Disruptive dressing for use with negative pressure and fluid instillation

Patent metadata

Field	Value
Publication number	US-9918733-B2
Application number	US-201514708109-A
Country	US
Kind code	B2
Filing date	May 8, 2015
Priority date	May 9, 2014
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

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 method for disrupting material at a tissue site, the method comprising:
selecting a contact layer for use on the tissue site, wherein the contact layer comprises walls defining a plurality of through-holes, and wherein the contact layer has a first thickness at ambient pressure;
positioning the contact layer adjacent to the tissue site;
positioning a sealing member over the contact layer;
sealing the sealing member to tissue surrounding the tissue site to form a sealed space enclosing the contact layer;
fluidly coupling a negative-pressure source to the sealed space;
supplying negative pressure to the sealed space and the contact layer;
compressing the contact layer to a second thickness that is less than the first thickness; and
drawing tissue into the through-holes to form nodules having a height no greater than the second thickness.

2. The method of claim 1 , wherein the method further comprises positioning a retainer layer over the contact layer.

3. The method of claim 2 , wherein the method further comprises:
drawing portions of the retainer layer into the plurality of through-holes of the contact layer to form bosses; and
contacting a top of the nodules to limit a height of the nodules.

4. The method of claim 1 , wherein the method further comprises rupturing debris on the nodules.

5. The method of claim 1 , wherein the method further comprises removing debris from a surface of the tissue site.

6. The method of claim 1 , wherein the method further comprises applying force to material at the tissue site through the through-holes.

7. The method of claim 1 , wherein the method further comprises debriding the nodules.

8. The method of claim 1 , wherein the method further comprises channeling negative pressure through the plurality of through-holes of the contact layer in response to supplying negative pressure to the sealed space to generate concentrated stresses in tissue adjacent to the plurality of through-holes.

9. The method of claim 1 , wherein the method further comprises generating macro-pressure points in the tissue adjacent to the plurality of through-holes in the contact layer in response to supplying negative pressure to the sealed space.

10. The method of claim 1 , wherein the method further comprises micro-floating the contact layer within the sealed space in response to supplying fluid to the sealed space from a fluid source.

11. The method of claim 1 , wherein selecting the contact layer comprises:
determining a status of debris in the tissue site;
determining other parameters influencing treatment of the tissue site;
in response to determining a status of debris and other parameters influencing treatment, determining desired targets of treatment; and
selecting the contact layer in response to the desired targets of treatment.

12. The method of claim 11 , wherein selecting the contact layer in response to the desired targets of treatment comprises:
selecting a thickness of the contact layer;
selecting a firmness factor of the contact layer;
selecting a shape of the through-holes; and
selecting an effective diameter of the through-holes.

13. A method for disrupting material at a tissue site, the method comprising:
selecting a contact layer for use on the tissue site, wherein the contact layer comprises walls defining a plurality of through-holes;
positioning the contact layer adjacent to the tissue site;
positioning a retainer layer over the contact layer;
positioning a sealing member over the contact layer and the retainer layer;
sealing the sealing member to tissue surrounding the tissue site to form a sealed space enclosing the contact layer and the retainer layer;
fluidly coupling a negative-pressure source to the sealed space;
supplying negative pressure to the sealed space, the contact layer, and the retainer layer;
drawing tissue into the through-holes to form nodules;
drawing portion of the retainer layer into the plurality of through-holes of the contact layer to form bosses; and
contacting a top of the nodules using the bosses to limit a height of the nodules.

14. The method of claim 13 , wherein the method further comprises rupturing debris on the nodules.

15. The method of claim 13 , wherein the method further comprises removing debris from a surface of the tissue site.

16. The method of claim 13 , wherein the method further comprises applying force to material at the tissue site through the through-holes.

17. A method for disrupting material at a tissue site, the method comprising:
selecting a contact layer for use on the tissue site, wherein the contact layer comprises walls defining a plurality of through-holes;
positioning the contact layer adjacent to the tissue site;
positioning a sealing member over the contact layer;
sealing the sealing member to tissue surrounding the tissue site to form a sealed space enclosing the contact layer;
fluidly coupling a negative-pressure source to the sealed space;
supplying negative pressure to the sealed space and the contact layer to draw tissue into the through-holes to form nodules; and
micro-floating the contact layer within the sealed space in response to supplying fluid to the sealed space from a fluid source.

18. The method of claim 17 , wherein the method further comprises generating macro-pressure points in the tissue adjacent to the plurality of through-holes in the contact layer in response to supplying negative pressure to the sealed space.

19. The method of claim 17 , wherein the method further comprises channeling negative pressure through the plurality of through-holes of the contact layer in response to supplying negative pressure to the sealed space to generate concentrated stresses in tissue adjacent to the plurality of through-holes.

Assignees

• Kci Licensing Inc

Inventors

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

Classifications

• A61B2017/22008

  used or promoted · CPC title

• A61B2017/22089

  Gas-bubbles · CPC title

• A61B17/32 Primary

  Surgical cutting instruments ({A61B18/042 takes precedence; suture cutters A61B17/0467;} implements for ligaturing and cutting {A61B17/122, A61B17/12; instruments for rupturing the amniotic membrane A61B17/4208; specially adapted knives for eye surgery A61F9/0133}) · CPC title

• A61B2017/320064

  with tissue or sample retaining means · CPC title

• A61B2017/320008

  Scrapers · CPC title