Tenckhoff peritoneal dialysis (PD) catheter malposition is one of the leading causes of catheter malfunction. Fluoroscopically directed stiff-wire manipulation of malpositioned PD catheters has been advocated as a method of catheter salvage. Two hundred eighty-nine single-cuff PD catheters were placed surgically into 203 patients during this 4-year study. Thirty-three patients developed catheter malfunction attributed to malposition. Fortyeight stiff-wire manipulations were performed on these patients. Thirty-eight (78%) of the manipulations were described as successful at the time of transfer from radiology. However, only 25 (51%) and 12 (25%) resulted in functioning catheters at 1 week and 1 month, respectively. Only 11 of 33 patients who underwent manipulation had functional prolongation of catheter life beyond 1 month. The PD catheter was replaced by a column-disk PD catheter without additional catheter dysfunction in six patients. A second single-cuff Tenckhoff PD catheter was inserted in another six patients. Three of these six catheters again malpositioned. We conclude that stiff-wire manipulation is a useful and safe technique worth using on a limited basis for the initial episode of catheter malposition. Catheters that repetitively malposition should be replaced with a catheter that is resistant to malpositioning.