Breath Test Defense


If you have recently been arrested for driving under the influence, you may feel that all hope is lost. This is not the case. There are many defense tactics that your attorney can use to have these serious charges against you dropped.

One of the most common defenses that an attorney will use is the breath test defense. Most people seem to think that breath testing is an accurate way to determine a person’s blood alcohol content (BAC) level. However, this belief is untrue. There are often errors with breath testing, which can show false readings that are significantly higher than the driver’s true BAC. The variables that can lead to these errors are not taken into account by the breath testing device.

One problem with the breath machine is that it assumes that there is a direct relationship between the amount of alcohol in a driver’s air sample and the amount of alcohol in the driver’s blood. In the United States, this standard ratio is 2100 to 1, which means that the amount of alcohol in one milliliter of blood is 2100 times greater than the amount of alcohol found in a cubic centimeter of an air sample. Because of this, all breath machines are calibrated based on this 2100 to 1 assumption. However, not all people have this breath to blood ratio. If a driver has a ratio lower than this, his or her breath test result will be artificially high.

There are several health-related factors that can affect a breath test. If you have gastric reflux, a hiatal hernia, or intestinal problems, you may not be a good candidate for breath testing, as these conditions may cause errors on the test. Dental and respiratory conditions also adversely affect the results.

Vomiting or belching before a test will inflate the test results.

The temperature of the driver’s breath sample is extremely important. If the temperature is 1 degree above 34 C, this can inflate the driver’s BAC reading by as much as 7 percent.

Remember those high protein diets? If you have been on a diet like that and began eating carbs, it triggers alcohol production when the ketones are converted into isopropyl alcohol. This will affect your breath test results.

If you believe that any of these factors may have lead to an inflated breath test result, you should immediately contact DUI defense attorney.





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