US 11,723,809 B2
Wound treatment apparatuses and methods with negative pressure source integrated into wound dressing
Ben Alan Askem, Brough (GB); Victoria Beadle, Hull (GB); John Philip Gowans, Hessle (GB); Mark Hesketh, Royston (GB); Allan Kenneth Frazer Grugeon Hunt, Beverley (GB); William Kelbie, Inverness (GB); Damyn Musgrave, Cottenham (GB); and Joseph William Robinson, Papworth Everard (GB)
Assigned to Smith & Nephew PLC, Watford (GB)
Appl. No. 16/82,884
Filed by Smith & Nephew PLC, Watford (GB)
PCT Filed Mar. 6, 2017, PCT No. PCT/EP2017/055225
§ 371(c)(1), (2) Date Sep. 6, 2018,
PCT Pub. No. WO2017/153357, PCT Pub. Date Sep. 14, 2017.
Claims priority of provisional application 62/327,537, filed on Apr. 26, 2016.
Claims priority of provisional application 62/305,926, filed on Mar. 9, 2016.
Claims priority of provisional application 62/304,910, filed on Mar. 7, 2016.
Claims priority of provisional application 62/304,790, filed on Mar. 7, 2016.
Prior Publication US 2019/0021911 A1, Jan. 24, 2019
Int. Cl. A61F 13/00 (2006.01); A61M 1/00 (2006.01); A61M 39/24 (2006.01); A61F 13/02 (2006.01)
CPC A61F 13/00068 (2013.01) [A61F 13/0216 (2013.01); A61M 1/782 (2021.05); A61M 1/784 (2021.05); A61M 1/80 (2021.05); A61M 1/962 (2021.05); A61M 39/24 (2013.01); A61M 1/74 (2021.05); A61M 2039/2433 (2013.01); A61M 2205/3344 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A wound dressing apparatus comprising:
a wound dressing configured to be positioned over a wound site, the wound dressing comprising a wound contact layer configured to be positioned in contact with the wound site, an absorbent layer, and a cover layer configured to cover and form a seal over the wound contact layer and the absorbent layer;
a negative pressure source disposed on or positioned within the wound dressing, the negative pressure source comprising an inlet and an outlet and being operable to apply negative pressure to the wound site; and
a non-return valve enclosure positioned within the wound dressing and in fluid communication with the outlet, the non-return valve enclosure comprising a non-return valve being configured to inhibit back flow of air into the wound dressing, the non-return valve enclosure comprising a cavity with an inlet port and an outlet port.