Wound debridement by irrigation with ultrasonically activated microbubbles

Patent metadata

Field	Value
Publication number	US-2016325028-A1
Application number	US-201615147666-A
Country	US
Kind code	A1
Filing date	May 5, 2016
Priority date	May 8, 2015
Publication date	Nov 10, 2016
Grant date	—

Abstract

A treatment system for debriding a treatment area of a tissue site and applying negative pressure is disclosed. In some embodiments, the treatment system may include an ultrasonic bubble generator fluidly coupled to a negative-pressure source, fluid source, and a dressing. Fluid may be drawn from the fluid source to the ultrasonic bubble generator, whereby micro-bubbles and ultrasonic waves may be generated in the fluid before the fluid is instilled to the dressing.

First claim

1 . A system for treating a tissue site, comprising:
a dressing for placing on the tissue site; a negative-pressure source fluidly coupled to the dressing; a fluid source; and
an ultrasonic bubble generator fluidly coupled to the fluid source and to the dressing, the ultrasonic bubble generator configured to generate micro-bubbles and ultrasonic waves in a fluid from the fluid source.

2 . The system of claim 1 , further comprising an ultra-violet light source configured to generate and treat the fluid with ultra-violet light.

3 . The system of claim 1 , further comprising a container fluidly coupled to the negative-pressure source and the dressing and configured to collect fluids.

4 . The system of claim 1 , further comprising a connection interface configured to fluidly connect the negative-pressure source to the dressing.

5 . The system of claim 1 , further comprising a connection interface configured to deliver the fluid to the dressing.

6 . The system of claim 1 , wherein the dressing comprises:
a manifold adapted to be placed proximate to the tissue site; and a drape adapted to be placed over the manifold.

7 . The system of claim 6 , wherein the manifold comprises a perforated felted foam.

8 . The system of claim 7 , wherein the perforated felted foam comprises perforations in a range of 3-7 millimeters (mm) in diameter.

9 . The system of claim 8 , wherein the perforations are approximately 5 millimeters (mm) in diameter.

10 . The system of claim 6 , wherein the manifold comprises a hydrophilic polymer.

11 . The system of claim 10 , wherein the hydrophilic polymer is a hydrophilic polyurethane polymer.

12 . The system of claim 6 , wherein the manifold comprises a hydrophilic polymer formed into a porous structure and having perforations in a range of 5-10 millimeters (mm) in diameter.

13 . The system of claim 6 , wherein the manifold comprises a hydrophilic polymer formed into a perforated sheet having protrusions on a first side.

14 . The system of claim 13 , wherein the protrusions are spaced apart by a range of 5-10 millimeters (mm).

15 . The system of claim 13 , wherein the protrusions are hemispherical or polygonal in shape.

16 . The system of claim 1 , wherein the fluid source comprises a pump.

17 . The system of claim 1 , wherein the fluid source comprises a reservoir.

18 . A method for debriding necrotic tissue from a tissue site, comprising:
coupling a fluid source to the tissue site; supplying a fluid from the fluid source to an ultrasonic bubble generator; generating micro-bubbles and ultrasonic waves in the fluid with the ultrasonic bubble generator; and delivering the micro-bubbles and ultrasonic waves to the necrotic tissue.

19 . The method of claim 18 , wherein the ultrasonic bubble generator further comprises an ultra-violet light source configured to generate and treat the fluid with ultra-violet light.

20 . The method of claim 18 , wherein delivering the micro-bubbles and ultrasonic waves to the necrotic tissue comprises delivering the micro-bubbles and ultrasonic waves to a dressing.

21 . The method of claim 20 , further comprising coupling a negative-pressure source to the dressing.

22 . An apparatus for debriding a tissue site, comprising:
a dressing for placing on the tissue site; and an ultrasonic bubble generator fluidly coupled to the dressing and configured to generate micro-bubbles and ultrasonic waves in a fluid delivered to the dressing.

23 . The apparatus of claim 22 , wherein the ultrasonic bubble generator further comprises an ultra-violet light source configured to generate and treat the fluid with ultra-violet light.

24 . The apparatus of claim 22 , wherein the dressing comprises:
a manifold adapted to be placed proximate to the tissue site; and a drape adapted to be placed over the manifold.

25 . The apparatus of claim 24 , wherein the manifold comprises a perforated felted foam.

26 . The apparatus of claim 25 , wherein the perforated felted foam comprises perforations in a range of 3-7 millimeters (mm) in diameter.

27 . The apparatus of claim 22 , further comprising a negative-pressure source.

28 . (canceled)

Assignees

• Kci Licensing Inc

Inventors

• Locke Christopher Brian
• Robinson Timothy Mark

Classifications

• A61B2017/22089

  Gas-bubbles · CPC title

• A61B2017/320008

  Scrapers · CPC title

• A61M3/0275

  Pulsating jets; Vibrating nozzles · CPC title

• A61L2/10

  Ultraviolet [UV] radiation · CPC title

• A61L2202/11

  Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps · CPC title