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Related Experiment Videos

Cold and the airways.

J Regnard1

  • 1Laboratoire de Physiologie, Faculté de Médecine, Besançon, France.

International Journal of Sports Medicine
|October 1, 1992
PubMed
Summary
This summary is machine-generated.

Exposure to cold air significantly impacts respiratory health, causing vasoconstriction and potentially leading to conditions like "Eskimo lung" and asthma attacks in susceptible individuals.

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Area of Science:

  • Respiratory Medicine
  • Environmental Physiology

Background:

  • Cold climate exposure triggers diverse physiological and pathological respiratory responses.
  • Pulmonary and tracheobronchial vasculatures are key effectors in cold-induced respiratory changes, alongside airway smooth muscle.

Purpose of the Study:

  • To explore the respiratory system's responses to cold air exposure.
  • To investigate the mechanisms behind cold-induced respiratory conditions and asthma.
  • To highlight the role of mucosal vessels in airway thermal regulation.

Main Methods:

  • Review of existing human and animal experimental data.
  • Analysis of respiratory responses to acute and chronic cold air inhalation.
  • Examination of vascular and airway changes in response to thermal stimuli.

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Main Results:

  • Cold exposure causes pulmonary vasoconstriction, exacerbates conditions like congestive heart failure, and can lead to acute respiratory failure in healthy individuals.
  • Chronic exposure to cold air in athletes results in obstructive lung disease and pulmonary artery thickening ("Eskimo lung").
  • Inhalation of dry air triggers bronchial obstruction in healthy subjects and asthma attacks in asthmatic individuals, linked to airway cooling and mucosal vessel responses.

Conclusions:

  • The vascular system in the airways plays a critical role in maintaining thermal balance.
  • Thermal stimuli, particularly airway cooling via hyperventilation of cold or dry air, are implicated as triggers for asthma.
  • Understanding these responses is crucial for managing respiratory health in cold environments.