Sleep apnea occurs when breathing stops for brief periods of time while a person is sleeping. It can last for 10-30 seconds, and may occur up to 20-30 times per hour. During one night of sleep, this can cause up to 400 episodes of interrupted breathing.

Blocked Airway
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There are three types of respiratory events:

  • Obstructive apnea—caused by a temporary, partial, or complete blockage of the airway
  • Central apnea—caused by a temporary failure to make an effort to breathe
  • Mixed apnea—a combination of the first two types