US 12,064,523 B2
Antimicrobial or wound care materials, devices and uses
Amy Brewster, Hull (GB); Robert Crump, Nettleton (GB); Helene Anne Lecomte, York (GB); David Stephenson, Hull (GB); and Matthew Wray, Hessle (GB)
Assigned to Smith & Nephew PLC, Watford (GB)
Filed by Smith & Nephew PLC, Watford (GB)
Filed on Jun. 27, 2023, as Appl. No. 18/215,019.
Application 18/215,019 is a continuation of application No. 16/630,387, granted, now 11,730,852, previously published as PCT/EP2018/069015, filed on Jul. 12, 2018.
Claims priority of application No. 1711183 (GB), filed on Jul. 12, 2017.
Prior Publication US 2023/0414824 A1, Dec. 28, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61L 15/20 (2006.01); A61L 15/42 (2006.01); A61L 15/60 (2006.01)
CPC A61L 15/20 (2013.01) [A61L 15/425 (2013.01); A61L 15/60 (2013.01); A61L 2300/104 (2013.01); A61L 2300/404 (2013.01)] 20 Claims
 
1. Material which is a wound care material comprising:
a flexible polymer foam or fibre matrix comprising a wound facing face and a reverse face or two wound facing faces and therebetween a structural matrix defining a cell network, and
a powder charge comprising a wound dressing additive,
wherein said powder charge is comprised at said wound facing face or said reverse face and within said cell network, wherein said powder charge is within said cell network in diminishing amount with increasing depth within said cell network, and
wherein more than 50% of the powder charge is present within 0.8 mm from a surface of the flexible polymer foam or fibre matrix.
 
7. A method of treating a wound, comprising:
placing a wound dressing comprising a loaded wound dressing layer into or over the wound, wherein the loaded wound dressing layer comprises a porous matrix and a powder charge of antimicrobial release additive loaded within the porous matrix, wherein more than 50% of the powder charge is present within 0.8 mm from a surface of a wound facing surface, and
wherein the antimicrobial release additive is activated for release of an antimicrobial agent into the wound from the wound dressing upon contact with moist or aqueous medium.