Sleep Study
Evaluation of Sleep
Wake Disorders (Polysomnography)

Electrodes on Head

This electrophysiologic procedure records a variety of body functions during sleep, including electrical activity of the brain, eye movement, muscle activity, heart rate and rhythm, breathing effort, air flow through the nose and mouth, and blood oxygen levels.

The polysomnogram (sleep study) is usually performed at night, during the hours you normally sleep. A number of sensors and wires (electrodes) are taped to your skin by a technologist, who will monitor you throughout the night using sophisticated electronic, video and audio recording devices. The technologist will observe changes in your state of sleep, heart and breathing activity, and any unusual sounds or body movements you may produce. They may also institute therapy if your breathing is significantly disrupted while you sleep. (see CPAP)

Oxygen Sensor

The entire test takes about 8 to 10 hours. Patients normally leave the Sleep Center by 7:00 am. The results of the test are then examined in detail and tabulated by a specially trained technologist. A physician specializing in the analysis and treatment of Sleep Disorders then reviews the study in depth, reporting a diagnostic impression and making recommendations for appropriate treatment. The treatment is usually administered by the patient's personal physician.