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Test #
502
Test CPT Codes
82139, 84510
Phenylketonuria (PKU) Amino Acids (Phenylalanine and Tyrosine only)
Test Type
Biochemical Genetics
Test Disease / Components
Phenylketonuria (PKU)
Test Technology
High Pressure Liquid Chromatography (HPLC)
Clinical Utility
Diagnostic, Follow up
Test Specimen
Plasma
Requirements :
Fasting preferred
3 mL ; Minimum : 0.5 mL
Specimen Collection :
Sodium heparin (preferred)
Lithium heparin (acceptable)
Plasma should be separated within 2 hours of collection
Specimen Shipment and Storage:
Plasma should be shipped frozen (-15 to -25 °C)
Specimen should not be left at room temperature for more than 2 hours
Storage and Stability
Turnaround Time (TAT)
48-72 hours, priority given to critically ill patients and infants less than one year of age