Evaluation of Renal Perfusion With NIRS in Laparoscopic Surgery

Renal NIRS monitoring will be performed in patients undergoing laparoscopic cholecystectomy surgery. Age, gender, BMI, ASA scores, hemogblin/hematocrit values, intraoperative hemodynamic parameters, NIRS values, N-GAL (preoperative, 2nd hour and 24th hour), urea/creatinine (preoperative, postoperative 24th hour) values of the patients will be recorded. . Before the general anesthesia is performed, the renal tissues of the patients will be visualized by ultrasound, the skin-renal cortex distances will be measured, and suitable patients will be included in the study. Basal rSO2 values will be recorded by placing NIRS probes under the 10-11. intercostal space in the bilateral posterior lateral flank region.