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[Chest wall mechanics in obstructive lung disease]
1First Department of Internal Medicine, Tokyo Women's Medical College, Japan.
Nihon Kyobu Shikkan Gakkai Zasshi
|March 1, 1991
Summary
Overinflated lungs in obstructive lung disease affect chest wall mechanics. The diaphragm and rib cage movement changes, impacting breathing function in conditions like pulmonary emphysema.
Area of Science:
- Respiratory physiology
- Biomechanics of breathing
Context:
- Obstructive lung diseases, such as pulmonary emphysema, lead to lung overinflation.
- Chest wall mechanics, including rib cage and diaphragm function, are crucial for effective respiration.
Purpose:
- To investigate the impact of lung overinflation on the biomechanical function of the rib cage and diaphragm.
- To elucidate the factors influencing the inward motion of the lower lateral rib cage during lung overinflation.
Summary:
- Lung overinflation in obstructive lung disease alters chest wall function.
- The lower lateral rib cage's inward motion is influenced by diaphragm force, abdominal compliance, and diaphragm angle.
- Diaphragm shape changes, specifically a decreased dome radius, occur at high lung volumes in healthy individuals and emphysema patients.
Impact:
- Provides insights into the complex interplay of respiratory muscles and chest wall structures during lung overinflation.
- Contributes to understanding breathing difficulties in obstructive lung diseases.
- Highlights the role of biomechanical alterations in respiratory impairment.