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Evaluating the Feasibility and Reliability of Using Handheld Nebulizers to Conduct Cough Sensitivity Testing With Citric Acid

StatusRecruiting
PhaseNot applicable
Started
View on ClinicalTrials.gov ↗

Record History

  1. Start date changed from estimate of Jun 5, 2026 to Jul 15, 2026v5
  2. Recruitment opened
    • Study sites: 0 to 1
    • Start date: May 26, 2026 to Jun 5, 2026
    v4
  3. Start date: May 16, 2026 to May 26, 2026v3
  4. Primary completion date: Feb 2027 to Feb 1, 2027
    • Study completion date: Feb 2027 to Feb 28, 2027
    • Start date: May 2026 to May 16, 2026
    v2
  5. Study First Submitted
  • Stopped: an ongoing trial was terminated, suspended or withdrawn.
  • Notable: the trial’s plan changed such as a big move in its timeline or size, a new primary endpoint, sponsor or phase, or recruiting opened or resumed.
  • Minor: routine progress and housekeeping, such as sites added or enrollment closed.
Objective cough reflex sensitivity testing is typically restricted to specialized research laboratories due to reliance on expensive dosimeter-controlled aerosol delivery systems. This study evaluates the feasibility and reliability of a low-cost alternative method using a handheld nebulizer for citric acid cough challenge testing. Healthy adult participants will complete cough reflex sensitivity testing using both a standard dosimeter-controlled nebulizer system (Cosmed QuarkSpiro) and a handheld nebulizer (DeVilbiss 45). The study will compare cough threshold outcomes between methods to determine whether handheld nebulizer-based testing produces comparable and reproducible measurements.
Trial Details
NCT Number NCT07531901
Lead Sponsor University of Montana
Collaborators: National Institute of General Medical Sciences (NIGMS)
Conditions
(from sponsor)		 Cough Reflex Sensitivity
Enrollment 10 participants
Start Date
Primary Completion (estimated)
Study Completion (estimated)
Updated on ClinicalTrials.gov