The EASE study was a randomised double blind sham controlled study in patients with severe emphysema on best possible treatment. Creation of new airway passages (airway bypass led to short term improvements in quality of life, exercise capacity and lung function in the treated patients.

The Lancet article

EXHALE STENTS: Airway Bypass Procedure

The aim of the EASE (Exhale airway stents for emphysema) trial was to evaluate safety and efficacy of airway bypass in people with severe homogeneous emphysema.

The AIRII study was a randomised double blind sham controlled study in asthma patients.

Bronchial thermoplasty improved quality of life, asthma symptoms and reduced exacerbations.

Effectiveness and Safety of Bronchial Thermoplasty in the Treatment of Severe Asthma