Effects of BIS Closed Loop Target Controlled Infusion on Perioperative Inflammatory Response and Prognosis of Elderly Patients Undergoing Laparoscopic Radical Gastrectomy for Gastric Cancer

In this study, elderly patients undergoing laparoscopic radical gastrectomy for gastric cancer were randomly divided into BIS closed circle target controlled infusion (BIS) 55 group and 45 group, and the levels of perioperative inflammatory response indicators IL-6, TNF-α and IL-10 at different depths of anesthesia and sedation were recorded. The duration of stay in anesthesia recovery room, quality of recovery, postoperative pain and postoperative pulmonary complications were observed. Objective To evaluate the feasibility of BIS closed loop target controlled infusion in elderly patients undergoing laparoscopic radical gastrectomy for gastric cancer. Perioperative period is a process of intense stress response, which is mainly manifested by the production and aggregation of inflammatory factors, which adversely affect multiple organs such as brain, heart and lung, and is an important risk factor for increasing postoperative complications and postoperative mortality . Perioperative inflammatory response status has a clear relationship with postoperative recovery of patients, and perioperative anesthesia and sedation depth management and precision anesthesia is one of the most critical links to control the stress response, and appropriate anesthesia and sedation depth control and stress regulation can significantly improve the prognosis of patients . How to reduce the adverse effects of perioperative stress response on patients has been the focus of research and attention in recent years.