Urinary intubation is a common surgical procedure used to help patients urinate. Urinary catheterization should be operated by professional doctors, mainly for preoperative preparation, cleaning, disinfection, catheterization and fixation. 1. Pre-operative assessment: assess the patient’s condition, state of consciousness, vital signs, degree of cooperation, ability to take care of oneself, bladder filling and perineal skin and mucous membrane. 2. Disinfection: The patient is instructed to wash the vulva, use cotton balls with mucosal disinfectant solution to disinfect the vulva from the inside out and from top to bottom, each cotton ball is used only once, and then the vulva is covered with a sterile perforated towel. For men, disinfect the anterior part of the penis with disinfectant solution from the urethral opening outward, and then wrap the penis with a sterile towel to expose the urethral opening. 3. Intubation: The operator stands on the right side of the patient wearing sterile gloves and operates according to the following procedures: ① Hold the penis with the thumb and two fingers of the left hand, and use mucosal disinfectant to wipe and disinfect the urethra several times from the urethral orifice outward in a rotating manner. The female parted the labia minora to reveal the urethral opening, again using a disinfectant cotton ball, from top to bottom to disinfect the urethral opening and labia minora. ② the male penis to lift it and the abdominal wall into an obtuse angle, the right hand will be coated with sterile lubricant catheter slowly inserted into the urethra, the catheter outer end of the hemostatic forceps clamped closed, the opening will be placed in the disinfection of the curved disk, men into about 15 ~ 20cm. women to separate the lips of the labia minora, from the urethral orifice inserted into the 6 ~ 8cm, release the hemostatic forceps, the urine can be discharged. 4. Fixing the urinary catheter: The doctor will fix the urinary catheter on the patient’s inner thigh or buttocks to avoid the catheter falling off. Ureteral intubation should be operated by a professional doctor. After intubation, you should pay attention to drink more water, disinfect the urethral opening regularly, and keep the vulva local hygiene.