Portable wound treatment apparatus having pressure feedback capabilities

• US 7,670,323 B2
• Filed: 03/02/2007
• Issued: 03/02/2010
• Est. Priority Date: 11/14/1995
• Status: Expired due to Fees

• Current Assignee: KCI Licensing Incorporated (3M Company)
• Original Assignee: KCI Licensing Incorporated (3M Company)
• Inventors: Heaton, Keith Patrick, Hunt, Kenneth William
• Primary Examiner(s): Zalukaeva; Tatyana
• Assistant Examiner(s): Treyger; Ilya Y
• Application Number:
  US11/713,485
• Publication Number:
  US 20070167927A1
• Time in Patent Office: 1,096 Days
• Field of Search: 604/319, 604/316, 604/305, 604/541, 604/315, 604/543
• US Class Current: 604/313
• CPC Class Codes: A61M 1/732 Visual indicating means for vacuum pressure
• CPC Class Codes: A61M 1/75 Intermittent or pulsating suction A61M1/63, A61M1/772 take precedence
• CPC Class Codes: A61M 1/78 Means for preventing overflow or contamination of the pumping systems combined with drainage containers A61M1/60
• CPC Class Codes: A61M 1/784 by filtering, sterilising or disinfecting the exhaust air, e.g. swellable filter valves
• CPC Class Codes: A61M 1/79 Filters for solid matter specially adapted for dental use A61C17/065
• CPC Class Codes: A61M 1/80 Suction pumps A61M1/64, A61M1/71, A61M60/00 take precedence
• CPC Class Codes: A61M 1/82 Membrane pumps, e.g. bulbs
• CPC Class Codes: A61M 1/915 Constructional details of the pressure distribution manifold
• CPC Class Codes: A61M 1/96 Suction control thereof
• CPC Class Codes: A61M 1/982 with means for detecting level of collected exudate
• CPC Class Codes: A61M 1/984 portable on the body
• 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 2205/3351 Controlling upstream pump pressure
• CPC Class Codes: A61M 2205/3379 Masses, volumes, levels of fluids in reservoirs, flow rates
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 2205/8206 battery-operated
• CPC Class Codes: A61M 2209/088 on the body
• CPC Class Codes: A61M 27/00 : Drainage appliance for wounds or the like , i.e. wound drains, implanted drains negative pressure wound therapy devices A61M1/90; implements for holding wound open A61B17/02 ; middle ear drainage A61F11/202
• CPC Class Codes: Y10S 604/902 : Suction wands

Abstract

A reduced pressure treatment apparatus includes a drape for positioning over the wound site to create and maintain a substantially air-tight cavity between the wound site and the drape. A multi-lumen suction tube is provided to be attached to a reduced pressure source. The multi-lumen suction tube includes a center lumen and at least one outer lumen and is configured to deliver reduced pressure beneath the drape to the substantially air-tight cavity. The multi-lumen suction tube is adapted to allow fluid to be drawn from the wound site through the center lumen and pressure to be monitored at the wound site through the at least one outer lumen.

Claims

1. A reduced pressure treatment apparatus for administering reduced pressure to a wound site, the apparatus comprising:

a drape for positioning over the wound site to create and maintain a substantially air-tight cavity between the wound site and the drape;

a multi-lumen suction tube configured to be attached to a reduced pressure source, the multi-lumen suction tube having a center lumen and at least one outer lumen and being configured to deliver reduced pressure beneath the drape to the substantially air-tight cavity, the at least one outer lumen in fluid communication with the substantially air-tight cavity such that the reduced pressure is monitorable at the wound site through the at least one outer lumen; and

wherein the multi-lumen suction tube is adapted to allow fluid to be drawn from the wound site through the center lumen, wherein the center lumen of the multi-lumen tube comprises a central bore adapted to remove fluids from the wound site and the at least one outer lumen comprises conduits located within the walls of the multi-lumen suction tube and adapted to allow air to flow there through, and wherein the conduits are circumferentially spaced at 90 degree intervals around the central bore.

2. The apparatus of claim 1 further comprising a pressure sensor operably connected to the at least one outer lumen of the multi-lumen suction tube.

3. The apparatus of claim 1 further comprising a pressure relief valve fluidly connected to the at least one outer lumen to enable administration of intermittent reduced pressure to the wound site.

4. The apparatus of claim 1 further comprising a connector operably associated with the drape and connectable to the multi-lumen suction tube to facilitate introduction of the reduced pressure to the substantially air-tight cavity, the connector having a spout for connection to an end of the multi-lumen suction tube.

