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Diagnostic (DX)
Polysomnogram (PSG)

The continuous and simultaneous recording of physiological variables during sleep (EEG, EOG, EMG-the three basic stage scoring parameters) ECG, respiratory airflow, respiratory movements, limb movements, and other physiological variables.

Split Night (SN)

A diagnostic study followed by a therapeutic study during the same night of evaluation.

Multiple Sleep Latency Test (MSLT)

A tool used to assess daytime functioning as an index of the adequacy of sleep. MSLT involves repeated measurement of sleep latency (time to onset of sleep) under standardized conditions during a day following quantified nocturnal sleep. The average latency across four to five tests (administered every 2 hours during the day) is taken as an objective measure of daytime sleep tendency.


Maintenance of Wakefulness Test (MWT)

The measurement of the ability to stay awake while the patient sits up in a dimly lit room.


Home Sleep Testing (HST)

A monitor worn overnight that records breathing, oxygen levels, and breathing effort outside of the sleep lab at home.


Therapeutic Titration (Non-invasive)

CPAP- Continuous Positive Airway Pressure

BIPAP – Bi (two) Positive Airway Pressure

ASV – Adaptive Servo Ventilation

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