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HelpTest Code 24CAU Calcium, Urine, 24 hours
Specimen Requirements
Specimen Type: 24 hours Urine
Container/Tube: The following types of 24hr urine containers are acceptable:
- No preservatives,
- 3g Thymol
Volume: 4000mL
Minimum Volume: 20mL
Collection Instructions: Collect urine in 24-hour urine container with a suitable preservative (available at Laboratory). Dietary and drugs restrictions required.
Please refer to NUH's Urine Preservative Guide
Sample Stability
** Preferred temperatures for storage prior to and during shipping to NUH **
| Specimen Type: | 24 hours Urine |
|---|---|
| Ambient: | 2 days |
| Refrigerate: | 4 days |
| Frozen: | 3 weeks |
Reference Interval
| Calcium-free diet | 0.1 to 1.0 mmol/day |
|---|---|
| Low to average | 1.3 to 3.8 mmol/day |
| Average (800 mg/day or 20 mmol/day) | 2.5 to 7.5 mmol/day |
Days and Times Performed
24 hours, TAT 1 day
Methodology
Arsenazo III
Service Code
31401
Update
Last updated 10/06/2024
Updated on Specimen requirements container/tube
Unacceptable Condition
| Haemolysis | NA |
|---|---|
| Icterus | NA |
| Lipaemic | NA |
| Others | NA |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Evaluation of calcium metabolism