Canister for wound therapy and related methods therefor

• US 9,205,235 B2
• Filed: 05/07/2012
• Issued: 12/08/2015
• Est. Priority Date: 09/05/2008
• Status: Active Grant

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Inventors: Wiesner, Joel D.
• Primary Examiner(s): Wiest, Philip R
• Assistant Examiner(s): Zimbouski, Ariana
• Application Number:
  US13/465,595
• Publication Number:
  US 20120265160A1
• Time in Patent Office: 1,310 Days
• US Class Current: 1/1
• CPC Class Codes: A61F 2013/00536 for draining or irrigating wounds
• CPC Class Codes: A61M 1/60 Containers for suction drainage, adapted to be used with an external suction source containers not adapted for subjection to vacuum A61M1/69
• CPC Class Codes: A61M 1/64 Containers with integrated suction means containers not adapted for subjection to vacuum A61M1/69
• 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 1/98 Containers specifically adapted for negative pressure wound therapy
• CPC Class Codes: A61M 2205/21 insensitive to tilting or inclination, e.g. spill-over prevention
• CPC Class Codes: A61M 2205/75 with filters
• CPC Class Codes: A61M 2205/7536 allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes
• 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: Y10T 29/494 Fluidic or fluid actuated device making

Abstract

A portable system for subatmospheric pressure therapy in connection with healing a surgical wound includes a wound dressing dimensioned for positioning relative to a wound bed and a collection canister in fluid communication with the wound dressing. The canister includes a first vacuum chamber for drawing a vacuum and a second fluid chamber for collecting fluids removed from the wound dressing under the vacuum. The canister further includes a hydrophobic membrane separating the first and second chambers. The hydrophobic membrane is dimensioned to span a major portion of the cross-sectional area of the canister. The hydrophobic membrane may be dimensioned to substantially span an internal dimension of the collection canister. The hydrophobic membrane may include one or more outwardly extending lobes. The hydrophobic membrane may be releasably mountable to the canister, and, may be supported within a divider separating the first vacuum chamber and the second fluid chamber.

Claims

1. A collection canister comprising:

a first chamber fluidly connectable to a vacuum source for drawing a vacuum;

a second chamber including a cavity for receiving fluid drawn under the vacuum;

a hydrophobic membrane separating the first chamber and the second chamber, the hydrophobic membrane dimensioned to span at least a portion of the cross-sectional area of the collection canister and including one or more lobes extending outwardly relative to a central longitudinal axis extending along a length of the collection canister, the one or more lobes positioned and dimensioned for permitting vacuum draw upon tilting, inverting, or placing the collection canister on a side thereof; and

a divider supporting the hydrophobic membrane between the first chamber and the second chamber, wherein the divider includes one of a screen, grill, or a mesh.

2. The collection canister according to claim 1, wherein the hydrophobic membrane is dimensioned to span an internal dimension of the collection canister.

3. The collection canister according to claim 1, wherein the hydrophobic membrane includes a plurality of lobes arranged in staggered relation with respect to the central longitudinal axis.

4. The collection canister according to claim 1, wherein the hydrophobic membrane includes a plurality of lobes arranged in symmetric relation with respect to the central longitudinal axis.

5. The collection canister according to claim 1, wherein the hydrophobic membrane is releasably mountable in the collection canister.

6. The collection canister according to claim 1, wherein the hydrophobic membrane includes a first lobe disposed outward of a first side of the central longitudinal axis and a second lobe disposed outward of a second side of the central longitudinal axis.

7. The collection canister according to claim 1, wherein the hydrophobic membrane includes at least two first lobes disposed outward of a first side of the central longitudinal axis and at least two second lobes disposed outward of a second side of the central longitudinal axis.

8. The collection canister according to claim 7, wherein the at least two first lobes are longitudinally spaced relative to each other along the central longitudinal axis.

9. The collection canister according to claim 7, wherein the at least two second lobes are longitudinally spaced relative to each other along the central longitudinal axis.

10. The collection canister according to claim 1, wherein the first chamber includes the vacuum source and a power source operably connected to the vacuum source.

11. A method comprising:

providing a collection canister including a first chamber containing a vacuum source and a second chamber defining a cavity for receiving fluids drawn by the vacuum source; and

mounting a hydrophobic membrane within a divider separating the first chamber and the second chamber, the hydrophobic membrane dimensioned to span an internal dimension of the collection canister and including one or more lobes extending outwardly relative to a central longitudinal axis extending along a length of the collection canister, the one or more lobes positioned and dimensioned for permitting vacuum draw upon tilting, inverting, or placing the collection canister on a side thereof.

12. The method according to claim 11, wherein mounting the hydrophobic membrane comprises releasably mounting the hydrophobic membrane in the collection canister.

13. The method according to claim 12, further comprising sealing the collection canister.

14. The method according to claim 13, wherein sealing the collection canister comprises positioning a cover adjacent an upper area of the first chamber of the collection canister.

15. The method according to claim 14, further comprising extending a conduit from the second chamber, through the first chamber, and the cover.

16. A collection canister comprising:

a first chamber fluidly connectable to a vacuum source for drawing a vacuum;

a second chamber including a cavity for receiving fluid drawn under the vacuum;

a hydrophobic membrane separating the first chamber and the second chamber, the hydrophobic membrane dimensioned to span at least a portion of the cross-sectional area of the collection canister and including one or more lobes extending outwardly relative to a central longitudinal axis extending along a length of the collection canister, the one or more lobes positioned and dimensioned for permitting vacuum draw upon tilting, inverting, or placing the collection canister on a side thereof; and

a divider supporting the hydrophobic membrane between the first chamber and the second chamber, wherein the divider includes reinforcing ribs.