Disruptive dressing for use with negative pressure and fluid instillation

Patent metadata

Field	Value
Publication number	US-12408939-B2
Application number	US-202016923651-A
Country	US
Kind code	B2
Filing date	Jul 8, 2020
Priority date	May 9, 2014
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

A method and apparatus for disrupting material at a tissue site is described. A contact layer may be selected for use on the tissue site and positioned adjacent to the tissue site. The contact layer may include walls defining a plurality of through-holes. A sealing member may be positioned over the contact layer and sealed to tissue surrounding the tissue site to form a sealed space enclosing the contact layer. A negative-pressure source may be fluidly coupled to the sealed space. The negative-pressure source may supply negative pressure to the sealed space and the contact layer to draw tissue into the through-holes to form nodules. The negative pressure may be vented from the sealed space to release the nodules.

First claim

What is claimed is:

1. A system for debriding a tissue site, comprising:
a cover adapted to form a sealed space over the tissue site for receiving a negative pressure from a negative-pressure source; and
a tissue interface having a manifold and a debridement tool, the manifold and the debridement tool being integral components of the tissue interface;
the manifold adapted to deliver negative pressure to the tissue site;
the debridement tool adapted to be positioned between the manifold and the tissue site, the debridement tool comprising a felted foam;
a plurality of holes extending through the debridement tool, the plurality of holes being separated from each other by walls, the walls having transverse surfaces extending perpendicular to a surface of the debridement tool that form cutting edges with the surface of the debridement tool, and wherein the plurality of holes have a perforation shape factor that allows the plurality of holes to collapse from a relaxed position to a contracted position in response to an application of negative pressure to the sealed space and to return from the contracted position to the relaxed position in response to a removal of negative pressure from the sealed space; and
the plurality of holes being adapted to generate macro-pressure points in the tissue site in the contracted position and the cutting edges being adapted to disrupt the macro-pressure points in the tissue site in response to movement of the debridement tool between the relaxed position and the contracted position.

2. The system of claim 1 , wherein the plurality of holes are adapted to collapse from the relaxed position to the contracted position generally perpendicular to a line of symmetry of the debridement tool.

3. The system of claim 1 , wherein the plurality of holes have the perforation shape factor and a strut angle adapted to collapse the plurality of holes from the relaxed position to the contracted position.

4. The system of claim 3 , wherein the strut angle is about 90 degrees.

5. The system of claim 3 , wherein the strut angle is less than about 90 degrees.

6. The system of claim 1 , wherein:
the plurality of holes are adapted to have the perforation shape factor and a strut angle that allows the plurality of holes to collapse from the relaxed position to the contracted position; and
the plurality of holes are adapted to collapse from the relaxed position to the contracted position generally perpendicular to a line of symmetry of the debridement tool.

7. The system of claim 1 , further comprising a fluid source adapted to be fluidly coupled to the sealed space to provide fluid to the sealed space.

8. The system of claim 1 , wherein the plurality of holes have an average effective diameter of about 5 mm.

9. The system of claim 1 , wherein the plurality of holes are formed in two or more parallel rows.

10. The system of claim 1 , wherein the perforation shape factor of each hole of the plurality of holes is less than about 1.

11. The system of claim 1 , wherein a thickness of the debridement tool is about 15 mm.

12. The system of claim 1 , wherein a firmness factor of the debridement tool is about 5.

13. The system of claim 1 , wherein a firmness factor of the debridement tool is about 3.

14. The system of claim 1 , wherein a shape of each hole of the plurality of holes is hexagonal.

15. The system of claim 1 , wherein a shape of each hole of the plurality of holes is elliptical.

16. The system of claim 1 , wherein a shape of each hole of the plurality of holes is circular.

17. The system of claim 1 , wherein a shape of each hole of the plurality of holes is triangular.

Assignees

• Solventum Intellectual Properties Company

Inventors

• Ingram Shannon C
• Locke Christopher Brian
• Arnold Peter
• Robinson Timothy Mark
• Carroll Christopher Allen
• Manwaring Michael E

Classifications

• A61F13/05

  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 title

• A61M1/96

  Suction control thereof · CPC title

• A61M1/92

  with liquid supply means · CPC title

• A61M1/915

  Constructional details of the pressure distribution manifold · CPC title

• A61B2017/32006

  with a cutting strip, band or chain, e.g. like a chainsaw · CPC title