obstruction of superior vena cava

例句：

1. 1. He was diagnosedwith a superior vena caval obstruction and required immediate surgery.
   他被诊断出患有上腔静脉阻塞症，需要立即进行手术。
2. 2. The patient's condition worsened rapidly due to the obstruction of the superior vena caval system.
   由于上腔静脉系统的阻塞，患者的病情迅速恶化。
3. 3. The medical team worked tirelessly to unblock the superior vena caval obstruction and save the patient's life.
   医疗团队不懈努力，试图解除上腔静脉阻塞，拯救患者的生命。