Reduced pressure treatment system

• US 10,105,471 B2
• Filed: 04/09/2013
• Issued: 10/23/2018
• Est. Priority Date: 04/05/2004
• Status: Active Grant

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Inventors: Weston, Richard Scott
• Primary Examiner(s): Vasat, Peter S
• Application Number:
  US13/859,670
• Publication Number:
  US 20130274688A1
• Time in Patent Office: 2,023 Days
• CPC Class Codes: 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]
• CPC Class Codes: A61F 5/048 Traction splints
• CPC Class Codes: A61M 1/732 Visual indicating means for vacuum pressure
• CPC Class Codes: A61M 1/743 by changing the cross-section of the line, e.g. flow regulating valves A61M1/7413 takes precedence
• CPC Class Codes: A61M 1/782 using valves with freely moving parts, e.g. float valves
• CPC Class Codes: A61M 1/79 Filters for solid matter specially adapted for dental use A61C17/065
• CPC Class Codes: A61M 1/82 Membrane pumps, e.g. bulbs
• CPC Class Codes: A61M 1/96 Suction control thereof
• CPC Class Codes: A61M 1/962 having pumping means on the suction site, e.g. miniature pump on dressing or dressing capable of exerting suction
• CPC Class Codes: A61M 1/98 Containers specifically adapted for negative pressure wound therapy
• CPC Class Codes: A61M 1/982 with means for detecting level of collected exudate

Abstract

A wound treatment appliance is provided for treating all or a portion of a wound. In some embodiments, the appliance comprises a cover or a flexible overlay that covers all or a portion of the wound for purposes of applying a reduced pressure to the covered portion of the wound. In other embodiments, the wound treatment appliance also includes a vacuum system to supply reduced pressure to the site of the wound in the volume under the cover or in the area under the flexible overlay. Methods are provided for using various embodiments of the invention.

Claims

1. A reduced-pressure treatment system for treating a tissue site on a patient, the reduced-pressure treatment system comprising:

an interface member sized and configured to be placed in contact with the tissue site, the interface member configured to permit the flow of wound exudate in only one direction;

a gasket positionable around a perimeter of the tissue site;

a cover positionable over the interface member and releasably sealable to the gasket, wherein the cover is configured to create a sealed space between the cover and the tissue site;

a reduced-pressure source;

a reduced-pressure supply conduit configured to supply reduced-pressure from the reduced-pressure supply source to the sealed space;

wherein when reduced-pressure is supplied via the reduced-pressure supply conduit to the sealed space, wound exudate is prevented from passing from the sealed space into the reduced-pressure supply conduit;

a port on the cover; and

a member at the port positioned in a fluid path, the member configured to prevent passage of wound exudate.

2. The reduced-pressure treatment system of claim 1, wherein the cover is positioned over the interface member and is releasably sealed to the gasket by a first adhesive between the cover and the gasket.

3. The reduced-pressure treatment system of claim 2, wherein the gasket is releasably attached around a perimeter of the tissue site, and wherein the gasket has a first side and a second, patient-facing side.

4. The reduced-pressure treatment system of claim 3, wherein the gasket is sealed relative to tissue of the patient surrounding the wound using a second adhesive between the second, patient-facing side of the gasket and the tissue of the patient surrounding the wound.

5. The reduced-pressure treatment system of claim 2, wherein the gasket is secured relative to tissue of the patient surrounding the wound using a second adhesive.

6. The wound therapy system of claim 2, wherein the gasket is sealed to the interface member.

7. The wound therapy system of claim 6, wherein the gasket is sealed to the interface member by a second adhesive.

8. The wound therapy system of claim 7, wherein the gasket is only in contact with the cover and the interface member when the interface member is placed in contact with the tissue site, the gasket is positioned around a perimeter of the tissue site, and the cover is positioned over the interface member and releasably sealed to the gasket.