Management of Complex Airway Stenoses With Dedicated Tailored Stents Wrought by 3D Computer-assisted Conception

Study design: Prospective monocentric feasibility study Arm number or label and arm type: Only one experimental arm Interventions: After signature of a informed consent Collection of clinical data (age, sex, etiology, site and mechanism of the stenosis, previous treatments dyspnea, quality of life (VQ11 questionnaire)) Chest CT-scan without contrast under continuous positive pressure Spirometry (peak flow, FEV1) Computer-assisted modelization of the shape of the prosthesis using 3D reconstruction of CT-scan Machining of the shape in Ertacetal® (AnatomikModeling®) Fabrication and sterilization of the stent in silicon (Sebbin®) Insertion of the stent under rigid bronchoscopy and general anesthesia Clinical follow-up at one week, 3 months and 6 months Chest CT-scan without contrast at 1 week, spirometry at 1 week and 6 months Number of subjects : 10 patients Statistical analysis: For the primary outcome, percentages of procedures conducted without complication at 1 week, 3 months, and 6 months and their confidence interval at 95% and incidences at 1 week, 3 months and 6 months for each complication will be calculated. For secondary outcomes: * Percentages of procedures conducted with improvement of dyspnea (improvement of at least one point of NYHA score) at 1 week, 3 months, and 6 months and their confidence interval at 95% will be calculated. * Percentages of procedures conducted with improvement of quality of life (improvement of at least 10% of VQ11 score) at 1 week, 3 months, and 6 months and their confidence interval at 95% will be calculated. * Percentages of procedures conducted with improvement of functional parameters (improvement of at least 20% of DEP or FEV1) at 1 week and 6 months and their confidence interval at 95% will be calculated. * Percentage of procedures conducted with radiologic congruence of the stent at 1 week and its confidence interval at 95% will be calculated.