What is the measurement unit used for Peak Flow?

Peak flow is measured in liters per minute. This measurement reflects how quickly a person can exhale air from their lungs, which is particularly useful in monitoring conditions like asthma. The peak flow meter quantifies the maximum speed of expiration, providing valuable data for both patients and healthcare providers to assess lung function and manage respiratory conditions effectively.

Using liters per minute allows for a standardized way to report and compare lung function across different individuals and situations, making it easier to track changes over time or in response to treatment. Other units such as milliliters/minute or centimeters/minute are not standard in this context, as they do not adequately represent the scale of human respiratory capacity in a way that is meaningful for clinical assessments.