Sleep Apnoea, Causes why it occurs.

 A cessation of breaking for more than 10 seconds

 Causes:-

  • recurrent collapse of the upper airways leading to disturbed sleep
  • Loss of muscle tone in pharynx as the patient relaxes during sleep ( obstructive sleep apnoea) 
  • Obesity or enlarged tonsils or adenoids. 
  • Abnormal central nervous system control of breathing ( central sleep apnoea) 
  • Restrictive disorders of chest wall e.g Scoliosis or ankylosis spondylosis
  • Pulmonary hypertension
  • Respiratory or heart failure depends in severe cases. 

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