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VITAMIN B6 (PYRIDOXAL 5-PHOSPHATE)

Mnemonic

VIT B6

Specimen Collection Requirements

Patient Preparation

Collect the specimen after an overnight fast.

Collect

Plasma, one 6 mL green (sodium or lithium heparin) or plasma separator tube, also acceptable: Serum in plain red top tube

Handling

CRITICAL FROZEN. PROTECT FROM LIGHT within one hour of collection, during storage and shipment. Separate plasma from cells and freeze ASAP. Separate specimens must be submitted when multiple tests are ordered.

Preferred Volume

1.0 mL

Minimum Volume

0.5 mL

Transport

Frozen

Rejection Criteria

Nonfrozen specimens, EDTA preserved specimens, whole blood

Stability

Ambient: Unacceptable; Refrigerated: 3 days; Frozen: 2 months

Testing Information

Note

Specimens collected in EDTA yield a higher pyridoxal 5'-phosphate concentration, therefore EDTA is not acceptable.

Performed

7 days/week

Reported

2-6 days

Method

High Performance Liquid Chromatography

Referral Lab

ARUP (0080111)

Reference Values

Reference Values

Interpretation provided.

CPT Codes

84207

Last Updated: Friday, September 29, 2017 08:17:59 AM


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