Doing dialysis generally means doing hemodialysis, which is also known as artificial kidney, refers to the use of machines to replace the function of kidneys to achieve the purpose of treating uremia. Because doing hemodialysis is to lead the patient’s blood out of the body, through the specialized hemodialysis instrument, using the instrument to decompose, separate and expel the toxins of the blood out of the body, so as to treat the body’s excessive and high urea nitrogen, creatinine, water and other toxins, and be able to make the human body’s renal function to return to normal, and at the same time be able to excrete the excessive water and maintain the acid-base balance of the human body. By doing dialysis, it can effectively reduce the concentration of various toxins in the body, thus ensuring the normal functioning of the organism. In our country, many chronic uremia patients rely on dialysis to achieve the purpose of prolonging life and long-term survival.