Mechanical wound therapy for sub-atmospheric wound care system

• US 9,393,354 B2
• Filed: 10/15/2012
• Issued: 07/19/2016
• Est. Priority Date: 11/01/2011
• Status: Active Grant

• Current Assignee: J & M Shuler Medical, Inc.
• Original Assignee: J & M Shuler Medical, Inc.
• Inventors: Freedman, Brett A., Shuler, Michael Simms
• Primary Examiner(s): Zalukaeva, Tatyana
• Assistant Examiner(s): Mensh, Andrew J
• Application Number:
  US13/652,445
• Publication Number:
  US 20130165821A1
• Time in Patent Office: 1,373 Days
• Field of Search: 604/305
• US Class Current: 1/1
• CPC Class Codes: A61B 46/00 Surgical drapes
• CPC Class Codes: A61F 13/00 Bandages or dressings radioactive dressings A61N5/1029; Absorbent pads
• CPC Class Codes: A61F 13/00063 comprising medicaments or additives, e.g. odor control, PH control, debriding, antimicrobic drug delivery dressings A61K9/70; chemical aspect of the additives A61L15/00
• CPC Class Codes: A61F 13/00085 having means for facilitating the application on the skin, e.g. single hand handling facilities A61F13/0259 takes precedence; bandage applicators separate from the bandage or the packaging A61F15/005
• CPC Class Codes: A61F 13/01021 characterised by the structure of the dressing
• CPC Class Codes: A61F 13/023 wound covering film layers without a fluid retention layer
• CPC Class Codes: A61F 13/0279 by attaching individual patches on moving webs
• CPC Class Codes: A61F 13/05 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 Class Codes: A61F 2013/00357 implanted wound fillings or covers membranes for covering bone defects A61F2/2846
• CPC Class Codes: A61F 2013/00536 for draining or irrigating wounds
• CPC Class Codes: A61M 1/77 Suction-irrigation systems aspiration tips supplying fluids A61M1/85; specific for negative pressure wound therapy A61M1/92; combined with tracheal tubes A61M16/0463
• CPC Class Codes: A61M 1/85 with gas or fluid supply means, e.g. for supplying rinsing fluids or anticoagulants for negative pressure wound therapy A61M1/92, A61M1/94; combined with tracheal tubes A61M16/0463; dental instruments with combined rinsing and aspirating A61C17/0208
• CPC Class Codes: A61M 1/915 Constructional details of the pressure distribution manifold
• CPC Class Codes: A61M 1/916 specially adapted for deep wounds
• CPC Class Codes: A61M 1/918 for multiple suction locations
• CPC Class Codes: A61M 1/92 with liquid supply means
• CPC Class Codes: A61M 1/966 having a pressure sensor on or near the dressing
• CPC Class Codes: A61M 2205/15 Detection of leaks
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/3344 Measuring or controlling pressure at the body treatment site
• CPC Class Codes: A61M 2205/3553 : remote, e.g. between patient's home and doctor's office
• CPC Class Codes: A61M 2205/3584 : using modem, internet or bluetooth
• CPC Class Codes: A61M 2205/3592 : using telemetric means, e.g. radio or optical transmission
• CPC Class Codes: A61M 3/0279 : Cannula; Nozzles; Tips; their connection means
• CPC Class Codes: A61M 3/0283 : with at least two inner passageways, a first one for irrigating and a second for evacuating suction-irrigation systems A61M1/77; aspiration tips with fluid supply means A61M1/85; for negative pressure wound therapy A61M1/92
• CPC Class Codes: A61M 37/00 : Other apparatus for introducing media into the body for reproduction or fertilisation A61B17/425; apparatus for iontophoresis or cataphoresis A61N1/30; Percutany, i.e. introducing medicines into the body by diffusion through the skin salt baths A61H33/04
• CPC Class Codes: A61N 5/0624 : for eliminating microbes, germs, bacteria on or in the body
• CPC Class Codes: A61N 7/00 : Ultrasound therapy lithotripsy A61B17/22, A61B17/225; massage using supersonic vibration A61H23/00 ; using ultrasound for introducing media into the body A61M37/0092
• CPC Class Codes: Y10T 29/49826 : Assembling or joining

Abstract

A mechanical wound therapy (MWT) system includes a connection for a vacuum source, which is routed through an airtight covering to a porous material positioned over the wound. The porous material may be a tubing network interspaced by a netting material constructed of biologically inert or bioabsorbable material. Alternatively, the porous material may be a layered unified dressing in which layers of mesh, netting or thin perforated film are separated and fixedly attached to functional elements of the dressing (e.g., irrigation tubing) or spacers. The vacuum and irrigation systems may be completely separated. An airtight sealing layer or foldable adhesive sealing layer may seal the dressing and facilitate sealing the dressing to the wound margins. Additional modular devices such as a wound approximating system, positive pressure bladders and adjuvant therapy modules as well as enhanced monitoring technology can be added to synergistically increase the capabilities of each dressing.

