Which device is utilized to measure the extent of respiration?

The respirometer is specifically designed to measure the volume and rate of respiration. It provides quantitative data about the breathing patterns of an individual or an animal, helping veterinarians and technicians assess respiratory function. This device can measure various aspects of breathing, such as tidal volume and respiratory rate, which are crucial for evaluating a patient's respiratory health.

In contrast, an oximeter primarily measures oxygen saturation levels in the blood, while an electrocardiogram records electrical activity of the heart, and a stethoscope is used to listen to heartbeats and respiratory sounds. Although these tools are valuable in assessing various aspects of patient health, they do not provide direct measurements of respiratory volume or rate as the respirometer does. Hence, the respirometer is the most appropriate choice for evaluating respiration specifically.