Negative pressure wound therapy device

• US 20090299251A1
• Filed: 05/27/2009
• Published: 12/03/2009
• Est. Priority Date: 05/27/2008
• Status: Abandoned Application

• Current Assignee: Smith+Nephew, Inc.
• Original Assignee: Smith+Nephew, Inc.
• Inventors: Buan, John
• Application Number:
  US12/455,013
• Publication Number:
  US 20090299251A1
• Time in Patent Office: Days
• US Class Current: 602/43
• CPC Class Codes: A61F 13/00055 Saturation indicators
• CPC Class Codes: A61F 13/0203 with fluid retention members
• CPC Class Codes: A61F 13/0206 with absorbent fibrous layers, e.g. woven or non-woven absorbent pads or island dressings
• CPC Class Codes: A61F 13/0213 the fluid retention member being a layer of hydrocolloid, gel forming material
• 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: A61L 15/18 containing inorganic materials
• CPC Class Codes: A61L 15/26 Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof A61L15/225 takes precedence
• CPC Class Codes: A61L 15/28 Polysaccharides or their derivatives A61L15/225 takes precedence
• CPC Class Codes: A61L 15/58 Adhesives
• CPC Class Codes: 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
• CPC Class Codes: A61M 1/985 the dressing itself forming the collection container
• CPC Class Codes: A61M 2205/15 Detection of leaks
• CPC Class Codes: A61M 2205/3331 Pressure; Flow

Abstract

A wound therapy device which may include a gasket distally spaced from an absorptive pad and an edge of a backing material. The device may also include an adaptor and tube portion with a connector located distally from a port hole in the backing material. In addition, a method of manufacturing a wound therapy device including using a port hole as a registration point.

Claims

1. A wound therapy device comprising:

a backing material having a shape with an edge and a first side having an adhesive and a second side;

a port hole disposed in the backing material and an adaptor disposed in the port hole;

an absorptive pad disposed on the first side of the backing material such that a portion of the absorptive pad is disposed under the adaptor; and

,

a gasket disposed on the backing material distally between the absorptive pad and the edge.

2. The device of claim 1 wherein the gasket comprises a hydrogel.

3. The device of claim 2 further comprising the absorptive pad having a shape and the gasket has a shape, and wherein the shape of the absorptive pad is substantially the same as the shape of the gasket.

4. The device of claim 3 further comprising the shape of the absorptive pad being an oval.

5. The device of claim 2 further comprising the gasket having a width of approximately ⅜

of an inch.

6. The device of claim 5 further comprising the gasket having a thickness of approximately 30 mils.

7. The device of claim 1 further comprising the gasket being disposed immediately adjacent the absorptive pad.

8. The device of claim 1 further comprising a wound interface layer disposed around an exposed portion of the absorptive pad.

9. The device of claim 8 wherein the wound interface layer is a silver plated mesh.

10. The device of claim 1 wherein the backing material is semi-permeable.

11. The device of claim 1 further comprising a tubing portion having a first end communicating with the adaptor and second end communicating with a connector.

12. The device of claim 1 wherein the adaptor further comprises fluid impermeable membrane.

13. The device of claim 1 further comprising a viewing portal disposed in the backing material proximate the adaptor.

14. The device of claim 1 further comprising a liner disposed on at least a portion of the adhesive.

15. The device of claim 14 further comprising a second liner disposed on a portion of the edge.

16. The device of claim 15 further comprising a third liner disposed on a second portion of the edge.

17. A wound therapy device comprising:

a backing material having a shape with an edge and a first side having an adhesive and a second side;

a port hole disposed in the adhesive backing material, wherein an adaptor is disposed within the port hole and communicating with a connector with a tube having a length such that the connector is distally located form the port hole;

an absorptive pad disposed on the first side of the backing material such that a portion of the absorptive pad is disposed under the port hole; and

,

a gasket disposed distally on the backing material between the absorptive pad and the edge.

18. The device of claim 17 wherein the gasket comprises a hydrogel.

19. The device of claim 17 further comprising the absorptive pad having a shape and the gasket has a shape, and wherein the shape of the absorptive pad is substantially the same as the shape of the gasket.

20. The device of claim 19 further comprising the shape of the absorptive pad being an oval.

21. The device of claim 18 further comprising the gasket having a width of approximately ⅜

of an inch.

22. The device of claim 21 further comprising the gasket having a thickness of approximately 30 mils.

23. The device of claim 17 further comprising the gasket being disposed immediately adjacent the absorptive pad.

24. The device of claim 17 further comprising a mesh disposed around an exposed portion of the absorptive pad.

25. The device of claim 17 wherein the port further comprises fluid impermeable membrane.

26. The device of claim 17 further comprising a viewing portal disposed in the backing material proximate the adaptor.

27. The device of claim 17 further comprising a liner disposed on at least a portion of the adhesive.

28. The device of claim 27 further comprising a second liner disposed on a portion of the edge.

29. The device of claim 28 further comprising a third liner disposed on a second portion of the edge.

30. A method of making a wound therapy device comprising the steps of:

applying a port hole to an adhesive substrate;

using the port hole as a registration point for applying a gasket material;

applying a predetermined thickness of the gasket material in a predetermined shape at a distance around the port hole;

applying a liner to the adhesive substrate;

rolling the adhesive substrate.

31. The method of claim 30 wherein the step of applying the gasket material comprises pouring the gasket material.

32. The method of claim 30 further comprising the step of applying a second liner on a portion of an edge of the adhesive substrate.

33. The method of claim 32 further comprising the step of applying a third liner on a second portion of the edge of the adhesive substrate.