What is the Role of Preoperative Breathing Exercises in Reducing Postoperative Atelectasis after CABG?

摘要

Background: Atelectasis and hypoxemia are frequently reported after coronary artery bypassgraft surgery (CABG). Some studies confirm the benefits of breathing exercises on pulmonarycomplications, but the efficacy of preoperative breathing exercises in patients undergoing CABG iscontroversial. In this study, the effect of preoperative breathing exercises on the incidence of atelectasisand hypoxemia in patients candidate for CABG was examined.Method: In a single-blinded randomized clinical trial, 100 patients who were undergoing coronaryartery bypass graft surgery were randomly allocated into two groups of experimental and control,each consisted of 50 patients. Before the operation, experimental group patients were enrolled in aprotocol including deep breathing, cough and incentive spirometer. In the control group, hospital routinephysiotherapy was implemented. All the patients received the hospital routine physiotherapyonce a day for 2 to 3 minutes in the first four days postoperatively. Arterial blood gases and atelectasiswere compared between groups.Results: There was no significant difference between groups in terms of atelectasis and hypoxemia(p Value>0.05).Conclusion: Preoperative breathing exercise does not reduce pulmonary complications in patientsundergoing CABG.