Vitamin B1 (Thiamine)
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Vitamin B1 (Thiamine), Serum/Plasma
Test ID: VITB1QST
Test
Method
LC-MS/MS
Report Includes
Specimens
Plasma (EDTA); Serum
Clinical Utility
Vitamin B1 deficiency is most often associated with alcoholism, chronic illness and following gastric by-pass surgery. Prolonged deficiency causes beriberi. Plasma vitamin B1 is useful in evaluating nutritional assessment and compliance, while whole blood vitamin B1 is recommended for assessment of body stores (thiamine deficiency).
Test Location
Quest Diagnostics, California USA
Test Version
29-Aug-2022
Specimen
Specimens
Plasma (EDTA); Serum
Collection Containers
Lavender top (EDTA); Red top (no additive)
Sample Volume
2 mL
Minimum Volume
1 mL
Patient Preparation
Overnight fasting is required. Avoidance of vitamin supplements for 24 hours prior to collection is preferred.
Collection & Handling
Handling Information
Separate within 4 hours and transfer to amber vial to protect from light.
Freeze immediately. Store and send frozen.
Additional Information
Requisition must indicate Plasma.
Stability
| Ambient | 8 hours |
|---|---|
| Refrigerated | 48 hours |
| Frozen | 30 days |
Additional Stability Information
If the specimen thaws, it is unsuitable for analysis.
Rejection Criteria
| Specimen | Not frozen or not protected from light |
|---|
Test Version
29-Aug-2022
Performance / Interpretation
Method
LC-MS/MS
Turnaround Time
10 days
Results
| Name | Units | Reference Range | Conversion Factor | |
|---|---|---|---|---|
| Vitamin B1 (Thiamine) | nmol/L |
|
µg/dL x 29.6 | |
Test Location
Quest Diagnostics, California USA
Test Version
29-Aug-2022
Interface / Setup
HL7 Interface Codes
| Order Code | Result Codes | Units |
|---|---|---|
| VITB1QST | 62601Vitamin B1 (Thiamine), Serum/Plasma, LC/MS/MS | nmol/L |
Test Version
29-Aug-2022