Opioid-free Anesthesia Protocol for Neurosurgical Supratentorial Tumor Resection

Intraoperative analgesia will be administered with conventional opioid drugs such as sufentanil and remifentanil.

The patients will be administered with an opioid-free strategy during surgery. The investigator will use esketamine, dexmetopidine, and local anesthesia to control perioperative pain.