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Respiratory failure.

C Roussos1, A Koutsoukou

  • 1Dept of Critical Care, University of Athens Medical School, Evangelismos Hospital, Athens, Greece. croussos@cc.uoa.gr

The European Respiratory Journal. Supplement
|November 19, 2003
PubMed
Summary
This summary is machine-generated.

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Respiratory failure, characterized by hypoxemia or hypercapnia, results from lung or pump issues. Chronic hypercapnic respiratory failure may stem from a "natural wisdom" adaptation to respiratory load, leading to reduced ventilation.

Area of Science:

  • Respiratory Medicine
  • Physiology

Background:

  • Respiratory failure is categorized into lung failure (hypoxemia) and pump failure (hypercapnia).
  • Hypercapnic respiratory failure can be acute or chronic, stemming from various factors including CNS depression, mechanical defects, and respiratory muscle fatigue.

Purpose of the Study:

  • To elucidate the pathophysiological mechanisms underlying hypercapnic respiratory failure, particularly chronic carbon dioxide retention.
  • To explore the
  • natural wisdom
  • hypothesis regarding adaptation to respiratory loads.

Main Methods:

  • The study reviews existing literature and proposes a leading hypothesis based on recent work.
  • The proposed mechanism involves a threshold inspiratory load triggering muscle injury and an adaptive response.

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Main Results:

  • Reduced alveolar ventilation is a common pathophysiological denominator in hypercapnic respiratory failure.
  • The
  • natural wisdom
  • theory suggests a trade-off between maintaining normal gas tensions and avoiding respiratory muscle fatigue.
  • An adaptive response involving cytokine production and modulation of respiratory controllers is hypothesized to cause alveolar hypoventilation and CO2 retention.

Conclusions:

  • Chronic carbon dioxide retention may result from an adaptive response to excessive respiratory load, aimed at preventing muscle damage.
  • This adaptive response, involving cytokine signaling and neuro-modulation, ultimately leads to alveolar hypoventilation.