# US 12,178,687 B2 · Method and system for providing active tissue site debridement

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- Number: US 12,178,687 B2
- Document ID: US12178687B2
- Status: Granted
- Kind: B2
- Application number: 17/057,543
- Filed: 2019-05-21
- Published: 2021-06-24
- Granted: 2024-12-31
- Earliest claimed: 2018-05-25
- Assignees: Solventum Intellectual Properties Company
- Applicants: Solventum Intellectual Properties Company
- Inventors: Benjamin A. Pratt; Christopher B. Locke; James Seddon
- Web page: https://patentgrep.com/patent/US12178687B2

## 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]
- A61B 17/32: Surgical cutting instruments ({A61B18/042 takes precedence; suture cutters A61B17/0467;} implements for ligaturing and cutting {A61B17/122, A61B17/12; instruments for rupturing the amniotic membrane A61B17/4208; specially adapted knives for eye surgery A61F9/0133})
- A61F 13/00051: {Accessories for dressings}
- 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}
- A61M 1/915: {Constructional details of the pressure distribution manifold}
- A61M 1/92: {with liquid supply means}
- A61M 1/96: {Suction control thereof}
- A61M 1/962: {having pumping means on the suction site, e.g. miniature pump on dressing or dressing capable of exerting suction}
- A61B 2017/00017: {Electrical control of surgical instruments}
- A61B 2017/00544: {pneumatically}
- A61B 2017/00761: {Removing layer of skin tissue, e.g. wrinkles, scars or cancerous tissue}
- A61B 2017/320004: {abrasive}
- A61B 2017/320008: {Scrapers}
- A61M 1/75: {Intermittent or pulsating suction (A61M1/63, A61M1/772 take precedence)}
- A61M 3/02: Enemata; Irrigators
- A61M 2205/05: combined with other kinds of therapy
- A61M 2205/07: having air pumping means
- A61M 2205/106: reciprocating
- A61M 2205/3576: with non implanted data transmission devices, e.g. using external transmitter or receiver
- 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 wound debridement system includes a wound dressing having an active layer (40) and a wound interface layer (10). The active layer is formed from one or more pneumatic members (45). The pneumatic members are arranged about a film layer (60), by which the pneumatic members are attached to the wound interface layer. A control unit (80) controls a drive unit (70) to intermittently apply pressure to the pneumatic members of the active layer. The pressure applied by the drive unit causes the pneumatic members to expand and contract. This movement of the pneumatic members is transferred to the wound interface layer, causing the wound interface layer to move relative to a tissue site to which the wound dressing is applied. The wound interface layer may be formed having an abrasive wound-facing surface, such that the movement of the wound interface layer causes a mechanical disruption and debridement of debris at the tissue site.

## Claims

### Claim 1

An active debridement wound dressing comprising:
a wound interface layer comprising an abrasive surface configured to contact a wound and mechanically debride the wound when the wound interface layer moves relative to the wound; and
an active layer coupled to the wound interface layer and comprising:
a fenestrated film fixed to the wound interface layer; and
a pneumatic structure comprising a plurality of pneumatic segments fixed to the fenestrated film, the pneumatic structure configured to expand and collapse responsive to a pneumatic pressure applied to the active layer, thereby causing the wound interface layer to move relative to the wound and mechanically debride the wound.

### Claim 2 (depends on 1)

The active debridement wound dressing of claim 1, wherein the pneumatic structure further comprises:
a central pneumatic hub; and
the plurality of pneumatic segments comprise a plurality of radial segments extending radially outward from the central hub.

### Claim 3 (depends on 1)

The active debridement wound dressing of claim 1, further comprising:
a first encapsulation layer located on a first side of the active layer between the active layer and the wound interface layer; and
a second encapsulation layer located on a second side of the active layer opposite the wound interface layer;
wherein the first encapsulation layer and the second encapsulation layer encapsulate the active layer and pneumatically isolate the active layer from the wound.

### Claim 4 (depends on 1)

The active debridement wound dressing of claim 1, further comprising a control unit coupled to the active layer and configured apply a positive or negative pneumatic pressure to the active layer.

### Claim 5 (depends on 4)

The active debridement wound dressing of claim 4, wherein the control unit is configured to communicate with a driver unit outside the wound dressing and to apply the pneumatic pressure to the active layer upon receiving a control signal from the driver unit.

### Claim 6 (depends on 1)

The active debridement wound dressing of claim 1, wherein the pneumatic structure is configured to oscillate between an expanded size or shape and a collapsed size or shape to impart oscillating movement to the wound interface layer.

### Claim 7

An active debridement wound therapy system comprising:
a wound dressing comprising:
a wound interface layer comprising an abrasive surface configured to contact a wound and mechanically debride the wound when the wound interface layer moves relative to the wound; and
an active layer coupled to the wound interface layer and comprising a pneumatic structure having a central pneumatic hub and a plurality of radial segments extending radially outward from the central hub, the pneumatic structure configured to expand and collapse responsive to a pneumatic pressure applied to the active layer, thereby causing the wound interface layer to move relative to the wound and mechanically debride the wound; and
a therapy unit separate from the wound dressing and configured to cause the pneumatic pressure to be applied to the active layer.

### Claim 8 (depends on 7)

The active debridement wound therapy system of claim 7, wherein the wound dressing comprises a control unit coupled to the active layer and configured to communicate with the therapy unit;
wherein the control unit is configured to apply the pneumatic pressure to the active layer upon receiving a control signal from the therapy unit.

### Claim 9 (depends on 7)

The active debridement wound therapy system of claim 7, the wound dressing further comprising:
a first encapsulation layer located on a first side of the active layer between the active layer and the wound interface layer; and
a second encapsulation layer located on a second side of the active layer opposite the wound interface layer;
wherein the first encapsulation layer and the second encapsulation layer encapsulate the active layer and pneumatically isolate the active layer from the wound.

### Claim 10 (depends on 7)

The active debridement wound therapy system of claim 7, wherein the pneumatic structure is configured to collapse upon application of negative pressure to the active layer and return to a non-collapsed size or shape when the negative pressure is removed.

### Claim 11 (depends on 7)

The active debridement wound therapy system of claim 7, wherein the pneumatic structure is configured to expand upon application of positive pressure to the active layer and return to a non-expanded size or shape when the positive pressure is removed.

### Claim 12 (depends on 7)

The active debridement wound therapy system of claim 7, wherein the pneumatic structure is configured to oscillate between an expanded size or shape and a collapsed size or shape to impart oscillating movement to the wound interface layer.