Apparatuses and methods for negative pressure wound therapy

• US 9,642,750 B2
• Filed: 02/08/2016
• Issued: 05/09/2017
• Est. Priority Date: 12/22/2009
• Status: Active Grant

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Inventors: Albert, Sean, Armstrong, Ed, Beaudoin, Ken, Blackburn, Iain Michael, Bussone, Phil, Crawford, Brendan, Emmerson, Robert, Ewaschuk, Mike, Gianelis, Stephen, Goddard, Andrew, Gordon, Joseph, Guarraia, Mark, Johnson, Tim, Keith-Lucas, Darwin, Linton, Andrew, Nelsen, Dan, Salame, Michael, Stern, Tim, White, Mark
• Primary Examiner(s): Wiest, Philip R
• Application Number:
  US15/018,724
• Publication Number:
  US 20160151548A1
• Time in Patent Office: 456 Days
• Field of Search: 604313-324
• CPC Class Codes: A61F 13/02 Adhesive bandages or dressings
• CPC Class Codes: A61F 13/0206 with absorbent fibrous layers, e.g. woven or non-woven absorbent pads or island dressings
• CPC Class Codes: A61F 13/022 having more than one layer with different fluid retention characteristics
• 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 2013/00174 possibility of applying pressure
• CPC Class Codes: A61F 2013/00238 characterised by way of knitting or weaving
• CPC Class Codes: A61F 2013/00536 for draining or irrigating wounds
• CPC Class Codes: A61F 2013/0057 with openable cover
• CPC Class Codes: A61F 2013/0074 containing foams
• CPC Class Codes: A61F 2013/00846 with transparent or translucent part
• CPC Class Codes: A61M 1/86 Connectors between drainage tube and handpiece, e.g. drainage tubes detachable from handpiece
• CPC Class Codes: A61M 1/90 Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
• CPC Class Codes: A61M 1/912 Connectors between dressing and drainage tube
• CPC Class Codes: A61M 1/913 having a bridging element for transferring the reduced pressure from the connector to the dressing
• CPC Class Codes: A61M 1/915 Constructional details of the pressure distribution manifold
• CPC Class Codes: A61M 1/962 having pumping means on the suction site, e.g. miniature pump on dressing or dressing capable of exerting suction
• CPC Class Codes: A61M 1/964 having venting means on or near the dressing
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 2205/7518 bacterial
• CPC Class Codes: A61M 39/20 Closure caps or plugs for connectors or open ends of tubes

Abstract

Disclosed herein are several embodiments of a negative pressure appliance and methods of using the same in the treatment of wounds. Some embodiments are directed to improved fluidic connectors or suction adapters for connecting to a wound site, for example using softer, kink-free conformable suction adapters.

Claims

1. An apparatus to provide suction to a wound site comprising:

a suction adapter configured to be sealed to a wound cover covering a wound site, the suction adapter comprising;

an applicator configured to be positioned over an opening in the wound cover, the applicator comprising at least one aperture; and

a bridge portion connected to the applicator and comprising at least a first channel and a second channel extending parallel to an upper surface of the applicator, wherein at least one of the first channel and second channel is configured to provide suction to the wound site through the aperture in the applicator from a source of negative pressure;

a visualization window provided in an upper surface of the bridge portion over the at least one aperture in the applicator that provides unobstructed visualization from outside of the suction adapter, through the visualization window and through the aperture in the applicator;

wherein the bridge portion comprises material extending downwardly from the upper surface of the bridge portion to thereby connect the bridge portion to the applicator; and

an intermediate wall extending perpendicularly from the downwardly extending material to partition the first channel from the second channel.

2. The apparatus of claim 1, wherein the visualization window comprises an at least partially transparent material.

3. The apparatus of claim 1, wherein the visualization window is configured to permit visualization of the wound site prior to sealing the suction adapter to the wound cover.

4. The apparatus of claim 1, wherein the visualization window is configured to permit monitoring of the wound site while the apparatus is providing suction to the wound site.

5. The apparatus of claim 1, wherein the visualization window comprises polyurethane.

6. The apparatus of claim 1, wherein the visualization window is positioned at a distal end of the bridge portion.

7. The apparatus of claim 1, wherein the intermediate wall is positioned at the distal end of the bridge portion.

8. The apparatus of claim 1, wherein the first channel is configured to provide suction to the wound site and the second channel is configured to provide vented air to the wound site.

9. The apparatus of claim 1, wherein the first channel and the second channel are formed as side by side conduits.

10. The apparatus of claim 1, wherein the bridge portion comprises a proximal end configured to provide fluid communication with the source of negative pressure and an enlarged distal end provided over the applicator, wherein the first and second channels extend between the proximal and distal ends.

11. The apparatus of claim 10, wherein the applicator has an area that is larger than an area of the enlarged distal end of the bridge.

12. The apparatus of claim 10, wherein the visualization window is provided at the enlarged distal end.

13. The apparatus of claim 10, wherein the enlarged distal end of the bridge portion comprises an aperture positioned over the aperture in the applicator and configured to be positioned over the wound site to fluidically connect the wound site to the source of negative pressure.

14. The apparatus of claim 1, wherein the applicator further comprises an adhesive provided on a lower surface of the applicator, and wherein the adhesive is configured to seal the applicator to the drape.

15. The apparatus of claim 1, further comprising a wound cover for covering the wound site.

16. The apparatus of claim 15, wherein the wound cover comprises a drape.

17. The apparatus of claim 1, wherein the intermediate wall extends substantially parallel to the first and second channels.

18. A suction device for a negative pressure wound therapy system, said suction device comprising an attachment portion adapted to be attached to a wound cover member, said suction device comprising a fluid inlet being at least partially circumscribed by said attachment portion, said suction device also comprising a fluid outlet, said suction device further comprising a connection portion adapted to, at least during one operation condition of said suction device, provide a fluid communication between said fluid inlet and said fluid outlet, said connection portion comprising an inspection portion that is transparent to thereby facilitate the positioning of said suction device relative to said wound cover member, wherein said connection portion comprises a duct wall at least partially defining a connection duct from said inlet to said outlet, said duct wall comprising said inspection portion, said connection portion comprising a partition wall extending at least partially from said duct wall.

19. The suction device of claim 18, wherein the duct wall comprises a portion extending downwardly from an upper surface of the connection portion to thereby connect the connection portion to the attachment portion.

20. The suction device of claim 19, wherein the partition wall extends perpendicularly from the downwardly extending portion of the duct wall.

21. The suction device according to claim 18, wherein said fluid outlet extends in a longitudinal direction (L), said partition wall extending in a partition wall extension (E_PW) that is substantially parallel to said longitudinal direction (L).

22. A kit for a negative pressure wound therapy system, said kit comprising:

a suction device according to claim 18;

a wound cover member adapted to be attached over a wound.

23. The kit according to claim 22, wherein said wound cover member comprises a wound cover film.

24. The kit according to claim 22, wherein said kit further comprise fluid communication means adapted to provide a fluid communication between said fluid outlet and a negative pressure source.