Phenylalanine Monitoring, Plasma
0080315
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.
Submit With Order
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 February 18, 2014
| 0-30 days | 30 - 100 µmol/L |
| 1 month - 11 months | 30 - 90 µmol/L |
| 1 year and older | 30 - 80 µmol/L |
Interpretive Data
Compliance Statement B: This test was developed and its performance characteristics determined by ARUP Laboratories. The U.S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.
Note
This test is designed to monitor treatment and compliance in PKU patients.
CPT Code(s)
82131
Components
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 0080315 | Phenylalanine, Plasma | 14875-9 |
Aliases
- Phenylalanine, Plasma
- plasma phenylalanine