The Effect of Oxycodone Hydrochloride on CRBD After TURBT Under General Anesthesia

Inclusion Criteria: * More than 18 years old; * ASA I - III; * Plan to perform transurethral resection of bladder tumor under general anesthesia; ( * Agree to participate in this study and sign the informed consent form. Exclusion Criteria: * Refuse to participate in this study; * Emergency surgery; * Catheter was indwelling before operation; * Taking opioids for a long time before operation; * Previous history of schizophrenia, epilepsy, Parkinson's disease or myasthenia gravis; * Unable to communicate due to coma, severe dementia or language disorder before operation; * Critical condition (ASA grade ≥ IV before operation); Severe renal function damage (requiring renal replacement therapy); Severe liver function damage (child Pugh grade C); Acute stage of chronic obstructive pulmonary disease, severe asthma, severe pulmonary heart disease; * History of opioid allergy.