Comparison of Remimazolam-based MAC With Inhalation General Anesthesia Under the Guidance of an ANI Monitor During TURB

In remimazolam-based MAC group, anesthesia will be induced with remimazolam and spontaneous breathing will be maintained. The dose of remimazolam and remifentanil will be adjusted according to the patient state index (PSI) and the analgesia nociception index(ANI). In inhalation general anesthesia group, anesthesia will be induced with propofol and rocuronium and maintained with sevoflurane and remifentanil. Mechanical ventilation will be maintained by inserting laryngeal mask airway (LMA) or endotracheal tube. The doses of sevoflurane and remifentanil will be adjusted according to the patient state index (PSI) and the analgesia nociception index(ANI). Surgery cost, anesthesia cost, patient and surgeon's satisfaction score, pain score, PONV score and the incidence of hypotension and hypoxemia will be compared.