Vitamin B6

Label Mnemonic:	VTB6
Epic code:	LAB120
Downtime form:	A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery

Commercial Mailout Laboratory
6240-8 RCP
356-8593

Specimen(s):

Plasma

Specimen Instructions:

Suggested: Collect the specimen after an overnight fast.

Collection Medium:

Light Green top tube (Lithium Heparin)

Minimum:

Preferred Minimum: 1 mL lithium plasma in an amber transport tube (transport tubes are located in Specimen Control)
Absolute Minimum: 0.5 mL lithium plasma in an amber transport tube

Rejection Criteria:

Whole blood. Specimens not protected from light. Icteric specimens.

Delivery Instructions:

Wrap specimen in aluminum foil to protect from light. Deliver to laboratory immediately after collection.

Turn Around Time:

2-5 days upon receipt in reference laboratory

Reference Range:

20-125 nmol/L

Interpretive Data:

Pyridoxal 5'-phosphate measured in a specimen collected following an 8 hour or overnight fast accurately indicates vitamin B6 nutritional status. Non-fasting specimen concentration reflects recent vitamin intake.

Note: The biologically active form of vitamin B6, pyridoxal 5- phosphate, is measured in this assay.

Methodology:

Quantitative High Performance Liquid Chromatography-Tandem Mass Spectrometry

CPT Code:

84207

See Additional Information:
Specimens Requiring Immediate Delivery