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polysomnography

polysomnography

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Polysomnography, also called a sleep study, uses multiple electrodes and devices (multi-channel) to gather information about a patient during sleep. A standard in-laboratory study records brain waves, eye movements, oxygen levels in the blood, jaw movement, heart rate, breathing rate, airflow, respiratory effort, sound, and limb movements. Taken as a total picture, the results of these recordings allow a calculation of sleep stage and disorders of sleep. Limited-channel sleep studies can take place outside of the sleep laboratory.

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