What is In-lab Sleep Study?
An in-lab sleep study, also known as polysomnography (PSG), is a diagnostic test conducted in a sleep center or laboratory to evaluate and monitor various physiological factors during sleep. It is often used to diagnose sleep disorders and assess the quality of sleep. During an in-lab sleep study, a patient stays overnight in a sleep clinic where their sleep patterns and related activities are monitored.
How does In-lab Sleep Study Work?
The study typically involves the placement of various sensors and electrodes on the patient’s body to measure:
- Brain activity: Electroencephalogram (EEG) monitors brain waves.
- Eye movement: Electrooculogram (EOG) measures eye movements.
- Muscle activity: Electromyogram (EMG) records muscle activity.
- Heart rate and rhythm: Electrocardiogram (ECG or EKG) monitors heart activity.
- Respiratory effort: Measures chest and abdominal movements.
- Airflow: Monitors breathing through the nose and mouth.
- Blood oxygen levels: Pulse oximetry measures oxygen saturation in the blood.
This comprehensive data helps sleep specialists analyze sleep architecture, identify abnormalities, and diagnose conditions such as sleep apnea, insomnia, narcolepsy, and other sleep disorders. The information gathered during the in-lab sleep study aids in developing an appropriate treatment plan for the individual based on their specific sleep-related issues.