You will stay overnight at a sleep center. This study records your brain activity, eye movements, heart rate, and blood pressure.
Sleep studies are tests that record what happens to your body during sleep. The studies are done to find out what is causing your sleep problems. Sleep problems include:
Sleep apnea, when an adult regularly stops breathing during sleep for 10 seconds or longer. This may be caused by blocked airflow during sleep, such as from narrowed airways. Or it may be caused by a problem with how the brain signals the breathing muscles to work.
Problems staying awake, such as narcolepsy.
Problems with nighttime behaviors, such as sleepwalking, night terrors, or bed-wetting.
Problems sleeping at night (insomnia). This may be caused by stress, depression, hunger, physical discomfort, or other problem.
Problems sleeping during the day because you work at night or do rotating shift work. This sleep problem is called shift work sleep disorder.
Conditions such as periodic limb movement disorder, which is repeated muscle twitching of the feet, arms, or legs during sleep. Sleep studies can also determine whether you have a problem with your stages of sleep. The two stages of sleep are non–rapid eye movement (NREM) and rapid eye movement (REM). Normally, NREM and REM alternate 4 to 5 times during a night's sleep. A change in this cycle may make it hard for you to sleep soundly.
Why It Is Done?
-Sleep studies are done to find sleep problems, including:
Many health conditions can cause abnormal sleep. These include restless legs syndrome, obesity, heart or respiratory diseases, hypothyroidism, depression, and neuromuscular diseases (such as Parkinson's disease).
A second polysomnogram may be needed if you were unable to sleep long enough for the test. Also, after your sleep problem has been identified, you may need a second study if your doctor orders treatment such as continuous positive airway pressure (CPAP).
A split night study is another type of sleep study. During the first half of the night, you are checked for sleep apnea. During the second half of the night, your apnea is treated with breathing aids (such as CPAP) to open your blocked airway.
Portable sleep study equipment is available for a person to do sleep studies at home. This may be a choice for people who have problems sleeping in a sleep lab. But home sleep studies may not give the same results as a sleep lab.
In rare cases, a pH test may be done during a sleep study to see if there is reflux of stomach juices into the esophagus. For a pH test, a small wire is placed in the nose and guided to the lower part of the esophagus.
If you think you are experiencing any of these symptoms, a sleep study may be the test you need to diagnose any sleep issues you may be having.