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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
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