Renal Replacement Therapy (RRT) is a medical treatment used to replace the function of the kidneys in patients with kidney failure. It helps remove waste products, excess fluids, and toxins from the blood, which the kidneys can no longer filter effectively. RRT can be performed through various methods, including hemodialysis, peritoneal dialysis, and kidney transplantation. Hemodialysis involves using a machine to filter blood outside the body, while peritoneal dialysis uses the lining of the abdomen to filter blood internally. Kidney transplantation is a surgical procedure that involves replacing a failing kidney with a healthy one from a donor. RRT is essential for maintaining health and quality of life in individuals with severe kidney dysfunction.