Articles tagged: Inappropriate Subjects for Breath Testing 

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Inappropriate Subjects for Breath Testing written by Darren Kavinoky
Although breath testing is widely used to measure blood alcohol content (BAC), it is not appropriate for all people. Breath testing measures the amount of alcohol that is evaporated from the alveolar tissue in the lungs. Breath is expelled from the deepest portion of the lungs, passes through the throat, and then exits from the mouth. However, where residual alcohol is retained in the mouth, the resulting BAC reading will reflect mouth alcohol and not deep lung air.

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