Vitamin B1, Whole Blood - Recommended

Sunquest Code:VB1WB  
Epic Code:LAB745Epic Name:Vitamin B1, Whole Blood
Synonyms:Thiamine, Whole Blood
Methodology:High performance liquid chromatography
Turnaround Time:Specimens are sent to reference laboratory Mon-Sat; results are reported in 2-4 days.

This test was developed and its performance characteristics determined by ARUP Laboratories. The U.S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.

Collection Instructions

Specimen:Whole blood
Optimal Volume:3 mL
Minimum\Peds Volume:0.6 mL
Container:Purple (EDTA) (Green (sodium heparin, no gel))
Causes for Rejection:Non-frozen samples. Plasma separator tubes. Glass tubes. Clotted specimens.

Processing and Shipping

Specimen Processing:Do not centrifuge. Aliquot 3 mL, 0.6 mL minimum whole blood into an ARUP standard tube. Freeze whole blood within 4 hours. Critical Frozen. Separate specimens must be submitted when multiple tests are ordered.
Shipping Instructions:Ship on dry ice.
Stability:Stability: 4 hours refrigerated; 6 months frozen. Room temperature specimens are unacceptable.
Test Performed at or Referral Lab Lab Sendouts  (ARUP)
Referral Lab number:80388


Reference Range:70-180 nmol/L
Use:Approximately 80% of thiamine present in whole blood is found in red blood cells. The concentration of thiamine diphosphate (TDP), the primary active form of vitamin B1, is measured in this assay. Approximately 90% of vitamin B1 present in whole blood is TDP. Thiamine and thiamine monophosphate, which compromise the remaining 10%, are not measured.

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