Diagnostics·Diagnostics
Peak flow test
Informed by recognized medical guidance
Overview
A peak flow test is a simple, quick breathing test that measures how fast you can blow air out of your lungs. It is often used to check how well your lungs are working, especially if you have asthma or another long-term lung condition.
Key facts
- The test uses a small, handheld device called a peak flow meter.
- You blow into the meter as hard and fast as you can, and it shows a number – your peak expiratory flow (PEF).
- Your personal best number is used as a target to help you and your doctor see if your breathing is getting better or worse.
Yes, peak flow testing is very common for people with asthma. Many people use a peak flow meter at home to monitor their lung function daily.
It mainly affects people with asthma, but it can also be used for those with chronic obstructive pulmonary disease (COPD) or other conditions that narrow the airways.