Vitamin B1
Label Mnemonic: | VTB1B |
Epic code: | LAB125 |
Downtime form: | A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery |
Commercial Mailout Laboratory
6240-8 RCP
356-8593
6240-8 RCP
356-8593
Specimen(s):
Whole Blood
Collection Medium:
Green top tube 4 mL (Na Heparin) |
Minimum:
Preferred Minimum: 3 mL whole blood from green top (NA Heparin)
tube.
Absolute Minimum: 0.6 mL whole blood from green top (NA Heparin) tube.
Absolute Minimum: 0.6 mL whole blood from green top (NA Heparin) tube.
Rejection Criteria:
Any specimen other than whole blood. Plasma separator tubes. Glass
tubes. Clotted or non-frozen specimens.
Delivery Instructions:
After collection, place in wet ice and immediately deliver to laboratory. Critical Frozen. Specimen is not stable at room temperature. Only stable for 4 hours refrigerated. Separate specimens must be submitted when multiple tests are ordered.
Turn Around
Time:
2-4 days upon receipt at reference laboratory
Reference Range:
70-180 nmol/L
Interpretive Data:
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.
Comments:
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 thiamine deficiency.
Do not use to monitor thiamine supplementation. Use to determine thiamine deficiency.
Methodology:
Quantitative High Performance Liquid Chromatography
CPT Code:
84425
See Additional Information:
Specimens Requiring Immediate Delivery
Specimens Requiring Immediate Delivery