What it means
Also called blood alcohol concentration (BAC). It is checked after injuries, in unexplained confusion or coma, and in poisoning. In most US states the legal limit for driving is 0.08% (80 mg/dL). Higher levels slow breathing and thinking more and more, and very high levels can cause coma and death. People who drink heavily over time may seem less affected at a given level.
For the nurse
Interpret the level together with the client's behavior and breathing. A falling level with ongoing confusion needs another cause looked for, such as a head injury or low blood glucose. Watch heavy drinkers for alcohol withdrawal as the level falls.
At a glance
| Normal range | None detected (0). |
|---|---|
| Also written | blood alcohol concentration, BAC |
Related terms
toxicology screen
A urine or blood test that checks for drugs, alcohol or poisons in the body.
Wernicke encephalopathy
A sudden, serious brain disorder that results from a severe lack of thiamine (vitamin B1).