Possible Complications
There are no major, lasting problems from having this test.
Reasons for Test
This study is done to evaluate sleeping problems, such as:
- Trouble falling or staying asleep— insomnia
- Breathing that stops during sleep— apnea
- Problems falling asleep suddenly during the day— narcolepsy
- Nightmares and sleepwalking
- Problems with arm or leg movement during sleep
What to Expect
Prior to Test
The care team may meet with you to talk about:
- Any allergies you may have
- Current medicines, herbs, and supplements that you take and whether you need to stop taking them before the study
- Foods and drinks you may need to avoid, such as alcohol and items with caffeine
- How to wash your hair before the study
- What to wear for the study
Description of Test
The test is given in the evening after some time to relax.
Electrodes are attached to the head, legs, and chest. Other monitors are placed
around the chest, near the nose and mouth, and on the finger.
For most of the night, the test is done in the person's
normal sleep position. But, part of the test may be done in a certain sleep position.
The person sleeping is watched by video. This will be done to make sure that the
electrodes do not come loose. They can also be taken off to use the bathroom.
Sometimes, the test may show the need for a certain treatment, such as continuous positive airway pressure (CPAP). This may be started
midway through the night.
The doctor may ask for an additional test for narcolepsy. This
is known as the Multiple Sleep Latency Test (MSLT). This involves staying for part of
the next day. The person will be asked to nap for up to 20 minutes every 2 hours. The
test will measure the time it takes to fall asleep and the time it takes to go into
deep sleep.
After Test
The electrodes will be removed in the morning. Most people will be able to go home.
How Long Will It Take?
About 10 to 12 hours
Will It Hurt?
No.
Results
Results from this test may be ready right away or within a few
weeks. The doctor will discuss the results.
Problems to Look Out For
There should not be side effects or lasting problems from this study. Call your doctor if you have any concerns.
If you think you have an emergency, call for medical help right away.