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HelpThiamine (Vitamin B1), Whole Blood
Additional Codes
LAB745
Specimen Type
Whole Blood EDTAShipping Instructions
Ship specimen in amber vial or tube to protect from light.
Specimen Required
Patient Preparation:
1. Fasting: 12 hours, required; Infants should have specimen collected 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 whole 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 |
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.