Vitamin B1 VB1

Synonyms

Allscripts (AEHR) Order Name

Vitamin B1, Whole Blood

Sunrise Clinical Manager (SCM) Order Name

Vitamin B1, Serum

Clinical Info

For the assessment of thiamine deficiency

Specimen Type

Blood

Container

Lavender Top Tube

Collection Instructions

Container/Tube: Lavender-top (EDTA) tube Specimen Volume: 1mL (minimum volume: 0.5mL) of whole blood.  
Transport Temperature: Frozen whole blood
 
Collection Instructions:
Blood samples should be collected before breakfast in the morning and prior to any medication.
 
Draw blood. Do not separate. Transfer to a plastic transport tube. Freeze
 
Stability:  14 days Frozen

Transport Instructions

Frozen whole blood

Specimen Stability

14 days Frozen

Methodology

Liquid chromatography/tandem mass spectrometry (LC/MS-MS)

Days Performed

Monday through Friday

Performing Laboratory

LabCorp of America

CPT

84425
 
LOINC:  32554-8

PDM

5901345

Result Interpretation

66.5-200.0 nmol/L
 
The biologically active form of the vitamin, thiamine pyrophosphate (TPP), is best measured in whole blood and is not found in measurable concentration in plasma. Plasma thiamine concentration reflects recent intake rather than body stores; therefore, whole blood is the preferred specimen for thiamine assessment. Approximately 80% of thiamine present in whole blood is found in red blood cells.
 
This test was developed, and its performance characteristics determined, by LabCorp. It has not been cleared or approved by the US Food and Drug Administration (FDA).

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