Blood Alcohol Concentrations and Breath Alcohol Levels in a Los Angeles DUI Arrest

The results of the breath tests, blood tests or urine test will largely determine the charges brought and the possible sentences. The so-called "per se" offense (driving over .08%) is defined by the blood-alcohol level; the "DUI" offense (driving under the influence) is partially proven with a rebuttable presumption of intoxication if the result is over .08%.

It is important to realize that the DUI laws relate to the blood-alcohol level AT THE TIME OF DRIVING — not at the time of the test; there may be a significant difference, not to mention difficulties of proof. It is also important to understand that tests — particularly breath tests — are unreliable and susceptible to attack by an attorney who is knowledgable in the science of blood-alcohol analysis (PDF File).

Online Blood-Alcohol Calculator
A simple calculator to determine your theoretical blood-alcohol level with different amounts of alcohol consumed, from the manufacturers of the Intoximeter breath analyzing machine.

Why Breath Tests of Blood-Alcohol Don't Work (PDF File)
Article by Dr. Michael Hlastala, professor of pulmonary medicine at the University of Washington.

BAC Calculator
Online blood alcohol content calculator, factoring in age, gender, height, weight, elapsed time of drinking, number of drinks, type of drink and alcohol content of drink.

The Educator
Another online calculator for estimating blood alcohol concentration.

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