Examination of Ventavis (Iloprost) Inhalation Behavior Using the I-Neb AAD System in Patients With Pulmonary Arterial Hypertension When Switching the Iloprost Nebulizer Solution for Inhalation From 10 μg/mL (V10) to 20 μg/mL (V20)

The VENTASWITCH study will be a local, prospective and retrospective, observational, case-crossover study. Data are collected and downloaded from the I-Neb AAD (Adaptive Aerosol Delivery) System. Two data collection periods are planned: period one; data collection from the last 3 months using Ventavis (Iloprost) 10 μg/mL (V10) before the index date of switching to Ventavis (Iloprost) 20 μg/mL (V20) (retrospective part) and period two; data collection for 3 months using V20 from index date (prospective part).