Multiple Sleep Latency Test (MSLT)
Multiple Sleep Latency Test in Rockville, MD
The Multiple Sleep Latency Test (MSLT) is a diagnostic test that assesses the sleepiness and drowsiness of a person. The test measure the time it takes for a person to fall asleep during a series of nap opportunities throughout the day. It is typically used to diagnose narcolepsy or idiopathic hypersomnia.
The Consultation
During your consultation with a sleep doctor, you will be asked a series of questions to assess your level of sleepiness. Your medical history, medications, and any other pertinent information will be reviewed with you. At The Sleep Clinic, we strive to work with our patients to ensure that they are full informed and comfortable with the procedure. All questions and concerns will be addressed.
The Sleep Study
During an MSLT, the patient is asked to take 4-5 naps at two-hour intervals during the day. Each nap lasts 20 minutes and the patient is monitored for EEG (electroencephalogram) activity to determine when they have fallen asleep. The time it takes to fall asleep during each nap, along with the type of sleep patterns observed, is used to evaluate the degree of sleepiness or drowsiness.
Patients should expect to spend about 5-6 hours in the testing environment for the MSLT. You will be required to do a Polysomnogram the night before the MSLT to determine adequate quantity of sleep and diagnosis of any other sleep disorders.
How to prepare
- Anxiety and/or depression
- Age
- Caffeine
- Drugs and medications
- Amount of sleep prior to the study
- Keep a sleep diary for 2 weeks.
- Maintain a regular sleep schedule. This may help identify other factors that may be causing daytime sleepiness. It will also help to ensure that you are allowing an adequate amount of time for sleep.
- Avoid the use of stimulants such as caffeine prior to your MSLT.
- You may be asked to stop taking certain medications that may alter the results of your test.
- You may be required to take a drug test the morning of your MSLT. The drug test is to ensure that the MSLT will be accurate. The results of the drug test will be kept private between you and your doctor.
