Distal arteriovenous fistulas in elderly hemodialysis patients

Dialysis access procedures and complications are an important cause of morbidity and hospitalization for chronic hemodialysis patients. Subjects over 65 years old have a higher incidence of co-morbid factors (diabetes mellitus, atheros clerosis, neoplasms, heart failure), therefore the correct choice in terms of timing and type of permanent access is extremely important. As elbow fistulas are often complicated by heart failure and PTFE grafts have a higher risk of thrombosis, we decided to evaluate the success rate of distal fistula as primary dialysis access in elderly patients. We carried out a retrospective study to identify survival predictors and actual vascular network saving. Between January 1991 and September 2000, 277 vascular access procedures were performed on 198 elderly patients (age 65 or older). The first anastomosis was positioned as peripherally as possible. In cases of patients with poor peripheral vasculature or three co-morbid factors, vascular access was first created at the origin of radial artery (Toledo-Pereyra fistula). Survival (Kaplan - Meyer analysis) was significantly higher for Toledo-Pereyra fistulas compared to wrist and snuff-box ones, in spite of the presence of a high incidence of co-morbid factors. We conclude that Toledo-Pereyra fistula is an efficient primary choice in elderly patients.