Exam 10: Adverse Complications of Transfusions

In what circumstance would a direct antiglobulin test be negative in the presence of a hemolytic process?

Which of the following blood group systems has been implicated in transfusion reactions on the first exposure to incompatible red blood cells?

Antibodies to which blood group system is often implicated in delayed transfusion reactions?

Which of the following transfusion reactions has the highest incidence?

Ten days after the transfusion of 2 units,a patient had a 2 g/dL drop in hemoglobin and was slightly jaundiced.No evidence of bleeding was found.What tests would be helpful in determining whether the patient is experiencing a delayed hemolytic transfusion reaction?

A hemolytic reaction to red blood cells can be caused by which of the following nonimmune mechanisms?

Match the transfusion reaction with the description that best fits. -Graft-versus-host disease

A 44-year-old woman has a hemoglobin level of 6.1 g/dL.White blood cell and platelet counts are within normal levels.The patient is group O D-negative with a negative antibody screen.Crossmatches are compatible.However,15 minutes after the first transfusion is started,she experiences erythema and hives.What type of transfusion reaction is occurring?

Administration of whole blood to a patient with cardiac insufficiency could result in which of the following transfusion reactions?

Match the transfusion reaction with the description that best fits. -Urticarial