Breath alcohol concentration (BAC) is a medical term that indicates the amount of alcohol in a person's breath. BAC is usually expressed in milligrams per liter of breath and serves as an indicator of a person's alcohol consumption.
The AAC can be determined by a breathalyzer test, in which the person blows into a device that measures the alcohol content (ethanol) in the breath. The AAC depends on various factors, such as Amount of alcohol consumed, the person's body weight and gender.
The AAK plays an important role in the context of Medical-Psychological Examination (MPU) and other traffic offenses involving alcohol. Many countries have legal limits for the permissible blood alcohol level in traffic, exceeding which can result in consequences such as driver's license suspension or fines.
It is important to note that AAC alone is not a reliable indicator of a person's alcohol consumption; other factors such as individual alcohol tolerance or the timing of consumption may also play a role. The assessment of alcohol consumption should therefore always be performed by a qualified physician or medical examiner who considers AAC in conjunction with other factors and indicators.
The road traffic regulations define an AAK of 0,25 milligrams per liter of breath as an administrative offence, as is 0,5 per mille blood alcohol concentration (see BAK). The given values therefore correspond approximately to each other. According to § 24a StVG, the Determination of the AAC is carried out using a device certified for this purpose, so measuring the BAC is not necessary.
