Polysomnography (PSG)

Polysomnography (PSG)

Definition

Polysomnography (PSG) is a sleep study that records your brain waves, heart rate, and breathing while you sleep. It helps doctors understand sleep disorders and improve your sleep quality.

Example

If you're having trouble sleeping, your doctor might recommend a polysomnography test to diagnose any underlying issues.

Synonyms

sleep study sleep test overnight sleep study

Frequently Asked Questions

What is PSG in a sleep study?

PSG, or polysomnography, is a comprehensive sleep study used to diagnose sleep disorders by monitoring brain waves, oxygen levels, heart rate, and breathing during sleep.

What is PSG testing?

PSG testing involves recording various physiological parameters during sleep, including EEG, EOG, EMG, and respiratory patterns, to assess sleep quality and identify any abnormalities.

What is a normal sleep efficiency PSG?

Normal sleep efficiency, measured during a PSG, is typically considered to be 85% or higher, indicating that a person spends most of their time in bed actually sleeping.

How is a polysomnography test done?

A polysomnography test is conducted in a sleep lab where sensors are attached to the patient’s body to monitor sleep stages, breathing, and other functions throughout the night.

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