UREA NITROGEN, URINE

Mnemonic

UUREA24

Synonym

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

Specimen Collection Requirements

Collect

Preferred: 24 hour urine, one sterile acid-free container Also acceptable: Random Urine

Handling

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

Preferred Volume

0.5 mL

Minimum Volume

0.3 mL

Transport

Refrigerated (2-8°C)

Rejection Criteria

Grossly hemolyzed specimens

Stability

UNPRESERVED SPECIMENS: Ambient (18-25°C): 4 hours; Refrigerated (2-8°C): 1 week; Frozen (at or below -20°C): 1 month

Testing Information

Performed

7 days/week

Method

Enzymatic

Referral Lab

Samaritan Health Services Laboratories

Reference Values

Reference Values

Timed Urines: 12-20 g/day or 12,000-20,000 mg/day

CPT Codes

84520

Last Updated: Thursday, January 5, 2017 03:42:33 AM