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Vascular prosthesis having a composite structure

  • US 4,229,838 A
  • Filed: 07/03/1978
  • Issued: 10/28/1980
  • Est. Priority Date: 07/01/1977
  • Status: Expired due to Term
First Claim
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1. A vascular prosthesis having a composite structure of a porous tubing of polytetrafluoroethylene with polyethyleneimine in the pores of the tubing, said polyethyleneimine being water-insolubilized with the amino groups quaternized and having heparin ionically bound thereto.

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