Hegar's dilator

例句：

1. 1. The surgeon used a Hegar's dilator to remove the tumor.
   外科医生使用一个海格氏扩张器来切除肿瘤。
2. 2. The patient was given a Hegar's dilator to help with his breathing.
   患者被给予一个海格氏扩张器以帮助呼吸。
3. 3. The procedure involved inserting a Hegar's dilator to access the heart.
   该程序涉及插入一个海格氏扩张器以进入心脏。