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Related Experiment Videos

Factors affecting tracheobronchial mucociliary transport.

M Lippmann, R E Albert, D B Yeates

    Inhaled Particles
    |September 1, 1975
    PubMed
    Summary

    Mucus transport rates in humans and donkeys were measured. Environmental factors like temperature and smoking, along with autonomic nervous system drugs, significantly altered mucus clearance, impacting respiratory health.

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    Talanta·2021

    Area of Science:

    • Respiratory Physiology
    • Pharmacology
    • Environmental Health

    Background:

    • Mucus transport is crucial for airway clearance.
    • Factors influencing mucus transport require further investigation.

    Purpose of the Study:

    • To investigate in vivo mucus transport rates in humans and donkeys.
    • To determine the effects of temperature, environmental toxicants, and autonomic drugs on mucus clearance.

    Main Methods:

    • External measurement of insoluble monodisperse gamma-tagged aerosol clearance.
    • Studied changes in clearance rates in individual subjects under various conditions.

    Main Results:

    • Increased ambient temperature accelerated clearance in donkeys.
    • Smoking significantly reduced bronchial clearance duration in both species.
    • Autonomic drugs demonstrated varied effects: atropine slowed, while isoproterenol and epinephrine accelerated clearance in humans. Methacholine increased transport in donkeys.
    • HCN exposure caused only mild, transient slowing.
    • Tap water aerosol inhalation increased bronchial clearance in humans.

    Conclusions:

    • Mucus transport is sensitive to environmental factors and autonomic nervous system modulation.
    • Findings have implications for understanding respiratory defense mechanisms and the impact of pollutants and medications.

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