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OSA pathophysiology: a contemporary update.

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Obstructive sleep apnoea (OSA) involves four mechanisms. Precision sleep medicine aims to improve treatment by targeting non-anatomic factors beyond airway collapsibility.

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Area of Science:

  • Sleep Medicine
  • Respiratory Physiology

Background:

  • Obstructive sleep apnoea (OSA) is characterized by recurrent upper airway obstruction during sleep.
  • Current treatments like CPAP and OAT primarily address airway collapsibility, a common but not sole cause of OSA.
  • A significant portion of OSA patients exhibit poor tolerance or response to these established therapies.

Purpose of the Study:

  • To review the four primary pathophysiologic mechanisms underlying OSA.
  • To explore the potential of 'precision sleep medicine' in developing targeted treatments.
  • To discuss implications for current and future OSA therapeutic strategies.

Main Methods:

  • Review of existing literature on OSA pathophysiology.
  • Analysis of established and emerging treatment modalities.
  • Discussion of predisposing factors and their link to mechanisms.

Main Results:

  • OSA is driven by airway collapsibility, ventilatory instability, impaired muscle response, and low arousal threshold.
  • Anatomic therapies target collapsibility, but non-anatomic mechanisms are crucial for many patients.
  • Precision medicine offers potential for tailored treatments based on individual pathophysiologic profiles.

Conclusions:

  • Understanding the diverse mechanisms of OSA is key to advancing treatment.
  • Precision sleep medicine holds promise for improving OSA management by addressing non-anatomic factors.
  • Future research should focus on developing and validating targeted therapies for specific OSA phenotypes.