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Science Forum Index » Medicine Forum » Apnea Triples Dying...
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| ironjustice at (no spam) aol.com... |
 Posted: Fri Aug 01, 2008 5:44 am |
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Guest
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I wonder if this includes their deaths while .. flying .. ?
Is it the .. erythrocytosis / increased red blood cells .. which
kills .. them .. ?
Erythrocytosis and apnea co-exist.
They say the body increases the red blood cells DURING apnea as
opposed .. to .. increased red blood cells PRECEDING .. apnea.
It **precedes** apnea.
Sleep apnea hikes risk of death, UW study finds
Doug Shore — 8/01/2008 9:06 am
A new study conducted by a team of University of Wisconsin researchers
shows that people suffering from severe sleep apnea have three times
the risk of dying due to any cause compared to people without the
disorder.
Sleep apnea is a condition with repeated episodes of breathing pauses
during sleep despite an ongoing effort to breathe. Apnea often occurs
when muscles in the back of throat relax, causing soft tissue to
collapse and temporarily block the air passage.
The study, published in the Aug. 1 issue of Sleep, was led by Dr.
Terry Young, professor of epidemiology at UW-Madison's School of
Medicine and Public Health. The findings are the result of an 18-year
follow-up of 1,522 participants in the Wisconsin Sleep Cohort Study,
which was comprised of a random sample of men and women between the
ages of 30 and 60.
The original participants, who were all state employees, spent one
night at UW's General Clinical Research Center beginning in 1988 to
determine whether they suffered from sleep apnea. Sixty-three of the
participants, or roughly 4 percent, were found to suffer from severe
sleep apnea, experiencing between 30 and 97 apneas per hour. About 76
percent of the subjects had no sleep apnea.
Young's recent findings involved reviewing death records of initial
participants to determine if those suffering from sleep apnea had a
higher mortality rate over the 18-year period. The doctor found that
participants suffering from severe sleep apnea had died at a rate
three times as that of those without the disorder. Eighty of the
original 1,522 participants -- 5.3 percent -- had died as of March 1,
2008.
As part of the study, which was funded by the National Heart, Lung and
Blood Institute, the participants return to UW every four years and
stay overnight for re-evaluation. Young said about 90 percent of the
original participants come back every four years, including many who
have moved away from Wisconsin.
"They have been extraordinary," Young said of the participants.
Young said about 10 percent of adults suffer from at least moderate
sleep apnea, which is characterized by 15 or more breathing pauses per
hour. Someone with a severe form of the disorder experiences 30 or
more breathing pauses per hour.
According to Young, being overweight is the primary risk factor for
developing sleep apnea, and for those already suffering from the
disorder, being overweight can make the condition worse.
People with sleep apnea will sometimes wake up gasping for air,
perhaps feeling as if they are choking. But even those with severe
cases of the disorder may not realize it.
"Most people will not notice their own sleep apnea," said Young.
For many years, the medical community did not consider the importance
of sleep in health, said Young, and the most common symptoms of sleep
apnea, loud snoring and feeling tired during the daytime, even after
sufficient sleep, were too often trivialized by medical practitioners.
"The medical field was largely unaware of the disorder until
recently," Young said. "As a result, not many people suffering from
the disorder were actually diagnosed."
"We really feel that the Wisconsin Sleep Cohort participants helped
discover something important," said Young. "They are pioneers who
slept for science."
For more information on sleep apnea, go to www.sleepfoundation.org.
------------------------
Briefs: Flying may pose risk to sleep apnea sufferers
By Times Staff, Wires
In print: Friday, May 23, 2008
Flying may pose risk to sleep apnea sufferers
People with severe obstructive sleep apnea (OSA) taking airline
flights may have a greater risk from cardiac stress than healthy
people, according to new research.
The scientists compared oxygen levels and breathing by simulating
flight conditions.
"It is normal for the rate of breathing to increase when air pressure
falls,'' said Leigh Seccombe, an Australian scientist.
"We found that (for those with OSA), their breathing intensity
increases at about the same rate as it does in healthy people." But
the physiological stress and demand for oxygen was increased in
people
with OSA.
"The work they do to run the core range of body functions (heart,
lungs, brain) is much greater under cabin conditions.''
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Tom
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