Vitamin B1, Whole Blood
Also known as: B1 Vitamin, Whole Blood, Thiamine, Whole Blood
Use
For the assessment of thiamine deficiency
Special Instructions
Whole blood is the preferred specimen as TPP accounts for 90% of thiamine content. Samples should be collected before breakfast and before any medication. Use a lavender-top (EDTA) tube and ensure samples remain frozen to avoid turnaround delays.
Limitations
The test measures the biologically active form, thiamine pyrophosphate (TPP), which is not found in significant concentrations in plasma. Plasma concentration reflects recent dietary intake rather than body stores, affirming whole blood as a superior specimen for assessing thiamine status.
Methodology
Mass Spectrometry
Biomarkers
LOINC Codes
- 32554-8
- 32554-8
Result Turnaround Time
4-6 days
Related Documents
For more information, please review the documents below
Specimen
Whole Blood
Volume
1 mL
Minimum Volume
0.5 mL
Container
Lavender-top (EDTA) tube
Collection Instructions
Draw blood. Do not separate. Transfer to a plastic transport tube. Freeze.
Patient Preparation
Collect blood samples before breakfast and prior to any medication.
Storage Instructions
Freeze
Causes for Rejection
Use of anticoagulants other than EDTA
Stability Requirements
| Temperature | Period |
|---|---|
| Frozen | 14 days |