Quick Answer: What Does An Mslt Test For?

What is a positive Mslt?

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..

How do you read Mslt results?

Interpreting MSLT results If you had no more than two naps in which you achieved REM sleep and your mean latency is below eight minutes, this may be a sign of narcolepsy. Symptoms of this disorder include falling asleep without warning, as well as excessive daytime sleepiness.

What is Type 2 narcolepsy?

Type 2 narcolepsy (previously termed narcolepsy without cataplexy). People with this condition experience excessive daytime sleepiness but usually do not have muscle weakness triggered by emotions. They usually also have less severe symptoms and have normal levels of the brain hormone hypocretin.

What is the difference between Type 1 and Type 2 narcolepsy?

Type 1 narcolepsy (previously termed narcolepsy with cataplexy). This diagnosis is based on the individual either having low levels of a brain hormone (hypocretin) or reporting cataplexy and having excessive daytime sleepiness on a special nap test. Type 2 narcolepsy (previously termed narcolepsy without cataplexy).

What does a narcoleptic attack feel like?

Other symptoms of a narcoleptic attack include the following: Cataplexy: Sudden loss of muscle tone that makes you unable to move. Hallucinations: Unreal sensations that are perceived as real. Sleep paralysis: Total paralysis just before falling asleep or just after waking up.

How long are Mslt naps?

Multiple sleep latency test (MSLT) During the test electroencephalography, electrooculogram and electromyogram are recorded. There are 4 or 5 opportunities to nap for 20 minutes sessions, each two hours apart. The tendency to fall asleep during these naps is then measured.

What is normal sleep efficiency?

Normal sleep efficiency is considered to be 80% or greater. For example, if a person spends 8 hours in bed (from 10 p.m. to 6 a.m), at least 6.4 hours or more should be spent sleeping to achieve an 80% or greater sleep efficiency. Most healthy and young adults have sleep efficiencies above 90%.

What is the best medication for narcolepsy?

Doctors often try modafinil (Provigil) or armodafinil (Nuvigil) first for narcolepsy. Modafinil and armodafinil aren’t as addictive as older stimulants and don’t produce the highs and lows often associated with older stimulants. Side effects are uncommon, but may include headache, nausea or anxiety.

Can a blood test detect narcolepsy?

Multiple sleep latency test If you have narcolepsy, you’ll usually fall asleep easily and enter rapid eye movement (REM) sleep very quickly. You may also have a blood test to find out whether you have a genetic marker known as HLA DQB * 0602, which is associated with narcolepsy.

What causes narcolepsy Type 2?

In very rare cases, a person may develop another type of narcolepsy known as secondary narcolepsy. It results from a brain injury, specifically to the hypothalamus region, which regulates your sleep cycles. All types of narcolepsy cause excessive daytime sleepiness (EDS).

What if I can’t sleep during a sleep study?

If you absolutely can’t sleep during your study, you may be able to take a sleeping pill. This is one of the questions to ask ahead of time. Unless you take a prescription sleep aid regularly, you’ll be able to use a light over the counter medication like melatonin or Benadryl.

What are the five signs of narcolepsy?

There are 5 main symptoms of narcolepsy, referred to by the acronym CHESS (Cataplexy, Hallucinations, Excessive daytime sleepiness, Sleep paralysis, Sleep disruption). While all patients with narcolepsy experience excessive daytime sleepiness, they may not experience all 5 symptoms.

What should you not do before a sleep study?

Do not have any caffeine in the afternoon or evening before an overnight sleep study. This includes coffee, tea, cola, and chocolate. Also avoid drinking any alcohol. You do not want any substance to affect your sleep.

What is a nap test?

The multiple sleep latency test (MSLT) tests for excessive daytime sleepiness by measuring how quickly you fall asleep in a quiet environment during the day. … During each nap trial, you will lie quietly in bed and try to go to sleep. Once the lights go off, the test will measure how long it takes for you to fall asleep.

How do you test positive for narcolepsy?

Two tests that are considered essential in confirming a diagnosis of narcolepsy are the polysomnogram (PSG) and the multiple sleep latency test (MSLT). In addition, questionnaires, such as the Epworth Sleepiness Scale, are often used to measure excessive daytime sleepiness.

How long does a daytime sleep study take?

The test provides an objective measure of daytime sleepiness. You will be awakened after 20 minutes. If you do not fall asleep within 20 minutes, that nap trial will end. Should you fall asleep within the allotted time, the nap will be extended an additional 15 minutes.

Can you legally drive if you have narcolepsy?

When sleepiness is under good control, many people with narcolepsy are safe to drive. However, they must know their limits. Some individuals may be safe driving around town for 30 minutes but not on a four-hour, boring highway drive.

Is narcolepsy a disability?

The Social Security Administration (SSA) does not recognize narcolepsy as a medical condition that automatically qualifies you for disability benefits. Therefore, you must provide a Residual Functional Capacity (RFC) assessment that provides evidence of your disorder and how it affects your ability to work.