Comparing the Effect of Open and Closed Endotracheal Suctioning on Patient's Hemodynamic Factors after Coronary Artery Bypass Grafting under Mechanical Ventilation

Endotracheal suctioning in patients after coronary artery bypass grafting and under mechanical ventilation can be performed to remove endotracheal secretions with two open and closed methods. The aim of this study was to compare the effect of open and closed endotracheal suctioning on hemodynamic factors of patients after coronary artery bypass grafting under mechanical ventilation. This study is a single-blind clinical trial which was done in the intensive care unit of open heart surgery of Imam Reza Hospital of Mashhad on 130 patients after coronary artery bypass grafting under mechanical ventilation who met the criteria of the study in 2013. Subjects were randomly divided into two open and closed suctioning groups with two-stage method after convenience sampling method. Mean arterial pressure and heart rate were compared at baseline, immediately after suctioning, and at one minute interval after suctioning for five minutes between the two groups. For data analysis, repeated measures ANOVA, independent T and paired T tests were used through SPSS 16 software. Heart rate and mean arterial pressure did not change significantly between the two groups during and after open and closed suction system. No significant difference observed with regards to heart rhythm in both suction system groups as well. Changes in mean arterial pressure, heart rate and heart rhythm in patients with coronary artery bypass grafting under open and closed suctioning are the same and one system could not be preferred over the other.