How Do Sleep Tests Diagnose Narcolepsy?
How Do Sleep Tests Diagnose Narcolepsy?
Understanding the Process
Diagnosing narcolepsy often involves sleep tests like polysomnography and the multiple sleep latency test. Learn how these tests work and what they reveal.
Contents
- Polysomnography Explained
- Multiple Sleep Latency Test (MSLT)
- Interpreting Sleep Test Results
Polysomnography Explained
Polysomnography is an overnight test that records brain waves, oxygen levels, heart rate, and movements. It's used to exclude other sleep disorders and identify abnormal sleep patterns. This test is crucial in the narcolepsy diagnosis process.
Multiple Sleep Latency Test (MSLT)
The MSLT measures how quickly you fall asleep during the day. It provides objective evidence of sleepiness and measures REM sleep periods. A mean sleep latency of under 8 minutes and multiple SOREMPs are indicative of narcolepsy.
Interpreting Sleep Test Results
Results showing rapid sleep onset and REM intrusion indicate narcolepsy. These tests help differentiate narcolepsy from other sleep conditions. Accurate interpretation is essential for a correct diagnosis.
FAQs
What is polysomnography?
It's an overnight test recording various sleep metrics.
What does the MSLT measure?
It measures how quickly you fall asleep and REM sleep onset.
What's a sign of narcolepsy in sleep tests?
Rapid sleep onset and multiple REM periods indicate narcolepsy.
Wrapping Up
Understanding sleep testing is key to diagnosing narcolepsy accurately.
Additional References
- Johns MW. A new method for measuring daytime sleepiness: the Epworth sleepiness scale. Sleep 1991; 14:540.
- Cairns A, Bogan R. Prevalence and Clinical Correlates of a Short Onset REM Period (SOREMP) during Routine PSG. Sleep 2015; 38:1575.
This article has been reviewed for accuracy by one of the licensed medical doctors working for Doctronic.