Renal failure is divided into acute renal failure and chronic renal failure, acute renal failure patients find the cause, remove the cause, creatinine is easy to recover, especially in early and middle stage patients, creatinine is easy to recover, specific dialysis indicators are as follows: 1, some patients with the disease, creatinine up to 707μmol / L, sometimes patients will appear at the same time urine volume reduction, or other serious state; 2, acute renal failure is called acute kidney injury that AKI. At this time, there will be infection, stress, such as rhabdomyolysis, and other serious disorders in the body, which is also an indication for acute dialysis; 3. or more, and also metabolic acidosis. If the acid-base balance in the patient’s body is disturbed and the pH value is less than 7.15, this is a sign of severe metabolic acidosis; 5. If conservative treatment for acute pulmonary edema is ineffective, if acute heart failure occurs and excessive water cannot be expelled, or if some patients have severe pericarditis or severe encephalopathy, these are all indications for dialysis.