Abstract
Objective: To determine the patency rates and reasons for failure using different access routes for tunneled hemodialysis catheters. 
 Methods: The records of patients who underwent insertion of 14 French tunnelled hemodialysis catheters were retrospectively analyzed. Catheter patency survival was demonstrated using Kaplan-Meier survival curve. Catheter failure and exchange reasons were evaluated. 
 Results: One hundred and six patients underwent 474 catheter exchanges (mean/patient 4.47±1.62). Access was via right internal jugular vein (IJV) n=40, left IJV n=23, right femoral vein (FV) n=18, left FV n=11 and transhepatic vein n=14. The causes of catheter failure and exchange were: catheter-associated infection, catheter thrombosis, fibrin sheath and catheter tip malposition. Mean primary and cumulative catheter patency time was higher in the right IJV group (732 and 1337 days, respectively) compared with the others (p
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