
- Status: Granted
- Kind: B2
- Application number: 16/438,017
- Filed: 2019-06-11
- Published: 2020-01-02
- Granted: 2024-02-13
- Earliest claimed: 2018-06-28
- Assignees: 3M Innovative Properties Company
- Applicants: KCI Licensing, Inc.
- Inventors: James Killingworth Seddon; Colin John Hall
- Web page: https://patentgrep.com/patent/US11896462B2

## CPC

- A61F 13/01029: {made of multiple layers}
- A61F 13/01038: {Flexibility, stretchability or elasticity}
- 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]
- A61M 1/79: {Filters for solid matter (specially adapted for dental use A61C17/065)}
- A61M 1/915: {Constructional details of the pressure distribution manifold}
- A61M 1/78: {Means for preventing overflow or contamination of the pumping systems (combined with drainage containers A61M1/60)}
- A61M 1/80: {Suction pumps (A61M1/64, A61M1/71, A61M60/00 take precedence)}
- A61M 1/92: {with liquid supply means}
- A61M 2205/18: with alarm
- A61M 2205/3344: Measuring or controlling pressure at the body treatment site
- A61M 2205/3351: Controlling upstream pump pressure
- A61M 2205/581: by audible feedback
- A61M 2205/583: by visual feedback
- A61M 2205/8206: battery-operated
- 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)
- 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

In some examples, a dressing filler for treating a tissue site may include a plurality of filler elements and a tissue interface layer. Each of the filler elements may include a first surface and a second surface opposite the first surface and separated from the first surface by a thickness. The tissue interface layer may include a first side configured to be positioned facing the tissue site and a second side positioned opposite the first side. The first surface of each of the filler elements may be coupled to the second side of the tissue interface layer. Also provided are other apparatuses, dressings, systems, and methods suitable for treating a tissue site.

## Claims

### Claim 1

A conformable dressing for treating a tissue site, comprising:
a plurality of discrete manifold members, each discrete manifold member including a first surface and a second surface, the first surface separated from the second surface by a thickness and a perimeter wall extending along or around the thickness;
a carrier including a first side configured to be positioned facing the tissue site and a second side positioned opposite the first side, the carrier expandable between a relaxed state and an expanded state; and
an attachment device comprising a plurality of separate adhesive points configured to separately couple the first surface of each of the plurality of discrete manifold members to the second side of the carrier such that a distance between each of the plurality of discrete manifold members and a distance between each of the plurality of adhesive points increases in the expanded state;
wherein the plurality of discrete manifold members comprises detached blocks of porous material.

### Claim 2 (depends on 1)

The dressing of claim 1, wherein at least two discrete manifold members of the plurality of discrete manifold members are isolated from one another.

### Claim 3 (depends on 1)

The dressing of claim 1, wherein at least two discrete manifold members of the plurality of discrete manifold members are individually movable relative to one another when coupled to the second side of the carrier.

### Claim 4 (depends on 1)

The dressing of claim 1, wherein at least one discrete manifold member of the plurality of discrete manifold members comprises foam.

### Claim 5 (depends on 1)

The dressing of claim 1, wherein the plurality of discrete manifold members comprises a porous material configured to communicate fluid.

### Claim 6 (depends on 1)

The dressing of claim 1, wherein the perimeter wall of each of the plurality of discrete manifold members defines an exterior border separating the plurality of discrete manifold members from one another.

### Claim 7 (depends on 1)

The dressing of claim 1, wherein the thickness is between 20 millimeters to 35 millimeters.

### Claim 8 (depends on 1)

The dressing of claim 1, wherein one or more of the plurality of discrete manifold members have a three-dimensional size between 8 cubic millimeters to 12 cubic millimeters.

### Claim 9 (depends on 1)

The dressing of claim 1, wherein one or more of the perimeter walls of the plurality of discrete manifold members are separated from one another along the entire thickness extending from the first surface to the second surface.

### Claim 10 (depends on 1)

The dressing of claim 1, wherein the first surface of the plurality of discrete manifold members faces opposite the second surface.

### Claim 11 (depends on 1)

The dressing of claim 1, wherein the discrete manifold members in the plurality of discrete manifold members have a same shape.

### Claim 12 (depends on 1)

The dressing of claim 1, wherein the plurality of discrete manifold members have a different shape.

