Blood alcohol concentration (BAC) tests play a crucial role in determining if someone is driving under the influence (DUI). These tests measure the amount of alcohol in your blood. They provide more accurate results than field sobriety tests, which only suggest impairment. Here, we address some frequent questions about BAC tests.
1. How is BAC measured?
Law enforcement uses several methods to measure BAC. Yet, breath and blood tests are the most common. Police often use a Breathalyzer to analyze breath samples at the scene. Law enforcement usually reserves blood tests, which are considered more invasive, for serious cases.
2. How do breathalyzers work?
Breathalyzers measure the alcohol content in your breath. When you blow into the device, alcohol vapor in your breath reacts with a chemical inside. This reaction causes a color change, which a computer then translates into a BAC reading. For example, a reading might show a BAC of 0.08 percent, indicating legal intoxication in Washington.
3. Are breathalyzer tests accurate?
Breathalyzer tests are generally accurate but not infallible. Courts accept them as evidence, though they acknowledge some variance. Studies suggest that breath readings can differ by about 15% from blood test results. Factors like machine calibration, temperature, and even individual body chemistry can affect results. In some cases, courts have dismissed Breathalyzer evidence due to these inconsistencies.
4. Can you trick a breathalyzer?
Many myths suggest ways to beat a Breathalyzer, but none are effective. Common tactics include using breath mints, mouthwash, or even sucking on pennies. These do not lower BAC readings. In fact, mouthwash might increase your BAC because it often contains alcohol. The best way to ensure a low BAC is to avoid drinking and driving altogether.
5. Can you challenge Breathalyzer results in court?
Yes, challenging Breathalyzer results in court is possible. Technicians must regularly calibrate and maintain the devices. A skilled DUI attorney can examine the machine’s maintenance records to ensure it was functioning correctly. If there’s doubt about the device’s accuracy, the court might dismiss the results.
Understanding BAC tests can help you navigate legal challenges if faced with a DUI charge. Though Breathalyzers provide quick results, they are not foolproof. If you face DUI charges, consulting with a DUI attorney might be helpful. Remember, driving responsibly is the best way to avoid these situations.