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The senile lung. Comparison with normal and emphysematous lungs. 2. Functional aspects
E K Verbeken1, M Cauberghs, I Mertens
1Laboratorium voor Pneumologie en Pathologische Ontleedkunde I, Universitaire Ziekenhuizen St. Rafaël, Gasthuisberg, Leuven, Belgium.
Chest
|March 1, 1992
Summary
Senile lungs exhibit enlarged airspaces without wall destruction, impacting lung elasticity. These changes in aging lungs may precede emphysema, highlighting functional shifts from isolated airspace enlargement.
Area of Science:
- Pulmonary Medicine
- Gerontology
- Respiratory Physiology
Background:
- Senile lungs are defined by homogeneous alveolar airspace enlargement.
- This enlargement occurs without fibrosis or destruction of alveolar walls.
Purpose of the Study:
- To investigate the functional characteristics of senile lungs.
- To compare senile lungs with normal and emphysematous lungs.
- To understand the relationship between airspace enlargement and lung elasticity.
Main Methods:
- Functional analysis of excised senile lungs.
- Measurement of minimal air and elastic recoil pressure-volume curves.
- Comparison of lung parameters across normal, senile, and emphysematous groups.
Main Results:
- Senile lungs showed increased minimal air and a leftward shift in elastic recoil curves.
- Maximal expiratory volumes and flows remained normal in senile lungs.
- A correlation was found between recoil pressures and mean linear intercept (Lm), and between forced expiratory volume in 1 s and bronchiolar characteristics.
Conclusions:
- Airspace enlargement in senile lungs can precede emphysema.
- Isolated airspace enlargement is responsible for altered lung elasticity.
- Senile lungs serve as a model for functional changes due to airspace enlargement.