Compliance as a factor effecting the patency of a copolyurethane vascular graft

A new solid‐wall vascular graft which has a compliance approximating that of the natural artery has been prepared from a copolyether–urethane material. Six of nine of these compliant grafts implanted in dogs were patent on removal, the longest implant time being 77 days for a 4‐mm I.D. femoral artery graft. This is in contrast to noncompliant grafts of the same copolyurethane in which failure usually occurred within 48 hr.