Sim & McBurney
Implantable material
 Porous polymeric material, which, in tubular form, is suitable for use as a vascular graft, is made by a procedure wherein polymeric fibres are wound on a mandrel while overlying fibres are simultaneously bonded together. In one preferred embodiment, a viscous solution of a biocompatible polymer is extruded from a spinnaret to form a plurality of filaments which are wound on a rotating mandrel as the spinnaret reciprocates relative to the mandrel. The filaments are wet as they contact each other, so that on evaporation of the solvent the fibres become bonded to each other. 
Ontario Research Foundation
A B A B B B
A61L B29K A61F B29C B29C B29L
inventional additional inventional additional inventional additional
Edward W. C.
Wong