US 11,864,981 B2
Wound dressing and method of treatment
Julie Allen, Hull (GB); Ben Alan Askem, Leeds (GB); Sarah Jenny Collinson, Hull (GB); Philip Gowans, Doncaster (GB); and Derek Nicolini, Hull (GB)
Assigned to Smith & Nephew PLC, Watford (GB)
Filed by Smith & Nephew PLC, Watford (GB)
Filed on Jul. 30, 2021, as Appl. No. 17/390,795.
Application 16/132,115 is a division of application No. 14/418,874, granted, now 10,076,449, issued on Sep. 18, 2018, previously published as PCT/IB2013/002102, filed on Jul. 31, 2013.
Application 17/390,795 is a continuation of application No. 16/132,115, filed on Sep. 14, 2018, abandoned.
Claims priority of provisional application 61/785,054, filed on Mar. 14, 2013.
Claims priority of provisional application 61/753,878, filed on Jan. 17, 2013.
Claims priority of provisional application 61/753,374, filed on Jan. 16, 2013.
Claims priority of provisional application 61/678,569, filed on Aug. 1, 2012.
Prior Publication US 2021/0353472 A1, Nov. 18, 2021
Int. Cl. A61M 1/00 (2006.01); A61F 13/00 (2006.01); A61F 13/02 (2006.01); A61F 13/15 (2006.01); A61F 13/537 (2006.01); A61M 27/00 (2006.01); A61F 13/53 (2006.01)
CPC A61F 13/15203 (2013.01) [A61F 13/00059 (2013.01); A61F 13/00068 (2013.01); A61F 13/022 (2013.01); A61F 13/0206 (2013.01); A61F 13/0216 (2013.01); A61F 13/5376 (2013.01); A61M 1/90 (2021.05); A61F 2013/00153 (2013.01); A61F 2013/00182 (2013.01); A61F 2013/00497 (2013.01); A61F 2013/00519 (2013.01); A61F 2013/00846 (2013.01); A61F 2013/15243 (2013.01); A61F 2013/530875 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A negative pressure wound therapy apparatus comprising:
a wound dressing having a length, a width, a central longitudinal axis extending along the length and a transverse axis extending along the width perpendicular to the central longitudinal axis, the wound dressing comprising:
a wound contact layer configured to be positioned over a wound and over a skin surrounding the wound;
a material layer above the wound contact layer, the material layer configured to be positioned over the wound and over the skin surrounding the wound, the material layer including a first portion positioned on one side of the transverse axis and a second portion positioned on an opposite side of the transverse axis, wherein the first portion of the material layer comprises side surfaces on opposite sides of the central longitudinal axis, wherein at least a portion of the side surfaces is substantially straight, and wherein the second portion comprises two lobes on opposite sides of the central longitudinal axis;
a backing layer above the material layer, the backing layer configured to be positioned over the wound and over the skin surrounding the wound; and
a port coupled to the backing layer and configured to connect the wound dressing to a source of negative pressure, wherein the port is positioned over the first portion of the material layer on the central longitudinal axis,
wherein the wound dressing is symmetrical about the central longitudinal axis, wherein the backing layer is configured to form a seal with the skin surrounding the wound, wherein the backing layer is in direct contact with the material layer in the region surrounding the port before negative pressure is applied, and wherein the port is attached to an upper surface of the backing layer.