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Test Code TDP Thiamine (Vitamin B1), Whole Blood

Important Note

Use Sunquest code VITABS to order

Secondary ID


Method Name

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Specimen Type

Whole Blood EDTA

Shipping Instructions

Ship specimen in amber vial to protect from light.

Specimen Required

Patient Preparation: Fasting overnight (12-14 hours). Infants-draw prior to next feeding. Water can be taken as needed.

Supplies: Amber Frosted Tube, 5 mL (T192)

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.

UChicago Medicine Medical Laboratories Note:

Offsite Collection Instruction:


Protect from light after the draw.


Transfer whole blood into amber vial and freeze immediately. 

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
Other Glass vial Clotted specimen

Reference Values

70-180 nmol/L

Day(s) and Time(s) Performed

Monday through Friday

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information



If not ordering electronically, complete, print, and send a General Request (T239) with the specimen.