Wound cleansing apparatus in-situ

Patent metadata

Field	Value
Publication number	US-11857746-B2
Application number	US-202017008190-A
Country	US
Kind code	B2
Filing date	Aug 31, 2020
Priority date	Oct 28, 2003
Publication date	Jan 2, 2024
Grant date	Jan 2, 2024

Abstract

An apparatus for cleansing wounds, in which wound exudate is removed from a wound bed and selectively cleansed and returned to the wound. The cleansing means removes materials deleterious to wound healing, and the cleansed fluid, still containing materials that are beneficial in promoting wound healing, is returned to the wound bed. The associated wound dressing and cleansing means are conformable to the wound, and may have irrigant fluid circulated from a reservoir by a device for moving fluid through a flow path which passes through the dressing and a means for fluid cleansing and back to the dressing.

First claim

What is claimed is:

1. A negative pressure wound therapy system, comprising:
a wound dressing configured to cover and protect a wound, the wound dressing comprising:
a backing layer;
a wound contact layer configured to contact the wound; and
an absorbent material positioned between the wound contact layer and the backing layer; and

a negative pressure source configured to apply negative pressure to the wound, the negative pressure source being integral with the wound dressing, wherein the negative pressure source comprises:
a manually compressible chamber; and
a one-way valve;
wherein a compressive force applied to the manually compressible chamber moves fluid through the one-way valve and release of the compressive force on the manually compressible chamber creates a negative pressure at the wound.

2. The system of claim 1 , wherein the negative pressure source is mounted to the backing layer.

3. The system of claim 1 , wherein the wound dressing comprises a vent configured to vent off excess fluid.

4. The system of claim 1 , further comprising an adhesive layer, wherein the adhesive layer is configured to attach the wound dressing to the skin around the wound.

5. A method of treating a wound, comprising:
positioning a wound dressing over a wound, the wound dressing comprising:
a backing layer;
a wound contact layer configured to contact the wound; and
an absorbent material positioned between the wound contact layer and the backing layer;

applying negative pressure to the wound through the wound dressing, wherein the negative pressure is applied by a negative pressure source integral with the wound dressing, wherein the negative pressure source comprises:
a manually compressible chamber; and
a one-way valve;
wherein applying negative pressure to the wound through the wound dressing comprises applying a compressive force to the manually compressible chamber to move fluid through the one-way valve and releasing the compressive force on the manually compressible chamber creates a negative pressure at the wound.

6. The method of claim 5 , wherein the negative pressure is applied through the absorbent material to the wound so that wound exudate is absorbed within the absorbent material.

7. A negative pressure wound therapy system, comprising:
a wound dressing configured to cover and protect a wound; and
a pump configured to apply negative pressure to the wound, the pump being integral with the wound dressing, the pump comprising:
a compressible chamber; and
a one-way valve;
wherein a compressive force applied to the compressible chamber moves fluid through the one-way valve and creates a negative pressure at the wound.

Assignees

• Smith & Nephew

Inventors

• Blott Patrick Lewis
• Greener Bryan
• Hartwell Edward Yerbury
• Nicolini Derek
• Walker Tina Michelle
• Lee-Webb Julian

Classifications

• A61M3/0229 Primary

  Devices operating in a closed circuit, i.e. recycling the irrigating fluid · CPC title

• A61F13/00068

  Human Necessities · mapped topic

• A61F13/0206

  with absorbent fibrous layers, e.g. woven or non-woven absorbent pads or island dressings · CPC title

• A61F13/0213

  the fluid retention member being a layer of hydrocolloid, gel forming material · CPC title

• A61F13/0216

  Human Necessities · mapped topic