Abstract
Insertion of an indwelling stent catheter or ureteric catheterization using a new guide wire (the Radiofocus guide wire) was carried out in a total of 24 subjects. The subjects comprised 16 patients in whom insertion of a conventional guide wire and ureteric catheter was not possible due to previous use of an indwelling stent catheter for extracorporeal shock-wave lithotripsy (ESWL), 2 cases in whom a conventional guide wire could not be inserted due to post-ESWL formation of a stone street, 4 patients with ureteric stenosis and 2 patients with normal ureters in whom catheterization was impossible by the usual methods. Insertion of a Radifocus guide wire into the renal pelvis was successfully accomplished in all 24 cases and an indwelling catheter could be passed in 21 cases. These results suggest that the Radifocus guide wire should make a useful contribution to ESWL therapy. It can also be applied to retrograde pyelography, ureteric obstruction, and the dilation of ureteric stenosis.
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