Test ID: PLP
Pyridoxal 5-Phosphate (PLP), Plasma
Specimen Type 
Describes the specimen type needed for testing
Plasma Heparin
Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.
Collection Container/Tube: Green top (heparin)
Submission Container/Tube: Amber vial (Supply T192)
Specimen Volume: 1 mL
Collection Instructions:
1. Fasting-overnight (12-14 hours) (infants-draw prior to next feeding).
2. Patient must not ingest vitamin supplements for 24 hours before the specimen is drawn.
3. Centrifuge at 4 degrees C, then aliquot all plasma into amber vial to protect from light.
Specimen Minimum Volume Defines the amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.
0.5 mL
Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected
| Hemolysis | Mild OK; Gross OK |
| Lipemia | Mild OK; Gross OK |
| Icterus | Mild OK; Gross OK |
| Other | Plasma gel tube |
Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.
| Specimen Type | Temperature | Time |
|---|---|---|
| Plasma Heparin | Refrigerated (preferred) | 7 days |
| Frozen | 14 days |
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