### Claim 13 (depends on 1)

The dressing of claim 1, wherein the discrete manifold members in the plurality of discrete manifold members are arranged in a matrix of rows and columns.

### Claim 14 (depends on 1)

The dressing of claim 1, wherein the plurality of discrete manifold members are arranged in concentric circles.

### Claim 15 (depends on 1)

The dressing of claim 1, wherein the first side of the carrier comprises an adhesive, and wherein the second side of the carrier is configured to be positioned facing outward from the tissue site.

### Claim 16 (depends on 1)

The dressing of claim 1, wherein a separation distance between a first perimeter wall of one of the discrete manifold members and a second perimeter wall of another of the discrete manifold members is greater in the expanded state than the relaxed state.

### Claim 17 (depends on 1)

The dressing of claim 1, wherein the carrier comprises a stretchable material having elastic properties.

### Claim 18 (depends on 17)

The dressing of claim 17, wherein the stretchable material is configured as a layer.

### Claim 19 (depends on 1)

The dressing of claim 1, wherein the carrier comprises a stretchable material configured to stretch in at least one direction.

### Claim 20 (depends on 1)

The dressing of claim 1, wherein the carrier is configured to stretch in at least one direction up to 50 percent in length.

### Claim 21 (depends on 1)

The dressing of claim 1, wherein the carrier comprises a non-stretchable material and an expandable element configured to promote expansion of the carrier.

### Claim 22 (depends on 21)

The dressing of claim 21, wherein the non-stretchable material of the carrier is configured as a layer, and the expandable element comprises a plurality of fenestrations disposed through the carrier, wherein the plurality of fenestrations are configured to deform when a tensile force is applied to the carrier.

### Claim 23 (depends on 22)

The dressing of claim 22, wherein the plurality of fenestrations are aligned to form separable perforations on the carrier.

### Claim 24 (depends on 1)

The dressing of claim 1, wherein the carrier further comprises a plurality of separable perforations disposed through the carrier.

### Claim 25 (depends on 24)

The dressing of claim 24, wherein the separable perforations are positioned between the perimeter walls of the plurality of discrete manifold members.

### Claim 26 (depends on 1)

A system for treating a tissue site with reduced pressure, comprising:
a conformable dressing according to claim 1;
a sealing member configured to cover the dressing and to create a sealed space at the tissue site; and
a reduced pressure source configured to be coupled in fluid communication with the sealed space.

### Claim 27

A dressing filler for treating a tissue site, comprising:
a plurality of filler elements, each filler element including a first surface and a second surface opposite the first surface and separated from the first surface by a thickness; and
a tissue interface layer including a first side configured to be positioned facing the tissue site and a second side positioned opposite the first side, the tissue interface layer expandable between a relaxed state and an expanded state; and
an attachment device comprising a plurality of separate adhesive points configured to separately couple the first surface of each of the plurality of filler elements to the second side of the tissue interface layer such that a distance between each of the plurality of filler elements and a distance between each of the plurality of adhesive points increases in the expanded state;
wherein the plurality of filler elements comprises detached blocks of porous material.

### Claim 28 (depends on 27)

The dressing filler of claim 27, wherein the thickness is between 20 millimeters to 35 millimeters.

### Claim 29 (depends on 27)

The dressing filler of claim 27, wherein at least one filler element of the plurality of filler elements comprises foam.

### Claim 30 (depends on 27)

The dressing filler of claim 27, wherein at least two filler elements of the plurality of filler elements are entirely separated from one another along the thickness extending from the first surface to the second surface.

### Claim 31 (depends on 27)

The dressing filler of claim 27, further comprising a perimeter wall extending along the thickness between the first surface and the second surface of the plurality of filler elements, wherein the perimeter wall defines an exterior border separating the plurality of filler elements from one another.

### Claim 32 (depends on 27)

The dressing filler of claim 27, wherein a separation distance between one of the filler elements and another of the filler elements is greater in the expanded state than the relaxed state.

### Claim 33 (depends on 27)

The dressing filler of claim 27, wherein less than 10 percent of the thickness of at least one filler element of the plurality of filler elements is coupled to the thickness of another filler element of the plurality of filler elements.

### Claim 34 (depends on 33)

The dressing filler of claim 33, wherein the first surface of the at least one filler element of the plurality of filler elements is coupled to the first surface of another filler element of the plurality of filler elements.