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Vitamin B1, blood
| Item | Value |
|---|---|
| Approval req'd? | No |
| Available Stat? | No |
| Test code | VIB1 |
| Performed by | Quest |
| Sendout? | Yes |
| Collection Instructions | Wrap tube in foil to protect from light. |
| Container type | Lavender top |
| Amount to Collect | 3 mL blood |
| Sample type | EDTA whole blood |
| Preferred volume | 3 mL blood |
| Min. Volume | 1 mL blood |
| Processing notes | Do not centrifuge. Transfer whole blood to light-safe plastic tube for shipping and freeze at -20C. Order Quest test #29983P. |
| Ref Lab Rejection Criteria | Sample received refrigerated AND unprotected from light. |
| Units | nmol/L |
| Normal range | 78-185 nmol/L |
| Synonyms | Thiamine Pyrophosphate; Transketolase; Beriberi |
| Stability | Sample stable at RT for 3 days refrigerated for 5 days, and frozen at -20C for 5 weeks |
| Turn around times | 5-8 days |
| Additional information | This is the bioactive form of Vitamin B1, and is a suitable replacement for the transketolase assay. Vitamin B1 is required for branched-chain amino acid and carbohydrate metabolism. Vitamin B1 deficiency is most often due to alcoholism or chronic illness. In the early stage, patients with Vitamin B1 deficiency exhibit anorexia, irritability, apathy, and generalized weakness. Prolonged deficiency causes beriberi. |
| CPT coding | 84225-90 |
| LOINC code | 3000-7 |
| Last Updated | 3/7/2013 9:19:53 AM |
| Entry Number | 897 |
If you have additional questions regarding this test, please call: 415-353-1667