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home : columnists : columnists August 22, 2017

Sleep apnea a harmful condition associated with snorting

By Dr. John Roberts

Snoring can certainly be annoying, but it doesn't always indicate a serious medical problem. This week, however, I do want to focus on a harmful condition that can be associated with snoring - sleep apnea.

Sleep apnea is a condition where people have pauses in their breathing while sleeping. Most people have pauses to some degree, but people with sleep apnea have much longer pauses, sometimes lasting up to 30 seconds. These long pauses cause the level of oxygen in the blood to drop and carbon dioxide to rise. These changes can be very hard on the body, especially the heart and lungs.

There are two main types of sleep apnea - central and obstructive. Central sleep apnea is a problem with how the brainstem sends signals to the breathing muscles. It is not a very common cause of sleep apnea in adults; obstructive sleep apnea (OSA) is seen much more often.

Obstructive sleep apnea is caused by any type of obstruction to the flow of air in and out of the lungs. This usually occurs in the back of the throat when excess or loose tissue collapses into the throat when the throat muscles relax during sleep. This is why OSA is much more common in obese individuals - they have a lot of extra tissue in their throats.

When I see people in my office who feel they may have OSA, it is usually at the request of a spouse or significant other who is either tired of listening to the snoring or who has actually seen the patient stop breathing during sleep. They often describe a cycle of snoring respirations, followed by long pauses, then gasping for air. The snoring results from vibrations of the tissue in the back of the throat, quite similar to the vibrations of a guitar or piano string.

There are other signs and symptoms we ask about when evaluating people for OSA. Sleep apnea sufferers are unable to fall into a deep sleep - the apneas sometimes wake them tens or even hundreds of times per night. This can result in excessive daytime sleepiness and trouble falling asleep at work or school, while driving, etc. Patients frequently complain of fatigue, irritability, dry mouth, poor concentration and headaches. They may have hypertension or other heart or lung diseases. They often consume caffeine or other stimulants to try to stay awake during the day.

The diagnosis of sleep apnea is suggested by the history, but in order to confirm the diagnosis a sleep study or polysomnogram must be performed. This has historically been done in a sleep lab where the patient is connected to monitoring equipment that records respirations, brain wave activity, movements via a video camera as well as sensors that measure gas exchange in and out of the lungs. In-home portable sleep studies can be done as well, though they don't collect as much information. All of the sleep study data is collected, summarized or "scored," and interpreted by a physician who has received special training in sleep disorders.

There are very specific scoring criteria a patient must meet to be diagnosed with OSA. Once diagnosed, treatment usually involves a device called a CPAP (Continuous Positive Airway Pressure) machine that is connected to a mask worn on the face. The machine blows air into the patient's airway to keep it inflated to prevent the tissues from collapsing when sleeping. These machines may be set at a specific pressure or may adjust themselves automatically to maximize air flow.

If you feel you may have sleep apnea or know someone who does, you should see a physician to discuss testing. OSA is a very serious condition that can lead to or worsen cardiovascular, lung and neurologic problems. You can do a quick screen for sleep apnea here: bit.ly/2n10WUc. For more information on sleep apnea, see tinyurl.com/4ch2ch.

Dr. John Roberts is a local physician. His column appears in Monday's edition of the Times, and he has a daily health tip on the front page. Dr. Roberts is one of the owners of Sagamore News Media, parent company of The Times.

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