retrograde embolus

例句：

1. 1. The patient's condition worsened after the surgery, and a retrograde embolus was suspected.
   手术后，病人的状况恶化了，怀疑有倒退栓塞。
2. 2.The doctor performed an emergency catheterization to remove the retrograde embolus.
   医生紧急进行了导管插入术，以移除倒退栓塞。
3. 3. The patient was admitted to the hospital for further treatment of the retrograde embolus.
   患者因倒退栓塞被送往医院接受进一步治疗。