Gamma-Hydroxybutyric Acid (GHB), Screen with Confirmation (Mass Spectrometry), Whole Blood

TEST: 738802
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CPT: 80307
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Synonyms

  • GHB

Expected Turnaround Time

7 - 14 days

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Specimen Requirements

Specimen

Whole blood

Volume

5 mL

Minimum Volume

1.2 mL

Container

Gray-top (NaF/oxalate) tube, green-top (heparin) tube, or lavender-top (EDTA) tube

Storage Instructions

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

Test Details

Use

Detect use of gamma-hydroxybutyric acid (GHB), a psychoactive drug

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
738802 GHB Screen, WB 77733-4 738803 GHB 77733-4
Reflex Table for GHB
Order Code Order Name Result Code Result Name UofM Result LOINC
Reflex 1 738804 GHB, CF, WB 738798 GHB Confirmation 81629-8
Reflex Table for GHB
Order Code Order Name Result Code Result Name UofM Result LOINC
Reflex 1 738804 GHB, CF, WB 738805 GHB ug/mL 28038-8

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