MSLT is used to diagnose narcolepsy and idiopathic hypersomnia.  This test involves taking a series of naps throughout the day.  Most patients will also spend the night prior to the MSLT in the lab for a PSG, so the monitoring devices described in the PSG section are already in place.

During each nap opportunity, the patient is allowed a certain amount of time to fall asleep, then, a certain amount to sleep.  The tech monitors to make sure the patient is not sleeping  between nap opportunities.

Click this link for more detailed information on what to expect during an MSLT in our Sleep Center and how to prepare.