MAXIMAL EXPIRATORY FLOW RATE Meaning and
Definition
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Maximal Expiratory Flow Rate (MEFR) refers to the maximum rate at which air can be expelled from the lungs during a forceful exhalation. It is a measure of lung function and is commonly used in clinical assessments to evaluate respiratory health and diagnose certain breathing disorders.
MEFR is often assessed using a spirometer, a device that measures the volume of air a person can exhale forcefully in a given time period. During a spirometry test, the individual breathes in as deeply as possible and then exhales with maximum effort. The flow rate of air is measured at various time points during the exhalation, and the highest value is recorded as the MEFR.
This parameter is crucial in diagnosing conditions such as chronic obstructive pulmonary disease (COPD), asthma, and other respiratory conditions. A lower MEFR value may indicate narrowed or blocked airways, which can be indicative of a breathing disorder. Additionally, MEFR can help determine the severity of respiratory impairment and monitor the effectiveness of treatments.
It is important to note that MEFR alone cannot provide a comprehensive evaluation of lung function. Therefore, it is often compared to other spirometry measurements, such as forced expiratory volume in one second (FEV1), to gain a more accurate assessment of lung health.
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