Claims

1. A negative pressure wound dressing assembly with an inner ventral surface and an outer dorsal surface, the wound dressing assembly comprising:

a first netting layer with a ventral side serving as the ventral surface of the wound dressing assembly configured for placement over a wound;

a covering layer with a dorsal side positioned away from the wound;

a second netting layer positioned between the first netting layer and the covering layer;

a tubing layer positioned between the first netting layer and the second netting layer, the tubing layer comprising a plurality of radially extending tubes positioned between an upper surface of the first netting layer and a lower surface of the second netting layer, the plurality of radially extending tubes of the tubing layer extending outwardly from a central connection junction toward a periphery of the first and second netting layers and being in fluidic communication with the central connection junction that is connectable to one of a source of irrigant and a vacuum source; and

a vacuum interface chamber for connecting with the vacuum source, the vacuum interface chamber defining an internal space in communication with a plurality of openings along a ventral face or a side surfaces of the vacuum interface chamber for distributing negative pressure from the vacuum source, wherein the vacuum interface chamber is positioned below a central region of the covering layer and above the first netting layer, the second netting layer, and the tubing layer.

2. A negative pressure wound dressing assembly with an inner ventral surface and an outer dorsal surface, the wound dressing assembly comprising:

a covering layer with a dorsal side positioned away from the wound;

a vacuum interface chamber defining an internal space in communication with a plurality of openings along a ventral face or a side surface of the vacuum interface chamber for distributing negative pressure from the vacuum source, wherein the vacuum interface chamber is positioned below a central region of the covering layer;

an irrigation tubing layer positioned between below the covering layer and below the vacuum interface chamber, the irrigation tubing layer comprising a plurality of radially extending irrigation tubes that extend outwardly from a central connection junction toward a periphery of the dressing assembly and being in fluidic communication with the central connection junction that is connectable to and irrigation source; and

a porous dressing component disposed as a ventral surface of the negative pressure wound dressing assembly and positioned below the plurality of radially extending irrigation tubes of the irrigation tubing layer, the vacuum interface chamber, and the covering layer, the porous dressing component being configured to cover an open wound.

3. The negative pressure wound dressing assembly of claim 2, wherein the porous dressing component is netting of a biologically inert polymer material.

4. The negative pressure wound dressing assembly of claim 2, wherein the porous dressing component is a perforated film of a biologically inert polymer material.

5. The negative pressure wound dressing assembly of claim 2, wherein the porous dressing component is netting impregnated with one or more antimicrobial agents.

6. The negative pressure wound dressing assembly of claim 5, wherein the one or more antimicrobial agents comprise silver-ions.

7. The negative pressure wound dressing assembly of claim 2, wherein the porous dressing component is netting of a bioabsorbable material.

8. The negative pressure wound dressing assembly of claim 2, wherein the porous dressing component is impregnated with a antimicrobially active agent.

9. The negative pressure wound dressing assembly of claim 2, wherein the porous dressing component is impregnated with one or more biologically active agents.

10. The negative pressure wound dressing assembly of claim 2, further comprising:

a tissue substrate affixed to the porous dressing component.

11. The negative pressure wound dressing assembly of claim 2, further comprising:

radio opaque markers integrated with one or more components of the negative pressure wound dressing assembly, the radio opaque markers being configured to identify portions of said one or more components retained in the wound following removal of the negative pressure wound dressing assembly.

12. The negative pressure wound dressing assembly of claim 2, wherein the porous dressing component is netting covered with a pliable coating material in a manner configured to reduce fraying of the netting.

13. The negative pressure wound dressing assembly of claim 2, wherein the porous dressing component has an abrasive ventral surface configured for debridement of the wound.

14. The negative pressure wound dressing assembly of claim 2, wherein the porous dressing component has a non-stick ventral surface configured to reduce tissue injury upon removal of the porous dressing component from the wound.

15. The negative pressure wound dressing assembly of claim 2, further comprising:

one or more ultra-sonic transducers embedded in the porous dressing component and positioned to sit in fluidic communication with a surface of the open wound.

16. The negative pressure wound dressing assembly of claim 2, further comprising a second porous dressing component positioned above the plurality of radially extending irrigation tubes of the irrigation tubing layer and below the vacuum interface chamber and the covering layer.

17. The negative pressure wound dressing assembly of claim 16, wherein both the first and second porous dressing components comprise a netting layer of a biologically inert polymer material.

18. The negative pressure wound dressing assembly of claim 17, wherein the plurality of radially extending irrigation tubes of the irrigation tubing layer extend radially outward in a curved path between an upper surface of the first porous dressing component and a lower surface of the second porous dressing component.

19. The negative pressure wound dressing assembly of claim 16, wherein both the first and second porous dressing components comprise a perforated film layer of a biologically inert polymer material.

20. The negative pressure wound dressing assembly of claim 19, wherein the plurality of radially extending irrigation tubes of the irrigation tubing layer extend radially outward in a curved path between an upper surface of the first porous dressing component and a lower surface of the second porous dressing component.