The 200th patient who received blood type incompatible kidney transplant is a 59-year-old woman who has been on peritoneal dialysis since nine years ago. Although her blood type was different from her daughter, who got her kidneys with type O, fortunately, her antibody retention strength for type A blood was 1:128, which was only half the normal level (1:256). In other words, there are relatively few antibodies that cause rejection after transplantation. A month before the transplant, the medical team injected “Mabthera,” an antibody-producing inhibitor in the blood. She then removed her own plasma containing antibodies by taking the blood outside, and performed plasma exchange six times, one of the main ingredients of the plasma, such as albumin or other people’s plasma, which is suitable for blood type, to lower the antibody factor to below 1:16. Plasma is a transparent neutral liquid excluding red blood cells, white blood cells, and platelets, and serves to transport nutrients, hormones, antibodies, and wastes and maintain osmotic pressure and body temperature. He said that even patients with high antibody levels, or high antibody levels, will see little difference in survival rate if the potency is reduced by increasing the number of plasma exchanges.