Breath alcohol test

Alternative names:

alcohol test - breath

How the test is performed:

The test can be performed after waiting at least 15 minutes since the last drink of an alcoholic beverage (at least 1 minute after smoking).

Inflate the balloon enclosed with the test in one continuous breath until it is full. Attach the balloon mouthpiece to one end of the glass tube. The tube is filled with bands of yellow crystals. Release the air slowly through the tube for 1 minute. Then count the bands in the tube that have changed from yellow to green. If an electronic alcohol meter is used, follow the instructions that come with the meter.

How to prepare for the test:

Wait 15 minutes after drinking an alcoholic beverage and 1 minute after smoking before starting the test.

How the test will feel:

There is no discomfort.

Why the test is performed:

After consuming a drink containing alcohol, the blood-alcohol concentration rises. When the percent of alcohol in the bloodstream reaches .02 to .03%, you may feel a relaxing "high." When the percentage of alcohol reaches .05 to .10% you have reduced muscular coordination, a longer reaction time, and impaired judgment. Driving is hazardous at these levels. A person with alcohol levels of 0.1% and above is considered legally drunk in most states (some states have lower levels than others). The alcohol content of exhaled air accurately reflects the alcohol content of the blood.

The test helps you to know how much alcohol it takes to raise the blood-alcohol level to a dangerous level. Each person's response to alcohol varies. The test may help you make better decisions about driving after drinking.