Breath tests play an important role in determining whether someone is driving under the influence (DUI). However, these tests are not foolproof. Understanding how this happens is essential for anyone facing DUI charges or concerned about the reliability of breath tests.
Medical conditions and results
Certain medical conditions, such as acid reflux, diabetes, and lung disease, can significantly affect the outcome of a breath test. For instance, acid reflux can cause alcohol from the stomach to rise into the mouth, leading to an artificially high blood alcohol level. Similarly, diabetics may produce acetone, a substance that a breath test device might mistake for alcohol. Lung diseases can also alter the amount of air expelled, which may affect the test’s accuracy.
Additionally, some prescription medications can influence breath test results, either by interacting with the body’s metabolism of alcohol or by directly affecting breath composition. This adds another layer of complexity for individuals who regularly take medication and may lead to questions about the validity of the results.
Legal challenges to breath tests
Defendants can challenge breath test results for a DUI defense if a medical condition may have skewed the outcome. The state’s Rules of Evidence allow for the introduction of medical records or expert testimony to argue inaccuracies.
Court cases such as Commonwealth v. Schildt recognize that breath tests are unreliable, particularly when health issues are a factor. While the state’s implied consent law requires drivers to submit to testing, it also permits challenges if a medical condition may have affected the results.
Final thoughts
Breath tests are commonly used in DUI cases, but various factors can affect their accuracy. Understanding the potential for inaccuracies is important to ensure each case is handled fairly.