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UREA NITROGEN, URINE, TIMED

Mnemonic

U TM UN

Synonym

Urea Nitrogen (UN) in Urine - Urine Urea Nitrogen (UUN)

Includes

Urine Urea Nitrogen, Urine Urea Nitrogen/Day

Specimen Collection Requirements

Collect

Preferred: 24 hour urine without preservatives, refrigerate during collection. Also acceptable: Other timed urine collections.

Handling

Collect urine over 24 hours. Refrigerate during collection. Mix urine well before removing aliquot. Record collection time interval and total volume on the transport tube and test request form.

Preferred Volume

2.0 mL urine

Minimum Volume

0.5 mL urine

Transport

Refrigerated (2-8°C)

Stability

Ambient (18-26°C): 48 hours; Refrigerated (2-8°C): 7 days; Frozen (at or below -20°C): 1 month

Testing Information

Performed

7 days/week

Reported

24 hours

Method

Enzymatic

Reference Values

Reference Values

12-20 g/day

CPT Codes

84540

Last Updated: Wednesday, October 10, 2018 02:06:04 PM


Client Services: 503-413-1234