Peak exhaust flow

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Minipikflometer (peak flow regulator)

Peak expiratory flow (PEF) - a spirometric parameter that determines the maximum airflow through the respiratory tract during maximum exhalation, expressed in l / min.

The founder of the first peak flow meter was Basil Martin Wright in 1959. To date, devices have been used that use the principle of a peak flow meter, also available in miniaturized versions.

Portable picoflometers allow patients with bronchial asthma and COPD to perform independent self-monitoring of peak expiratory flow.

The PEF value depends on the time of day: the lowest is in the morning, between 4 and 6, and the highest in the afternoon, between the hours of 16 and 18. The difference is less than 20% for normal daily variability.

The correct PEF value for a particular patient depends on his or her gender, age, height and effort. Approximate range of the standard corresponds to ± 20% of the value due.

During spirometry, peak inspiratory flow (PIF) can also be measured, recorded during maximum inhalation. PIF does not have much diagnostic value, but it can be helpful when selecting an inhaler. Bibliography

See terms related to medical terms and related wikipedia.

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