Foreword	Outline of Sleep Physiology	Sleep disorders	Sleep Apnea Syndrome
Sleep study	Oral appliance	Medical Team	Contact us

Sleep study

The Polysomnography is to record the physiological condition and sleep cycles of the patient’s sleep in the night. It can check whether the patient has sleep apnea, and evaluate the type of breathing interruption to be obstructive, central or mixed.

When doing the Polysomnography, the patient shall register at the sleep laboratory in the night, and sleep whole night in the laboratory. During the sleep study, the patient’s body shall stick with some electrodes. The examination items include:

ECG
EEG: In order to identify the sleep stages and make differential diagnosis of other sleep disorders.
EMG: Records the muscle tone of the facial and limb muscles.
EOG: Records the activities of the eyeballs in order to evaluate the sleep stages and eye movement.

Record of the air flow when breathing: the pressure transducer (shall be placed on the nose and mouth of the patient) also records the snoring degree and times during the sleep.

Chest movement during breathing
Oxygen saturation in the blood
Position changes during the sleep

Sometimes it may include the penile tumescence recording and other signal recordings in order to detect the breathing, extremities movement and male sexual disturbances which accompany the sleep.

The physicians of the Sleep Disorders Center will propose a suitable treatment according to the patient’s medical history, clinical signs and Polysomnography results.

Monitor bed and the examination equipments.	Continuous Positive Airway Pressure (CPAP) machine.
Sleep surveillance monitor and video recorder.	Working station.