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

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
 
ClinicalTrials.gov Identifier: NCT02889029
Recruitment Status : Active, not recruiting
First Posted : September 5, 2016
Last Update Posted : July 17, 2019
Sponsor:
Information provided by (Responsible Party):
University Hospital, Toulouse

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
Obstructive Airway Disease Device: new 3D device Not Applicable

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.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 10 participants
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Management of Complex Airway Stenoses With Dedicated Tailored Stents Wrought by 3D Computer-assisted Conception
Actual Study Start Date : September 2016
Estimated Primary Completion Date : December 2019
Estimated Study Completion Date : December 2019

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




Primary Outcome Measures :
  1. 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.



Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
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

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02889029


Sponsors and Collaborators
University Hospital, Toulouse
Investigators
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Principal Investigator: Nicolas Guibert, Dr University Hospital, Toulouse

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
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Responsible Party: University Hospital, Toulouse
ClinicalTrials.gov Identifier: NCT02889029    
Other Study ID Numbers: RC31/15/7860
First Posted: September 5, 2016    Key Record Dates
Last Update Posted: July 17, 2019
Last Verified: July 2019
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No
Additional relevant MeSH terms:
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Lung Diseases, Obstructive
Lung Diseases
Respiratory Tract Diseases