Certified Pulmonary Function Technologist (CPFT) Practice Exam

Which device is specifically used to check high flow rates?

1. Digital spirometer

2. Peak flow meter

3. Volumetric flow meter

4. Manometer

The correct answer is: Peak flow meter

The peak flow meter is specifically designed to measure high flow rates of air that a patient can exhale. This device is particularly valuable in assessing airway function and monitoring conditions such as asthma, where quick and forceful expiratory flow is crucial. The peak flow meter provides immediate feedback on a patient's lung capacity and function, allowing for rapid assessment of their respiratory status. Digital spirometers can also measure flow rates but are typically used for a broader range of tests, including both high and low flow rates, rather than being specifically designed for high flow rates alone. Volumetric flow meters are more focused on measuring the volume of air rather than the high flow rates of airflow. Manometers measure pressure rather than flow, making them unsuitable for assessing air flow rates. In summary, the peak flow meter's design and intended use make it the preferred choice for specifically checking high flow rates of expiratory airflow.