1. Objective To explore of percutaneous antegrade endopyelotomy using the holmium laser for ureteropelvic junction obstruction(UPJO)associated with upper tract stones.
目的探讨经皮肾微造瘘钬激光腔内切开治疗肾盂输尿管交界处狭窄（UPJO）的方法及疗效。
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2. Objective To explore of percutaneous antegrade endopyelotomy using the holmium laser for ureteropelvic junction obstruction(UPJO)associated with upper tract stones.
