Patent ID: 9358318
Filing Date: 2016-06-07
CPC Classification: A61K,A61L,A61P

Claim Text:
1. A method for making a multilayered wound dressing having a first absorbable nonwoven fabric that comprises fibers comprised of aliphatic polyester polymers or copolymers of one or more monomers selected from the group consisting of lactic acid, lactide, glycolic acid, glycolide, ε-caprolactone, p-dioxanone, and trimethylene carbonate; one or more second absorbable woven or knitted fabric that comprises oxidized polysaccharides; thrombin and fibrinogen, comprising the steps of: (a) crimping absorbable polymer fibers or yarns in the range of about 10 to 30 crimps per inch; (b) cutting the crimped fibers or yarns to a staple length between about 0.1 and 2.5 inch; (c) carding the staple to form the first absorbable nonwoven fabric; (d) attaching the first absorbable nonwoven fabric to the second absorbable woven or knitted fabric to form a multilayered wound dressing; (e) applying thrombin and fibrinogen as a suspension in a liquid carrier onto the first absorbable nonwoven fabric, wherein said liquid carrier is a perfluorinated hydrocarbon in which thrombin and fibrinogen are not soluble, and; (f) drying said multilayered wound dressing.