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Related Experiment Videos

[Cough provocation test in asthmatic children].

T Yokoyama1, H Mochizuki, M Shigeta

  • 1Department of Pediatrics, School of Medicine, Gunma University.

Arerugi = [Allergy]
|December 1, 1990
PubMed
Summary
This summary is machine-generated.

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The combination of low pH and high osmolarity in inhaled aerosols effectively triggers cough receptors in children with bronchial asthma. Neither pH nor osmolarity alone significantly induces coughing, highlighting their synergistic effect.

Area of Science:

  • Respiratory Medicine
  • Physiology

Context:

  • Bronchial asthma affects children's respiratory health.
  • Cough reflex is a critical protective mechanism.
  • Understanding cough triggers is vital for asthma management.

Purpose:

  • To investigate the impact of varying pH and osmolarity on cough receptor sensitivity in pediatric asthma.
  • To determine if pH or osmolarity alone or in combination induces coughing.

Summary:

  • Aerosols with different pH (low, neutral, high) and osmolarity (hypo, iso, hyper) were inhaled by 37 children with asthma.
  • Low pH combined with hyperosmolarity most effectively induced coughing (76% of subjects).
  • Low pH and hypo-osmolarity induced coughing in 8% of subjects, while other combinations had minimal effect.

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Impact:

  • Findings suggest that the combined effect of pH and osmolarity is crucial for inducing cough.
  • This research provides insights into the mechanisms of cough reflex in asthma.
  • Results may inform the development of targeted therapies or environmental controls for asthma patients.