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How do BAC Breath and Blood Tests are Conducted by San Antonio Authorities?

Aside from having your own San Antonio cheap car insurance, laws must also be followed responsibly. If you drink and drive your car in San Antonio city, you expose yourself to the risk of being accused of DWI and DUI laws violation. You might arrive in the situation to be stopped by a police officer who has the right to request you for a BAC test. You also have the right to refuse to undergo the test, but your driver’s license will be automatically suspended and you will have to face other multiple consequences too.

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The purpose of the BAC test is to detect the level of alcohol (ethanol) found in a human’s blood. The maximum limit accepted by San Antonio’s laws is the 0.08 percentage for adult drivers over 21 years old. For younger drivers, under 21, the maximum accepted percentage is 0.02% (according to the Texas’ ‘zero-tolerance’ law).

Here are a few things about alcohol: it is quickly absorbed by the blood (in just a few minutes). The alcohol level riches its highest level in an hour after drinking. This period of time may vary depending on the amount of the food existing in the human body.

There are two ways to perform a standard BAC test: the blood test and the breath test.

A first method would be the blood alcohol test. The steps needed to be performed are the following ones: an elastic band must be wrapped around the upper arm. Its purpose is to stop the flow of blood. The second step will be to clean the needle site with a non-alcoholic solution (you can use antiseptic soap or providone-iodine solution) then the needle will be inserted into the veins (which are now larger, because or the elastic band wrapped around the arm). All the needed amount of blood will be collected in a tube.  After this action is performed, the elastic band can be removed from the arm. A cotton ball will be pressed over the needle site and finally, a bandage will be placed at were previously inserted the needle.

Another simpler method used in order to detect the BAC level is the breath test: there is special equipment which must be properly calibrated in order to give accurate results. Unlike blood analyzer, the breath analyzer will approximately calculate the amount of alcohol found in one’s breath and not blood. The principles of this equipment are the following ones: the driver exhales into the breath analyzer. Instantly, any ethanol (alcohol) present in his breath is oxidized to acetic acid. If the atmospheric oxygen is reduced, the final reaction is represented by the oxidation of the ethanol to acetic acid and water. In the end, a microprocessor will measure the electrical current produced by this reaction and will display an approximated blood alcohol content level.

These are the two methods used by the San Antonio police officers in order to prove your DWI or DUI laws’ violations. The second method (the BAC breath test) if often used because it’s simpler and can be performed by any police officer. If a more complex analysis is needed, a BAC blood test will be requested. You can find more information on this topic and quotes for San Antonio cheap car insurance only by entering your zip code here.