What does a PEF reading of 80-100% of personal best indicate in asthma management?

A peak expiratory flow (PEF) reading between 80-100% of an individual's personal best indicates that asthma is well-controlled, corresponding to the green zone of asthma action plans. This range suggests that the individual is effectively managing their asthma, with minimal risk of experiencing an exacerbation. In this zone, the person can typically continue with their regular activities and is likely not experiencing significant respiratory issues.

The green zone is characterized by good lung function, indicating that the medications or management strategies being utilized are effective. This information is crucial for both patients and healthcare providers as it helps to confirm that the patient's asthma action plan is successful and that ongoing treatment can be maintained without adjustments.

In contrast, readings that fall into the yellow or red zones would indicate worsening respiratory function, requiring careful monitoring and potential changes in treatment. The yellow zone indicates caution and suggests that the individual may need to use rescue medications, while the red zone represents a medical alert condition that necessitates immediate medical attention. The danger zone, while not formally used in most asthma action plans, implies a severe exacerbation that could pose serious health risks.

Understanding these zones and the significance of the PEF readings aids in effective asthma management and helps prevent potential complications.