DASCAS: Management of Complex Airway Stenoses With Dedicated Tailored Stents Wrought by 3D Computer-assisted Conception
Study Details
Study Description
Brief Summary
Management of complex airway stenoses with dedicated tailored stents wrought by 3D computer-assisted conception
Dedicated Airway Stents for Central Airway Stenoses
DASCAS
Toulouse University Hospital is the sponsor of this research.
This research will be conducted with the support of AnatomikModeling and ADERSPOT
-
Background: Tracheobronchial stent are devices designed to manage central airway stenoses of various origins. Their shape and sizes are however not suitable for stenosis of complex anatomy.
-
Purpose: The investigators propose to test the feasibility and safety of treating complex airway stenoses with dedicated tailored stents wrought by 3D computer-assisted conception
Abstract: Central airway obstruction is currently managed with non-personalized stents, which are usually efficient but lead to severe and potentially lethal complications in 10% of cases (stent migration, obstructive granuloma, perforation, hemoptysis). These stents seem particularly unsuited for anatomically complex stenosis.
Dedicated airway stents (wrought and tailored by 3D computer-assisted conception based on 3D chest CT-scan), by fitting perfectly tracheal or bronchial anatomy, should dramatically improve the tolerance and safety of such prostheses.
This first feasibility study, dedicated to patients suffering from anatomically complex stenosis will test the safety of treating patients with these new approach. It should lead to larger studies evaluating these new types of stents in larger indications.
After 3D computer-assisted modelization of airways, a virtual prosthesis and its shape are designed and the shape of the stent is wrought by 3D-machining by AnatomikModeling®. The stent is then build and sterilized by Sebbin® and inserted during rigid bronchoscopy on the same terms as pre-existing models.
Close follow up is then conducted, including clinical evaluation after one week, three and six months; spirometry at one week and 6 months and chest CT-scan at one week.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
|
N/A |
Detailed Description
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.
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Experimental: new 3D device dedicated tailored stents wrought by 3D computer-assisted conception |
Device: new 3D device
dedicated tailored stents wrought by 3D computer-assisted conception
|
Outcome Measures
Primary Outcome Measures
- Change of percentage of procedures conducted without complications at 1 week , 3 months and 6 months [Change of percentage of procedures conducted without complications at 1 week, 3 months and 6 months]
percentages of procedures conducted without complication at 1 week, 3 months and 6 month and their confidence interval at 95% and incidences at 1 week, 3 months and 6 months for each complication will be calculated.
Eligibility Criteria
Criteria
Inclusion Criteria:
-
Age > 18 years
-
Signature of the informed consent form
-
Patient with a complex upper airway stenosis .
-
Symptomatic stenosis ( Dyspnea > NYHA II , cough, PEF < 50%)
-
Stenosis whose complex anatomy does not allow the establishment of a currently available stent on the market: the assessment of the experts ( consensus decision between 3 bronchoscopistes of interventional endoscopy service) or after failure of one or several models.
-
Affiliated with a social security scheme
Exclusion Criteria:
-
Indication of implementation of emergency aid : signs of acute respiratory distress , PEF < 20 % predicted , SpO2 oxygen saturation <90 % on room air
-
Contraindication to rigid bronchoscopy (severe coagulation disorders not correct )
-
Patient under legal protection system
-
Pregnancy
-
Breastfeeding
Contacts and Locations
Locations
No locations specified.Sponsors and Collaborators
- University Hospital, Toulouse
Investigators
- Principal Investigator: Nicolas Guibert, Dr, University Hospital, Toulouse
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- RC31/15/7860