Which of the following is primarily used to measure airflow in respiratory mechanics?

The pneumotachometer is specifically designed to measure the rate of airflow in respiratory mechanics. It works by capturing the flow of air as a patient breathes and quantifying that flow based on changes in pressure across a known resistance. The device can provide valuable data regarding the volume of air inhaled and exhaled over time, which is essential for evaluating lung function and diagnosing respiratory conditions.

Flow meters are useful for measuring the volume of gas flowing through a system, but they do not provide the detailed information on flow rate that a pneumotachometer does. Manometers are typically used to measure pressure and are not aimed at measuring airflow directly. Oximeters focus on measuring oxygen saturation levels in the blood, which, while important in respiratory care, does not pertain to the measurement of airflow. Thus, the pneumotachometer is the most appropriate tool for evaluating airflow in respiratory mechanics.