Test Details
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
Result Turnaround Time
7 - 10 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.
Use
Detect the presence of γ-hydroxybutyric acid (GHB), a central nervous system depressant
Specimen Requirements
Specimen
Serum or plasma
Volume
5 mL
Minimum Volume
1.2 mL
Container
Red-top tube or green-top (heparin) tube
Collection Instructions
Serum or plasma should be separated from cells within two hours of venipuncture. Submit serum or plasma in a plastic transport tube. Gel-barrier tubes are not recommended.
Storage Instructions
Submission/transport (<3 days): Room temperature. For storage beyond three days, specimen should be refrigerated or frozen.
Causes for Rejection
Gel-barrier tubes
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 738796 | GHB Screen, S/P | 59681-7 | 738795 | GHB | 59681-7 | |
| Order Code | 738796 | |||||
| Order Code Name | GHB Screen, S/P | |||||
| Order Loinc | 59681-7 | |||||
| Result Code | 738795 | |||||
| Result Code Name | GHB | |||||
| UofM | ||||||
| Result LOINC | 59681-7 |
| Order Code | Order Name | Result Code | Result Name | UofM | Result LOINC | |
|---|---|---|---|---|---|---|
| Reflex 1 | 738797 | Gamma-Hydroxybutyric Acid, CF | 738798 | GHB Confirmation | 81629-8 | |
| Reflex 1 | ||||||
| Order Code | 738797 | |||||
| Order Name | Gamma-Hydroxybutyric Acid, CF | |||||
| Result Code | 738798 | |||||
| Result Name | GHB Confirmation | |||||
| UofM | ||||||
| Result LOINC | 81629-8 | |||||
| Order Code | Order Name | Result Code | Result Name | UofM | Result LOINC | |
|---|---|---|---|---|---|---|
| Reflex 1 | 738797 | Gamma-Hydroxybutyric Acid, CF | 738799 | GHB | ug/mL | 43194-0 |
| Reflex 1 | ||||||
| Order Code | 738797 | |||||
| Order Name | Gamma-Hydroxybutyric Acid, CF | |||||
| Result Code | 738799 | |||||
| Result Name | GHB | |||||
| UofM | ug/mL | |||||
| Result LOINC | 43194-0 | |||||