Phenylalanine Monitoring, Plasma

0080315
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Example Reports
Abnormal
Normal

Ordering Recommendation

Use for monitoring patients with an established diagnosis of phenylketonuria (PKU).

Mnemonic

QNTPHE

Methodology

Quantitative Liquid Chromatography/Tandem Mass Spectrometry

Performed

Mon-Fri

Reported

2-5 days

New York DOH Approval Status

This test is New York DOH approved.

Specimen Required

Patient Preparation
Collect

Green (sodium or lithium heparin).

Specimen Preparation

Separate plasma from cells ASAP or within 2 hours of collection. Transfer 0.5 mL plasma to an ARUP Standard Transport Tube. (Min: 0.25 mL)

Storage/Transport Temperature

Frozen.

Unacceptable Conditions

Hemolyzed specimens.

Remarks
Stability

After separation from cells: Ambient: Unacceptable; Refrigerated: 24 hours; Frozen: 1 month

Reference Interval

Effective November 18, 2019

Age Reference Interval
0-30 days 30-95 µmol/L
1 month - 11 months 30-90 µmol/L
1 year and older 30-82 µmol/L

Interpretive Data

This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.

Compliance Category

Laboratory Developed Test (LDT)

Note

This test is designed to monitor treatment and compliance in PKU patients.

Hotline History

N/A

CPT Codes

82131

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Components

Component Test Code* Component Chart Name LOINC
0080315 Phenylalanine, Plasma 14875-9
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • Phenylalanine, Plasma
  • plasma phenylalanine
Phenylalanine Monitoring, Plasma