Home
HelpTest Code LAB745 Thiamine (Vitamin B1), Whole Blood
Useful For
Assessment of thiamine deficiency
Measuring thiamine levels in patients with behavioral changes, eye signs, gait disturbances, delirium, and encephalopathy; or in patients with questionable nutritional status, especially those who appear at risk and who also are being given insulin for hyperglycemia
Reporting Name
Thiamin (Vitamin B1), WBSpecimen Type
Whole Blood EDTAShipping Instructions
Ship specimen in amber vial or tube to protect from light.
Specimen Required
Patient Preparation:
1. Patient should fast overnight (12-14 hours); infants should have specimen collected just before next feeding. Water can be taken as needed.
2. For 12 hours before specimen collection, patient should not take vitamin supplements.
Supplies: Amber Frosted Tube, 5 mL (T915)
Collection Container/Tube: Lavender top (EDTA)
Submission Container/Tube: Amber vial
Specimen Volume: 4 mL
Collection Instructions:
1. Invert 8 to 10 times to mix blood.
2. Transfer whole blood into amber vial or tube and freeze within 24 hours of collection.
Specimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Whole Blood EDTA | Frozen | 28 days | LIGHT PROTECTED |
Reject Due To
| Gross lipemia | Reject |
| Glass vial Clotted specimen |
Reject |
Reference Values
70-180 nmol/L
Day(s) Performed
Monday through Friday
Report Available
3 to 6 daysSpecimen Retention Time
14 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
84425
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| TDP | Thiamin (Vitamin B1), WB | 32554-8 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 85753 | Thiamin (Vitamin B1), WB | 32554-8 |
Forms
If not ordering electronically, complete, print, and send a General Request (T239) with the specimen.