- This is another type of PFT
- Very simple and cheap, can be done at home using a peak flow meter
- It shows how quickly and forcefully you can blow out air, after a deep inhalation
PEAK FLOW METER
PEFR
- Very helpful in tracking the severity of asthma and response to treatment.
- Should not be used to diagnose asthma
- Technique:
- Breathe in as deep as you can.
- Then, blow forcefully into the mouthpiece
- as hard & fast as you can