ARUP's Laboratory Test Directory
| 0080388: Vitamin B1 (Thiamine), Whole Blood |
| Test Mnemonic: VIT B1 WB | |
|
Methodology: High Performance Liquid Chromatography
Performed: Sun-Sat Reported: 2-6 days |
| Specimen Required: | |
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Collect: One 4 mL green (sodium or lithium heparin) or one 5 mL lavender (EDTA) or pink (K2 EDTA).
Transport: 3 mL whole blood, frozen. (Min: 1 mL) Submit specimen in an ARUP Amber Transport Tube. Pediatric Collection/Transport: 0.7 mL whole blood, frozen. Remarks: CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered. Protect from light during collection, storage, and shipment. Unacceptable Conditions: Nonfrozen specimens. Glass tubes. Stability: Ambient: Unacceptable; Refrigerated: 4 hours; Frozen: 6 months |
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| Reference Interval: |
| 70-180 nmol/L |
| Interpretive Data: | |
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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 comprise the remaining 10%, are not measured.
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| Note: | |
| Whole blood is the preferred specimen for thiamine assessment. Approximately 80% of thiamine present in whole blood is found in red blood cells. |
| CPT Code(s): | |
| 84425 |