Tests:Urea, Plasma

Overview
Department	Biochemistry
Test Code	PUR
Synonyms	BUN
Base Lab Availability	Monday - Sunday, testing routinely available out of hours
Hawera Lab Availability	Monday - Friday, 8am to 4 30pm
Turnaround Time	1 – 2 hrs
Stability – Add test	24 hrs
Specimen Requirements
Specimen	Plasma Serum
Preferred	6 mL Plain Red-Top
Acceptable	4 mL Li-Hep Green-Top
Unacceptable
Specimen Transportation
Paediatric Requirements	600 µL Li-Hep Microtainer
Aliquot Requirements
Sample
Preferred Volume
Minimum Volume
Aliquot Transportation
Clinical Information
Reference Intervals	1 day – 30 days   1.1 –  6.1 1 month – 1 yr     0.7 –  5.0   2 yrs – 3 yrs       1.1 –  5.0 4 yrs – 6 yrs 1.1 –  5.7 7 yrs – 9 yrs 1.4 –  5.7   10 yrs – 12 yrs 1.8 –  6.4 13 + yrs – Adult 3.2 –  7.7
Test Method	Abbott Alinity c series analyser Enzymatic Kinetic method - Urease
Advanced Notice	Not required
Patient Preparation	Not required
Comments

Owner	Clair Crossley (Crossley1)
Last reviewed	30.01.2026
Next review	30.01.2027 (OK)