Noninfectious Complications of Blood Transfusion

Excerpt

Despite advancements in blood safety, transfusions still carry risks, including noninfectious complications such as febrile reactions, acute lung injury, allergic responses, hemolytic reactions, volume and iron overload, and hyperkalemia—with patients receiving multiple transfusions carrying the highest risk. Classification of transfusion reactions begins with the timing of onset. Acute transfusion reactions occur during or within 24 hours of a transfusion, and the presenting symptoms range from mild fever, chills, and rash to severe complications such as respiratory distress, hemoglobinuria, high fever, loss of consciousness, or death. Alternatively, delayed hemolytic transfusion reactions occur in previously transfused patients with undetectable antibodies that become reactive upon reexposure to specific antigens, leading to red blood cell destruction. This reaction is particularly significant in patients with sickle cell disease, where severe hemolysis can occur, sometimes progressing to hyperhemolysis syndrome.

Clinicians must be vigilant in recognizing and managing transfusion reactions, distinguishing between those that are potentially life-threatening and those that are non-life-threatening. Life-threatening transfusion reactions include transfusion-related acute lung injury, transfusion-associated circulatory overload, acute hemolytic transfusion reactions, and anaphylaxis. These conditions require immediate intervention and can significantly contribute to transfusion-related mortality. Non-life-threatening reactions, while more common, still require clinical attention. Allergic transfusion reactions, febrile nonhemolytic transfusion reactions, and hypotensive transfusion reactions generally have milder presentations and are managed symptomatically. Several modifications and specialized blood products like leukoreduction, irradiation, and frozen and washed red blood cells are available as preventative strategies to reduce the risk of transfusion reactions.

When clinicians suspect a transfusion reaction, they must immediately stop the transfusion and verify the blood unit information against the patient’s details to ensure the correct blood product was given to the correct patient. The remaining blood products are then typically returned to the blood bank with a freshly collected blood sample from the patient, and a transfusion reaction evaluation ensues. Further management depends on the underlying cause. Proper clinical management, monitoring, and adherence to transfusion protocols help mitigate these complications.