Subatmospheric pressure mechanism for wound therapy system and related methods therefor

• US 9,931,446 B2
• Filed: 10/02/2013
• Issued: 04/03/2018
• 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
• Application Number:
  US14/044,604
• Publication Number:
  US 20140163491A1
• Time in Patent Office: 1,644 Days
• 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 negative pressure wound therapy system comprising:

a conduit configured to be in fluid communication with a wound dressing; and

a canister configured to store fluid aspirated from a wound, the canister comprising;

a base having a longitudinal axis and having a fluid receiving cavity in fluid communication with the conduit; and

a divider integral to the base and positioned to enclose a portion of the base, the divider comprising a plurality of grooves formed on an underside thereof, at least one groove of the plurality of grooves configured to be in fluid communication with the fluid receiving cavity, wherein at least some of the plurality of grooves extend substantially longitudinally; and

wherein the divider comprises two ports, each port configured to be in fluid communication with at least one groove of the plurality of grooves that extends substantially longitudinally, and wherein a hydrophobic membrane is in fluid communication with at least one of the two ports.

2. The system according to claim 1, wherein one of the two ports comprises a vacuum port configured to be in fluid communication with the plurality of grooves.

3. The system according to claim 2, wherein the divider further comprises a channel configured to be in fluid communication with the plurality of grooves and with the vacuum port.

4. The system according to claim 1, wherein the divider is configured to be received within the base.

5. The system according to claim 1, wherein the hydrophobic membrane at least partially covers the plurality of grooves.

6. The system according to claim 1, further comprising a negative pressure source in fluid communication with the canister, the negative pressure source configured to aspirate fluid from the wound.

12. The system according to claim 1, wherein both ports are in fluid communication with the hydrophobic membrane.

19. The system according to claim 1, further comprising a cover segment configured to couple to the canister comprising a negative pressure source and a power source coupled to the negative pressure source.

20. The system according to claim 19, wherein the cover segment comprises a lip and an extension extending from the cover segment on an end of the cover segment opposite the lip.

21. The system according to claim 20, wherein the lip is configured to engage a flange of the canister.

22. The system according to claim 20, wherein the extension is configured to releasably engage an end of the base.

23. The system according to claim 22, wherein the extension comprises a tab configured to engage a notch on the base.

24. The system according to claim 20, wherein the extension extends out further from the cover segment than the lip.

7. A method of treating a wound with negative pressure wound therapy, the method comprising:

aspirating fluid from a wound covered by a wound dressing placed over the wound, the fluid being aspirated through a conduit that is in fluid communication with the wound dressing; and

storing fluid aspirated from the wound in a canister, the canister comprising;

a base having a longitudinal axis and having a fluid receiving cavity in fluid communication with the conduit; and

a divider integral to the base and positioned to enclose a portion of the base, the divider comprising a plurality of grooves formed on an underside thereof, at least one groove of the plurality of grooves being in fluid communication with the fluid receiving cavity, wherein at least some of the plurality of grooves extend substantially longitudinally; and

wherein the divider comprises two ports, each port configured to be in fluid communication with at least one groove of the plurality of grooves that extends substantially longitudinally, and wherein a hydrophobic membrane is in fluid communication with at least one of the two ports.

8. The method according to claim 7, wherein one of the two ports comprises a vacuum port that is in fluid communication with the plurality of grooves.

9. The method according to claim 8, wherein the divider further comprises a channel configured to be in fluid communication with the plurality of grooves and with the vacuum port.

10. The method according to claim 7, wherein the divider is configured to be received within the base.

11. The method according to claim 7, wherein the hydrophobic membrane at least partially covers the plurality of grooves.

25. The method according to claim 7, wherein fluid is aspirated from the wound using a negative pressure source contained within a cover segment pivotally coupled to the base of the canister.

13. A negative pressure wound therapy system comprising:

a conduit configured to be in fluid communication with a wound dressing; and

a canister configured to store fluid aspirated from a wound, the canister comprising;

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

a divider integral to the base and positioned to enclose a portion of the base, the divider comprising a plurality of grooves formed on an underside thereof, the divider comprising a longitudinal length,

wherein the plurality of grooves are configured to be in fluid communication with the fluid receiving cavity; and

wherein at least some of the plurality of grooves are configured to span substantially the entire longitudinal length of the divider.

14. The system according to claim 13, wherein the canister further comprises a vacuum port configured to be in fluid communication with the plurality of grooves.

15. The system according to claim 14, wherein the canister further comprises a hydrophobic membrane covering the vacuum port.

16. The system according to claim 13, wherein the canister further comprises a hydrophobic membrane at least partially covering the plurality of grooves.

17. The method according to claim 13, wherein at least some of the plurality of grooves are substantially longitudinal.

18. The method according to claim 13, wherein the divider comprising a channel configured to provide fluid communication between the plurality of grooves and at least one port.