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Role of polysomnography (PSG)?

What is the role of polysomnography (PSG)?

The PSG is the gold standard test for diagnosis of sleep disorders. The patient is admitted overnight in a sleep laboratory under the care of a sleep technologist.  Various monitors are connected to the patient and they continuously record among others:

  • Duration and stage of sleep depth
  • Blood pressure and heart rate
  • Oxygenation levels
  • Apnoeic episodes
  • Muscle tone
  • Chest movements
  • Periodic leg movements
  • Loudness of snoring

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