外科医生在手术过程中进行了血管扩张以便插入导管。

The surgeon performed vascular ___dilatation to insert the catheter during the procedure.

医生观察到患者瞳孔的异常扩大。

The doctor observed abnormal ___dilatation of the patient's pupils.

医生建议进行扩张术来治疗她的尿道狭窄问题。

The doctor recommended ___dilation to treat her narrowed urethra.