Classification of asthma exacerbations

Use the job aid image for guidance, then enter the patient findings below. After all required information is provided, the final classification will be shown automatically.

Job aid reference

Classification of asthma exacerbations job aid

Clinical classification tool

Select the observed findings. The tool uses the highest severity identified among the selected findings.

Live summary

Fill in all fields above, then click Classify now to show the final asthma exacerbation classification.

Classification guide

Mild

Usually not agitated, able to talk in sentences, sits normally, SpO2 above 94%, and PEFR at least 70%.

Moderate

Talks in phrases, prefers sitting to lying down, SpO2 90-94%, reduced air entry, and PEFR at least 50% but below 70%.

Severe

Agitated, talks in words only, sits hunched forward, SpO2 below 90%, accessory muscle use, and PEFR 50% or less.

Life-threatening

Confusion or drowsiness, unable to talk, silent chest, poor respiratory effort, PEFR 33% or less, or bradycardia for age.