Creatinine of 707umol/L or more requires the administration of hemodialysis. Dialysis is mainly for patients with uremia, and when assessing kidney function, it is mainly based on creatinine. If creatinine exceeds 707umol/L, this time suggests that the patient has entered the uremic phase and needs to be given hemodialysis treatment, but this is not absolute. Although creatinine does not reach this standard, some patients have heavy gastrointestinal symptoms, such as recurrent nausea and vomiting, or acidosis, with a significant decrease in carbon dioxide binding capacity and pH, or hyperkalemia, with potassium greater than 6.5 mmol/L, or a heavy water load, with complications such as heart failure and cerebral edema, when patients must also be given This means that the need for hemodialysis needs to be judged comprehensively, not by creatinine alone. Some patients with creatinine of 707umol/L or more, but without the above mentioned complications, may not be given hemodialysis for the time being.