How often the bedside hemodialysis treatment should be done needs to be assessed according to the patient’s renal function, urine recovery and condition, and there is no fixed time interval. Bedside blood purification is a treatment mode in which blood is drawn out from the body and continuously and slowly removed from water, toxins, inflammatory mediators, etc. through bedside hemodialysis machine, and then the blood is returned to the patient. It is mainly applied to acute kidney injury with serious complications such as hypotension, hyperkalemia, heart failure, etc. In addition, for people with dysfunction of heart, brain, lungs, liver and other vital organs or serious infections, bedside hemodialysis has the effect of maintaining the balance of the body’s internal environment and removing inflammatory mediators. When bedside hemodialysis is used in the treatment of acute kidney injury, the treatment can be stopped when renal function and urine volume recover, without hypotension, heart failure, hyperkalemia, etc. and the change of condition can be observed. When used in the treatment of severe pancreatitis, sepsis, etc., the treatment can be stopped when the patient has no fever, the inflammatory indexes decrease, and the circulatory function and internal environment are stable. Therefore, there is no specific treatment interval for bedside purification therapy. Diseases treated with bedside blood purification generally belong to critical illnesses, and such patients need to consult regular hospitals in time, and the specific treatment needs to comply with the advice of specialists, and if there is any discomfort after the treatment, they need to contact the doctor in time to avoid the adverse consequences.