Overview
Research in Severe Asthma (RISA) Trial
Status:
Completed
Completed
Trial end date:
2006-08-01
2006-08-01
Target enrollment:
0
0
Participant gender:
All
All
Summary
The purpose of this study is to evaluate the safety and efficacy of the Alair System for the treatment of severe refractory asthma. This will be a multicenter, randomized controlled study comparing the effects of treatment with the Alair System to standard drug therapy in patients with severe asthma refractory to standard medication therapy. A total of 30 subjects will be randomized 1:1 to the Alair Group (Medical management + Alair Treatment) OR the Control Group (Medical management only).Phase:
N/AAccepts Healthy Volunteers?
NoDetails
Lead Sponsor:
Asthmatx, Inc.
Boston Scientific Corporation
Criteria
Inclusion Criteria:- Ambulatory adult; age 18-65 years
- Asthma requiring regular maintenance medication that includes high dose inhaled
corticosteroid AND long acting β2 agonist (LABA) with or without other asthma
maintenance medications. Oral prednisone ≤30 mg/day, leukotriene modifiers,
theophylline or other asthma control drugs may be prescribed at the physician's
discretion.
- Pre-bronchodilator forced expiratory volume in one second (FEV1) ≥50% predicted
(patients stabilized on inhaled corticosteroids (ICS) and long acting β2 agonists)
- PC20 < 4 mg/ml per methacholine inhalation test using standardized methods, for
patients with pre-bronchodilator FEV1 ≥60% predicted (or FEV1 > lower limit defined by
individual hospital protocol). PC20 is the provocative concentration of Provocholine®
(a brand of methacholine chloride) resulting in a drop of FEV1 of 20% or more from
Baseline
- Reversible bronchoconstriction during the 12 months prior to enrollment, as
demonstrated by an increase in FEV1 of at least 12% 30 minutes after 4 puffs of
short-acting β2 agonist, for patients with pre-bronchodilator FEV1 < 60% predicted (or
FEV1 < lower limit defined by individual hospital protocol)
- Patient must be symptomatic, despite medication with high dose inhaled corticosteroids
and LABA, by at least one of the following:
1. Use of rescue medication (short-acting β2 agonist) at least 8 of the 14 days
prior to enrollment OR
2. Daytime symptoms at least 10 of the 14 days prior to enrollment
- Non-smoker x 1 year or greater (if former smoker, less than 10 pack years total
smoking history)
- Patient must be suitable for bronchoscopy in the opinion of the investigator or per
hospital guidelines
- Willingness and ability to give written Informed Consent
- Willingness and ability to comply with the study protocol, including requirements for
taking and abstaining from medications
Exclusion Criteria:
- Participation in another clinical trial involving respiratory intervention that could
affect the outcome measures of this study, within 6 weeks prior to randomization.
Patients will be disqualified from the study if they enter another study or fail to
comply with prescribed asthma medications.
- Use of immunosuppressant therapy (e.g., methotrexate).
- Current or recent lower respiratory tract infection (resolved less than 6 weeks from
enrollment testing)
- History of recurrent (no more than three in the last three months) lower respiratory
tract infection requiring antibiotics
- Presence of other respiratory diseases including emphysema, cystic fibrosis, vocal
cord dysfunction, mechanical upper airway obstruction, obstructive sleep apnea,
Churg-Strauss syndrome, cardiac dysfunction, allergic bronchopulmonary aspergillosis
- DLCO (diffusion capacity) < 70% predicted
- Uncontrolled sinus disease
- Uncontrolled gastro-esophageal reflux disease
- Use of implanted electronic device such as a pacemaker or internal cardiac
defibrillator
- Use of external pacemaker
- Significant co-morbid illness such as cancer, renal failure, liver disease or cerebral
vascular disease
- Post-bronchodilator FEV1 of less than 55% predicted
- Known systemic hypersensitivity or contraindication to methacholine chloride or other
parasympathomimetic agents
- Known sensitivity to medications required to perform bronchoscopy, including
lidocaine, atropine, benzodiazepines and opioids
- Use of a systemic b-adrenergic blocking agent
- Other medical criteria.