What Exactly is Obstructive Sleep Apnea (OSA)?
Apnea literally means “cessation of breath”. In other words, apnea is when you stop breathing. Obstructive Sleep Apnea (OSA) is simply when your airway becomes obstructed during sleep, causing you to stop breathing. The human upper airway is surrounded by muscles. The largest of these muscles is the tongue. When we are awake we have tightness, or tonicity, in our upper airway muscles, but during sleep these muscles relax.
Obstructive sleep apnea occurs when we breathe during sleep, the throat and upper airway muscles relax and may begin to vibrate (this vibration is what causes snoring). Eventually these muscles relax even more and can collapse into the airway, effectively closing your throat and prohibiting air from flowing into your lungs. When you airway collapses and you stop breathing, your body responds as if you are suffocating. Your brain realizes that you are not receiving oxygen from your lungs, and arouses you from deeper stages of sleep (where rest occurs) to a lighter stage of sleep. By moving to a lighter stage of sleep your brain is able to contract your throat and upper airways muscles to open your airway and help you resume breathing. This tightening of your upper airways muscles helps force open your airway and allow air and oxygen to flow into your lungs so you do not suffocate. This cycle of suffocation (apnea) and arousal to breath can happen hundreds of times a night. In most cases you do not fully awake, so you may not even realize this is happening to you every night! Obstructive Sleep Apnea (OSA) can cause excessive daytime sleepiness, mental impairment, cardiovascular problems, heart attack, stroke, diabetes, impotence, acid reflux, and a multitude of other undesirable side effects. Obstructive Sleep Apnea is a serious and progressive condition that can lead to serious health problems and even death if left untreated.
Symptoms and Risk Factors of OSA
- Symptoms: Snoring, Excessive Daytime Sleepiness, Pauses in Breathing While Sleeping
- Risks: Hypertension, Diabetes, Heart Disease, Driving and Work-Related Accidents, Stroke
Recent studies have shown that 1 in 4 adults in the United States (31% of all men and 21% of all women over 18) are at “high risk” for Obstructive Sleep Apnea (based on analysis of the National Sleep Foundation’s 2005 Sleep in America survey). It is estimated that the American public spends over $3 billion every year on the diagnosis and treatment of sleep apnea! This is a serious health issue affecting millions of Americans.
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