What type of device is commonly used to measure airflow during sleep?

Airflow during sleep is primarily assessed using devices designed specifically to measure the movement of air in and out of the respiratory system. A nasal cannula or oronasal mask is commonly used for this purpose. These devices are positioned in a way that allows for the direct measurement of airflow as the individual breathes. The nasal cannula fits comfortably in the nostrils while an oronasal mask covers both the nose and mouth, making them effective in detecting respiratory events and patterns during sleep.

In contrast, an EEG monitor primarily records brain activity and does not provide information about airflow. A fingertip pulse oximeter measures blood oxygen levels and heart rate but does not directly assess airflow. A body position sensor can help determine the sleep position of a person but is not capable of measuring airflow. Therefore, the use of a nasal cannula or oronasal mask stands out as the most suitable method for measuring airflow during sleep studies.