Postoperative precautions for bladder tumor 1.Regular bladder perfusion Within 24 hours or 1-2 weeks after operation, without bladder irritation and urinary tract infection, and with normal urine routine examination, start perfusion. Don’t drink a lot of water or infusion before perfusion, you can perfuse (piroxicam 30-40mg +5% GS 40-50ml; or mitomycin 20mg +NS 30 ml, etc.). Qiao Baoping, Department of Urology, First Affiliated Hospital of Zhengzhou University Before each instillation, empty the bladder, disinfect the urethral orifice with iodine povidone, insert a disposable urethral catheter of No. F14, inject all the medication (pilobarbital 30 mg + 5% GS 30-40 ml), and inject 10 ml of 5% GS, and inject all the medication in the urethral catheter into the bladder. After clamping the urinary catheter, remove the urinary catheter. Take the left side lying position, right side lying position, prone position, supine position four positions each 10-15 minutes, 1-2 hours after the discharge of the drug. Once a week, a total of 4-8 times; later once a month, a total of 1-2 years. 2.Regular cystoscopy Review cystoscopy every 3 months within one year; review cystoscopy every 4 months after one year. Causes and prevention of bladder cancer The occurrence of bladder cancer is a complex, multi-factorial and multi-step pathological change process, which has both intrinsic genetic factors and extrinsic environmental factors. The two clearer causative risk factors are smoking and long-term exposure to industrial chemicals. Smoking is the most certain risk factor for bladder cancer, about 30%-50% of bladder cancer is caused by smoking, and smoking can increase the risk rate of bladder cancer by 2-4 times, which is directly proportional to the intensity and time of smoking. Chemical carcinogens are the causative factors of bladder cancer, especially aromatic amine compounds, such as 2-naphthylamine and 4-aminobiphenyl, which are widely found in tobacco and various chemical industries. Tobacco metabolites are excreted through urine, and carcinogenic components in urine induce malignant changes in bladder epithelial cells. Life should be regular and postoperative diet of bladder cancer patients should be reasonable 1. No smoking and no alcohol, which is necessary for many cancer patients. It is not only unfavorable for cancer patients, but also extremely unfavorable for normal healthy body. 2. Prohibit smoked, pickled, fried, moldy, spicy and stimulating foods, which are important carcinogens and contain amine nitrite. Avoid coffee, artificial sweeteners and hair dyes. 3. Eat more vitamin-rich fresh vegetables and fruits to supplement all kinds of vitamins and proteins, enhance nutrition and improve body resistance. 4. In addition, drink more water, which can discharge toxins in time and prevent toxins from being retained in the bladder.