Treating ureteral calculi with U100 frequency-doubled double pulse Nd∶ YAG laser (Report of 260 cases)

Objective:To evaluate the clinical effect of U100 frequency-doubled double pulse Nd:YAG laser lithotripsy for ureteral calculi.Methods:Totally 260 cases with ureteral calculi treated via endoscope with FREDDY was summarized.Results:The successful rate was 93.1%(54/58) in the proximal ureteral calculi, 97.4%(153/157) in the middle ureteral calculi, 97.7%(44/45) in the distal ureteral calculi and 96.5%(251/260) in all.There was no difference among the 3 groups(P 0.05).The meantime of operation was 25 minutes(7~45 min) and the laser worked ( 5.5± 3.5)minutes in average.The stone expectoration time was 12(2～21)days.The mean post-operation hospitalization was 2.5(1~6)days. Different degrees of hematuria were seen in 43.0%(112/260) cases after operation. No major complications such as high fever, perforation or pyonephrosis were observed.Conclusions:FREDDY is a kind of laser with little damage to the soft tissue and high efficiency of lithotripsy. It is an effective, simple and reliable method for the treatment of ureteral calculi.