US 11,793,905 B2
Dressing
Liam Grover, Birmingham (GB); Ann Logan, Birmingham (GB); Felicity De Cogan, Birmingham (GB); and Gurpreet Chouhan, Birmingham (GB)
Assigned to THE UNIVERSITY OF BIRMINGHAM, Birmingham (GB)
Filed by University of Birmingham, Birmingham (GB)
Filed on Aug. 14, 2019, as Appl. No. 16/540,142.
Application 16/540,142 is a continuation of application No. 15/542,865, abandoned, previously published as PCT/GB2016/050061, filed on Jan. 11, 2016.
Claims priority of application No. 1500430 (GB), filed on Jan. 12, 2015.
Prior Publication US 2020/0038544 A1, Feb. 6, 2020
Int. Cl. A61L 15/28 (2006.01); A61L 15/44 (2006.01); A61L 27/34 (2006.01); A61L 27/54 (2006.01)
CPC A61L 15/28 (2013.01) [A61L 15/44 (2013.01); A61L 27/34 (2013.01); A61L 27/54 (2013.01); A61L 2300/252 (2013.01); A61L 2300/258 (2013.01); A61L 2300/40 (2013.01); A61L 2300/416 (2013.01)] 20 Claims
 
1. A process for making a surgical, burn, or wound dressing, the process comprising:
(a) heating about 2% to about 5% w/w gellan gum in a first aqueous liquid, and optionally about 5% w/w or less of a polymer, to form a liquid gellan gum;
(b) cooling the liquid gellan gum;
(c) adding one or more bioactive agents to the cooled liquid gellan gum;
(d) casting the cooled liquid gellan gum to form a sheet having a thickness of about 0.5 mm to about 5 mm; and
(e) drying the sheet; where the sheet is permeable, and where upon rehydration, the sheet is sufficiently transparent to allow a surgical incision, burn, or wound to be viewed.