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Manometric Abnormalities in Patients With and Without Chronic Cough.

WayAnne Watson1, Ethan Simmons2, Adebimpe Adebowale2

  • 1Department of Otolaryngology - Head and Neck Surgery, Loma Linda University Health, United States.

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|August 5, 2024
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Summary

Chronic cough may be linked to subtle upper esophageal sphincter (UES) dysfunction, potentially involving vagal hypersensitivity. Further manometry studies are recommended to explore this connection.

Keywords:
Chronic coughEsophageal motilityHigh-resolution manometry (HRM)Upper esophageal sphincterUpper esophageal sphincter functionVagal hypersensitivity

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Area of Science:

  • Gastroenterology
  • Otolaryngology
  • Neurology

Background:

  • Chronic cough (CC) is a common condition with multifactorial causes.
  • Vagal hypersensitivity is a proposed mechanism in some CC cases.
  • Esophageal motility, particularly upper esophageal sphincter (UES) function, is under-investigated in CC.

Purpose of the Study:

  • To investigate the relationship between chronic cough and baseline esophageal motility.
  • To assess upper esophageal sphincter (UES) function in patients with and without chronic cough using high-resolution manometry.

Main Methods:

  • Retrospective analysis of patients undergoing dysphagia workup.
  • Categorization into chronic cough (CC) or control groups based on symptoms.
  • High-resolution esophageal manometry to evaluate UES motility parameters.

Main Results:

  • 62.5% of the cohort presented with chronic cough.
  • No significant demographic differences between cough and control groups.
  • Significantly longer UES relaxation duration in the chronic cough group (734 ms vs. 582 ms, p=0.03).
  • Laryngopharyngeal reflux (LPR) was a significant predictor of chronic cough (OR 74.04, p=0.010).

Conclusions:

  • Subtle alterations in UES function may be present in patients with chronic cough.
  • Findings suggest a potential role for vagal hypersensitivity in chronic cough.
  • Further manometric studies are warranted to explore UES dysfunction and chronic cough link.