Use of a Pressurized Face Mask for Preventing Respiratory Complications After Chest Surgery

Inclusion Criteria: * Undergoing thoracic surgery including resection of lung parenchyma. * To have given signed consent to enter in the study. Exclusion Criteria: Weaning in the first 4h after the intervention end. * Suspected bronchopleural fistula at the admission to the surgical ICU. * Patients with facial problems or a history of intolerance to CPAP masks. * Having significant bullous emphysema defined as the presence of more than 5 contiguous bullae \<2cm or the existence of a pulmonary bulla\> 2 cm or dystrophy bullosa, not in the area to dry and having had a previous pneumothorax. * Known Obstructive Apnea Hypopnea syndrome known or some form of noninvasive ventilation prescribed. * Immunocompromised patients, or having used an immunosuppressor drug at least one month prior to surgery with potential (except corticosteroids administered by inhalation)