dilator

• 名词，指引起身体某部位、孔口或器官扩张或扩大的肌肉、神经、药物或外科器械。

A noun referring to a muscle, nerve, drug, or surgical instrument that causes dilation or widening of a body part, opening, or organ.

1. C1formalmedical

   A muscle or nerve that causes a body part to widen or expand.

   扩张肌

   • The iris dilator muscle controls the size of the pupil.
   • The dilator nerve signals the blood vessels to expand.
   • Damage to the dilator can affect how the eye responds to light.

2. DrugC1formalmedical

   A pharmaceutical substance that causes dilation of blood vessels or other passages.

   扩张剂

   • The doctor prescribed a dilator to improve blood flow.
   • This dilator is used to treat certain heart conditions.
   • The patient responded well to the dilator medication.

3. Surgical instrumentC1formalmedical

   A tool used by surgeons to widen an opening or cavity in the body.

   扩张器

   • The surgeon used a dilator to gently expand the artery.
   • A cervical dilator is often used during certain procedures.
   • The instrument set includes several sizes of dilators.