Evaluation of respiratory exchange ratio (RER) for predicting postoperative outcomes in elderly patients undergoing oncological resection for gastrointestinal malignancies - A prospective cohort study.

[ 13 , 14 ] In our study, we found that the subgroup that sustained postoperative complications exhibited an increasing trend in RER in the intraoperative course.

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There was a decreasing trend in ScVO 2 values throughout the surgical course in the group with complications, though it never attained statistical significance.

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