US 9,808,561 B2
Wound dressing and method of use
Gordon Campbell Adie, Cottingham (GB); Sarah Jenny Collinson, Hull (GB); Christopher John Fryer, York (GB); Edward Yerbury Hartwell, Hull (GB); Derek Nicolini, Hull (GB); and Yannick Louis Peron, East Yorkshire (GB)
Assigned to Smith & Nephew PLC, London (GB)
Filed by Smith & Nephew PLC, London (GB)
Filed on May 18, 2015, as Appl. No. 14/715,399.
Application 14/715,399 is a continuation of application No. 13/092,042, filed on Apr. 21, 2011, granted, now 9,061,095.
Claims priority of application No. 1006983.9 (GB), filed on Apr. 27, 2010; application No. 1006985.4 (GB), filed on Apr. 27, 2010; application No. 1006986.2 (GB), filed on Apr. 27, 2010; application No. 1006988.8 (GB), filed on Apr. 27, 2010; and application No. 1008347.5 (GB), filed on May 19, 2010.
Prior Publication US 2015/0320604 A1, Nov. 12, 2015
Int. Cl. A61M 35/00 (2006.01); A61M 1/00 (2006.01); A61F 13/00 (2006.01); A61F 13/02 (2006.01); A61M 27/00 (2006.01)
CPC A61M 1/0088 (2013.01) [A61F 13/00068 (2013.01); A61F 13/022 (2013.01); A61M 1/008 (2013.01); A61M 1/009 (2014.02); A61F 13/00012 (2013.01); A61F 2013/0054 (2013.01); A61F 2013/00174 (2013.01); A61F 2013/00238 (2013.01); A61F 2013/00536 (2013.01); A61M 2202/0014 (2013.01); A61M 2205/7536 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A wound treatment apparatus comprising:
a wound dressing comprising:
a liquid and gas permeable transmission layer;
an absorbent layer for absorbing wound exudate, the absorbent layer overlying the transmission layer;
a gas impermeable cover layer overlying the absorbent layer and comprising a first orifice, wherein the cover layer is moisture vapor permeable;
a suction port overlying the first orifice, the suction port comprising:
a connector portion configured to connect the suction port to a source of negative pressure; and
a sealing surface sealed to an outer surface of the cover layer;
a filter element overlying the opening in the first orifice in the cover layer and underlying at least a portion of the suction port, the filter element comprising a flat, microporous membrane configured to stop any liquid in the wound exudate from entering the connector portion, the filter element oriented parallel to the cover layer and having a dimension that is larger than that of the first orifice;
a wound contact layer underlying the transmission layer, wherein the cover layer and the wound contact layer extend outwards from a central region of the dressing beyond an edge region of the absorbent layer to thereby form a peripheral region, the cover layer and the wound contact layer being sealed together in the peripheral region, and
wherein the absorbent layer comprises a second orifice underlying the first orifice.