1 in 10 males wake in the night, gasping for air. 1 in 10 males sleep for 8 hours and wake up tired and un-rested. 1 in 10 males are sleeping their way to high blood pressure and cardiovascular disease, memory problems, weight gain, impotency, and headaches. Sleep apnea is extremely common and affects more than twelve million Americans[sup]1[/sup]. The overwhelming majority of sleep apnea cases have not been identified.
“Apnea” literally means “without breath.” Sleep apnea is the reduction or absence of airflow during sleep and there are three types: obstructive, central, and mixed[sup]2[/sup].[ul][li]Obstructive: can be caused by sinus congestion or, more commonly, the relaxation of the soft tissue in the throat leads to blockage of the airway; []Central: the brain fails to signal the bodies muscles to breath;[]Mixed: a combination of both of the above.[/ul]In addition to sleep apnea, there is hypopnea (Hypopnea" also comes from Greek: “hypo” meaning “beneath” or “less than normal” and “pnea” meaning “breath.”) Hypopnea differs from apnea in that it is not the complete pausing of breath, but rather a lessening of airflow or a struggle to breathe. Both cause the level of oxygen saturation in the blood stream to drop. Both cause the brain to briefly arouse from in order for the person to resume breathing. Put simply, the brain never gets to rest and as a result, sleep is extremely fragmented and of poor quality.[/li]
Risk factors for apnea include:[li]being male[]being overweight[]being over 40[/li]However, it can also affect women, children and men at any age.
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PERSONAL INFORMATION
I’m 28, male and maybe 10# overweight, but fit and active by any standard. My apnea was first noticed by my roommates in college, ten years ago. Then, I was in excellent physical shape and three years later, when I joined the Marine Corps, I was arguably in the best shape of my life.
I took the second of a two-part sleep study last night. My symptoms include[li]snoring, []daytime drowsiness, and []non-restorative sleep (I wake up feeling unrested.)[/li]Out of 433 minutes recorded time, I was “asleep” for 406 minutes. Broken down, my sleep stages percentages were:[ul] [li]Wake: 2.6%[]Stage I: 13% (normally 2-5%)[]Stage II: 68.5% (normally 45-60%)[]Stage III/IV: 0% (normally up to 40% of sleep time) []REM: 15.8% (normally 20-25%)[/ul]I had, on average, 66.7 episodes of apnea/hypopnea (84.5 during REM.) Normal sleepers have <5. Again, broken down, the numbers fall out like this:[ul][]Central apnea: 0[]Obstructive apnea: 87[]Mixed apnea: 2Obstructive hypopnea: 364[/li]My brain had to wake up enough to tell my body to breathe 463 times in 6 ¾ hours.[/ul] My blood oxygen sturation, essential for the repairs that occur during sleep, had a mean of 95%, but a minimum of 78% (not good!) and I spent >25% of my sleeping time with a SatO[sub]2[/sub] below 90% My body was not able to rest and make proper repair to itself because of this.
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I give you all this information so that you might understand the gravity of sleep apnea. It can happen to anyone, but it can be corrected and it can be controlled.
If you snore heavily, wake up feeling tired or unrested, no matter how long you’ve been “asleep,” have had people tell you that you stop breathing or gasp in your sleep, or wake up cranky and irritable regularly, ask your doctor about participating in a sleep study.
[sub]*: To understand why this is bad, contrary to popular belief, it is stage 3 & 4 sleep, or delta sleep, that is the “deepest” stage of sleep (not REM) and the most restorative. It is delta sleep that a sleep-deprived person’s brain craves the first and foremost[sup]3[/sup]. [/sub]
Further information and source material:
1: National Heart, Lung and Blood Institute (National Institutes of Health)
2: American Sleep Apnea Association
3: SleepDoctor