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Li F, Li P, Cai Z, Liu X, Li L, Zhang H, Li H, He Y, Ye L, Yan X. Establishment of two canine models of benign airway stenosis and the effect of mitomycin C on airway stenosis. Int J Pediatr Otorhinolaryngol 2022; 159:111205. [PMID: 35700689 DOI: 10.1016/j.ijporl.2022.111205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 05/30/2022] [Accepted: 06/06/2022] [Indexed: 11/16/2022]
Abstract
OBJECTIVES Cuffed endotracheal intubation and stent implantation were employed to simulate two types of benign airway stenosis and further to analysis the different features between them from trachecscopic characteristics, gross anatomy to histopathological changes. In addition, our study explored the therapeutic effect of mitomycin C at different concentrations on granulation tissue caused by stent implantation in order to provide a new therapeutic strategy for clinical treatment of benign airway stenosis. METHODS Twelve beagle dogs were randomly divided into four groups, with three dogs in each group. Group A: Three beagle dogs were intubated through oral trachea after general anesthesia and cuff pressure maintained at 200 mmHg for 24 h. Group B, Group C and Group D: endotracheal coated self-expanding metal stents were placed after general anesthesia under the guidance of bronchoscope. On the Day7 after stent implantation, Group B, as control group, was injected phosphate buffer solution of 1 ml into granulation tissue at the end of stent; Group C was injected mitomycin C of 1 ml at 0.4 mg/ml and Group D was injected mitomycin C of 1 ml at 0.8 mg/ml into granulation tissue at the end of metal airway stent respectively, the same method as Group B. Bronchoscopy was used to observe tracheal lumen on the seventh day, fourteenth day and twenty-first day after modeling and pathological changes were examined on twenty-first day. RESULTS Two models of benign airway stenosis can be established by cuffed endotracheal intubation and stent implantation. There was tracheal rupture in the trachea cartiage ring in the cuffed endotracheal intubation group, but was't in stent implantation group. Histopathological characteristics were different between cuffed endotracheal intubation and stent implantation groups. In stent placement groups, we found that the stenosis degree of mitomycin C at 0.4 mg/ml was approximately 19%-32%, mitomycin C at 0.8 mg/ml was approximately 16%-21% and the control group was approximately 36%-47%. CONCLUSION The two models of canine benign tracheal stenosis induced by cuffed endotracheal intubation and stent implantation are relatively simple, reliable and reproducible and have different characteristics. Mitomycin C could inhibit proliferation of granulation tissue and attenuate the degree of airway stenosis caused by stent implantation.
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Affiliation(s)
- Feng Li
- The First Department of Pulmonary and Critical Care Medicine, The Second Hospital of Hebei Medical University, Shijiazhuang, China; Hebei Key Laboratory of Respiratory Critical Care, Shijiazhuang, China; Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Hebei North University, Zhangjiakou, China
| | - Peipei Li
- The First Department of Pulmonary and Critical Care Medicine, The Second Hospital of Hebei Medical University, Shijiazhuang, China; Hebei Key Laboratory of Respiratory Critical Care, Shijiazhuang, China; Department of Pulmonary and Critical Care Medicine, Hengshui People's Hospital, Hengshui, China
| | - Zhigang Cai
- The First Department of Pulmonary and Critical Care Medicine, The Second Hospital of Hebei Medical University, Shijiazhuang, China; Hebei Key Laboratory of Respiratory Critical Care, Shijiazhuang, China.
| | - Xiaoxu Liu
- The First Department of Pulmonary and Critical Care Medicine, The Second Hospital of Hebei Medical University, Shijiazhuang, China; Hebei Key Laboratory of Respiratory Critical Care, Shijiazhuang, China; The First Department of Pulmonary and Critical Care Medicine, Cangzhou Central Hospital, Cangzhou, China
| | - Linyan Li
- Hebei Key Laboratory of Respiratory Critical Care, Shijiazhuang, China; Department of Infectious Diseases, The Fourth Hospital of Hebei Medical University, Shijiazhuang, China
| | - Huiran Zhang
- The First Department of Pulmonary and Critical Care Medicine, The Second Hospital of Hebei Medical University, Shijiazhuang, China; Hebei Key Laboratory of Respiratory Critical Care, Shijiazhuang, China
| | - Haitao Li
- The First Department of Pulmonary and Critical Care Medicine, The Second Hospital of Hebei Medical University, Shijiazhuang, China; Hebei Key Laboratory of Respiratory Critical Care, Shijiazhuang, China
| | - Yanpeng He
- The First Department of Pulmonary and Critical Care Medicine, The Second Hospital of Hebei Medical University, Shijiazhuang, China; Hebei Key Laboratory of Respiratory Critical Care, Shijiazhuang, China; Department of Pulmonary and Critical Care Medicine, The First Hospital of Qinhuangdao, Qinhuangdao, China
| | - Liyun Ye
- The First Department of Pulmonary and Critical Care Medicine, The Second Hospital of Hebei Medical University, Shijiazhuang, China; Hebei Key Laboratory of Respiratory Critical Care, Shijiazhuang, China
| | - Xixin Yan
- The First Department of Pulmonary and Critical Care Medicine, The Second Hospital of Hebei Medical University, Shijiazhuang, China; Hebei Key Laboratory of Respiratory Critical Care, Shijiazhuang, China
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