Oliguria or anuria; In 2 cases with total cystectomy, prerenal renal failure was regarded as the cause of anuria because of the lower blood pressure during the operation, in fact, obstruction of ureter resulted in anuria. 2例膀胱肿瘤全切术后无尿,因术中低血压而疑肾前性肾功能衰竭,结果为输尿管梗阻所致。