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Related Experiment Videos

Capsaicin cough sensitivity in bronchiectasis.

A Torrego1, R A Haque, L T Nguyen

  • 1National Heart and Lung Institute, Imperial College, Dovehouse Street, London SW3 6LY, UK.

Thorax
|April 8, 2006
PubMed
Summary
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Patients with bronchiectasis exhibit heightened cough sensitivity, correlating with symptom severity. This finding suggests incorporating cough severity assessments into routine patient care for improved management of this airway disease.

Area of Science:

  • Pulmonary Medicine
  • Respiratory Physiology

Background:

  • Bronchiectasis is a chronic airway disease defined by persistent cough and sputum production.
  • It is characterized by irreversible bronchial dilatation and inflammation.

Purpose of the Study:

  • To investigate whether patients with bronchiectasis have an increased cough reflex sensitivity.
  • To explore the relationship between cough sensitivity and disease characteristics.

Main Methods:

  • A study compared 22 patients with bronchiectasis to 20 healthy controls.
  • Cough sensitivity was measured using incremental capsaicin inhalation, determining the concentration causing 5 or more coughs (C5).
  • Quality of life, cough symptoms, and HRCT scan data were also recorded.

Main Results:

Related Experiment Videos

  • Bronchiectasis patients demonstrated significantly increased capsaicin sensitivity compared to controls.
  • Capsaicin sensitivity positively correlated with quality of life scores and inversely with total cough symptom scores.
  • Sensitivity was linked to FEV1 in litres but not to disease extent or sputum infection status.

Conclusions:

  • Patients with bronchiectasis possess a hyperresponsive cough reflex.
  • This heightened cough sensitivity directly reflects the severity of their cough symptoms.
  • Measuring cough severity may be a valuable component of health assessments for bronchiectasis patients.