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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.
Immune-mediated hemolytic reactions caused by IgG, Rh, Kell, Duffy, or other non-ABO antibodies typically result in extravascular sequestration, shortened survival of transfused red cells, and relatively mild clinical reactions. Acute hemolytic transfusion reactions due to immune hemolysis may occur in patients who have no antibodies detectable ...
Hemolytic transfusion reactions are a possible complication from red blood cell transfusions. Hemolysis refers to the lysis (rupture) of red blood cells, and the resulting leakage of their contents. Hemolytic reactions may be immune or non-immune mediated. Immune-mediated hemolytic reactions, such as DHTR, represent a type of alloimmunity.
Treatment of the condition is specific to the cause of hemolysis, but intense phototherapy and exchange transfusion can be used to help the patient excrete accumulated bilirubin. [11] Complications related to hemolytic jaundice include hyperbilirubinemia and chronic bilirubin encephalopathy, which may be deadly without proper treatment. [12] [13]
Symptomatic treatment can be given by blood transfusion, if there is marked anemia. A positive Coombs test is a relative contraindication to transfuse the patient. In cold hemolytic anemia there is advantage in transfusing warmed blood. In severe immune-related hemolytic anemia, steroid therapy is sometimes necessary.
Kidd antibodies are dangerous as they are capable of causing severe acute hemolytic transfusion reactions. They are unique in that they are capable of dropping to low or even undetectable levels after several months following an exposure. [5] Thus, on pre-transfusion testing, an anti-Jka or -Jkb may go undetected.
[3] An example of complement dependent type II hypersensitivity is an acute hemolytic transfusion reaction following transfusion of ABO incompatible blood. [4] Preformed antibody (predominantly IgM) against donor red cell antigens not found in an individual of a particular blood group (e.g. anti-A IgM in an individual with blood group B), bind to the donor red cell surface and lead to rapid ...
There are many different varieties of abnormal reactions to blood transfusion. Among these, a potentially life-threatening reaction is known as a hemolytic transfusion reaction. This is an immune mediated reaction where recipient antibodies attack donor red blood cell antigen(s), causing hemolysis of donor cells.