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.
On an empty stomach, the average man absorbs 20% of the alcohol straight into his bloodstream. Experts estimate that the average man will break down alcohol at the rate of 0.015 BAC per hour. Thus, if your BAC is 0.030, it would take 2 hours to have all the alcohol leave your system. Some breathalyzers are faulty and will give you inaccurate readings due to body temperature, acid reflux or a bloody mouth. Natural compounds, like ketones can be mistaken for alcohol in the blood stream also.