Test Code OXCR Oxalate : Creatinine Ratio, urine

Laboratory Code

LAB3041690

Specimen Requirements

Specimen Type: Random urine specimen without preservatives

Container/Tube: Sterile screw-capped sterile urine container without preservatives

Volume: 100.0 mL

Minimum Volume: 20.0 mL urine

Collection Instructions: Collect mid-stream urine in preservative-free urine container. Unacidified urine.

Specimen Stability

Specimen Type	Urine
Ambient	Not available
Refrigerate	6 days (preferred)
Frozen	1 month

Panel Information

Panel includes the following tests:

Oxalate, urine
Creatinine, urine

Methodology

Spectrophotometry

Days and Times Performed

Friday, TAT 2 - 8 days

Specimen Condition

Haemolysis	Not applicable
Icterus	Not applicable
Lipaemia	Not applicable
Others	Not applicable

Reference Interval

Age	mmol/mmol
1 – < 6 mths	0.07 – 0.22
6 mths – < 1 yr	0.06 – 0.17
1 – < 2 yrs	0.05 – 0.13
2 – < 3 yrs	0.04 – 0.10
3 – < 5 yrs	0.03 – 0.08
5 – < 7 yrs	0.03 – 0.07
7 – < 10 yrs	0.02 – 0.06
10 – < 14 yrs	0.02 – 0.06
14 – 17 yrs	0.02 – 0.06

Testing Laboratory

National University Hospital
Clinical Chemistry, 67724399

Useful For

Investigation of renal calculi

Service Code

31973

LOINC Code Information

Oxalate : Creatinine ratio	34350-9
Oxalate, urine	15086-2
Creatinine, urine	14683-7

Update

Last updated 24/02/2025