What is the primary function of a Peak Flow Meter?

The primary function of a Peak Flow Meter is to evaluate pulmonary function. This device is specifically designed to measure the peak expiratory flow rate (PEFR), which indicates how quickly a person can exhale air. Monitoring this rate is crucial for individuals with respiratory conditions such as asthma or chronic obstructive pulmonary disease (COPD), as it helps assess the severity of airflow obstruction and track changes in lung function over time.

In contrast, a Peak Flow Meter is not used for measuring vital signs, which typically include heart rate, respiration rate, blood pressure, and temperature. It also does not determine blood sugar levels, a function that requires a specific device like a glucometer, nor does it assess heart rate, which is monitored using devices such as a stethoscope or heart rate monitors. Hence, focusing on pulmonary function makes the Peak Flow Meter an essential tool in respiratory healthcare.