Aperson with a blood alcohol content of 0.31% or higher is at risk of possible arrest because her lung function may be suppressed.

Respiratory arrest

Explanation:

Respiratory arrest is a condition in a person during which the person with the respiratory arrest feels ineffective breathing or stops breathing.

Most of the times the Respiratory arrest occurs along with the cardiac arrest, but it may be the case always.

Some of the causes of respiratory arrest are

Obstruction in getting enough oxygen into the lungs.

Infection.

Alcohol or Drug abuse

Chemical inhalation.

Respiratory

Explanation:

A person with a blood alcohol content of 0.31% or higher is at a risk of possible respiratory  arrest because her lung function may be suppressed.