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US 4,905,367 AGranted
Manufacture of stretchable porous sutures
AssigneeCorvita Corporation
InventorsLeonard Pinchuk, John B. Martin
Life of this patent
Estimating the term…
Abstract
A method is provided for manufacturing surgical sutures that have an elastomeric and porous structure. The elastomeric and porous structure is formed from a mixture including a polymer material and an elutable solvent therefor, which mixture is extruded into an aqueous liquid and pulled therethrough.
Claims14
A method for manufacturing a non-braided porous and elastomeric surgical suture, comprising:
- combining an elastomeric polymer material with an organic solvent for the polymer material in order to form an extrudable mixture;
- extruding said extrudable material into an elongated strand including an extrusion of said polymer material having said organic solvent interspersed with the polymer material;
- passing said extruded elongated strand of polymer material interspersed with said organic solvent into and through a supply of liquid within which said organic solvent is soluble and within which said polymer material is substantially insoluble, said passing step including a solvent exchange procedure that elutes said organic solvent from the extrusion and replaces the organic solvent in the extrusion with said liquid;
- and
- removing said liquid form the extrusion so as to provide pores at locations at which said organic solvent has been interspersed with the polymer material during said extruding step, the method forming an elongated flexible and elastomeric suture material having an initially extruded length and a plurality of said pores and being axially stretchable up to about twice its said initially extruded length or more.
2 more elements
A method for manufacturing a non-braided porous and elastomeric polyurethane surgical suture, comprising:
- combining an elastomeric urethane material with an organic solvent for the urethane material in order to form an extrudable urethane mixture;
- extruding said extrudable material into an elongated polyurethane strand including a polymeric extrusion of said urethane material having said organic solvent interspersed with the polyurethane material;
- passing said extruded elongated strand of urethane material interspersed with said organic solvent into and through a supply of liquid within which said organic solvent is soluble and within which said polyurethane material is substantially insoluble, said passing step including a solvent exchange procedure that elutes said organic solvent from the extrusion and replaces the organic solvent in the extrusion with said liquid;
- and
- removing said liquid from the extrusion so as to provide pores at locations at which said organic solvent had been interspersed with the polyurethane material during said extruding step, the method forming an elongated flexible and elastomeric polyurethane suture material having a plurality of said pores.
2 more elements
Dependencies are inferred from the claim text.