Laboratory: Clinical Biochemistry  (SENDOUTS)
Test Name:
VITAMIN B1 (THIAMINE) - WHOLE BLOOD - (B)
Test Code: VIB1
Clinical Information:
Test indications:
This test is not to be used for general screening for thiamine deficiency.  It should only be requested on patients at risk of being thiamine deficient. This is the recommended test for assessment of body stores.

Patient Preparation: Fasting overnight (12-14 hours). Infants - Draw prior to next feeding. Water can be taken as needed. Cautions: Vitamin supplementation and nonfasting specimens may result in elevated thiamine diphosphate concentrations.
Collection Devices:
Preferred Device:
Alternate Device:
1 - EDTA 4 mL NO GEL Tube(s) - Full Tube Collection
Specimen Required:
Whole Blood: 2.0 mL
Pediatric Whole Blood: 2.0 mL

Collect a fasting specimen. Protect from light within 1 hour of collection and during storage and transport. Store and send frozen. If the specimen thaws it is unsuitable for analysis.
Referral:
Whole Blood: 2.0 mL

Keep specimen frozen, protect from light
Requisition:
Reference Values:
In-Common Laboratories Reference Values
http://www.hicl.on.ca/search_tcna.asp?TCString=VITB1%20WB
Availability:
Within 2 Weeks
See Also:
More Information:
Frozen Whole Blood, Protect from Light - If the specimen thaws it is unsuitable for analysis.