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Test Directory

Test Directory Vitamin B1 (Thiamine), Blood, LC/MS/MS

Vitamin B1 (Thiamine), Blood, LC/MS/MS

Test Summary

Vitamin B1 is required for branched-chain amino acid and carbohydrate metabolism. Vitamin B1 deficiency is most often due to alcoholism or chronic illness. In the early stage, patients with vitamin B1 deficiency exhibit anorexia, irritability, apathy, and generalized weakness. Prolonged deficiency causes beriberi.

Aliases

Thiamine Whole Blood

Specimen Collection

Special Instructions

N/A

Preferred Specimen

2 mL Whole Blood collected in an EDTA (lavender-top) tube protected from light.

Minimum Volume

1 mL

Instructions

See Vitamin Collection Link

Patient Preparation

Overnight fasting is required.

Storage

Amber transport tube, light-protected

Transport Temperature

Frozen

Specimen Stability

Room temperature: 8 hours
Refrigerated: 5 days
Frozen: 35 days

Limitations

N/A

Other Acceptable Specimens

no other acceptable specimen types

Unacceptable Specimens

Received room temperature and not protected from light • Received refrigerated and not protected from light

Order Code

VITB1

EPIC (Premier) Code

LAB420

Includes

N/A

CPT Code

84425

Billing Code

670753

CPT Statement

Methodology

Chromatography/Mass Spectrometry

FDA Status

This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. The FDA has determined that such clearance or approval is not necessary. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Physician Attestation of Informed Consent

N/A

Testing Laboratory

Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly VA, 20153

Department

Reference Testing

Reference Range

78-185 nmol/L

Setup Schedule / Expected Turnaround Time

Monday - Saturday; Report available: 2 - 3 days

Resources

Vitamin Chart