Subatmospheric pressure mechanism for wound therapy system and related methods therefor

• US 8,551,060 B2
• Filed: 07/20/2011
• Issued: 10/08/2013
• Est. Priority Date: 07/17/2008
• Status: Active Grant

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Inventors: Schuessler, Wayne, Sisk, Ricky A.
• Primary Examiner(s): Zalukaeva, Tatyana
• Assistant Examiner(s): TREYGER, ILYA Y
• Application Number:
  US13/186,599
• Publication Number:
  US 20110276017A1
• Time in Patent Office: 811 Days
• Field of Search: 604/311, 604/312, 604/313, 604/315, 604/316
• US Class Current: 604/313
• CPC Class Codes: A61M 1/784 by filtering, sterilising or disinfecting the exhaust air, e.g. swellable filter valves
• CPC Class Codes: A61M 1/984 portable on the body
• CPC Class Codes: A61M 2205/3341 stabilising pressure or flow to avoid excessive variation

Abstract

A portable system for subatmospheric pressure therapy in connection with healing a surgical wound is provided. The system includes a wound dressing dimensioned for positioning relative to a wound bed of a subject, and a collection canister in fluid communication with the wound dressing. The canister includes a base defining a fluid receiving cavity and having a fluid inlet port and a vacuum port. The fluid inlet port is configured for fluid communication with a wound dressing, The system further includes a cover selectively engageable to the base, e.g., in a snap-fit manner. The cover is configured to receive a control unit and has a vent assembly for exhausting the control unit. A seal member is interposed relative to the base and the cover to establish and maintain a substantial sealed relationship between the two components when assembled.

Claims

1. A system for removing body fluid from body tissue, comprising:

a conduit adapted to be in fluid communication with body fluid;

a canister including,

a base segment having a fluid receiving cavity in fluid communication with the conduit;

a cover segment coupled to the base segment, the cover segment including a subatmospheric pressure source fluidly coupled to the fluid receiving cavity; and

a divider segment disposed between the base segment and the cover segment, the divider segment including at least one groove in fluid communication with the fluid receiving cavity.

2. The system as in claim 1, wherein the divider segment includes a vacuum port fluidly coupling the subatmospheric pressure source with the fluid receiving cavity through the at least one groove.

3. The system as in claim 2, wherein the divider segment further comprises a hydrophobic membrane disposed on the divider segment, the hydrophobic membrane at least partially covering the vacuum port and the at least one groove.

4. The system as in claim 3, wherein the divider segment includes a plurality of grooves facing the fluid receiving cavity, each of the plurality of grooves in fluid communication with the fluid receiving cavity and the subatmospheric pressure source.

5. The system as in claim 4, wherein each of the plurality of grooves extends along a longitudinal axis of the divider segment.

6. The system as in claim 4, wherein the divider segment further includes a channel in fluid communication with each of the plurality of grooves.

7. The system as in claim 6, further comprising a means for coupling the base segment to the cover segment.

8. The system as in claim 1, further comprising a wound dressing fluidly connected to the conduit.

9. A subatmospheric pressure system for wound therapy, comprising:

a cover segment including a subatmospheric pressure source;

a base coupled to the cover segment, the base including a fluid receiving cavity;

a divider disposed between the base and the cover, the divider including a vacuum port in fluid communication with the fluid receiving cavity and fluidly coupled to the subatmospheric pressure source, the divider further including a groove defined on a surface of the divider facing the fluid receiving cavity, the groove in fluid communication with the vacuum port; and

a filter mounted on the divider, between the subatmospheric pressure source and the fluid receiving cavity.

10. The system as in claim 9, wherein the filter comprises a hydrophobic membrane.

11. The system as in claim 10, wherein the divider further comprises a channel defined on the surface, and wherein the divider comprises a plurality of grooves each defined on the surface, each of the plurality of grooves in fluid communication with the vacuum port through the channel.

12. The system as in claim 9, further comprising a wound dressing dimensioned for positioning relative to a wound bed of a subject.

14. The method as in claim 12, further comprising providing a wound dressing fluidly connectable to the fluid receiving cavity.

15. The method as in claim 14, further comprising providing a cap fluidly isolating the fluid receiving cavity from the wound dressing.

16. The method as in claim 12, wherein the filter comprises a hydrophobic membrane.

17. The method as in claim 16, wherein the divider further comprises a channel defined on the surface, and wherein the divider comprises a plurality of grooves each defined on the surface, each of the plurality of grooves in fluid communication with the vacuum port through the channel.

18. The method as in claim 17, further comprising providing a plug configured to fluidly isolate the fluid cavity.

19. The method as in claim 17, wherein the divider further includes a seal disposed between the cover segment and the base.

20. The method as in claim 9, wherein the cover segment further comprises a power source coupled to the subatmospheric pressure source.

13. A method of facilitating subatmospheric pressure therapy, comprising:

providing a portable system having a cover segment, a base segment coupled to the cover segment, and a divider disposed between the base segment and the cover segment, the cover segment including a subatmospheric pressure source, the base segment including a fluid receiving cavity fluidly coupled to the subatmospheric pressure source, the divider including a vacuum port, a groove defined on a surface of the divider facing the fluid receiving cavity, and a filter mounted on the divider between the subatmospheric pressure source and the fluid receiving cavity, the vacuum port fluidly coupling the subatmospheric pressure source and the fluid receiving cavity, the groove in fluid communication with the vacuum port and the fluid receiving cavity.