Granted Patent B2

US 12,678,339 · App. 18/015,260 · Granted Jul 14, 2026

Inventor: Tyler H. Simmons (San Antonio, TX)

Assignee: KCI Manufacturing Unlimited Company

A61F13/05A61F13/00995A61F13/01025A61F2013/00255A61M1/915

Abstract

Claims (41)

1 . A dressing for treating a tissue site, the dressing comprising a tissue interface having:

a first surface configured to face the tissue site;

a second surface opposite the first surface;

a thickness extending from the first surface to the second surface;

a plurality of pores, the plurality of pores having an elliptical shape and a major axis of the plurality of pores being oriented perpendicular to the first surface and the second surface; and

a plurality of holes disposed in the first surface and extending from the first surface toward the second surface to form walls perpendicular to the first surface, a minor axis of the plurality of pores being oriented perpendicular to a surface of the walls of the plurality of holes.

2 . The dressing of claim 1 , wherein the plurality of pores are configured to contract in a direction parallel to the first surface and the second surface.

3 . The dressing of claim 1 , further comprising a dressing length and a dressing width.

4 . The dressing of claim 3 , wherein the major axis is positioned perpendicular to the dressing length and parallel to the thickness.

5 . The dressing of claim 1 , wherein the plurality of pores are configured to contract in a direction perpendicular to the major axis.

6 . The dressing of claim 1 , further comprising a cover layer configured to be disposed over the second surface of the tissue interface.

7 . The dressing of claim 6 , wherein the cover layer comprises a liquid-impermeable film.

8 . The dressing of claim 6 , wherein the cover layer comprises a polymer film.

9 . The dressing of claim 6 , further comprising a fluid port configured to be coupled to the cover layer and fluidly coupled to the tissue interface.

10 . The dressing of claim 1 , wherein the tissue interface comprises a felted foam.

11 . The dressing of claim 10 , wherein the felted foam is felted to a firmness factor of 2 to 10.

12 . The dressing of claim 10 , wherein the felted foam has an uncompressed density of about 0.027 to about 0.034 g/cm 3 .

13 . The dressing of claim 1 , wherein the thickness of the tissue interface is between about 5 mm to about 15 mm.

14 . The dressing of claim 1 , wherein the plurality of holes are blind holes.

15 . The dressing of claim 14 , wherein the plurality of holes have a depth between about 5 mm to about 15 mm.

16 . The dressing of claim 1 , wherein the plurality of holes extend through the thickness of the tissue interface from the first surface to the second surface.

17 . A system for providing negative-pressure therapy to a tissue site, the system comprising:

a tissue interface comprising:

a first surface configured to face the tissue site,

a second surface opposite the first surface,

a thickness extending from the first surface to the second surface,

a plurality of pores, each pore of the plurality of pores having an ovoid shape oriented at an angle to the first surface, and

a plurality of apertures extending from the first surface toward the second surface to form walls perpendicular to the first surface, a minor axis of the plurality of pores being oriented perpendicular to a surface of the walls of the plurality of apertures;

a sealing member configured to be disposed over the tissue interface to create a sealed space; and

a negative pressure source fluidly coupled to the sealed space.

18 . The system of claim 17 , wherein the angle is about 90°.

19 . The system of claim 17 , wherein the plurality of pores are configured to contract in a direction parallel to the first surface and the second surface.

20 . The system of claim 17 , wherein the sealing member is configured to be coupled to the second surface of the tissue interface with an adhesive.

21 . The system of claim 17 , wherein the sealing member comprises a polymer film.

22 . The system of claim 17 , wherein the tissue interface comprises a felted foam.

23 . The system of claim 22 , wherein the felted foam is felted to a firmness factor of 3 to 5.

24 . The system of claim 22 , wherein the felted foam has an uncompressed density of about 0.027 to about 0.034 g/cm 3 .

25 . The system of claim 17 , wherein the tissue interface has a thickness of about 5 mm to about 15 mm.

26 . The system of claim 17 , wherein the plurality of apertures are blind apertures.

27 . The system of claim 26 , wherein the plurality of apertures have a depth between about 5 mm to about 15 mm.

28 . The system of claim 17 , wherein the plurality of apertures extend through the thickness of the tissue interface from the first surface to the second surface.

Assignments (4)

Continuity (2)

References Cited (199)