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Vitamin D, 25-Hydroxy
| Item | Value | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Approval req'd? | No | ||||||||
| Available Stat? | No | ||||||||
| Test code | 25HD | ||||||||
| Performed by | China Basin Chemistry | ||||||||
| In House Availability | Test performed Monday, Wednesday, Friday (day shift) only. | ||||||||
| Method | Diasorin Liason – Chemiluminescent Immunoassay | ||||||||
| Container type | Gold top | ||||||||
| Amount to Collect | 3 mL blood | ||||||||
| Sample type | Serum | ||||||||
| Preferred volume | 1.5 mL serum | ||||||||
| Min. Volume | 0.5 mL serum | ||||||||
| Processing notes | Freeze serum at -20C. | ||||||||
| Units | ng/mL | ||||||||
| Normal range | 30-100 ng/mL
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| Synonyms | 25-Hydroxycalciferol; 25-OH-D; Cholecalciferol Metabolite | ||||||||
| Stability | After separation from cells serum is stable at room temperature for 3 days, refrigerated 1 week and frozen at -20C 6 months. | ||||||||
| Additional information | To convert µg/L to nmol/L (SI units) multiply by 2.496.
Reference ranges are based on: 1. Holick MF, Vitamin D status: measurement, interpretation, and clinical application, Annals of Epidemiology, 2009 Feb;19(2):73-8 2. Bischoff-Ferrari HA et al., Estimation of optimal serum concentrations of 25-hydroxyvitamin D for multiple health outcomes, Am J Clin Nutrition, 2006:84:18-28. |
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| LOINC code | 49054-0 | ||||||||
| Last Updated | 5/1/2011 6:02:56 PM | ||||||||
| Entry Number | 1002 | ||||||||
| Lab Procedure Link | Click here for Procedure |
If you have additional questions regarding this test, please call: 415-353-1667