People with bronchiectasis and wheezing that responds to bronchodilator inhaler medicines should learn to use peak flow measurements.

The 3 peak flow (PEFR) zones are:

• PEFR <50% of personal best is the Red Zone. This indicates a severe attack and the need for more aggressive treatment.
• PEFR 50-80% of personal best is the Yellow Zone. It indicates suboptimal control or an early attack.
• PEFR 80-100% of personal best is the Green Zone. It indicates good control.