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Antibodies against Kidd antigens may be difficult to detect because of significant variability in their molecular features, and weak in vitro expression. They have been reported to cause severe immediate or delayed hemolytic transfusion reactions, [6] with anti-Jk antibodies responsible for 13 of 44 cases of DHTR reported in the UK during 2021. [7]
In crossmatching, a prospective transfusion recipient's plasma is added to the donor red blood cells and observed for agglutination (or hemolysis) to detect antibodies that could cause transfusion reactions. [3]: 722–5 Blood group antibodies occur in two major forms: immunoglobulin M (IgM) and immunoglobulin G (IgG). Antibodies that are ...
Kidd antibodies are often capable of binding complement and causing intravascular hemolysis. More often, however, Kidd antibodies cause acute extravascular hemolysis. [7] They are a notorious cause of delayed hemolytic transfusion reactions, and may occur up to a week after transfusion in some instances.
Since these antibodies sometimes destroy red blood cells they can cause anemia; this test can help clarify the condition. The indirect Coombs test detects antibodies that are floating freely in the blood. [1] These antibodies could act against certain red blood cells; the test can be carried out to diagnose reactions to a blood transfusion. [1]
An acute hemolytic transfusion reaction (AHTR), also called immediate hemolytic transfusion reaction, is a life-threatening reaction to receiving a blood transfusion. AHTRs occur within 24 hours of the transfusion and can be triggered by a few milliliters of blood. The reaction is triggered by host antibodies destroying donor red blood cells.
This antibody-antigen reaction can be detected through visible clumping or destruction of the red blood cells, or by reaction with anti-human globulin. Along with blood typing of the donor and recipient and screening for unexpected blood group antibodies , cross-matching is one of a series of steps in pre-transfusion testing.
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