Sleep Testing
Understanding Sleep Tests in Alaska: PSG, Home Testing, MSLT & MWT
Different sleep tests answer different questions. An overnight polysomnogram records a broad set of signals, home sleep apnea testing focuses on breathing-related data for selected patients, and daytime MSLT or MWT testing may be ordered for specific questions about sleepiness or wakefulness.
Polysomnography (PSG)
An in-lab polysomnogram records sleep and physiologic signals through the night. Depending on the study, this can include brain-wave activity, eye movements, heart rhythm, breathing, oxygen level, muscle activity and body movement.
Home Sleep Apnea Testing (HSAT)
Home testing uses portable equipment to record a focused set of breathing-related signals while an appropriate patient sleeps at home. It is not a substitute for a full laboratory study in every clinical situation.
Multiple Sleep Latency Test (MSLT)
MSLT is a daytime study, typically performed after an overnight study, that measures how readily a person falls asleep during scheduled nap opportunities. It may be used when a clinician is evaluating significant daytime sleepiness.
Maintenance of Wakefulness Test (MWT)
MWT is a daytime study that evaluates the ability to remain awake during scheduled test periods in a quiet environment. It may be ordered when wakefulness and alertness need to be assessed clinically.
Which test is right for you?
The testing choice should come from the clinical question, your symptoms and your health history. Convenience and travel matter, especially in Alaska, but the most useful test is the one that appropriately answers the question your clinician is evaluating.
Ready to ask the next question?
If sleep symptoms are persistent or affecting daily life, an evaluation can help determine whether sleep testing or another next step is appropriate.
Request an appointment →