A comparison between expanded polytetrafluoroethylene and plasma tetrafluoroethylene grafts for hemodialysis access

Animal studies have indicated that plasma tetrafluoroethylene (TFE) may be a better prosthetic material than expanded polytetrafluoroethylene (ePTFE) for arteriovenous access in patients who require hemodialysis because it combines the advantages of both Dacron and Teflon. A randomized clinical trial to compare the two materials was conducted between May 1987 and January 1989. Forty-four patients were enrolled, 22 in each group. The status of the grafts was monitored for at least 18 months. The patency rate for plasma TFE was 59% and for ePTFE was 64%. Kaplan-Meier analysis and Wilcoxon testing revealed no statistical differences between the two groups. Four grafts became infected, two in each group, and one aneurysm developed. Despite its theoretical advantages, plasma TFE was found to be similar to ePTFE as a graft material for hemodialysis.