1.The intraoperative risk is bleeding, or even total nephrectomy. 2, the most important postoperative risk is bleeding, including bleeding outside the trauma, a large amount of blood visible in the drainage tube; bleeding in the urinary tract, bleeding in the ureter, no bleeding outside the trauma; severe bleeding requires access embolization, or open surgery to stop bleeding; 3, leakage of urine, if the collection system is cut during surgery, poor postoperative healing can lead to leakage of urine from the trauma, the need to perform ureteral stent placement on the affected side, and leave the ureter and drainage tube in place. 4. Others include paralysis of the skin above and below the operative area, pain and discomfort, etc. As the saying goes, high benefit and high risk, to have more kidneys, you have to take more risks, otherwise the risk of total nephrectomy is much smaller. But think about more than one kidney, more functions, a kidney replacement will cost so much money, and it is not your own, and you have to eat anti-rejection drugs every day.