| Test Name: |
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Phencyclidine, Urine Screen
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| Test Code(s): |
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UPNL / HCUPNL
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| CPT Code(s): |
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See Drug Screen, Urine (Stat)
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| Test Description: |
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Included In: Drug Screen, Urine (Stat)
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| Methodology: |
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Enzyme Immunoassay
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| Days Performed: |
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Daily, 24 hours.
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| Turnaround Time: |
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Stat: 1 hour. All requests processed stat.
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Specimen Requirements
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| Specimen: |
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Random urine
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| Collection Instructions: |
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If confirmation by gas chromatography-mass spectrometry is requested on a specimen with a "screen positive" result, 10 mL of urine is needed for the confirmatory analysis.
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| Collection Container: |
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Preferred: Sterile screw cap container
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| Collection Volume: |
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Preferred: 25 mL
Pediatrics: 10 mL
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| Sample Analyzed: |
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Urine aliquot
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| Volume Required: |
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Preferred: 2 mL
Pediatrics: 0.5 mL
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| Specimen Processing: |
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Refrigerate specimen.
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| Specimen Transport: |
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Transport specimen to UWHC Core Laboratory (B4/220). Transport with coolant pack if coming from outreach location.
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| Stability: |
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Refrigerated: Up to 24 hours.
Frozen: Okay
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Interpretation
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Expected Results:
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Qualitative screening test. Results reported as "not detected" or "screen positive".
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| Test Limitations: |
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Dextramethorphan may cause false positive results. This is a screening test. Results are to be used for medical purposes only.
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| Additional Information: |
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A cut-off value of 25 ng/mL is used to determine whether phencyclidine (PCP) is "screen positive". If screening test is reported as "screen positive", confirmation and identification can be made (at additional charge) by a reference lab using gas chromatography - mass spectrometry . Please submit an add-on order within 7 days of collection if confirmatory testing is needed.
The half-life is approximately 11 hours but can vary from less than 1 hour to 7 days in chronic users. Phencyclidine is a drug of abuse, as well as being a legitimate veterinary tranquilizer.
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