PSG Studies (Baseline Diagnostic)
A PSG usually is done overnight in the sleep center. A PSG records brain activity, eye movements, heart rate, and blood pressure. A PSG also records the amount of oxygen in your blood, how much air is moving through your nose while you breathe, snoring, and chest movements. The chest movements show whether you’re making an effort to breathe.
CPAP Studies (Apnea Treatment)
This is similar to the PSG sleep study in addition to the CPAP/Bi-level therapy this is a study used to set the right level of continuous positive airway pressure for a person who has a type of sleep disorder breathing and will receive therapy.
SPLIT Studies (Diagnostic / Treatment)
During the first half of the night your sleep is assessed to determine whether you have sleep apnea and if so, the severity will be determined. During the second half of the night, you may be asked to use a CPAP machine. A technician will adjust the settings on the machine so the flow of air therapeutic for your sleep disorder breathing.
MSLT Studies (Night/Day Diagnostic)
This daytime sleep study measures how sleepy you are. It’s typically done the day after a PSG. The MSLT records whether you fall asleep during the test and what types and stages of sleep you’re having. Sleep has two basic types: rapid eye movement (REM) and non-REM. Non-REM sleep has three distinct stages. REM sleep and the three stages of non-REM sleep occur in regular cycles throughout the night. The types and stages of sleep you have during the day can help your doctor diagnose sleep disorders such as narcolepsy and idiopathic hypersomnia .An MSLT is repeated four or five times throughout the day. This is because your ability to fall asleep also changes throughout the day.
MWT Studies (Night / Day Diagnostic)
The Maintenance of Wakefulness Test (MWT) measures a person’s ability to stay awake in a quiet, dark and nonstimulating room for a period of time. This test is usually given to a person receiving therapy for conditions causing daytime sleepiness which have been diagnosed i.e. sleep apnea.