extended pyelolithotomy

例句：

1. 1. The patient underwent an extended pyelolithotomy to remove thestone.
   患者接受了一次延长的肾盂切开术来取出结石。
2. 2. This surgicalprocedure is often used fortreating complex cases of kidney stones.
   这种手术通常用于治疗复杂的肾结石病例。
3. 3. The extended pyelolithotomy was successful in removing the large stonefrom the patient's kidney.
   这次延长的肾盂切开术成功地从患者的肾脏中取出了大石头。