Thiamine (Vitamin B1), Whole Blood | KK Women's and Children's Hospital

Specimen Container	EDTA tube
Specimen Requirement	Fasting specimen Whole Blood EDTA 3 mL
Specimen Storage/Transport	Do not spin & aliquot. Protect EDTA tube from light by wrapping with aluminium foil. Send with ice pack and freeze within 24 hours of collection. Patient Preparation: Fasting: 12 hours, required; Infants should have specimen collected just before next feeding, water can be taken as needed For 12 hours before specimen collection, patient should not take vitamin supplements.
Orderable as Urgent?	No
Testing Laboratory Location	NUH
Laboratory	Mayo Medical Laboratories in Rochester
Contact Number	6394 1352
Day and Time Performed	Mon - Fri: 0800 hrs to 1700 hrs
Orderable on CPOE?	No
Downtime Form	Clinical Chemistry - Form A
Additional Information	Assessment of thiamine deficiency Thiamine measurement 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

Change History Notes

15 Sep 2025 12:30 PM

Update Specimen storage/transport and added Ice pack picture
13 Aug 2021 12:00 AM

Updated Contact Number.

Last Updated - 15 Sep 2025