Single Dose Ultibro Breezhaler by Sd-DPI Versus Ipratropium/Salbutamol by Nebulizer in COPD

Rationale: Inhaled bronchodilators, beta-2-agonist or anticholinergic or combinations, can be delivered by several types of devices: dry powder (DPI), pressurized metered dose inhalers (pMDI), and wet nebulizers. Wet nebulization is available for short-acting bronchodilators only, is cumbersome, and, importantly, has never been scientifically been proven to be more efficacious than delivery by the other two methods. Yet many patients are happy with wet nebulization and in many clinics this administration method prevails. The investigators believe that combined long-acting bronchodilators, are more efficacious than combined short acting bronchodilators per nebulizers. Objective: To test the hypothesis that: The combination of the two long-acting bronchodilators indacaterol and glycopyrronium by dry powder inhalation confers a superior improvement compared to nebulisation with ipratropium/salbutamol, when administered as single dose in patients with stable state chronic obstructive pulmonary disease (COPD). Study design: Investigator initiated, randomised, active controlled, cross-over double-blind (and therefore double-dummy), study comparing the effects of single dose indacaterol/glycopyrronium 110/50 Breezhaler® versus single dose ipratropium/salbutamol nebulisation in patients with COPD in stable state Study population: Patients visiting the outpatient clinics or from general practitioner (GP) practices with COPD GOLD stage A-D, and (FEV1) post-bronchodilator FEV1/ forced vital capacity (FVC) \< 70%; post-br FEV1 \< 80%pred. Intervention The investigators will compare the effects of single dose indacaterol/glycopyrronium 110/50 Breezhaler® versus single dose ipratropium/salbutamol nebulisation in patients with COPD in stable state Main study parameters/endpoints: Area under the curve (AUC) from 0 to 6 hours of FEV1 with indacaterol and glycopyrronium, compared to nebulisation with ipratropium/salbutamol Nature and extent of the burden and risks associated w