This friend of yours could be experiencing obstructive sleep apnea or "OSA." What happens is this:
Even in healthy people, the back of the throat relaxes during sleep,
but in most cases it does not present a problem. With some
there is so much relaxation that there is a bit of reduction in air
flow and it produces a snoring sound--many people snore. But in a
select group of people, there is complete blockage of airflow for a
period of time-you will see the chest cave in like the person is
sucking but not getting in any air. Then the obstruction suddenly
is relieved and there is a snort, grunt, loud snoring sound and the
airway opens, the person starts, awakens slightly and breathing appears
normal again. Then the cycle repeats itself, sometimes many times
during the night. This is a very dangerous condition because
while the airflow is cut off the oxygen level can drop significantly to
a lifethreatening level! She should be evaluated by a physician
who specializes in sleep disorders so that an overnight sleep test can
be scheduled. If this is not what you've observed, let me know!
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