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Test Code URUUN Urea Nitrogen, 24 Hour, Urine

Performing Laboratory

Mary Washington Healthcare-Department of Pathology and Laboratory Medicine-Chemistry

Specimen Requirements


Container/Tube:  24-hour urine container - No preservative.

Volume:  Entire 24-hour urine collection

Transport Temperature:  Refrigerate

Collection Instructions: 

1. Follow instructions in "Urine Collections: in "Special Instructions".

2. Discard first-morning urine.

3. Collect urine throughout rest of day and first-morning of next day.

Note:  Label specimen appropriately (urine).

Reference Values

An interpretive report will be provided.

Day(s) Test Set Up

Monday through Sunday

Special Instructions