EASE Trial: Exhale Airway Stents for Emphysema

Broncus Medical

Status and phase: Unknown; Phase 3

Conditions: Emphysema

Treatments: Device: Sham control; Device: Exhale® Drug-Eluting Stent

Study type: Interventional

Funder types: Industry

Identifiers

NCT00391612

Protocol 30

Details and patient eligibility

About

This is an international clinical research study evaluating the safety and effectiveness of a new procedure called airway bypass. The goal of this research is to see if airway bypass can relieve hyperinflation (overfilling) of the lungs, thereby improving lung function and reducing shortness of breath in patients with severe homogeneous (diffuse) emphysema. "EASE" stands for Exhale Airway Stents for Emphysema.

Full description

Over 3 million people in the United States and tens of millions more throughout the world live with emphysema, a chronic, progressive, irreversible disease of the lungs. The hallmark of emphysema is hyperinflation of the lungs -- air is trapped in the lungs and cannot escape, causing the lungs to become larger and larger. This makes it difficult to breathe and dyspnea (shortness of breath) is the result.

The airway bypass procedure is performed using a bronchoscope with the patient under anesthesia. Very small passageways are created between the damaged lung tissue and the larger breathing passages (airways). Small stents are inserted to keep the new pathways from closing. These pathways could potentially provide a way for the trapped air to escape when the patient exhales. If the amount of air trapped in the lungs is reduced then it should be easier for the person to breathe.

The EASE study will compare the effects of Exhale Drug-Eluting Stents in patients to a sham-control group of patients who do not receive the stents. Two out of three (2/3) of the participants in the trial will be in the airway bypass group, or "treatment" group. Participants in the treatment group will undergo the airway bypass procedure with up to six drug-eluting stents implanted in their lungs, creating the passageways for the trapped air to escape. A smaller group - one out of three (1/3) participants - will be the "control" group. The control group will have bronchoscopy, but passages will not be made and stents will not be implanted.

Participants will need to return to the study center four times during the year for follow-up visits and tests. All participants will be told which group they were in when they come back for a follow-up visit one year after the procedure. Participants in the control group will be finished with the trial after one year. Participants in the treatment group will have a follow-up visit once a year for the next four years to monitor the longer term effects of the airway bypass procedure. This is why the end date of the trial is listed as 2012.

Enrollment: 450 estimated patients

Sex: All

Ages: 35+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. High resolution computed tomography (CT) scan evidence of homogeneous emphysema.
2. Stopped smoking at least 8 weeks before entering the trial.
3. Post-bronchodilator RV/TLC ≥ 0.65.
4. Post-bronchodilator Forced Expiratory Volume (FEV1) ≤ 50% or FEV1 < 1 liter.
5. Marked dyspnea, scoring ≥ 2 on the modified Medical Research Council scale of 0-4.
6. Patient has undergone supervised pulmonary rehabilitation of 16-20 sessions over 6-10 weeks.

Exclusion criteria

1. Change in FEV1 > 20% pre- and post- bronchodilator measurements or > 200 ml if post-bronchodilator FEV1 < 1 liter.
2. Respiratory infections requiring 3 or more hospitalizations in past year.
3. Inability to walk > 140 meters (150 yards) in 6 minutes.
4. Previous lung volume reduction surgery (LVRS) or lobectomy.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

---

450 participants in 2 patient groups

2

Sham Comparator group

Description:

subject receives optimal medical management, supervised pulmonary rehabilitation therapy and undergoes bronchoscopy but no stents are placed

Treatment:

Device: Sham control

1

Experimental group

Description:

subject receives optimal medical management, supervised pulmonary rehabilitation therapy and undergoes bronchoscopy during which up to six Exhale drug-eluting stents are placed in the lungs

Treatment:

Device: Exhale® Drug-Eluting Stent