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Background Both peripheral nerve blocks with sedation or general anesthesia can be used for total knee replacement surgery. Objectives We compared these anesthetic techniques on the postoperative quality of recovery early in elderly patients. Materials and methods In our study, 213 patients who were ≥65 years old and undergoing total knee replacement were randomized to peripheral nerve blocks (PNBs) – lumbar plexus and sciatic – with propofol sedation, or general anesthesia with combined propofol and remifentanil. Blocks were performed using nerve stimulation and 0.35% ropivacaine. All patients received postoperative multimodal analgesia. Postoperative recovery was assessed at 15 minutes, 40 minutes, 1 day, 3 days, and 7 days after surgery, with the Postoperative Quality of Recovery Scale, in physiological, nociceptive, emotive, modified activities of daily living, modified cognitive, and overall patient perspective domains. Results Intraoperative blood pressure and heart rate were more stable with PNBs (P |