In all 84 patients, 3 patients had two problems.They received further operations for their underlying disease: TUR-Bt (1), PCNL (2) and URSL (2).

• 有5个病人更进一步接受了手术，2个经皮穿肾取石术，2个输尿管镜碎石术，1个经尿道膀胱肿瘤切除术。