Long-term efficacy and safety of the Dumon stent for benign tracheal stenosis: a meta-analysis

BACKGROUND: The short-term efficacy of Dumon stent has been well demonstrated. Across years, however, due to insufficient sample size and absent of the randomized controlled trial, no reliable conclusion could be reach for Dumon stent’s long-term efficacy. So, we conducted the first meta-analysis to evaluate the long-term efficacy and safety of the Dumon stent for benign tracheal stenosis. METHODS: Data on related trials were obtained by doing a literature search in PubMed, Web of Science and Cochrane Library. Random-effect and fixed-effect models were used to calculate the efficacy and incidence of complication of Dumon stent placement. RESULTS: A total of 395 patients from 8 studies were included in this study, revealing that the stability rate was 41.12% (95% CI, 34.85–48.52%) of Dumon stenting. Further, a curative rate of 40.74% (95% CI, 34.92–47.53%), and efficacy of 75.49% (95% CI, 70.89–80.39%) were obtained from this study. Analysis of the incidence of complications indicated 25.04% of migration (95% CI, 17.52–35.79%), 15.66% granulation (95% CI, 9.39–26.11%) and 23.82% of mucus retention 23.82% (95% CI, 13.77–41.20%). CONCLUSIONS: Dumon stent has a moderate efficacy for treating benign tracheal stenosis with approximately 20% incidence of complication, regular bronchoscopy follow-up should be conducted. Thus, further research is required to modified Dumon stenting.