目的　探讨影响输尿管镜下气压弹道碎石术疗效的因素。　方法　回顾分析采用输尿管镜下气压弹道碎石术治疗输尿管结石 12 6例的临床资料。　结果　一次性碎石成功率 93 7% (118/ 12 6 )。 11例术中取净结石 ,87例 1d～ 7d结石排净 ,2例输尿管穿孔 ,4例结石上移肾盂。结论　输尿管镜入镜是否成功是碎石的前提 ,结石适当固定是碎石成功的关键 ,而结石被上推是导致失败的主要原因 Objective To explore the factors influencing the efficacy of pneumatic lithotripsy under ureteroscopy. Methods The clinical data of 126 cases of ureteral calculi treated by ureteroscopic pneumatic lithotripsy were retrospectively analyzed. Results One-time gravel success rate was 93.7% (118/126). Among the 11 cases, neoplasm was taken, 87 cases were discharged from the stone in 1d to 7d, 2 were ureter perforation, and 4 cases were displaced to the renal pelvis. Conclusion The success of ureteroscopy is the premise of gravel, the proper fixation of stone is the key to the success of gravel, and the stone is the main reason for the failure of the push