The purpose of this study is to find the elderly patients with laparoscopic gastric cancer radical is suitable the BIS closed round target control level of anesthesia depth of sedation, can decrease the elderly laparoscopic gastric cancer radical surgery in patients with perioperative inflammatory reaction, and reduce the incidence of perioperative pulmonary complications such as, for elderly patients with gastric cancer radical perioperative inflammation control to provide the reference and provide guidance for clinical anesthesia work.
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Postoperative complications
Timeframe: Within one week after surgery
mortality rate
Timeframe: Within 30 days after surgery
Serum LEVELS of IL-2, IL-4, IL-6, IL-10, TNF-ɑ, IFN-γ
Timeframe: Within three days of the surgery