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HelpTest ID ETGSR Ethyl Glucuronide Screen with Reflex, Random, Urine
Specimen Required
Only orderable as part of profile. For more information see CSMEU / Controlled Substance Monitoring Enhanced Profile with Reflex, 21 Drug Classes, High Resolution Mass Spectrometry and Immunoassay Screen, Random, Urine.
Container/Tube: Plastic, 60-mL urine bottle
Specimen Volume: 5 mL
Collection Instructions:
1. Collect a random urine specimen.
2. No preservative.
Secondary ID
616033Useful For
Screening for drug abuse involving alcohol
Reflex Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| ETGC | Ethyl Glucuronide Confirmation, U | Yes | No |
Testing Algorithm
Testing begins with a screening assay. If the screen is positive, then the liquid chromatography-tandem mass spectrometry confirmation with quantification will be performed at an additional charge.
Method Name
Only orderable as part of profile. For more information see CSMEU / Controlled Substance Monitoring Enhanced Profile with Reflex, 21 Drug Classes, High Resolution Mass Spectrometry and Immunoassay Screen, Random, Urine.
Immunoassay
Reporting Name
Ethyl Glucuronide Scrn w/Reflex, USpecimen Type
UrineSpecimen Minimum Volume
2.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Refrigerated (preferred) | 28 days |
| Frozen | 28 days | |
| Ambient | 72 hours |
Clinical Information
This procedure uses immunoassay reagents designed to produce a negative result when no drugs are present in a natural (ie, unadulterated) urine specimen; the assay is designed to have a high true-negative rate. Like all immunoassays, it can have a false-positive rate due to cross-reactivity with natural chemicals and drugs other than those they were designed to detect. The immunoassay also has a false-negative rate to the antibody's ability to cross-react with different drugs in the class being screened.
Ethyl glucuronide is a direct metabolite of ethanol formed by enzymatic conjugation of ethanol with glucuronic acid. Alcohol in urine is normally detected for only a few hours, whereas ethyl glucuronide can be detected in the urine for 1 to 3 days.
Reference Values
Only orderable as part of profile. For more information see CSMEU / Controlled Substance Monitoring Enhanced Profile with Reflex, 21 Drug Classes, High Resolution Mass Spectrometry and Immunoassay Screen, Random, Urine.
Negative
Screening cutoff concentration:
Ethyl Glucuronide: 500 ng/mL
Cautions
Care should be taken when interpreting results since there are many factors (eg, fluid intake and other biologic factors) that may influence a urine test result. It is possible that substances other than those investigated in the specificity study may interfere with the test and cause false-positive or negative results.
Day(s) Performed
Monday through Saturday
Report Available
Same/1 to 2 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.CPT Code Information
80307