Methods: Retroperitoneal cleavage was obtained by using a waterbag designed by the authous. Eight cases of adrenalectomy, 5 cases of nephrectomy, 1 case of ureterolithotomy and laparoscopic fenestration of 54 cases kidney cyst and polycytic kidneys.

• 方法 :利用自制水囊建立腹膜后腔隙 ,而后用之实施肾上腺切除 8例 ,肾切除 5例 ,输尿管切开取石 1例 ,肾囊肿和多囊肾开窗 5 4例。