Casandra
Casandra Test Code AR89139Version 1 (DRAFT)
Performing Lab
Phenylalanine Monitoring, Plasma (Change effective as of 07/21/25: Refer to 0080336)
Also known as: QNTPHE
Clinical Use
Order TestUse
This test is used for monitoring phenylalanine levels in plasma, typically for patients with known phenylketonuria (PKU) under treatment or dietary management.
Special Instructions
Not provided.
Limitations
Not provided.
Test Details
New York Approved
Methodology
Mass Spectrometry
Biomarkers
Phenylalanine
AnalytePhenylalanine • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Result Turnaround Time
2-5 days
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Plasma
Volume
0.5 mL
Minimum Volume
0.25 mL
Container
Green (sodium or lithium heparin)
Causes for Rejection
Hemolyzed specimens.
Stability Requirements
| Temperature | Period |
|---|---|
| Refrigerated | 24 hours |
| Frozen | 1 month |
Related Tests
Other tests from different labs that may be relevant
Phenylalanine, Quantitative, Plasma
Labcorp
Phenylalanine and Tyrosine, Plasma
Mayo Clinic Lab
Phenylalanine and Tyrosine
Quest Diagnostics
Tyrosine
Quest Diagnostics
Phenylbutyrate Metabolite Analysis - Plasma
Baylor Genetics
Amino Acid Analysis, Limited, Plasma
Quest Diagnostics
Amino Acids, Quantitative, Plasma
Mayo Clinic Lab
Amino Acid Profile, Quantitative, Plasma
Labcorp
Amino Acid Analysis for MSUD, Plasma
Quest Diagnostics
Perphenazine, Serum or Plasma
Labcorp