Which statement is true regarding Type 2 sleep studies?

Which statement is true regarding Type 2 sleep studies?

• A. They must include EEG, EOG, and pulse oximetry
• B. They are only used in laboratory settings
• C. No electrodes are needed for Type 2 studies
• D. They do not include pulse oximetry

Answer: (A)

Type II sleep studies are a full polysomnography recording, often used in an unattended setting. Because the goal is to capture complete sleep architecture and breathing during the night, this study includes EEG to track brain activity for sleep staging, EOG to identify eye movements, and pulse oximetry to monitor oxygen saturation. Having these sensors allows precise scoring of sleep stages (NREM and REM) and detection of desaturation events associated with breathing disorders such as obstructive sleep apnea. In addition to these, Type II PSG also records other standard channels like respiratory effort and airflow, making it the most comprehensive home or unattended PSG option. This is why the statement that these studies must include EEG, EOG, and pulse oximetry is correct.

Type II sleep studies are a full polysomnography recording, often used in an unattended setting. Because the goal is to capture complete sleep architecture and breathing during the night, this study includes EEG to track brain activity for sleep staging, EOG to identify eye movements, and pulse oximetry to monitor oxygen saturation. Having these sensors allows precise scoring of sleep stages (NREM and REM) and detection of desaturation events associated with breathing disorders such as obstructive sleep apnea. In addition to these, Type II PSG also records other standard channels like respiratory effort and airflow, making it the most comprehensive home or unattended PSG option. This is why the statement that these studies must include EEG, EOG, and pulse oximetry is correct.