fold of left vena cava

例句：

1. 1. The surgeon performed a successful surgery on the patient's left vena cava.
   外科医生成功地为病人的左静脉导管进行了手术。
2. 2. During the operation, the surgeon had to manipulate the left vena cava to access the heart.
   在手术过程中，外科医生必须操作左静脉导管以进入心脏。
3. 3. The left vena cava is responsible for carrying oxygenated blood back to the lungs.
   左静脉导管负责将富含氧气的血液输送回肺部。