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Alcohol in a person's bloodstream passes through the lungs into a person's breath and can be detected using this test. It is very hard to fool!

It depends on the device. Brethalyzers measure electricity created by the presence of alcohol, while blood work uses laboratory testing procedures.

During respiration, blood in the lungs gets vaporized. It's the breath with the vaporized blood that gets measured for alcohol content.

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15y ago

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