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HelpTest Code 25OHD Vitamin D 25-Hydroxy
Specimen Requirements
Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume: 5.0mL
Minimum Volume: 0.5mL serum
Collection Instructions: Allow specimen to clot for 30 minutes and centrifuge within 2 hours
Sample Stability
** Preferred temperatures for storage prior to and during shipping to NUH **
| Specimen Type: | Serum |
|---|---|
| Ambient: | 72 hours |
| Refrigerate: | 12 days |
| Frozen: | 1 year |
Reference Interval
| Deficient | ≤ 20 ug/L |
|---|---|
| Insufficient | 21 – 29 ug/L |
| Sufficient | 30 – 100 ug/L |
| Possible toxicity | > 100 ug/L |
Days and Times Performed
24 hours, TAT 1 day
Methodology
Chemiluminescent Immunoassay
Service Code
31036
Update
Last updated 16/05/2024
Updated on Methodology
Unacceptable Condition
| Haemolysis | NA |
|---|---|
| Icterus | NA |
| Lipaemic | NA |
| Others | NA |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Diagnosis of vitamin D deficiency and hypervitaminosis D. Monitoring vitamin D replacement therapy
Alias
25-OH Vitamin D2 and D3, Serum