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Test Code LAB10185 Urea Nitrogen - 24 Hour Urine

Department

CHEMISTRY

Collection Requirements

24 hour urine.

Do not add preservatives to the collection container.

Keep the container on ice or refrigerated during collection.

Empty bladder and discard, note time, collect all urine for 24 hours placing last void in container.

Note total urine volume.

Primary Collection Container

24 HR Urine container

Transport

Refrigerated

Preferred Transport Temperature

Refrigerated

Processing

Keep specimen refrigerated until processing.

Measure total volume.

Aliquot, centrifuge and refrigerate.

Note total volume on the label.

Stability

Ambient: 8 hours

Refrigerated: 1 week

Frozen: Unacceptable

Minimum Testing Volume

0.5 mL

Reference Range

12-20 gm/24hr

Methodology

Roche c503 Kinetic test with urease and glutamate dehydrogenase.

Performed

Sunday – Saturday

Reported

As completed

CPT Codes

84540