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HelpTest Code 24UA Uric Acid, urine, 24 hr
Laboratory Code
LAB841
Specimen Requirements
Specimen Type: 24 hr urine
Container/Tube: The following types of 24 hr urine containers are acceptable:
- No preservatives
- 3.0 g Thymol
Volume: 4000.0 mL
Minimum Volume: 20.0 mL
Collection Instructions: Collect urine in 24 hr urine container.
Please refer to NUH's Urine Preservative Guide
Specimen Stability
| Specimen Type | 24 hr urine |
|---|---|
| Ambient | 2 days |
| Refrigerate | 2 days |
| Frozen | Not available |
Methodology
Enzymatic Assay
Days and Times Performed
24 hrs, TAT 1 day
Specimen Condition
| Haemolysis | Not applicable |
|---|---|
| Icterus | Not applicable |
| Lipaemia | Not applicable |
| Others | Not applicable |
Reference Interval
| Purine-free diet | |
|---|---|
| Male | < 2.5 mmol/day |
| Female | < 2.5 mmol/day |
| Low purine diet | |
|---|---|
| Male | < 2.8 mmol/day |
| Female | < 2.4 mmol/day |
| High purine diet | < 5.9 mmol/day |
|---|---|
| Average diet | 1.5 – 4.4 mmol/day |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Evaluation of uric acid metabolism.
Investigation of renal calculi.
Service Code
31403
LOINC Code Information
| Urine volume, total | 3167-4 |
|---|---|
| Uric acid, urine | 14934-4 |
| Uric acid, urine, 24 hr | 14935-1 |
Alias
24UA
Update
Last updated 13/03/2025