Pyridoxal 5-Phosphate
Label Mnemonic: PYR5CSF
Epic Lab Code: LAB5828
Downtime Form: A-1a Miscellaneous Request
Commercial Mail-out Laboratory
5231 RCP
Cerebrospinal Fluid (CSF)
Specimen Instructions:
Call Specimen Control at 356-3527 or Commercial Mailouts at 356-8593 to obtain appropriate sample collection tubes. Each set consists of five numbered centrifuge tubes in a small plastic bag. Tube #3 contains antioxidants necessary to protect the sample from oxidation. One set of tubes is required per patient. The total CSF volume required is 3.5 mL.

CSF should be collected directly from the tap needle: Collect from the first drop in to the containers in the order indicated. Fill each tube to the marked line (0.5 mL in tubes 1, 2, 5 and 1.0 mL in tubes 3 and 4). Attach patient identifies to each tube without covering the tube number. If there is no blood contamination, place the tubes into a biohazard bag and place on ice (or dry ice if available) at the beside.
Collection Medium:
CSF Collection Tubes
Preferred Minimum: 1.0 mL CSF
Absolute Minimum: 0.5 mL CSF
Delivery Instructions:
Keep on ice and deliver to laboratory immediately.
Turn Around Time:
2 weeks upon receipt at reference laboratory
Reference Range:
0-2.5 years 30-80 nM 0.25-1 year 23-64 nM 1-4 years 18-50 nM 4-18 years 10-37 nM
Interpretive Data:
Marker for pyridox(am)in phosphate oxidase deficiency.
Please print, complete and submit to the lab, the Neurochemistry and Metabolic Test Request Form from MNG Laboratories, with the specimen and the A-1a Miscellaneous Request.
CPT Code: