What does a pneumotachometer measure?

• A. A device that measures airflow
• B. A device for measuring blood pressure
• C. A device that checks lung capacity
• D. A device to assess vocal cord function

Answer: (A)

A pneumotachometer specifically measures airflow, making it an essential tool in respiratory testing. It captures the rate at which air flows in and out of the lungs, providing critical data for evaluating respiratory function. This measurement is important for understanding various aspects of lung health, including detecting airflow obstructions or evaluating the effectiveness of treatments for conditions like asthma or COPD (chronic obstructive pulmonary disease).

The other options describe different types of devices. For instance, a device for measuring blood pressure focuses on cardiovascular health, while something that checks lung capacity typically refers to spirometers, which measure the volume of air the lungs can hold rather than the flow rate. A device assessing vocal cord function would be related to laryngoscopy or stroboscopy, which inspect the structures and movements of the vocal cords rather than measuring airflow. Thus, the accurate description of a pneumotachometer is that it measures airflow, highlighting its relevance in respiratory assessments.