Objective:To observe the safety and efficacy of ropivacaine combined with tramadol in variable doses for lumber anesthesia in the transurethral prostatic electroresection of the aged.

• 目的:观察小剂量罗比卡因复合不同剂量曲马多腰麻用于老年前列腺汽化电切术的有效性、安全性。