FAT TONGUE LINKED TO SLEEP APNEA RISK
Obese adults with a significantly larger
tongue and higher percentage of fat are more likely to develop obstructive
sleep apnea than others, says a study.
Common warning signs for sleep apnea include snoring and
choking, gasping, or silent breathing pauses during sleep.
Obese adults with sleep apnea had significantly greater tongue
volumes, tongue fat and percentage of tongue fat than obese controls without
sleep apneea, the findings showed.
"This is the first study to show that fat deposits are increased
in the tongue of obese patients with obstructive sleep apnea," said
principal investigator Richard Schwab, a professor at University of
Pennsylvania Medical Center in Philadelphia, US.
Further analysis found that tongue fat percentage in participants
with sleep apnea was site-specific, with increased fat toward the base of the
tongue in the retroglossal region
"Tongue size is one of the physical
features that should be evaluated by a physician when screening obese patients
to determine their risk for obstructive sleep apnea," said Timothy
Morgenthaler, president, American Academy of Sleep Medicine.
The study involved 90 obese adults with sleep apnea and 31 obese
controls without sleep apnea.
All participants underwent high resolution upper airway magnetic
resonance imaging (MRI).
In addition to enlarging the size of the tongue, increased
tongue fat may impair the functioning of the muscles that attach the tongue to
the bone, preventing these muscles from positioning the tongue away from the
airway, the authors proposed.
The study appeared in the journal Sleep.
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