Objective  To evaluate the efficacy and safety of the silicone stent for treatment of three common benign central airway stenosis. Methods  We retrospectively reviewed 40 patients with benign airway stenosis who were treated with a Dumon silicone stent at Affiliated Hospital of Guizhou Medical University between November 2019 to October 2023, including 14 cases of tracheobronchial tuberculosis (TBTB) stenosis, 14 cases of stenosis after tracheal intubation,and 12 cases of stenosis after tracheotomy. The clinical data and information on bronchoscopic interventional procedures and related complications were collected and analyzed, for evaluating the short-term efficacy, long-term efficacy and stent-related complications. Results  The 40 patients were successfully implanted of silicone stents for 48 times totally. The mMRC score, KPS score, blood oxygen saturation and the diameter of the narrowest airway were significantly improved (P<0.05) after the implantation of silicone stents in all patients. Patients in TBTB group achieved inferior efficacy than those in the other two groups (P<0.05), while there was no significant therapeutic effect between tracheal intubation and tracheotomy groups (P>0.05). The main complications after the implantation of silicone stents were granulation hyperplasia, sputum retention and stent displacement. There were higher incidence rates of granulation hyperplasia and sputum retention in the TBTB group compared with the tracheal intubation and tracheotomy groups (P<0.05 ), while there was no statistically significant difference in incidence rates of granulation hyperplasia and sputum retention between the last two groups. Meanwhile, there was no significant difference in the proportion of stent displacement among the three groups.Conclusions  The efficacy and safety were satisfied in the treatment of the three common benign central airway stenosis,with a recommendation for the treatment of refractory benign airway stenosis. However, the treatment effect of the TBTB group is inferior to that of the tracheal intubation and tracheotomy groups, with higher rates of obvious granulation hyperplasia and sputum retention simultaneously. More detailed follow-up management was recommended for TBTB patients implanted with silicone stents to avoid the development of stent-related minor complications into serious complications with a worse prognosis.

Citation： SU Jiang, WENG Taoping, ZHANG Xianming. A controlled study of the silicone stent for treatment of three common benign central airway stenosis. Chinese Journal of Respiratory and Critical Care Medicine, 2024, 23(4): 231-236. doi: 10.7507/1671-6205.202312035 Copy