本研究的目的是經由軟式膀胱鏡置放輸尿管導管至上泌尿道，而不必事先放置一條引導管。我們利用現有的輸尿管導管，將其加長，而使它能很平順的經由軟式膀胱鏡置放上去，六十位男性病人使用這種方法把輸尿管導管經由軟式膀胱鏡置放上去，操作的方法與使用硬式膀胱鏡相同。前30位病患有66%成功率，後30位病患有93%成功率。其中兩位病患是放置雙側輸尿管導管。結論是大多數病患可以經由軟式膀胱鏡把輸尿管導管置放至上泌尿道，而不必事先使用一條引導管。

The purpose of this study was to place a ureteral catheter upward into the upper collecting system by flexible cystoscopy without a preceding guide wire insertion. We used currently available materials to elongate the length of the ureteral catheter so that it was long enough to be passed smoothly through the instrument channel of the flexible cystoscope without a preceding guide wire. Sixty male patients had ureteral catheterization through flexible cystoscopy by this method. Ureteral catheterization was manipulated exactly the same way as in rigid cystoscopy. Sixty-six percent of the first 30 patients and 93% of the second 30 patients had successful ureteral catheterization by this new method. Among them, 2 patients had bilateral ureteral catheterization. We conclude that a ureteral catheter can be placed into the upper collecting system by　flexi-ble cystoscopy without a preceding guide wire in most patients.