Deventilation Dyspnea in COPD Patients Using NIV

Both groups get the same exposures: with measure physiology in both groups by using non-invasive measurement techniques. The techniques we use are Electrical Impedance Tomography to determine degree of hyperinflation. We use Electromyography to analyse respiratory drive. We measure transcutaneous carbon dioxide to assess the effects of non-invasive ventilation. Thereby, we will perform lung function tests.