What is Sleep Apnea?
Even though you’ve had a full night of sleep, you wake up feeling exhausted and have problems concentrating throughout the day. People around you may also complain about loud snoring during the night.
If this is the case, you may have sleep apnea, a common sleep disorder in which breathing stops or gets very shallow during sleep.
More people should be asking “what is sleep apnea?” – it affects over 18 million adults in the US alone.
These breathing pauses can last from a few seconds to minutes and may occur 30 times or more an hour in some individuals. The breathing interruptions may limit the supply of oxygen.
As the brain and body become oxygen deprived, normal sleep cycles are disturbed when you fall out of restorative deep sleep into light sleep. The result is that you wake up feeling unrested.
Most people are not aware they are having these breathing interruptions during the night. It may first be noticed by a bed partner or roommate who might also complain to you about snoring.
There are three types of sleep apnea:
Obstructive sleep apnea, the most common sleep apnea, is a mechanical problem. It occurs when muscles in the throat relax during sleep. This causes the airway to collapse, interrupted breathing, and loud snoring.
Central sleep apnea is a communication problem. It occurs when the brain fails to send the right signals to the muscles that control breathing. People with this sleep apnea seldom snore.
Complex sleep apnea occurs when individuals experience symptoms of both obstructive and central sleep apnea. Sometimes patients being treated with CPAP for obstructive sleep apnea develop central sleep apnea.
What are the symptoms of sleep apnea?
If you’re still wondering what is sleep apnea, think about it in terms of symptoms…
- Pauses in breathing while asleep
- Choking, gasping, or snorting sounds
- Loud snoring, although not all people who snore have sleep apnea
- Dry mouth or sore throat
- Difficulty staying asleep
- Waking up frequently to urinate
- Morning headaches
- Fatigue during the day
- Excessive daytime sleepiness
- Irritability or mood swings
- Attention, memory, or learning problems
What are the risk factors for sleep apnea?
- Weight – about half of people with sleep apnea are overweight
- Being male – sleep apnea is more common in men than women
- Middle aged – risk increases as you get older
- Family history of sleep apnea
- Large neck – greater than 16-17 inches
- High blood pressure – very common in people with sleep apnea
- Enlarged tonsils or tongue – may block the airway
- Alcohol, sedatives – they relax the muscles in your throat
- Smoking – may irritate and inflame the upper airway
- Allergies, nasal congestion – you’re more likely develop sleep apnea if you have difficulties breathing through nose
- Other conditions – people who’ve had heart failure or a stroke are more at risk for central sleep apnea
Sleep apnea can have very serious health effects
If left untreated, sleep apnea and the lack of oxygen your body suffers from can have long-term effects on your health. It has been linked to high blood pressure, heart disease, stroke, diabetes, and depression.
Also, sleep apnea disturbs normal sleep cycles which can result in poor quality sleep. Besides waking up exhausted, poor sleep on a regular basis can put you at risk for other medical conditions.
How is sleep apnea diagnosed?
Knowing what is sleep apnea is just the first step – you have to figure out if you have it.
Unfortunately, many people with sleep apnea are not aware they have a sleep disorder. In fact, officials estimate that there are 10 million undiagnosed Americans.
If you suspect you have sleep apnea, it’s important to see a doctor. Diagnosis will involve a review of medical and family histories, risk factors, a physical exam, and tests to assess your sleep patterns.
If you have symptoms of sleep apnea, you may be referred for a polysomnogram, the gold standard for diagnosing sleep disorders. It’s an overnight sleep study that tracks brain activity, heart rate, blood pressure, blood oxygen, air movement, and snoring.
Your doctor may also want to do a multiple sleep latency test which will measure how quickly you nod off to sleep during the day.
How is sleep apnea treated?
Treatment is based on your individual situation.
The goal is to restore regular breathing during sleep, relieve snoring, and help you wake up feeling more rested.
Treatment can include a variety of things based on the severity of your sleep apnea:
1) Lifestyle changes. For mild sleep apnea, changes in daily activities and habits might be enough to improve your situation. This could include maintaining a more regular sleep routine, avoiding substances like alcohol that make that may relax your throat muscles too much, and quitting smoking. Learn more about lifestyle changes here.
2) Positional therapy. Sleeping on your side instead of your back may help keep your throat open.
4) Adjusting your prescriptions. Your doctor may make changes to any medications that relax muscles in the throat.
5) Losing weight. Even a small amount of weight loss can help improve your symptoms.
7) CPAP. Your doctor may recommend CPAP (continuous positive airway pressure), the most common noninvasive treatment for moderate to severe sleep apneas. CPAP uses a machine with an air blower connected by a tube to a face mask to force air into your airways so that they stay open while you’re asleep. You can learn more about CPAP here.
So, what is sleep apnea?
- a common disorder
- interrupts breathing, limits oxygen to the body, and keeps you from getting restful sleep
- can cause snoring
- can have serious & life-threatening health effects
- three basic types, obstructive (airway mechanical problems), central (brain-body communication problems), or complex (mechanical & communication problems)
- obstructive apnea is the most common
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