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US 4,024,871 AGranted
Antimicrobial sutures
AssigneeEthicon, Inc.
InventorMartin Stephenson
Life of this patent
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Abstract
Multifilament suture strands are impregnated with an antimicrobial agent and top coated with a segmented polyurethane polymer. The coated sutures possess antimicrobial properties which are retained during use over extended periods of time.
Claims16
A surgical suture exhibiting antimicrobial properties comprising a multifilament suture strand impregnated with an antimicrobial agent and its entire surface coated with a substantially continuous layer of a segmented polyurethane, said polyurethane initially being free of antimicrobial agent.
A method for preparing an antimicrobial suture comprising the steps of
- a. impregnating the suture with a solution of an antimicrobial agent;
- b. coating the entire surface of the impregnated suture with a solution of a segmented polyurethane polymer in a solvent, said solution being substantially free of antimicrobial agent;
- and
- c. drying the coated suture to remove the solvent and provide the impregnated suture with a substantially continuous covering of segmented polyurethane polymer.
1 more element
Dependencies are inferred from the claim text.