retrocolic anastomosis

例句：

1. 1.This surgery is typically performed for patients with severe obstruction of the small intestine.
   这种手术通常用于严重阻塞小肠的患者。
2. 2. The patient was admitted to the hospital for further evaluation and treatment.
   患者被送往医院进行进一步的评估和治疗。
3. 3.The success rate of this surgery has been improving over time.
   这种手术的成功率随着时间的推移而提高。