Granted Patent B2

US 9,456,930 · App. 14/217,219 · Granted Oct 4, 2016

Inventor: David S. Zamierowski (Overland Park, KS)

Assignee: KCI Licensing, Inc.

A61F13/0216A61F13/00068A61M1/0088

Abstract

Claims (75)

1. A negative pressure wound therapy (NPWT) dressing configured for application to a skin surface over an incision and configured for connection to a negative pressure source, which dressing comprises:

a fluid-permeable wick element configured for placement over the incision;

a fluid transfer component configured for placement on the wick element and including an exterior surface;

said transfer component configured for connection to the negative pressure source and for transferring fluid from the incision through the wick element and to the exterior surface;

said transfer component configured for transmitting negative pressure from the negative pressure source to the incision;

a drape placed over the transfer component and adapted for releasable connection to a skin surface around the incision;

a slip drain comprising a fluid-impermeable material and having a proximal end adapted for placement in the incision and a distal end communicating with the negative pressure source; and

gaps in said wick element and said transfer component configured for allowing said slip drain through to the surface.

2. The NPWT dressing according to claim 1 , which includes:

said slip drain comprising a pair of material strips each having proximal ends placed in the incision and distal ends adapted for communicating with the negative pressure source; and

said slip drain configured for extending through the wick element and the fluid transfer component.

3. The NPWT dressing according to claim 1 , which includes:

a permeable material mat placed between the wick element and the transfer component and adapted for transferring fluid therebetween; and

aligned slits in said wick element and said mat and slidably receiving said material strips.

4. The NPWT dressing according to claim 2 , which includes:

said material strip proximal ends being configured for placement in spaced relation within the incision; and

said material strips generally being respectively adjacent to each other distally from said proximal ends.

5. The NPWT dressing according to claim 1 , which includes:

said transfer component comprising first and second sections positioned adjacent to each other; and

said slip drain extending between said transfer component sections.

6. The NPWT dressing according to claim 5 , which includes:

each said transfer component section having an elongated configuration with a first end and a second end;

said transfer component section first ends being positioned in abutting relation to each other with said transfer component sections being configured for fluidic transfer therebetween; and

said slip drain extending between said transfer component section first ends.

7. The NPWT dressing according to claim 6 , which includes:

said drape comprising first and second sections positioned over said first and second transfer component sections respectively.

8. The NPWT dressing according to claim 7 , which includes:

a drape bridging strip placed over said transfer component section first ends and said drape sections for closing said drape and covering relation over said transfer component.

9. The NPWT dressing according to claim 7 , which includes:

an inlet fluid connection mounted on said drape and configured for introducing fluid to said transfer component; and

an outlet fluid connection mounted on said drape and configured for extracting fluid from said transfer component.

10. The NPWT dressing according to claim 1 , which includes:

a component connected to the transfer component and configured for providing a cell manipulating factor source;

an inflow line fluidically connecting the factor source to the transfer component; and

an outflow line from the transfer component.

11. A negative pressure wound therapy (NPWT) dressing configured for application to a skin surface over an incision and configured for connection to a negative pressure source, which dressing comprises:

a fluid-permeable wick element adapted for placement over the incision;

a fluid transfer component configured for placement on the wick element and including an exterior surface;

said transfer component configured for connection to the negative pressure source and for transferring fluid from the incision through the wick element and to the exterior surface;

said transfer component configured for transmitting negative pressure from the negative pressure source to the incision;

a drape placed over the transfer component and adapted for releasable connection to a skin surface around the incision;

a slip drain comprising a fluid-impermeable material and having a proximal end adapted for placement in the incision and a distal end communicating with the negative pressure source; and

said slip drain extending externally of said drape to said distal end.

12. The NPWT according to claim 11 , which includes additional steps of:

a fluid-permeable mat between the wick and the transfer component; and

said dressing transferring fluid under negative pressure from the mat to the transfer component.

13. The NPWT dressing according to claim 12 , which includes:

said transfer component including a compressible, open-cell foam core.

14. The NPWT dressing according to claim 13 , which includes:

a permeable membrane flexible cover enclosing said transfer component core.

15. The NPWT dressing according to claim 11 , which includes:

said wound comprising an incision;

drain tubing placed within said incision; and

said drain tubing configured for extracting fluid from said incision.

16. The NPWT dressing according to claim 11 , which includes:

said dressing being configured for setting edges of said wound in apposition to each other; and

said dressing being configured for drawing said wound edges together in abutting relation using NPWT applied via said transfer component.

17. The NPWT system according to claim 11 , which includes:

said transfer component including first and second sections;

said dressing configured for placing said transfer component sections adjacent to each other; and

said slip drain configured for extending between said transfer component sections.

18. The NPWT dressing according to claim 12 , which includes:

a wick slit in said wick;

a mat slit in said mat; and

said slip drain configured for extending through said wick and mat slits.

19. The NPWT dressing according to claim 18 , which includes:

said slip drain including a pair of material strips each having distal and proximal ends;

said material strip distal ends configured for placing in said wound in spaced relation from each other; and

said material strips configured for extending through said wick slit, said mat slit and transfer component.

20. A negative pressure wound therapy (NPWT) draining system configured for preventing liquid-filled space-occupying lesions in sub-dermal layers surrounding an incision, the system comprising:

a fluid-impermeable slip drain configured for draining fluid from sub-dermal layers surrounding an incision;

said fluid-impermeable slip drain having a proximal end configured for placement in a sub-dermal plane at risk for liquid-filled space-occupying lesions and a distal end configured for placement through said incision;

a NPWT surface dressing including a fluid-permeable wick element configured for placement over said incision, fluid transfer component configured for placement on said wick element, a gap configured for allowing said slip drain through said wick and said fluid transfer component, and a drape configured for releasable connection to a skin surface around said incision;

a negative pressure source configured for applying negative pressure to said NPWT surface dressing and said slip drain; and

a drape bridging strip configured for placement over said gap in said NPWT dressing to seal said incision.

Assignments (8)

Continuity (2)