This study was designated to investigate the quality of recovery after transurethral bladder resection. Because, patients undergoing transurethral bladder resection are mostly old age, and because of catheter-related bladder discomfort are common after transurethral bladder resection, study on the quality of recovery after transurethral bladder resection seems to be meaningful. In general, sevoflurane is commonly used as an anesthetic agent for general anesthesia of transurethral bladder resection. The purpose of this study is to investigate whether remimazolam is not inferior to sevoflurnane in terms of quality of recovery after transurethral bladder resection.

Inclusion Criteria:

• adult patients aged from 19 years
• Americaln Society of Anesthesiologist's class I, II, and III
• scheduled to undergo elective transurethral bladder resection under general anesthesia

Exclusion Criteria:

• refuse to participate in the study
• cannot read, or sign the consent form (e.g., iliterate, foreigner, eye disease)
• history of allergy to benzodiazepines
• decreased liver, kidney, or heart function
• pregnant women or breastfeeding patients
• history of drug or alcohol abuse
• obesity (body mass index > 30kg/m2)