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Chronic Refractory Cough: Objective Improvement With Aerodynamic-Focused.

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Breath training significantly reduced chronic cough symptoms and improved aerodynamic measures in patients refractory to medical treatment. This behavioral therapy offers a promising approach for managing persistent cough.

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Area of Science:

  • Pulmonology
  • Behavioral Therapy
  • Speech-Language Pathology

Background:

  • Chronic cough refractory to medical treatment poses a significant clinical challenge.
  • Behavioral therapies show promise, but objective treatment parameters require documentation.

Purpose of the Study:

  • To document objective changes in chronic refractory cough using a breath training protocol.
  • To assess the impact of breath training on aerodynamic parameters and cough severity.

Main Methods:

  • Retrospective chart review of 27 patients with chronic cough (>6 months) refractory to medical treatment.
  • Patients underwent 2-4 sessions of breath training over 6 months, focusing on breathing modification exercises.
  • Aerodynamic parameters (subglottic pressure, airflow rate, laryngeal resistance, phonation time) and Cough Severity Index were measured pre- and post-therapy.

Main Results:

  • Significant improvement in Cough Severity Index (16.74 to 10.04, P<0.001) in 24/27 patients.
  • Increased maximum phonation time (12.00 to 16.38s, P=0.006).
  • Decreased mean estimated subglottic air pressure (7.58 to 6.36 cm H2O, P=0.004) and laryngeal airway resistance (52.97 to 40.64 ppm, P=0.013).

Conclusions:

  • Breath training protocol effectively reduces chronic cough in patients refractory to medical therapies.
  • Objective aerodynamic measures, including subglottic pressure and glottal airway resistance, correlate with patient-reported cough severity.
  • Breath training represents a viable therapeutic option for chronic refractory cough.