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We treated 5 cases of severe hydronephrosis with balloon dilation. Those hydronephrosis were due to the ureteral stricture with small stone fragments after ESWL (Lithostar). In each case, in situ ESWL had been done on a long-lodged ureteric stone with severe hydronephrosis. And even after the disintegration of stone with ESWL, hydronephrosis remained due to ureteral stricture with small stone fragments. Balloon dilation was done through percutaneous nephrostomy tract in 4 cases and via retrograde transurethral routine in 1 case. Balloon dilation catheter (7 fr. 6 mm diameter 4-10 cm length, Bard Co.) was used. There was no need for stone extraction. After dilation, ureteric stents (8.2/7 fr.) were kept in place for 4-8 weeks. Intravenous urogram was taken on 4-8 weeks after removing ureteric stents. In all of the 5 cases, improvement of hydronephrosis was remarkable. And there was no residual stone fragments in 4 cases. It is concluded that balloon dilation for ureteral stricture with stone fragments after ESWL is very useful. For the valid evaluation of balloon dilation, further experience and longer observation are requisite.

BALLOON DILATION FOR URETERAL STRICTURE WITH STONE FRAGMENTS AFTER ESWL