G-Hydroxybutyric acid, serum/plasma

Alphabetical Test listing

G-Hydroxybutyric acid, serum/plasma-1648

Test name:

Test number:

1648

Excellian order number:

LAB1648

Abbreviation:

GHB

Alternate names:

γ-hydroxybutyrate
Gamma-hydroxybutyric acid
Sedative/Hypnotic
Ser GHB

Tests included:

Screening
Confirmation (if appropriate)

Useful for:

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

Specimen type:

Serum

Collection container:

Red serum vial/tube, 10 mL

Volume:

5.0 mL

Minimum volume:

1.2 mL

Processing instructions:

Allow sample to clot
Spin within two (2) hours of sample collection
Transfer serum to a Serum/plasma transfer vial/tube (MedTox), labelled as serum

Transport container:

Serum/plasma transfer vial/tube (MedTox)

Alternate specimen type:

Heparin plasma

Alternate collection container:

Dk green heparin (Li or Na), no gel

Alternate collection instructions:

Immediately following collection, mix sample thoroughly by gentle inverting 8 - 10 times to prevent clotting

Alternate processing instructions:

Spin within two (2) hours of sample collection
Transfer plasma to a Serum/plasma transfer vial/tube (MedTox), labelled as the appropriate plasma type

Alternate transport container:

Serum/plasma transfer vial/tube (MedTox)

Transport and stability:

Refrigerated (preferred)

Ambient - 3 days

Frozen (OK)

Reason for rejection:

Gel-barrier tubes are not recommended

Performing lab:

MedTox Laboratories (19250): R-MX

Days set up:

Mo, We, Fr

TAT:

5 - 6 days

Method:

Screen: Liquid Chromatography with Tandem Mass Spectrometry (LC/MS/MS)

Confirmation: Gas Chromatography/Mass Spectrometry (GC/MS)

Reference ranges:

Negative

CPT codes:

80307
G0480 (if appropriate)

Subject to medical necessity (Y/N):

Yes

LCD/NCD:

Medical necessity

Date created:

10/02/2006

Revised date:

01/03/2024

Review date:

01/03/2024