•Status asthmaticus is an acute, prolonged, and severe asthmatic attack that is unresponsive to usual treatment. Hospitalization is usually required.
•Asthma is a chronic, obstructive airway disease characterized by wheezing. It is caused by a spasm of the bronchial tubes, or the swelling of the bronchial mucosa after exposure to various stimuli.
•Mild intermittent asthma is characterized by brief exacerbations occuring less than 3 times per week.
•Mild persistent asthma is characterized by exacerbations 3 or more times per week or 3-4 nighttime symptoms per month.
•Moderate persistent asthma is characterized by daily exacerbations and one or more nighttime exacerbations per weak.
•Severe persistent asthma is characterized by continual symptoms, frequent exacerbations and frequent nighttime symptoms.