Use for nutritional assessment of vitamin B1 (thiamine).
Quantitative High Performance Liquid Chromatography
Green (Sodium or Lithium Heparin), Lavender (EDTA), or Pink (K2EDTA).
Transfer 3 mL whole blood to an ARUP Standard Transport Tube. (Min: 0.6 mL)
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
Any specimen other than whole blood. Plasma separator tubes. Glass tubes. Clotted or non-frozen specimens.
Ambient: Unacceptable; Refrigerated: 4 hours; Frozen: 6 months
This assay measures the concentration of thiamine diphosphate (TDP), the primary active form of vitamin B1. Approximately 90 percent of vitamin B1 present in whole blood is TDP. Thiamine and thiamine monophosphate, which comprise the remaining 10 percent, are not measured.
Laboratory Developed Test (LDT)
Whole blood is the preferred specimen for thiamine assessment. Approximately 80 percent of thiamine present in whole blood is found in red blood cells.
|Component Test Code*||Component Chart Name||LOINC|
|0080388||Vitamin B1, Whole Blood||74444-1|
- B1 Vitamin
- Thiamin Pyrophosphate
- Thiamine Diphosphate