Removal of Chest Drains in Post Coronary Artery Bypass Graft Patients: Do Various Phases of Respiration Make a Difference?

Abstract

This study aimed to find out the role of respiratory phase during which pleural drain is removed in the occurrence of post removal post drain removal pneumothorax. 291 patients were allocated into four different groups as follows: 72 patients in end-expiratory group (P group) in which recurrent insignificant pneumothorax occurred in 6 patients. 75 patients were allocated in Valsalva maneuver after full inspiration group (Q group), In which recurrent insignificant pneumothorax occurred in 8 patients. 73 patients were assigned in Valsalva maneuver after full expiration group (R group) in which recurrent insignificant pneumothorax occurred in 7 patients and recurrent significant pneumothorax occurred in 2 patients in this group. and finally, 71 patients were allocated in end-inspiratory group (S group) in which recurrent insignificant pneumothorax occurred in 5 patients.