US 11,737,925 B2
Self contained wound dressing with micropump
Kurt Haggstrom, Huntington Beach, CA (US); Alain Tranchemontagne, Warwick, RI (US); and Loredana Jinga, North Attleboro, MA (US)
Assigned to Smith & Nephew, Inc., Memphis, TN (US)
Filed by Smith & Nephew, Inc., Memphis, TN (US)
Filed on Mar. 18, 2022, as Appl. No. 17/655,520.
Application 12/917,103 is a division of application No. 12/496,263, filed on Jul. 1, 2009, granted, now 7,838,717, issued on Nov. 23, 2010.
Application 17/655,520 is a continuation of application No. 16/239,327, filed on Jan. 3, 2019, granted, now 11,278,658.
Application 16/239,327 is a continuation of application No. 14/480,537, filed on Sep. 8, 2014, granted, now 10,201,644, issued on Feb. 12, 2019.
Application 14/480,537 is a continuation of application No. 13/483,109, filed on May 30, 2012, granted, now 8,829,263, issued on Sep. 9, 2014.
Application 13/483,109 is a continuation of application No. 12/917,103, filed on Nov. 1, 2010, granted, now 8,207,392, issued on Jun. 26, 2012.
Application 12/496,263 is a continuation of application No. 11/517,210, filed on Sep. 6, 2006, granted, now 7,569,742, issued on Aug. 4, 2009.
Claims priority of provisional application 60/714,812, filed on Sep. 6, 2005.
Prior Publication US 2022/0387697 A1, Dec. 8, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 1/00 (2006.01); A61F 13/00 (2006.01); A61F 13/02 (2006.01); A61M 27/00 (2006.01)
CPC A61F 13/0203 (2013.01) [A61F 13/00055 (2013.01); A61F 13/00063 (2013.01); A61F 13/00068 (2013.01); A61F 13/023 (2013.01); A61M 1/732 (2021.05); A61M 1/74 (2021.05); A61M 1/90 (2021.05); A61M 1/962 (2021.05); A61M 1/966 (2021.05); A61M 27/00 (2013.01); A61F 2013/0057 (2013.01); A61F 2013/0091 (2013.01); A61F 2013/00174 (2013.01); A61F 2013/00182 (2013.01); A61F 2013/00553 (2013.01); A61F 2013/00846 (2013.01); A61F 2013/00927 (2013.01); A61F 2013/00944 (2013.01); A61F 2013/00957 (2013.01); A61M 1/915 (2021.05); A61M 1/985 (2021.05); A61M 2205/15 (2013.01); A61M 2205/3592 (2013.01); A61M 2205/8206 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A negative pressure wound treatment apparatus, comprising:
a wound dressing configured to be positioned over a wound and skin surrounding the wound, the wound dressing comprising:
a porous contact layer configured to allow for fluid to pass there through, the porous contact layer positioned over the skin surrounding the wound;
a capillary layer located above the contact layer configured to allow transmission of fluid away from the wound;
an absorbent layer located above the capillary layer configured to form a reservoir for fluid removed from the wound, wherein the absorbent layer comprises a super absorbent polymer material; and
a cover layer located above the absorbent layer;
a negative pressure source configured to apply negative pressure to the wound through the contact layer and through the capillary layer and configured to draw fluid from the wound into the absorbent layer.