obstructive sleep apnea
With obstructive sleep apnea your breathing pauses while you are asleep because your airway has become narrowed or partly blocked.

When you sleep, all of the muscles in your body become more relaxed. This includes the muscles that help keep your throat open so air can flow into your lungs.

Normally, your throat remains open enough during sleep to let air pass by. Some people have a narrow throat. When the muscles in their upper throat relax during sleep, the tissues close in and block the airway. This stop in breathing is called apnea.

Loud snoring is a telltale symptom of sleep apnea. Snoring is caused by air squeezing through the narrowed or blocked airway. Not everyone who snores has sleep apnea though.

Other factors also may increase your risk:
• A lower jaw that is short compared to your upper jaw
• Certain shapes of the roof of your mouth (palate) or airway that cause it to collapse more easily
• Large neck or collar size (17 inches or more in men and 16 inches or more in women)
• Large tongue, which may fall back and block the airway
• Obesity
• Large tonsils and adenoids that can block the airway

Sleeping on your back can also cause your airway to become blocked or narrowed.
Central sleep apnea is another sleep disorder during which breathing can stop. It occurs when the brain temporarily stops sending signals to the muscles that control breathing.

If you have obstructive sleep apnea, you usually begin snoring heavily soon after falling asleep.
• The snoring often becomes very loud.
• Snoring is interrupted by a long silent period while your breathing stops.
• The silence is followed by a loud snort and gasp, as you attempt to breathe.
• This pattern repeats throughout the night.

Most people with obstructive sleep apnea do not know their breathing starts and stops during the night. Usually, a sleep partner or other family members hear the loud snoring, gasping, and snorting. Snoring can be loud enough to hear through walls.

People with sleep apnea may:
• Wake up unrefreshed in the morning
• Feel sleepy or drowsy throughout the day
• Act grumpy, impatient, or irritable
• Be forgetful
• Fall asleep while working, reading, or watching TV
• Feel sleepy while driving or even fall asleep while driving
• Have hard-to-treat headaches

Other problems that may occur include:
• Depression
• Hyperactive behavior, especially in children
• Difficult to treat high blood pressure
• Leg swelling (if apnea is severe)

Exams and Tests
Your health care provider will take your medical history and do a physical exam.
• Your provider will check your mouth, neck, and throat.
• You may be asked about daytime sleepiness, how well you sleep, and bedtime habits.

You may need to have a sleep study to confirm obstructive sleep apnea.

Other tests that may be performed include:
• Arterial blood gases
• Electrocardiogram (ECG)
• Echocardiogram
• Thyroid function studies

Treatment helps keep your airway open while you sleep so your breathing does not stop.

Lifestyle changes may help relieve symptoms in people with mild sleep apnea, such as:
• Avoid alcohol or medicines that make you sleepy before bedtime. They can make symptoms worse.
• Avoid sleeping on your back
• Lose excess weight

Continuous positive airway pressure (CPAP) devices work best to treat obstructive sleep apnea in most people.
• You wear a mask over your nose while you sleep.
• The mask is connected by a hose to a small machine that sits at the side of your bed.
• The machine pumps air under pressure through the hose and mask and into your airway while you sleep. This helps keep your airway open.

It can take some time to get used to sleeping with CPAP therapy. Good follow-up and support from a sleep center can help you overcome any problems using CPAP.

Dental devices may help some people. You insert them into your mouth while you sleep to keep your jaw forward and the airway open.
Other treatments may be available, but there is little evidence that they work. It is best to talk with a doctor who specializes in sleep problems before trying them.

Surgery may be an option for some people. It is often a last resort if other treatments did not work and you have severe symptoms. Surgery may be used to:
• Remove extra tissue at the back of the throat.
• Correct problems with the structures in the face.
• Create an opening in the windpipe to bypass the blocked airway if there are physical problems.
• Remove the tonsils and adenoids.

Surgery may not completely cure obstructive sleep apnea and may have long-term side effects.

Outlook (Prognosis)
If not treated, sleep apnea may cause:
• Anxiety and depression
• Loss of interest in sex
• Poor performance at work or school

Daytime sleepiness because of sleep apnea can increase the risk of:
• Motor vehicle accidents from driving while sleepy
• Industrial accidents from falling asleep on the job

In most cases, treatment completely relieves symptoms and problems from sleep apnea.

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