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Published on: November 4, 2010
Metered cryospray in patients with chronic bronchitis: a mechanistic randomised controlled study
Christopher Michael Orton1,2,3, James Tonkin1,2,3, Ley Taing Chan1,2,3
1Repiratory Department, Royal Brompton Hospital, London, UK.
Thorax
|July 14, 2026
Summary
Metered cryospray did not reduce goblet cell density in chronic bronchitis patients but improved symptoms and reduced air trapping. This novel treatment shows promise for managing chronic bronchitis effectively.
Area of Science:
- Pulmonology
- Respiratory Medicine
- Medical Device Technology
Background:
- Chronic bronchitis significantly impacts patient morbidity and lung function.
- Novel therapeutic interventions are crucial for managing chronic bronchitis.
- Metered cryospray is an emerging bronchoscopic treatment whose efficacy and mechanism are under investigation.
Purpose of the Study:
- To evaluate the efficacy of metered cryospray in reducing goblet cell density in patients with chronic bronchitis.
- To assess the safety and impact of metered cryospray on symptom burden and lung structure.
Main Methods:
- A 1:1 randomized, blinded, sham-controlled mechanistic trial.
- 15 patients received metered cryospray, and 17 received sham-bronchoscopy.
- Primary outcome: change in goblet cell density at 6 months post-treatment.
Main Results:
- Metered cryospray did not significantly reduce goblet cell density compared to sham control (p=0.49).
- Significant improvements were observed in St. George's Respiratory Questionnaire scores (p=0.022).
- Radiological assessment showed a significant reduction in air trapping (p<0.0001).
Conclusions:
- Metered cryospray did not achieve the primary endpoint of reducing goblet cell density.
- The treatment demonstrated significant improvements in patient-reported symptoms and objective measures of air trapping.
- Metered cryospray is a potentially safe and effective treatment option for chronic bronchitis.
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