Why Should All Values from a Series of Peak Flow

Question

Why should all values from a series of peak flow measurements be reported?
A) PEF may decrease with repeated efforts.
B) A minimum of three values must be averaged.
C) Peak flowmeters do not need to be precise.
D) Forced exhalation produces a bronchodilator effect.

Accepted Answer

All values from a series of peak flow measurements should be reported because PEF (peak expiratory flow) may decrease with repeated efforts. This is especially important in patients with asthma who may experience worsening airflow limitation or fatigue with repeated measurements. By reporting all values, the healthcare provider can make a more accurate assessment of the patient's lung function and adjust treatment accordingly.