Nerve Block Anesthesia Combined With Sedative Anesthesia Versus General Anesthesia in Surgery for CSDH

Patients in the nerve block anesthesia combined with sedative anesthesia group will first receive cranial nerve blocks under standard monitoring. At the same time, intravenous dexmedetomidine infusion is started for sedation at a rate of 2-4ug/kg for 10 minutes, followed by a continuous infusion of 0.5-1ug/kg/h until the Richmond Agitation-Sedation Scale (RASS) of -3.

Patients will be induced with propofol or etomidate, sufentanil , rocuronium or cisatracurium .