Patients with an indication of chest tube removal will be randomized to two possible arms: clamping (for 6 hours before removal) or not clamping (immediate removal).~Incidence of 24hour pneumothorax after chest tube removal will be recorded.
Through this randomized controlled clinical trial, we aim to identify whether there is a difference in the incidence of 24 hour pneumothorax after chest tube removal, in two blindly randomized groups of patients: The first group with chest tube clamping 6 hours prior to removal, and the second group there will be no chest tube clamping.~The data will be prospectively collected from patient records from the National Institute of Respiratory Diseases Ismael Cosío Villegas.