What is MSLT in sleep study?

In the multiple sleep latency test (MSLT), a person is given 4-5 opportunities to sleep every two hours during normal wake times. The specialist uses the test to measure the extent of daytime sleepiness (how fast the patient falls asleep in each nap, also called sleep latency), and also how quickly REM sleep begins.

What is a normal MSLT?

Normal adult mean sleep latency is between 10 and 20 min. Pathologic sleepiness is defined as a mean sleep latency <5 min and this has been associated with impaired performance. According to the AASM, a sleep latency of <8 min is diagnostic of sleepiness.

What is MSLT in narcolepsy?

A positive MSLT is obtained when the patient falls asleep with a mean sleep latency below 8 minutes in the naps, and had at least no more than 1 nap (for idiopathic hypersomnia) or 2 naps (for narcolepsy diagnosis) where REM sleep was reached. …

What is MSLT and MWT?

The multiple sleep latency test (MSLT) involves multiple trials during a day to objectively assess sleep tendency by measuring the number of minutes it takes the patient to fall asleep. Maintenance of Wakefulness Test (MWT) is a facility based study that is used to measure the ability to stay awake and alert.

Does narcolepsy cause weight gain?

Many people with narcolepsy have a tendency toward being overweight. Adults with narcolepsy weigh about 15–20% more than would be expected on average in the general population. In the months after narcolepsy begins, sudden weight gain can be dramatic, with some children gaining 10–40 pounds over several months.

How long do you sleep during a sleep study?

This typically does not affect the results. Nearly everyone falls asleep during a sleep study. In most cases, you do not need a full eight hours of sleep for the doctor to make a diagnosis. Occasionally, you may be prescribed medication to help you sleep during the study.

How much does a MSLT cost?

The price for an MSLT can range from $600 – $2200.

How long does a nap study last?

The MSLT will measure how long it takes you to fall asleep. It will also measure how long it takes for you to reach REM sleep. The technologist will awaken you after you have slept for 15 minutes. If you are unable to fall asleep, the nap trial will end after 20 minutes.

What does cataplexy mean?

Cataplexy. This sudden loss of muscle tone while a person is awake leads to weakness and a loss of voluntary muscle control. It is often triggered by sudden, strong emotions such as laughter, fear, anger, stress, or excitement. The symptoms of cataplexy may appear weeks or even years after the onset of EDS.

How long should someone with narcolepsy sleep?

In addition to any of the typical narcolepsy symptoms, people with secondary narcolepsy also have severe neurological problems and require large amounts (>10 hours) of sleep. To understand the symptoms of narcolepsy, it helps to first understand how sleep happens normally.

Is narcolepsy considered a disability?

Narcolepsy isn’t one of the conditions the SSA considers a disability. But if your symptoms interfere with your ability to do your job, you may still qualify for benefits. The Disability Benefits Help website offers a free evaluation to help you determine whether your condition is considered a disability.