What laboratory value would most likely be expected in a client with hemolytic transfusion reaction?

In a client experiencing a hemolytic transfusion reaction, laboratory values can show various changes due to the rapid destruction of red blood cells and the subsequent response of the body. A key finding during such a reaction is the prolonged prothrombin time (PT) and activated partial thromboplastin time (aPTT). This occurs because hemolysis can lead to an activation of the coagulation cascade, resulting in the consumption of clotting factors, which prolongs these coagulation times.

During a hemolytic transfusion reaction, the immune system reacts to the transfused blood cells, causing the release of certain substances from lysed cells that can influence coagulation. This reaction can trigger disseminated intravascular coagulation (DIC), a serious condition that involves the widespread activation of the clotting process leading to both thrombosis and bleeding. As a result, monitoring PT and aPTT becomes critical in diagnosing and managing the complication of a hemolytic reaction.

The other options do not directly reflect the typical laboratory findings associated with hemolytic transfusion reactions. Elevated white blood cell counts might indicate inflammation or infection but are not specific to this type of reaction. Increased liver enzymes can occur due to other factors but are not a hallmark