Peak Expiratory Flow (PEF) rate in the _____ zone is between ____ and _____ %, and indicates that asthma is under good control
Green; 80, 100
PEF between ______ and _____ % is in the ______ zone and indicates caution. It may mean respiratory airways are narrowing and additional medication may be required.
50 - 79; Yellow
PEF below ________ indicates a medical emergency. Severe airway narrowing may be occurring and immediate action needs to be taken. This would usually involve contacting a doctor or hospital.