US 12,447,057 B2
Negative pressure wound therapy apparatus
Bryan Greener, York (GB)
Assigned to T.J.Smith and Nephew, Limited, Hull (GB)
Filed by T.J.Smith and Nephew, Limited, Hull (GB)
Filed on Aug. 25, 2022, as Appl. No. 17/895,482.
Application 17/895,482 is a continuation of application No. 16/622,207, granted, now 11,471,333, previously published as PCT/EP2018/065396, filed on Jun. 11, 2018.
Claims priority of provisional application 62/519,762, filed on Jun. 14, 2017.
Prior Publication US 2023/0065604 A1, Mar. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61F 13/05 (2024.01); A61F 13/02 (2024.01); A61F 13/0203 (2024.01); A61F 13/0206 (2024.01); A61F 13/0246 (2024.01); A61M 1/00 (2006.01)
CPC A61F 13/05 (2024.01) [A61F 13/0209 (2013.01); A61F 13/022 (2013.01); A61F 13/0243 (2013.01); A61F 13/0246 (2013.01); A61M 1/784 (2021.05); A61M 1/915 (2021.05); A61M 1/912 (2021.05); A61M 1/985 (2021.05)] 20 Claims
OG exemplary drawing
 
1. A negative pressure wound therapy apparatus, comprising:
a wound dressing comprising a first dressing portion and a second dressing portion overlying the first dressing portion,
the first dressing portion comprising:
a tissue contact layer configured to be positioned in contact with a wound and/or skin surrounding a wound, wherein the tissue contact layer comprises a first border portion at a perimeter of the tissue contact layer;
a first dressing layer; and
a first backing layer comprising a first aperture, wherein the first backing layer comprises a second border portion at a perimeter of the first backing layer, wherein the first dressing layer is positioned between the tissue contact layer and the first backing layer and the first border portion of the tissue contact layer is directly bonded to the second border portion of the first backing layer; and
the second dressing portion comprising:
an intermediate drape comprising a second aperture, wherein the intermediate drape comprises a third border portion at a perimeter of the intermediate drape;
a second dressing layer, and
a second backing layer comprising a fourth border portion at a perimeter of the second backing layer, wherein the second dressing layer is positioned between the intermediate drape and the second backing layer and the third border portion of the intermediate drape is directly bonded to the fourth border portion of the second backing layer; and
wherein the second dressing portion is attached to the first dressing portion such that the first aperture and the second aperture are fluidly connected, and wherein the second border portion of the first backing layer is unattached and not bonded to the third border portion of the intermediate drape.