Age

18–79

Sex

MALE

Healthy volunteers

Not accepted

1. aged 18-79 years, ASA class I-II
2. participants undergoing robot-assisted radical prostatectomy under general anesthesia
3. signed informed consent and volunteered to participate in the experiment

1. urethral stricture, difficulty in inserting catheter or urethral bleeding during catheterization
2. a preexisting bladder disease such as an overactive bladder, bladder outflow obstruction, and neurogenic bladder
3. cognitive impairment or communication disorders
4. severe heart, lung, liver, kidney and immune system diseases
5. confirmed or suspected allergy to this trial drug

Lidocaine Combined With Sufentanil for Preventing Catheter-related Bladder Discomfort