Functional patency rates of arteriovenous fistula of a retrospective cohort study from one of the biggest centers in Canada.

Background: The main barriers to arterio-venous fistula (AVF) utilization are primary failure, long maturation duration, and low secondary patency rates.

Methods: In this retrospective cohort study, primary, secondary, functional primary, and functional secondary patency rates were calculated and compared between two age groups (< 75 years and >  = 75 years) and between radiocephalic (RC-) and upper arm (UA-) AVFs, and factors determining the duration of functional secondary patency were evaluated.

Results: Between 2016 and 2020, 206 predialysis patients whose AVFs had been created previously initiated renal replacement treatment.