Peak expiratory flow rate

Question 1

Give the steps for using a PEFR

Answer 1

Insert the mouthpiece into the meter, if not already fitted.
Ensure the pointer is set at Zero (l/min position)
Hold the Peak Flow Meter so that your fingers are clear of the scale and slot, and do not obstruct the holes at the end of the Peak Flow Meter.
Stand up and take a deep breath.
Place the Peak Flow Meter in the mouth and hold it horizontally, closing the lips around the mouthpiece.
Now blow as hard and as fast as you can.
Note the number on the scale indicated by the pointer.
Return the pointer to zero and repeat the procedure twice more to obtain three readings.
Mark the highest reading on the peak expiratory flow chart.

Question 2

Give reversible causes of decreased PEFR

Answer 2

Asthma

Question 3

Give irreversible causes of decreased PEFR

Answer 3

COPD
Chronic bronchitis
Restrictive lung disease