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US 5,132,066 AGranted
Method of forming a bio-compatible vascular prosthesis
AssigneeNewtec V.P. Limited
InventorsDavid Charlesworth, Kerm S. Chian, Christopher J. Underwood
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Abstract
A method of forming a bio-compatible vascular prosthesis comprising making a polymer material by coagulation in which the polymer, dissolved in an organic solvent, is formed into the material in a coagulant, the method being carried out at such low temperature as not substantially to degrade the polymer.
Claims20
A method of forming a bio-compatible vascular prosthesis which comprises the steps of:
- (a) forming a solution of a coagulatable, bio-compatible polymer in an organic solvent;
- (b) extruding the solution through an extrusion head on to a mandrel having an axis being fed axially through the extrusion head together with the extruding solution, the extrusion being directed into a coagulant liquid which coagulates the polymer into a hollow polymer extrusion on the mandrel;
- (c) simultaneously rotating the mandrel and the extrusion head about the axis of the mandrel during the extrusion;
- and
- (d) removing the mandrel to form a vascular prosthesis which closely approximates a natural artery in its elastic extensibility and compressibility.
2 more elements
Dependencies are inferred from the claim text.