Anästhesie und klinische Forschung
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Comparison of Anaesthetic Depth by Bispectral Index Score in Trendelenburg and Reverse Trendelenburg Position in Elective Open Cholecystectomy under General Anaesthesia

Anupam Chakrabarti, Joydeep Choudhury, Ranjit Reang, Surajit Paul*

Introduction: Awareness in anaesthesia is an unpleasant complication which may even lead to Post Traumatic Stress Disorder (PTSD) and for that monitoring of depth of anaesthesia is a major concern now-a-days. Now days Bispectral Index Score (BIS) is widely used to monitor the depth of anaesthesia. Change in patient position during surgery under general anaesthesia can cause change in BIS score and hence changes the depth of anaesthesia. Here we have studied the change in anaesthetic depth during different position of patient who is undergoing open cholecystectomy under general anaesthesia by using BIS monitoring system.

Methodology: It is a cross sectional observational study conducted in surgery OT of AGMC and GBP Hospital. Total 40 numbers of patients were included in the study that has given consent for the study and fulfilled the inclusion criteria. Induction and maintenance of anaesthesia were done as per institutional protocol and changes in Heart Rate, Blood Pressure, RR, BIS Score were measured in regular time interval and time of Sweating or tearing of the patient was noted if any during supine, trendelenberg and reverse trendelenberg position. Data were recorded in Microsoft excel and analyzed in SPSS 15.0 version and t-test applied for testing significance of different variables between two groups.

Results: Changes in patient position during surgery under general anaesthesia significantly changes BIS score and thereby depth of anaesthesia. Trendelenurg position increases MAP, HR, sweating and increase BIS value.