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Micronutrient, Vitamin B6, Plasma
Test Code10193
CPT Codes
84207
Preferred Specimen
1 mL frozen plasma collected in an EDTA (lavender-top) tube - protected from light
Patient Preparation
Overnight fasting is required
Minimum Volume
0.5 mL
Other Acceptable Specimens
Foil wrapped transport tube protected from light
Instructions
Patients should be 18 years of age or greater.
Separate cells within 6 hours by centrifugation at 2-8° C (2200-2500 RPM, 800-1000 g) for 5-10 minutes. Transfer plasma to an amber polypropylene or polyethylene transport tube to protect from light. Alternately, neutral color polypropylene or polyethylene tube can be used if wrapped in aluminum foil. Freeze the tubes at -10 to -30° C. Ship frozen.
Separate cells within 6 hours by centrifugation at 2-8° C (2200-2500 RPM, 800-1000 g) for 5-10 minutes. Transfer plasma to an amber polypropylene or polyethylene transport tube to protect from light. Alternately, neutral color polypropylene or polyethylene tube can be used if wrapped in aluminum foil. Freeze the tubes at -10 to -30° C. Ship frozen.
Transport Container
Amber transport tube
Transport Temperature
Frozen
Specimen Stability
Room temperature: 72 hours
Refrigerated: 5 days
Frozen -20° C: 14 days
Frozen -70° C: 42 days
Refrigerated: 5 days
Frozen -20° C: 14 days
Frozen -70° C: 42 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis • Lipemia • Received room temperature • Received refrigerated
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 FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Setup Schedule
Set up: Sun-Fri; Report available: 1-4 days
Reference Range
| ≥18 years | 2.1-21.7 ng/mL |
Clinical Significance
Test is used to determine vitamin B6 deficiency or overdosage, for monitoring treatment, and to evaluate wellness and health.
