Peak

Peak flow meter

A peak flow meter is a portable, inexpensive, hand-held device used to measure how air flows from your lungs in one 'fast blast'. In other words, the meter measures your ability to push air out of your lungs.

Overview

Peak flow meters come in two varieties: mechanical and digital. Both types are equally effective, and the choice between the two usually depends on personal preference. The peak flow meter measures the airflow through the bronchi and thus the degree of obstruction in the airways.

Usage

Peak flow meters are used to help manage asthma symptoms and control the effectiveness of an asthma treatment plan. They assist in monitoring a person's lung function and detecting changes or trends in asthma control.

Measurement

The measurement is made by blowing forcefully into the device. This measurement is called a peak expiratory flow rate (PEFR), which is measured in liters per minute. The PEFR can be compared to the expected PEFR for someone of the same age, sex, race, and height to determine if the patient's result is normal or low.

Importance

Regular use of a peak flow meter can help individuals with asthma to recognize early changes that may be signs of worsening asthma. By taking daily peak flow readings, people can learn what is normal for them, and this can help them see changes that may be a sign of worsening asthma before any symptoms appear.

See also

• Asthma
• Spirometry
• Pulmonology

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