尿氮过低

例句：

1. 1. The patient's urine nitrogen level was very low.
   患者的尿氮水平非常低。
2. 2. Hyponatremia is a common complication in patients with diabetes.
   低钠血症是糖尿病患者的常见并发症。
3. 3. During the treatment, the doctor monitored the patient's urine nitrogen levels closely.
   治疗期间，医生密切监测了患者的尿氮水平。