Advanced Diagnostic Laboratories

Collect

Plain red top or SST tube.

Specimen Preparation

Onsite [NJH]: Transport to lab within 1 hour.
Offsite: Separate serum from cells within 2 hours by centrifuge and aliquot into a labeled polypropylene or similar plastic tube.
Preferred volume: 1 mL serum

Pediatric Collection

Minimum volume: 100 mcL serum

Storage Transport Temp

Offsite: Frozen. Send serum Priority Overnight via FedEx and in a well insulated container on dry ice.

Stability

Stability after cell separation:
8 hours at room temperature
24 hours refrigerated at 2-8°C
>24 hours frozen at -20°C

Performed

Monday - Friday

Methodology

Urease Enzymatic

Reported

4 hour routine, 1 hour STAT

Department

Core Lab

Synonyms

Urease Enzymatic (Urea Nitrogen, Serum);BUNX

Reference Interval

Urea Nitrogen, Serum	Human
	Male	Female
	mg/dL
Newborn - 5 years	5-27	5-27
6 years - 15 years	7-22	7-22
16+ years	8-22	8-22

CPT Code

84520