VASCULAR PROSTHESES COMPOSED OF POLYTETRAFLUOROETHYLENE

摘要

A vascular prosthesis comprising a tubing of porous polytetrafluoroethylene, the polytetrafluoroethylene tubing having a fibrous structure of notes and fibers connecting the nodes together and having a composite structure in which the fibrous structure at the inside surface of the tubing is finer than the fibrous structure at the outside surface of the tubing.