Comparison of the effects of accurate anesthesia management and the traditional anesthetic technique on postoperative pain levels and cognitive function: a single-center, large sample, double-blind, randomized, controlled trial

INTERVENTION: Group T:Traditional anesthesia;Group A:accurate anesthesia management; CONDITION: Heart disease, gastrointestinal cancer, liver and kidney placeholder PRIMARY OUTCOME: VAS Score;Postoperative morphine requirements;Cognitive Scale score;Postoperative nausea and vomiting;Protein S100; SECONDARY OUTCOME: The incidence of adverse cardiovascular events;Pulmonary complication; INCLUSION CRITERIA: 1) Patients only with general anesthesia after elective cardiac and non‐cardiac surgery; 2) after IV PCA analgesia; 3) Both men and women, aged 16‐75 years old; 4) cardiac function I‐III class, ASA I‐III level; 5) patients agreed to participate in the study and signed the informed consent.