Degradation of EtG may occur over time if a urine sample is not stored properly. EtG is subject to bacterial degradation if the urine specimen is stored at room temperature for too long after collection. When degradation occurs, the amount of EtG in the urine decreases over time. In these cases, a sample that may have initially been positive may have significantly lower EtG levels if it is reanalyzed at a later date. Published scientific literature has shown EtS to be more stable than EtG at room temperature.
Due to the inherent instability of EtG in urine specimens at room temperature, Cordant Health Solutions recommends that specimens intended for EtG testing be refrigerated if they cannot be shipped to the proper laboratory within three days.
Detection time of EtG in urine : days after the last alcohol intake. This test is made to highlight a recent alcohol consumption, but cannot indicate in any case a state of alcoholic intoxication it doesn't indicate if the patient is drunk or not. Therefore, it should never be used for road safety or occupational safety. The test is immersed directly into the urine sample, which prevents any liquid handling. So, what is an EtG test? Glad you asked. Simply put, an EtG test is a test that can determine if someone has had alcohol in their body.
It might be kind of confusing though, because an EtG test does not test for alcohol itself. EtG stands for ethyl glucuronide, which is a substance produced in the liver when your body processes alcohol. The EtG test is actually testing for this substance using small strips that are either dipped in urine, or have small droplets of urine dropped onto them. Timelines for how long your system will show signs of EtG are different depending on who you ask.
Some studies show EtG is detectible from 24 to hours after the alcohol is processed, but others say between 24 and 72 hours, all depending on the amount of alcohol that entered your body. Another factor is the differences in our bodies.
Even further , the level of urine stored in your bladder can have an effect on how much EtG is detectible. You would be required to give a urine sample, usually in one of those little plastic containers with a lid.
The person doing the test would then utilize a kit containing one or more strips that have different colored squares on them, although not all test kits are like this. The EtG test is sensitive enough they can detect EtG resulting even from a small amount of alcohol entering your body. They quickly became the go-to test in situations where abstinence from alcohol was being watched.
Since the EtG test is so sensitive it has to be used with caution and the full knowledge, both from the tester and the person receiving the test, that false positives are possible. One way this is particularly difficult to deal with right now is the prevalence of hand sanitizer.
This is only a partial list. In truth there are many, even hundreds of every-day products that contain ethanol and which can trigger an EtG test to produce a positive result. The EtG test is most reliably used in confirming that a person has not consumed alcohol or any alcohol-containing products in the days prior to the test.
A positive EtG test usually confirms a person was exposed to ethanol within the days leading up to the urinalysis. Even with this as its goal, the test will only accurately detect ethanol in a person who recently consumed alcohol 70 percent or more of the time. One study showed that for moderate to heavy drinking, this number jumps to 85 percent. A negative EtG test shows that a person was not exposed to ethanol within the testing time frame up to five days.
These amounts of EtG can be associated with:. In addition to ethanol exposure through the consumer products mentioned earlier, there are some situations where a person may have a positive EtG test without consuming a product with ethanol.
For instance, if a person's urine sample is not stored properly and remains too long at room temperature, EtG levels can rise due to bacteria growth in the sample. Refrigeration of samples is suggested for any EtG test that cannot be shipped within the recommended time frame. Also, a patient with diabetes who has a urinary tract infection may produce EtG, which can result in a positive test. This situation can only occur in an individual who has diabetes.
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