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Pathophysiology of chronic obstructive pulmonary disease
1Department of Medicine, St. Elizabeth's Medical Center of Boston, Massachusetts, USA.
Chest Surgery Clinics of North America
|November 1, 1995
Summary
Emphysema, a chronic obstructive pulmonary disease, causes increased work of breathing due to airflow obstruction and lung hyperinflation. Surgical lung volume reduction may improve symptoms by addressing these physiological changes.
Area of Science:
- Pulmonary Medicine
- Respiratory Physiology
Background:
- Emphysema, a component of chronic obstructive pulmonary disease (COPD), frequently presents with bullae.
- Pathophysiology involves airflow obstruction and lung/chest hyperinflation.
- Increased ventilatory demand leads to elevated work of breathing in emphysema patients.
Purpose of the Study:
- To review the adaptive and maladaptive consequences of increased work of breathing in emphysema.
- To provide a rationale for the potential efficacy of surgical lung volume reduction.
Main Methods:
- Literature review of physiological changes in emphysema.
- Analysis of mechanisms underlying increased work of breathing.
- Exploration of the theoretical basis for surgical intervention.
Main Results:
- Patients with emphysema experience significant increases in the work of breathing.
- Adaptive responses can become maladaptive over time.
- Surgical resection of hyperinflated lung segments is proposed as a therapeutic strategy.
Conclusions:
- Understanding the pathophysiology of emphysema is crucial for developing effective treatments.
- Surgical lung volume reduction may offer a viable option for managing severe emphysema by reducing hyperinflation and work of breathing.