The hemodialysis ultrafiltration volume refers to the amount of water removed each time hemodialysis is performed. For patients with uremia, renal replacement therapy is needed to remove excess water and metabolic waste from the body for the purpose of improving life treatment and prolonging survival, and hemodialysis is the most common type of renal replacement therapy. During dialysis, salt and water intake should be controlled to avoid causing excessive weight gain, because the higher the ultrafiltration is the heavier the burden on the heart. It is also necessary to pay attention to the prevention and treatment of colds and regular follow-up check-ups at the hospital to monitor changes in the condition.