Blood alcohol content
Blood alcohol content (BAC), also called blood alcohol concentration or blood alcohol level, is a measurement of alcohol intoxication used for legal or medical purposes.
| Blood alcohol content | |
|---|---|
| Synonyms | Blood alcohol concentration, blood ethanol concentration, blood alcohol level, blood alcohol |
| LOINC | 5639-0, 5640-8, 15120-9, 56478-1 |
BAC is expressed as mass of alcohol per volume of blood. In the US and many international publications, BAC levels are written as a percentage such as 0.08%, meaning that there is 0.08 g of alcohol for every 100 mL of blood. In different countries, the maximum permitted BAC when driving ranges from the limit of detection (zero tolerance) to 0.08%. BAC levels above 0.40% are potentially fatal.
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