Commercial Mail-out Laboratory
|Green top tube 4 mL (Na Heparin)
Preferred Minimum: 3 mL whole blood from green top (NA Heparin)
Absolute Minimum: 0.6 mL whole blood from green top (NA Heparin)
Any specimen other than whole blood. Plasma separator tubes. Glass
tubes. Clotted or non-frozen specimens.
Deliver to laboratory immediately after collection. Critical frozen. Separate specimens must be submitted when multiple tests are
2-4 days upon receipt at reference laboratory
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
Whole blood is the preferred specimen for thiamine assessment.
Approximately 80 percent of thiamine present in whole blood is found
in red blood cells.
Do not use to monitor thiamine supplementation. Use to determine
Quantitative High Performance Liquid Chromatography