Abstract
Aim. The aim of this study was to examine the effect of protocol of weaning from mechanical ventilation on the gastrointestinal function in people undergoing CABG.
Background. The most common problems after cardiac surgery in the intensive care unit are change in vital signs, respiratory problems, unsuccessful separation from mechanical ventilation, and gastrointestinal problems. Due to the numerous effects that gastrointestinal problems have on the patient after cardiac surgery and also the economic burden that these complications impose on the patient and the health care system, choosing the best technique to prevent and control these problems is critical for the health care team.
Method. The present study was a randomized clinical trial conducted on 100 people undergoing CABG. They were allocated to control and experimental group based on permuted block randomization. The control group received routine way and experimental group received protocol of weaning. The groups  were compared in terms of nausea and vomiting, the time of beginning oral diet, defecation and bowel sounds before weaning 2, 6, and 12 hours after weaning from mechanical ventilation. Data were analyzed In SPSS version 23 using chi-square, Mann–Whitney U and Fisher tests.
Findings. In experimental group, there was a faster onset of bowel sounds and movements and earlier beginning of oral diet.
Conclusion. Patients who were under the protocol of weaning from mechanical ventilation had better gastrointestinal functional status compared to those who were under routine weaning.