Effect of Opioid-free Anesthesia on Sleep Quality, Cognitive Function and Recovery Quality After General Anesthesia in Elderly Patients

opioid free group: After infusion of a loading dose of dexmedetomidine, intravenous midazolam 2mg, propofol 2mg kg-1, esketamine 0.5 mg kg-1, rocuronium 0.6-1mg kg-1, and 3min after endotracheal intubation. Intravenous continuous infusion of propofol, esketamine and dexmedetomidine hydrochloride mixture (esketamine 50mg + dexmedetomidine hydrochloride 150 ug + 0.9% saline 50ml in the same 50ml syringe) 0.1ml kg-1 h-1-0.2 ml kg-1 h-1 (equivalent to esketamine 0.1-0.2mg kg-1 h-1; Dexmedetomidine hydrochloride 0.3-0.6 μ g kg-1 h-1) maintains a BIS value between 40-60, 10-20mg / time was added as appropriate.

Intravenous midazolam 2mg, propofol 2mg kg-1, sufentanyl 0.3-0.5 μ g kg-1, rocuronium 0.6-1mg kg-1,3min before endotracheal intubation. After successful endotracheal intubation, continuous intravenous infusion of propofol and remifentanil was started to maintain BIS values between 40-60, and rocuronium 10-20mg / time as appropriate. After the start of surgery, 10-20 μ g of sufentanil was added according to blood pressure and heart rate. At the end of the operation, 5mg and 50mg were injected before the end of the operation, and propofol and remifentanil were stopped at the end of the operation