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 Patient Preparation: 1. Fasting: 12 hours, required; 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.
Specimen Storage/Transport	Do not spin & aliquot. Protect EDTA tube from light by wrapping with aluminium foil. Send specimen with ice pack to the laboratory. Transfer whole blood into amber vial to protect from light Freeze whole blood immediately before the next transport available.
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

02 Sep 2026 02:59 PM

Updated Specimen Requirement & Specimen Storage/Transport.
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 - 02 Sep 2026