Sign in →

Test Code 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

616033

Useful 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, U

Specimen Type

Urine

Specimen Minimum Volume

2.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated (preferred) 28 days
  Frozen  28 days
  Ambient  72 hours

Reject Due To

  All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

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

Interpretation

This assay only provides a preliminary analytical test result. A more specific alternative method (ie, liquid chromatography-tandem mass spectrometry) must be used to obtain a confirmed analytical result. A positive result using the ethyl glucuronide screen indicates only the potential presence of ethyl glucuronide and does not necessarily correlate with the extent of physiological and psychological effects.

CPT Code Information

80307

LOINC Code Information

Test ID Test Order Name Order LOINC Value
ETGSR Ethyl Glucuronide Scrn w/Reflex, U 58375-7

 

Result ID Test Result Name Result LOINC Value
616033 Ethyl Glucuronide Screen, U 58375-7