US 12,076,213 B2
Multilayered primary contact wound dressing
Alexander Waite, Cowling (GB); and Katherine A. Bourdillon, Leeds (GB)
Assigned to KCI USA, Inc., San Antonio, TX (US)
Appl. No. 16/762,234
Filed by SYSTAGENIX WOUND MANAGEMENT, LIMITED, West Sussex (GB); and KCI USA, INC., San Antonio, TX (US)
PCT Filed Nov. 7, 2018, PCT No. PCT/US2018/059620
§ 371(c)(1), (2) Date May 7, 2020,
PCT Pub. No. WO2019/094466, PCT Pub. Date May 16, 2019.
Claims priority of provisional application 62/584,010, filed on Nov. 9, 2017.
Prior Publication US 2020/0345557 A1, Nov. 5, 2020
Int. Cl. A61F 13/01 (2024.01); A61F 13/00 (2024.01); A61F 13/05 (2024.01); A61L 15/22 (2006.01); A61L 15/32 (2006.01); A61L 15/42 (2006.01); A61L 15/64 (2006.01)
CPC A61F 13/01029 (2024.01) [A61F 13/00063 (2013.01); A61F 13/01012 (2024.01); A61F 13/05 (2024.01); A61L 15/225 (2013.01); A61L 15/325 (2013.01); A61L 15/425 (2013.01); A61L 15/64 (2013.01); A61F 2013/00221 (2013.01); A61L 2300/104 (2013.01); A61L 2300/106 (2013.01); A61L 2300/206 (2013.01); A61L 2300/21 (2013.01); A61L 2300/232 (2013.01); A61L 2300/402 (2013.01); A61L 2300/404 (2013.01); A61L 2300/41 (2013.01); A61L 2430/34 (2013.01)] 22 Claims
 
1. A wound contact dressing comprising:
a first bioresorbable sponge configured to degrade over a first predetermined amount of time, the first bioresorbable sponge comprises a first plurality of fluid channels that cut through the first bioresorbable sponge;
a first collagen-based film substantially covering a first face of the first bioresorbable sponge and lining an internal wall of each of the first plurality of fluid channels;
a second bioresorbable sponge configured to degrade over a second predetermined amount of time, the second bioresorbable sponge comprises a second plurality of fluid channels that cut through the second bioresorbable sponge;
a second collagen-based film between the first bioresorbable sponge and the second bioresorbable sponge, the second collagen-based film substantially covering a first face of the second bioresorbable sponge and lining an internal wall of each of the second plurality of fluid channels; and
a third collagen-based film substantially covering a second face of the second bioresorbable sponge.