γ-Hydroxybutyric Acid (GHB), Screen and Confirmation, Urine

CPT: 80307
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Synonyms

  • Gamma-Hydroxybutyric Acid (GHB), Urine

Test Includes

Screen; confirmation of positive results


Expected Turnaround Time

7 - 10 days


Specimen Requirements


Specimen

Urine (random)


Volume

10 mL


Minimum Volume

1.2 mL


Container

Plastic urine container without preservative


Storage Instructions

Submission/transport (<3 days): Room temperature. For storage beyond three days, specimen should be refrigerated or frozen.


Causes for Rejection

Urine from preservative tube


Test Details


Use

Detect the presence of γ-hydroxybutyric acid (GHB), a central nervous system depressant


Methodology

Initial presumptive testing by chromatography/tandem mass spectrometry (LC/MS-MS) at a testing threshold of 10.0 µg/mL; presumptive positives confirmed by definitive chromatography/mass spectrometry (GC/MS) at a testing threshold of 10.0 µg/mL


LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
738792 GHB Screen, Urine 43197-3 738791 GHB 43197-3
Reflex Table for GHB
Order Code Order Name Result Code Result Name UofM Result LOINC
Reflex 1 738790 Gamma-Hydroxybutyric Acid,CF,U 738798 GHB Confirmation 81629-8
Reflex Table for GHB
Order Code Order Name Result Code Result Name UofM Result LOINC
Reflex 1 738790 Gamma-Hydroxybutyric Acid,CF,U 738794 GHB ug/mL 43198-1

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