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[Pathologic bronchial secretions and mucociliary transport]
Annales De L'Anesthesiologie Francaise
|January 1, 1980
Summary
Abnormal bronchial secretions in chronic hypersecretory states disrupt mucociliary clearance. Biochemical and rheological analysis aids in assessing these changes and guiding treatment for improved mucus transport.
Area of Science:
- Pulmonary Medicine
- Biochemistry
- Rheology
Background:
- Bronchial secretions, primarily mucins and proteins, possess crucial rheological properties for ciliary transport.
- Chronic hypersecretory conditions disrupt the balance of these components, altering secretion composition.
Purpose of the Study:
- To investigate the biochemical and rheological changes in bronchial secretions during chronic hypersecretory states.
- To evaluate the impact of these alterations on mucociliary function and clearance.
- To explore methods for assessing these abnormalities and guiding treatment.
Main Methods:
- Biochemical and rheological analysis of sputum.
- In vitro assessment of transport rate in animal models.
- In vivo study of mucociliary clearance using radio-isotopic techniques.
Main Results:
- Chronic hypersecretion alters mucin synthesis and decreases secretory proteins (e.g., IgAs) while increasing plasma proteins (e.g., albumin).
- These changes lead to hyperviscosity and hypoelasticity of secretions.
- Impaired mucociliary drainage and increased secretion retention are observed.
Conclusions:
- Biochemical and rheological abnormalities in bronchial secretions significantly impair mucociliary function.
- Investigative methods provide valuable data for treatment indications and efficacy assessment.
- Targeting these secretion abnormalities can improve mucociliary transport in chronic conditions.