Performance of a longitudinally compliant PTFE vascular prosthesis in an ovine A-V fistula model.
Nine chronic implants of 6 mm diameter vascular grafts were performed in an ovine model to compare the performance of the longitudinally compliant Ultraflex PTFE-Plus vascular prosthesis with that of the Gore-Tex reinforced expanded polytetra fluoroethylene (PTFE) graft. Implants were performed in the sheep neck as right carotid to left jugular arterio-venous (A-V) grafts. Grafts were explanted after 6 months unless they occluded earlier. The Ultraflex graft demonstrated superior handling characteristics during implant. Patency rate at 6 months was 60% (three of five) for the Ultraflex graft (experimental graft by Baxter Edwards, CVS Division, Irvine, CA), and 25% (one of four) for the Gore-Tex graft (WL Gore & Associates, Inc., Flagstaff, AZ). The Gore-Tex prosthesis had more calcification of the graft wall.
Kenney
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Riverside Community Hospital, Department of Surgery, California.
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Peterson
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D000818:Animals; D001166:Arteriovenous Shunt, Surgical / Q000295:instrumentation*; D001807:Blood Vessel Prosthesis; D003187:Compliance; D004730:Endothelium, Vascular / Q000473:pathology; D011138:Polytetrafluoroethylene; D011474:Prosthesis Design; D012756:Sheep; D013499:Surface Properties; D014654:Vascular Patency / Q000502:physiology; D014945:Wound Healing / Q000502:physiology
D011138:Polytetrafluoroethylene