US 12,083,232 B2
Wound care materials, devices and uses
Anthony Dagger, York (GB); and Helene Anne Lecomte, York (GB)
Assigned to Smith & Nephew PLC, Watford (GB)
Appl. No. 16/630,402
Filed by Smith & Nephew PLC, Watford (GB)
PCT Filed Jul. 12, 2018, PCT No. PCT/EP2018/069014
§ 371(c)(1), (2) Date Jan. 10, 2020,
PCT Pub. No. WO2019/012068, PCT Pub. Date Jan. 17, 2019.
Claims priority of application No. 1711179 (GB), filed on Jul. 12, 2017.
Prior Publication US 2021/0146000 A1, May 20, 2021
Int. Cl. A61F 13/00 (2024.01); A61F 13/01 (2024.01); A61F 13/05 (2024.01); A61L 15/18 (2006.01); A61L 15/22 (2006.01); A61L 15/26 (2006.01); A61L 15/28 (2006.01); A61L 15/46 (2006.01); A61L 15/60 (2006.01); A61F 13/0206 (2024.01); A61M 1/00 (2006.01)
CPC A61L 15/225 (2013.01) [A61F 13/00063 (2013.01); A61F 13/01012 (2024.01); A61F 13/01017 (2024.01); A61F 13/01042 (2024.01); A61F 13/05 (2024.01); A61L 15/18 (2013.01); A61L 15/26 (2013.01); A61L 15/28 (2013.01); A61L 15/46 (2013.01); A61L 15/60 (2013.01); A61F 13/0209 (2013.01); A61L 2300/102 (2013.01); A61L 2300/104 (2013.01); A61L 2300/108 (2013.01); A61L 2300/404 (2013.01); A61M 1/79 (2021.05)] 17 Claims
OG exemplary drawing
 
1. Material comprising a flexible porous hydrophilic polymer foam or fibre matrix comprising two matrix faces and therebetween a structural matrix framework defining a network of cells, having a cell network surface and therein a network of pores and
a powder charge comprising an antimicrobial additive,
wherein said powder charge is comprised at said matrix face or faces and/or within said cell network or within said structural matrix framework
and wherein the additive is micronized,
wherein the micronized additive has loss on drying (L.O.D) less than 2% and/or
said powder charge additionally comprises flowing agent and/or bulking agent wherein micronized additive is co-located with said flowing agent and/or bulking agent;
wherein the antimicrobial additive comprises silver salt.
 
2. A wound dressing, comprising:
a loaded wound dressing layer comprising:
a porous polymer foam matrix comprising a wound facing face and a reverse face; and
a powder charge of micronized antimicrobial release additive loaded within the matrix;
wherein the antimicrobial release additive comprises silver salt;
wherein the antimicrobial release additive has a particle size distribution of 1 micron<D50<30 micron.