目的探讨B超引导建立穿刺通道经皮肾镜气压弹道联合超声碎石术（PCNL）治疗肾结石的疗效。
Objective To evaluate the safety and efficacy of combined pneumatic and ultrasound lithotripsy in percutaneous nephrolithotomy(PCNL) for renal calculi under B-type ultrasound guide.
目的探讨B超引导建立穿刺通道经皮肾镜气压弹道联合超声碎石术（PCNL）治疗肾结石的疗效。
Objective To evaluate the safety and efficacy of combined pneumatic and ultrasound lithotripsy in percutaneous nephrolithotomy(PCNL) for renal calculi under B-type ultrasound guide.
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