Stage II is the predominant sleep stage during a normal night's sleep. The distinct and principal EEG criterion to establish stage II sleep is the appearance of sleep spindles or K complexes. The presence of sleep spindles is necessary and sufficient to define stage II sleep.
After 5 hours â your BAC would be 0.005. Alcohol would be eliminated from the body at about 5 hours and 20 minutes (the body metabolizes alcohol at the rate of about 0.005 per twenty minutes, as 0.005 x 3 = 0.015). So it is easy to tell when your body will be free of alcohol.
When it comes to urine tests, alcohol generally stays in urine for 12-36 hours, depending on how much was consumed, though some tests can detect the substance for up to 48 hours. The most advanced urine tests can detect a substance produced by the metabolization of alcohol for up to 80 hours after the last drink. Alcohol can also be detected on the breath for up to 24 hours after the last drink. Like most substances, alcohol can be detected in a personâs hair for around 90 days after the last consumption. It can also be detected via saliva swab, which can find traces of alcohol 10-24 hours later.