Which analyte is usually tested 5-7 hours after a transfusion reaction?

Which analyte is usually tested 5-7 hours after a transfusion reaction?

• A. Albumin
• B. Bilirubin
• C. Hemoglobin
• D. Potassium

Answer: (B)

When a transfusion reaction causes hemolysis, red blood cells are destroyed and heme is released, quickly boosting bilirubin production. The liver converts this heme to bilirubin, and it accumulates in the bloodstream over a few hours. Around five to seven hours after the reaction begins, bilirubin levels commonly rise, making bilirubin the most useful analyte to assess for a hemolytic transfusion reaction at that time. Albumin doesn’t reflect acute hemolysis, and while potassium can increase with cell lysis, it’s not the standard indicator for this timing. Hemoglobin changes can occur too, but bilirubin specifically tracks ongoing red cell destruction and is the most reliable marker in that 5–7 hour window.

When a transfusion reaction causes hemolysis, red blood cells are destroyed and heme is released, quickly boosting bilirubin production. The liver converts this heme to bilirubin, and it accumulates in the bloodstream over a few hours. Around five to seven hours after the reaction begins, bilirubin levels commonly rise, making bilirubin the most useful analyte to assess for a hemolytic transfusion reaction at that time. Albumin doesn’t reflect acute hemolysis, and while potassium can increase with cell lysis, it’s not the standard indicator for this timing. Hemoglobin changes can occur too, but bilirubin specifically tracks ongoing red cell destruction and is the most reliable marker in that 5–7 hour window.