thoracastomy

例句：

1. 1. He underwent a thoracotomy to repair his heart valves.
   他接受了胸骨切除术来修复他的心脏瓣膜。
2. 2. The surgeon performed a sternotomy to access the patient's chest cavity.
   外科医生进行了胸骨切除术以进入病人的胸腔。
3. 3.During the operation, the surgeon made a sternotomy to remove the tumor from the patient's chest.
   在手术过程中，外科医生进行了胸骨切除术，将肿瘤从病人的胸腔中取出。