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Vitamin A
| Item | Value | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Approval req'd? | No | ||||||||
| Available Stat? | No | ||||||||
| Test code | VITA | ||||||||
| Performed by | Quest | ||||||||
| Sendout? | Yes | ||||||||
| Method | HPLC | ||||||||
| Patient Preparation | An 8 hour fast before specimen collection is preferred. | ||||||||
| Collection Instructions | Wrap the tube in aluminum foil to protect it from light. | ||||||||
| Container type | Gold top or Red top | ||||||||
| Amount to Collect | 4 mL blood | ||||||||
| Sample type | Serum | ||||||||
| Preferred volume | 2 mL serum | ||||||||
| Min. Volume | 0.7 mL serum | ||||||||
| UCSF Rejection Criteria | Not protected from light | ||||||||
| Processing notes | Freeze serum at -20C in dark pour-off vial. Order Quest test # 921. | ||||||||
| Ref Lab Rejection Criteria | Received room temperature, received refrigerated but not protected from light. | ||||||||
| Units | µg/dL (mcg/dL) | ||||||||
| Normal range | Age:
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| Stability | Room temperature 1 day, refrigerated 1 week, frozen at -20C, 1 year. | ||||||||
| Turn around times | Test run Monday-Friday. Turnaround time: 2-4 days. | ||||||||
| Additional information | To convert µg/dL to µmol/L (SI units) multiply by 0.0349. | ||||||||
| CPT coding | 84590-90 | ||||||||
| LOINC code | 2923-1 | ||||||||
| Last Updated | 10/2/2010 11:52:47 AM | ||||||||
| Entry Number | 998 |
If you have additional questions regarding this test, please call: 415-353-1667