Measuring Lung Function with a Peak Flow Meter
The video shows how to measure a child’s lung function using a peak flow meter. We measure the speed of airflow into and out of the lungs.
This video shows how to use a peak flow meter, which measures the amount of air coming out of the lungs when someone breathes very hard. The marker on the scale is set to zero. The child takes a deep breath, holds it, and then blows as quickly and strongly into the device as possible. The air forced out of the lungs will move a marker up a scale on the meter. Record that number on the meter. Repeat this three times and note the highest number, which represents how much air the child was able to blow out. The video shows the use of different types of peak flow meters. A child with asthma should use the peak flow meter regularly to keep track of their asthma symptoms. Peak flows are more sensitive than symptoms in assessing how a child is doing with asthma.