aortic dilator

例句：

1. 1.The aortic dilator was designed to prevent blood clots in the arteries.
   主动脉瓣扩张器被设计用来预防动脉中的血块。
2. 2. The patient needed an aortic dilator to relieve his chest pain.
   患者需要使用主动脉瓣扩张器来缓解他的胸痛。
3. 3.The doctor inserted the aortic dilator into the patient's heart to open the valves.
   医生将主动脉瓣扩张器插入患者的心脏，打开瓣膜。