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HelpTest Code 24OXA Oxalate, Urine
Specimen Requirements
Specimen Type: 24 hours urine collection with 6N HCL OR 3 g Thymol
Container/Tube: 24 hours urine container containing 6N HCL OR 3 g Thymol
Minimum volume: 20 mL urine
Collection Instructions: Urine must be acidified with 6N HCL OR 3 g Thymol during collection. Keep refrigerated during collection
Please refer to NUH's Urine Preservative Guide
Sample Stability
** Preferred temperatures for storage prior to and during shipping to NUH **
| Specimen Type: | 24hr urine |
|---|---|
| Ambient: | Unacceptable |
| Refrigerate: | 1 week |
| Frozen: | 1 month |
Reference Interval
|
Age |
Male |
Female |
|
0 to <18 years (per m2 BSA) |
<0.5 mmol/day/1.73m2 |
|
|
≥18 years |
0.08 - 0.49 mmol/day |
0.04 - 0.32 mmol/day |
Days and Times Performed
Friday, TAT 2-8 days
Methodology
Spectrophotometry
Service Code
0031973
Update
Last updated 05/09/2024
Updated on Sample Stability Ambient and Frozen.
Unacceptable Condition
| Haemolysis | NA |
|---|---|
| Icterus | NA |
| Lipaemic | NA |
| Others | Urine not preserved with 6N HCL OR 3 g Thymol during collection |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724399
Useful For
Investigation of renal calculi