We will place soft clips on your nose. The clips help you breathe out only through the tube attached to the spirometer.
You’ll then take a deep breath in and blow into a tube connected to the spirometer. The spirometer measures the amount of air you blow out of your lungs and the amount you inhale back into your lungs. Blow as hard and fast as you can.
You’ll repeat the test three times to ensure your results are accurate and reproducible.
Demo of the procedure in YouTube https://youtu.be/FfA1zawJjeA
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