5. The apparatus of claim 4, wherein the drape includes an aperture for the projection there through of the spout.

6. The apparatus of claim 1, wherein the drape is a plastic film.

7. The apparatus of claim 1, wherein the drape is coated with a pressure-sensitive adhesive for securing the drape over the wound site.

8. The apparatus of claim 1, wherein the at least one outer lumen is defined by annular spaces of the multi-lumen suction tube adapted to allow air to flow there through.

9. A reduced pressure treatment apparatus comprising:

a manifold for distributing reduced pressure to a wound site;

a drape for positioning over the manifold;

a multi-lumen suction tube fluidly connected to the manifold, the multi-lumen suction tube having a center lumen to allow fluid to be drawn from the wound site and at least one outer lumen in fluid communication with the wound site such that the reduced pressure is monitorable at the wound site through the at least one outer lumen; and

wherein the center lumen of the multi-lumen suction tube comprises a central bore adapted to remove fluids from the wound site and the at least one outer lumen comprises conduits located within the walls of the multi-lumen suction tube and adapted to allow air to flow there through, and wherein the conduits are circumferentially spaced at 90 degree intervals around the central bore.

10. The apparatus of claim 9 further comprising a pressure sensor operably connected to the at least one outer lumen of the multi-lumen suction tube.

11. The apparatus of claim 9 further comprising a pressure relief valve fluidly connected to the at least one outer lumen to enable administration of intermittent reduced pressure to the wound site.

12. The apparatus of claim 9, wherein the manifold is a polyvinyl alcohol foam.

13. The apparatus of claim 9, wherein the manifold is a polyurethane foam.

14. The apparatus of claim 9, wherein the multi-lumen suction tube is fluidly connected to the manifold by a connector to facilitate introduction of the reduced pressure to the manifold, the connector including a disc-like member having a lower face in contact with the manifold and a spout opposite said lower face for connection to an end of the multi-lumen suction tube.

15. The apparatus of claim 14, wherein the drape includes an aperture for the projection there through of the spout.

16. The apparatus of claim 9, wherein the drape is a plastic film.

17. The apparatus of claim 9, wherein the drape is coated with a pressure-sensitive adhesive for securing the drape over the manifold.

18. The apparatus of claim 9, wherein the at least one outer lumen is defined by annular spaces of the multi-lumen tube adapted to allow air to flow there through.

19. A reduced pressure treatment apparatus for administering reduced pressure to a wound site, the apparatus comprising:

a manifold for distributing reduced pressure to the wound site;

a multi-lumen suction tube fluidly connected to the manifold to deliver reduced pressure to the manifold, the multi-lumen suction tube having a center lumen and at least one outer lumen, the at least one outer lumen in fluid communication with the manifold such that the reduced pressure is monitorable at the wound site through the at least one outer lumen; and

wherein the multi-lumen suction tube is adapted to allow fluid to be drawn from the wound site through the center lumen; and

wherein the center lumen of the multi-lumen suction tube comprises a central bore adapted to remove fluids from the wound site, and the at least one outer lumen includes conduits located within the walls of the multi-lumen suction tube adapted to allow air to flow there through, and wherein the conduits are circumferentially spaced at 90 degree intervals around the central bore.

20. The apparatus of claim 19 further comprising a pressure sensor operably connected to the at least one outer lumen of the multi-lumen suction tube.

21. The apparatus of claim 19 further comprising a pressure relief valve fluidly connected to the at least one outer lumen to enable administration of intermittent reduced pressure to the wound site.

22. The apparatus of claim 19, wherein the wound site is a surface wound.

23. The apparatus of claim 19, wherein the manifold is a polyvinyl alcohol foam.

24. The apparatus of claim 19, wherein the manifold is a polyurethane foam.

25. The apparatus of claim 19, wherein the multi-lumen suction tube is fluidly connected to the manifold by a connector to facilitate introduction of the reduced pressure to the manifold, the connector including a disc-like member having a lower face in contact with the manifold and a spout opposite said lower face for connection to an end of the multi-lumen suction tube.

26. The apparatus of claim 25, wherein the drape includes an aperture for the projection there through of the spout.

27. The apparatus of claim 19, wherein the drape is a plastic film.

28. The apparatus of claim 19, wherein the drape is coated with a pressure-sensitive adhesive for securing the drape over the manifold.

29. The apparatus of claim 19, wherein the center lumen of the multi-lumen tube comprises a central bore adapted to remove fluids from the wound site and the at least one outer lumen is defined by annular spaces of the multilumen tube adapted to allow air to flow there through.