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Test #

502

Test CPT Codes

82136

Phenylketonuria (PKU) Amino Acids (Phenylalanine and Tyrosine only)

Test Type

Biochemical Genetics (Biochemical & Molecular 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

Storage, Stability & Shipping

Storage:

  • All specimen types should not be left at room temperature for more than 2 hours

  • All specimen types should not be frozen for more than 2 weeks

Stability:

  • Specimens are optimum when received as quickly as possible, due to amino acid lability

  • Samples outside of stability range include samples left at room temperature for more than 24 hours or frozen for more than 2 weeks

Shipping:

  • All specimen types must be shipped frozen with ice packs

Turnaround Time (TAT)

48-72 hours, priority given to critically ill patients and infants less than one year of age

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