The method of fast urine holding: 1, if there is no gastrointestinal dysfunction, you can drink a lot of water in a short period of time to increase the filtration of the kidneys and quickly produce urine, such as drinking a lot of water within half an hour about 1000-1200ml to achieve the purpose of fast urine holding. 2, if there is gastrointestinal dysfunction, patients can not take water orally, it is recommended that intravenous fluids to achieve the purpose of fast urine holding 3.It is also possible to take diuretics orally or use diuretics intravenously, such as oral tachyphylaxis 1 tablet immediately, or intravenous tachyphylaxis (furosemide injection) 10mg, which can also produce urine quickly after immediate injection. 4.If patients cannot take oral or intravenous input because of various contraindications, indwelling catheters can also be used, and 200-250ml can be injected into the catheter 200-250ml of sterile saline is quickly instilled inside the catheter to achieve the purpose of holding urine.