Background: The present study provides a contemporary and comprehensive summation of midterm patency rates of polyester (Dacron) or polytetrafluoroethylene (PTFE) grafts in femoropopliteal bypass grafting based on a meta-analysis consisting only of randomized controlled trials.
Methods: MEDLINE, EMBASE, and the Cochrane Central Register of Controlled Trials were searched to identify all randomized controlled trials of Dacron vs PTFE grafts in femoropopliteal bypass grafting. Seven trials were found. Survival data were combined to yield the pooled cumulative primary patency. We estimated the log hazard ratio (HR) for each 1-month interval and then combined the HRs in a stratified way across intervals to obtain an overall log HR for each trial. Study-specific estimates were combined using inverse variance-weighted averages of logarithmic HRs in fixed-effects and random-effects models.
Results: The pooled cumulative primary patency of Dacron and PTFE grafts was, respectively, 60.2% (95% confidence interval [CI], 56.4%-64.0%) and 53.8% (95% CI, 46.8%-60.9%) at 3 years, and 49.2% (95% CI, 45.6%-52.7%) and 38.4% (95% CI, 32.2%-44.6%) at 5 years. Pooled analysis of the seven trials demonstrated no difference in HR for graft occlusion with Dacron relative to PTFE grafts (random-effects HR, 0.87; 95% CI, 0.67-1.12; P = .27 for effect; P = .03 for heterogeneity).
Conclusion: Either Dacron or PTFE grafts can be used in femoropopliteal bypass grafting with no significant differences in midterm graft patency at 5 years (49.2% vs 38.4%) when the autologous saphenous vein is unavailable.
Copyright (c) 2010 Society for Vascular Surgery. Published by Mosby, Inc. All rights reserved.