Matrix Biology of Tracheobronchomalacia and Tracheal Stenosis

Beth Israel Lahey Health

Status: Completed

Conditions: Tracheal Stenosis; Tracheobronchomalacia

Study type: Observational

Funder types: Other

Identifiers

NCT00705848

2007P000336

Details and patient eligibility

About

It is not clearly understood what causes tracheobronchomalacia (weakening of the windpipe and airways) or tracheal stenosis (narrowing of the windpipe). We plan to take biopsies (small pieces of tissue) and brushings (to collect the cells that form the lining of the airway) from the airways of patients with these diseases and analyze these samples in a laboratory to try and determine the mechanism of disease. We will compare the results with that of patients with normal airways.

Full description

• Controlled pilot study to determine whether there exists, at a molecular level, a predisposition to the development of tracheomalacia and subglottic stenosis. Thirty patients will be divided into 2 groups of 20 patients (study patients) and 10 patients (control group). Both groups will undergo bronchoscopy and airway biopsy
• The study is a pilot study to evaluate alterations in the airway matrix, growth factor levels, and vascular structures.in patients with tracheobronchomalacia and subglottic stenosis
• Bronchoscopies will be performed in the West Procedure UnitPulmonary Special Procedures Unit or in the operating room (depending on the clinical indication and patient scheduling) at the BIDMC after informed consent is obtained.
• Patients will receive topical upper airway anesthesia with lidocaine and intravenous conscious sedation with fentanyl and midazolam as per standard of care
• Biopsies will be performed according to standard protocols.
• Biopsies will be performed: 2 samples will be sent for pathology as part of clinical care and 2-3 samples used for research analysis.

Enrollment: 16 patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• (study group): age ≥ 18, willingness and ability to give informed consent, clinical indication for bronchoscopy and biopsy, prior bronchoscopic diagnosis of tracheobronchomalacia, prior bronchoscopic diagnosis of subglottic stenosis (either idiopathic or post-intubation), and smoking cessation for ≥ 4 months. There is no gender or racial restriction. Pregnant women will not be included in the study because of the potential for hypoxemia (especially fetal) and prolongation of the procedure if complications arise. Patients must have family/friends to drive them home following the procedure.
• (control group): age ≥ 18, willingness and ability to give informed consent, clinical indication for bronchoscopy and biopsy, no prior diagnosis of any airway disease of any etiology, and smoking cessation for ≥ 4 months. There is no gender or racial restriction. Pregnant women will not be included in the study because of the potential for hypoxemia (especially fetal) and prolongation of the procedure if complications arise. Patients must have family/friends to drive them home following the procedure.

Exclusion criteria

• (study group): pre-existing airway disorders other than tracheobronchomalacia or subglottic stenosis, etiology of subglottic stenosis other than idiopathic or post-intubation, pulmonary vascular disease, inability to tolerate intravenous conscious sedation.
• (control group): any pre-existing airway disorder, pulmonary vascular disease, and inability to tolerate intravenous conscious sedation.

Trial design

16 participants in 3 patient groups

1

Description:

10 patients with tracheobronchomalacia

2

Description:

10 patients with tracheal stenosis

3

Description:

10 patients with normal airways (no known airway diseases)