Completed

NCT Number: NCT02889029

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

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.

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Key information

Conditions

Obstructive Airway Disease Lung Diseases Lung Diseases, Obstructive Respiratory Tract Diseases

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

University Hospital Toulouse

Toulouse, CHU de Toulouse, 31059, France

About this study

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.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

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

Treatment and study plan

new 3D device

Device

dedicated tailored stents wrought by 3D computer-assisted conception

Primary outcomes

Change of percentage of procedures conducted without complications at 1 week , 3 months and 6 months

Time frame: 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.

Sponsors and collaborators

Lead sponsor

University Hospital, Toulouse

Other

Registry information

Acronym: DASCAS

Important dates

Study start: 2016
Primary completion: 2019
Study completion: 2020
First posted: Sep 5, 2016
Registry last updated: Jul 22, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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Completed