Multiple choice general knowledge

What does PEFR stand for?

  1. peak excreted fasting ratio

  2. positive expired flow ratio

  3. positive expiratory fasting rate

  4. peak expiratory flow rate
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D Correct answer
Explanation

PEFR stands for Peak Expiratory Flow Rate, a measurement of how fast a person can exhale air from their lungs. It's measured using a peak flow meter and is commonly used to assess respiratory conditions like asthma and COPD. The rate indicates lung function and helps monitor airway obstruction. The 'expiratory' phase is key - it measures exhalation, not fasting or excretion.

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