About Obstructive Sleep Apnea

Sleep Diagnostic

Sleep Devices

Respiratory Devices

About VitalAire-Avattvon

Type I - Comprehensive Sleep Diagnostic - Full Polysomnography

A Full PSG (Polysomngraphy) is the most complete form of Sleep Testing.

This usually requires at least 1 night stay in the hospital. A sleep technologist will place electrode sensors to monitor your brain activity, oxygen level, eye and limb movements, muscle tone, and heart rate.  Nasal cannula and belts will be placed to measure your respiratory effort. If the recordings detect effort in breathing but no airflow, you are suffering from OSA. However, if there is no effort in breathing and no airflow, you could be having Central Sleep Apnea. The signals are transmitted to a computer and finally the results are either scored by the sleep technologist or a sleep physician.

A full PSG study can detect other forms of sleep disorders such as insomnia, periodic leg movement syndrome. The electrodes can record up to 60 channels of recording such as EEG, EOG, EKG,EMG.

EEG (electroencephalogram) :

to provide a readout of the brain activity that records the stages of sleep. The EEG Elecetrodes are placed according to the International 10-20 system.      

EMG (electromyogram) :

to measure muscle tension in the body as well as to monitor for excessive amount of leg movements during sleep.

to be place on chin to record bruxism.

EOG (electro-oculogram) :

to pick up the activity of the eyes in virtue of the electropotential difference between the cornea and the retina (the cornea is positively charged relative to the retina). This helps to determine when REM sleep occurs, of which rapid eye movements are characteristic, and also essentially aids in determining when sleep occurs.

EKG (electrocardiogram) :

these electrodes measure the electrical activity of the heart as it contracts and expands, recording such features as the "P" wave, "QRS" complex, and "T" wave. These can be analyzed for any abnormalities that might be indicative of an underlying heart pathology.

Nasal airflow :

this allows the clinician/researcher to measure the rate of respiration and identify interruptions in breathing. Respiratory effort is also measured in concert with nasal/oral airflow by the use of belts. These belts expand and contract upon breathing effort.

Snore microphone :

to record snoring activity


An overnight Home Sleep Screening can tell whether you are suffering from Sleep Apnea. A trained Sleep Techinican will set up the equipment at your home an hour before your bed-time and will return the next morning to collect the recording. Data will be analyzed by our experienced RPSGT. Your sleep report will be ready within 48hours.

Order your sleep screening today. call us at 6733 1148 or write to us at

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