urinometer

例句：

1. 1. The doctor used a ureteroscope to examine the patient's kidneys.
   医生使用尿道镜检查患者的肾脏。
2. 2. During the operation, the surgeon inserted a ureterometer to measure the patient's urine output.
   手术中，外科医生插入尿管测量患者的尿量输出。
3. 3. The patient was instructed to empty his bladder before the cystoscope examination.
   患者在膀胱排空后才能进行膀胱镜检查。