Three-dimensional porous film contact layer with improved wound healing

• US 10,258,779 B2
• Filed: 02/17/2017
• Issued: 04/16/2019
• Est. Priority Date: 09/05/2008
• Status: Active Grant

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Inventors: Heagle, David G.
• Primary Examiner(s): Zalukaeva, Tatyana
• Assistant Examiner(s): Treyger, Ilya Y
• Application Number:
  US15/436,469
• Publication Number:
  US 20170252545A1
• Time in Patent Office: 788 Days
• CPC Class Codes: A61F 13/02 Adhesive bandages or dressings
• 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: A61M 1/915 Constructional details of the pressure distribution manifold
• CPC Class Codes: A61M 2205/058 with ultrasound therapy
• CPC Class Codes: A61M 37/00 Other apparatus for introducing media into the body for reproduction or fertilisation A61B17/425; apparatus for iontophoresis or cataphoresis A61N1/30; Percutany, i.e. introducing medicines into the body by diffusion through the skin salt baths A61H33/04
• CPC Class Codes: A61N 2007/0017 Wound healing
• CPC Class Codes: A61N 7/00 Ultrasound therapy lithotripsy A61B17/22, A61B17/225; massage using supersonic vibration A61H23/00 ; using ultrasound for introducing media into the body A61M37/0092

Abstract

A wound dressing has a micro-architecture to produce appropriate strains in cells to promote the healing a wound. The apparatus includes a wound cover for defining a reservoir over a wound in which a negative pressure may be maintained by forming a substantially fluid-tight seal around the wound, a vacuum source in fluid communication with the reservoir and suitable for providing an appropriate negative pressure to the reservoir to stimulate healing of the wound, and a porous structure positioned in contact with the wound for delivering micro-mechanical forces to localized areas of the wound. The porous structure comprises a three-dimensional film material having directional apertures formed therein.

Claims

1. A method of treating a wound with reduced pressure, the method comprising:

applying a three-dimensional film material to a wound, the three-dimensional film material having a plurality of passages defined between a male face and an opposite female face thereof, wherein the three-dimensional film material is positioned such that the male face is in contact with the wound, and wherein each of the passages includes an aperture at an apex oriented on the male face and a base oriented on the female face; and

supplying vacuum from a vacuum source in fluid communication with the three-dimensional film material to apply a negative pressure through the plurality of passages to the wound to stimulate healing of the wound.

2. The method according to claim 1, further comprising forming a reservoir over a wound in which a negative pressure may be maintained by forming a substantially fluid-tight seal around the wound with a wound cover.

3. The method according to claim 2, wherein the reservoir comprises a wound filler.

4. The method according to claim 2, wherein vacuum is supplied through a port in communication with the wound cover.

5. The method according to claim 4, wherein vacuum is supplied through a fluid conduit in fluid communication with the vacuum source and the port.

6. The method according to claim 1, further comprising delivering energy to the three-dimensional film material with an energy source and a transmitter.

7. The method according to claim 6, wherein the transmitter comprises an ultrasonic horn.