That said, not one test is 100% accurate all of the time.
Urine and breath tests estimate the blood-alcohol ratio, but their results correlate to those that would be generated from blood measurements. These tests work to detect the amount of alcohol remaining in your blood.īlood tests are often considered the most accurate because they directly measure the proportion of alcohol to blood. If you're arrested on suspicion of drunk driving, law enforcement officials may administer a blood, breath, or urine test to determine your BAC. It stays in your bloodstream and circulates throughout your body. But the liver can only digest about one standard drink per hour.Ī few examples of one standard drink include:Īny alcohol you consume over one standard drink per hour isn't immediately metabolized by the liver. When you, or any other person, drinks an alcoholic beverage, it's absorbed through the stomach and small intestine and processed by the liver. How Is BAC Measured?īefore discussing the types of tests used to measure BAC, let's first explore the science behind the numbers. 02% can start to affect your driving abilities. As you can see from the chart above, even a BAC of. Such can happen when alcohol has impaired your normal faculties and you're unable to safely operate your vehicle. Of course, you can also be charged with a DWI even if your BAC is under. 15 or above while you're driving, you could be charged with a Class A misdemeanor, a more severe crime. If you drive while at or above the legal limit, you may be charged with a Class B misdemeanor DWI. 08% or more, they are legally considered intoxicated. The higher the number, the more likely your judgment and motor abilities are affected.Īccording to the Centers for Disease Control and Prevention, the effects of alcohol by BAC are as follows: Generally, the BAC percentage coincides with the level of drunkenness. 10%, meaning that you have 1 part alcohol per 1,000 parts blood. A BAC test may reveal that you have an alcohol concentration of. It's a measurement of how much alcohol is in your bloodstream and is expressed as milligrams of alcohol per milligrams of blood. BAC stands for blood alcohol concentration.
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