Effect of laparoscopic bariatric surgery on cerebral oxygenation

Objectives: Bariatric surgery methods are an important piece of morbid obesity treatment. In this research; we investigated the effects of laparoscopic bariatric surgery on rSO2, which is measured by using cerebral oxymeter, during reverse trendelenburg position, carbon dioxide insuflation and pneumoperitonium under general anesthesia. Material and Methods:After the patients’ and Cumhuriyet University Ethics Committee’s approval are taken; 40 voluntary, ASA I-III bariatric surgery patients at the age of 18-60 years were taken into the research. Hemodynamic parameters and rSO2 values were recorded at every 5 minutes of the operation, immediately after anesthesia induction (T1), at the starting of CO2 insuflation (T2), at 10th (T3), 20th (T4) and 30th (T5) minute of pneumoperitonium (T3), at 5th (T6) and 10th (T7) minute of positioning the patient into reverse trendelenburg, after positioning the patient into supine position at the end of the surgery (T8) and after extubation (T9). Results: When we compare the rSO2 values which were measured at different times, the difference was significant. When the measurements were compared as in double; differences between basal and T1, T2, T8 and difference between T1 and T9 were significant and differences between the other values were insignificant. In our research; there was a statistically increase in rSO2 after induction, at the start of CO2 insuflation and at 10th minute of positioning into reverse trendelenburg when compared to basal value. There was a decrease in rSO2 values that measured after extubation compared to values that measured after induction. Cerebral desaturation was not observed in any patient during the operation. Conclusion: It was seen that there was no significant difference in terms of cerebral oxygen saturation of the pneumoperitoneum and reverse trendelenburg position applied in limited number of patients undergoing bariatric surgery under general anesthesia. Surgery position was hemodynamically well-tolerated by the patients and the changes on rSO2 have parallels with hemodynamic changes. © 2019 by Türkiye Klinikleri.