Phenylalanine Monitoring, Plasma
0080315
 
Ordering Recommendation
Use for monitoring patients with an established diagnosis of phenylketonuria (PKU).
Submit With Order
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 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


See Compliance Statement B: www.aruplab.com/CS
Note
This test is designed to monitor treatment and compliance in PKU patients.
CPT Code(s)
82131
Components
Component Test Code*Component Chart Name
0080315Phenylalanine, Plasma
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Cross References
  • Phenylalanine, Plasma
  • plasma phenylalanine