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Test Code URE Urea, serum

Laboratory Code

LAB140

Specimen Requirements

Submit only one of the following:


Preferred
Specimen Type: Serum
Container/Tube: Gold Top (SSTII) 
Volume: 5.0 mL 
Minimum Volume: 0.5 mL serum
Collection Instructions: Allow specimen to clot for 30 mins and centrifuge within 2 hrs.

 

Acceptable
Specimen Type: Plasma
Container/Tube: Green Top (Li Heparin/PST)
Volume: 4.5 mL
Minimum Volume: 0.5 mL plasma
Collection Instructions: Centrifuge within 2 hrs.

Specimen Stability

Specimen Type Serum
Ambient 7 days
Refrigerate 7 days
Frozen 1 year

Methodology

Enzymatic Assay

Days and Times Performed

24 hrs, TAT 1 day

Specimen Condition

Haemolysis OK
Icterus OK
Gross Lipaemia Alert/Reject
Others Not applicable

Reference Interval

Age Male Female
0 – 14 days 1.0 – 8.2 mmol/L
15 days – < 1 yr 1.2 – 6.0 mmol/L
1 – 9 yrs 3.2 – 7.9 mmol/L
9 – 18 yrs 2.6 – 7.5 mmol/L 2.6 – 6.8 mmol/L
19 – 49 yrs 3.2 – 7.4 mmol/L 2.5 – 6.7 mmol/L
≥ 50 yrs 3.0 – 9.2 mmol/L 3.5 – 7.2 mmol/L

Testing Laboratory

National University Hospital

Clinical Chemistry, 67724346

Useful For

Assessment of renal function.

Evaluation of protein metabolism.

Service Code

31116

LOINC Code Information

14937-7

Alias

Blood Urea Nitrogen (BUN), Serum

Update

Last updated 13/03/2025