1, the concept of clean catheterization technology Clean catheterization (intermittent catheterization) refers to the catheterization method without indwelling catheter carried out by non-medical personnel (patient’s family members or companions), in order to reduce the patient’s dependence on medical personnel and improve the patient’s independence of life, and is mainly applicable to the upper motor nerve source syndrome or other nerve paralysis of patients (clear consciousness and active cooperation), who are unable to urinate on their own or whose urinary output is not sufficiently voluntary (residual urine >80-100ml). The patient (clear mind and active cooperation). 2.Operating procedure: wash the patient’s perineum with soap or cleansing solution, the operator washes his hands three times with soap, inserts the catheter into the urethra with his hand and pushes it in slowly until the urine is discharged from the catheter, the male patient pays attention to the urethral orifice towards the abdominal direction in order to avoid the damage of the urethral isthmus, and the lubricant may be applied on the outside of the catheter before insertion in order to reduce the insertion resistance, and the female patient may use a small mirror to face the pubic area, and spreads the labia majora and minora with one hand to expose the urethral orifice. Female patients can use a small mirror to the pubic area, one hand to separate the labia majora and minora to expose the urethral opening, one hand to insert the catheter, immediately after the completion of catheterization, the catheter will be removed (each time to export the urine is generally about 400ml is appropriate) 3. Strictly control the water intake and exit training Timing and quantitative drinking water and timed urinary system is a variety of bladder training based on the measures (1) the amount of drinking water per day to control the 1,500-2,000ml; (2) the time to drink water at the same time as the three meals, drinking water of 400ML each, including soup, liquids, etc., and the time to drink water. Including soup, fluid and other water, in addition to 200ml of water at 10am, 4pm, 8pm each day; (3) Each meal should not be too salty, thirst to drink a few mouthfuls of water; (4) Catheterization every 4-6 hours, each time catheterization of the bladder capacity does not exceed 500ml.