Abstract:

Aim. We aimed to investigate the effect of monitoring the depth of anesthesia with bispectral Index (BIS) on consumption of total intravenous anesthetic agent, recovery criteria and to be aware. Methods. ASA physical status I-II, between 20-60 age, 60 patients planned to undergoing cholecystectomy under general anesthesia were enrolled to study. Patients were randomly divided into 2 groups. Patients monitored by bispectral index monitoring (BIS) were classified as Group BIS and patients monitored by hemodynamic parameters were classified as group control. Induction of anesthesia in both groups was performed with 1 mg/kg/min remifentanil. In Group Control, propofol was adjusted to 2 mg/kg, in group BIS, propofol was adjusted to BIS 40-60. All patients were curarized with rocuronyum 0.6 mg kg. Maintenance of anesthesia was caried out with propofol and remifentanil. Total propofol consumption and time to extubation and to be aware were also recorded. Results. Demographic data were similar between groups. In BIS group, propofol consumption (p<0.05) were significantly lower. Time to extubation was shorter in the BIS group (p<0.05) differences were not found between the groups in terms of being aware. Both groups were similar in terms of heart rate, mean arterial pressure, and length of hospital stay. Conclusion. In patients undergoing laparoscopic cholecystectomy, it is enough to make anesthesia titration by hemodynamic parameters. However, we concluded that monitoring by the BIS may help to prevent the use of more anesthetic agents and provide faster recovery.

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