Of the 43 cases,the percutaneous working tunnel was successfully established in 42 cases(97.7%),while a conversion to open surgery was needed in 1 case because of uncontrolled hemorrhage after puncture.

• 1例经皮肾穿刺后出血不止改开放手术；建立皮肾工作通道成功率97.；7%25(42/43)。