Transfusion reaction acute hemolytic vs Transfusion reaction febrile non-hemolytic
How to tell Transfusion reaction acute hemolytic and Transfusion reaction febrile non-hemolytic apart when a board question makes them look alike.
Step 2 CK pairs are in open beta while clinical review finishes. Spot an issue? Tell us.
Presence or absence of hemolysis and hemodynamic instability.
Side by side
During transfusion, fever with hypotension, flank pain, hemoglobinuria, or diffuse bleeding concern indicates acute hemolytic reaction.
Isolated fever and chills without hypotension, pain crisis, or hemolysis markers during or soon after transfusion suggests febrile non-hemolytic reaction.
Recipient antibodies trigger complement-mediated destruction of donor red cells, usually from ABO incompatibility.
Recipient cytokine response to donor leukocytes or stored cytokines causes benign febrile reaction.
Positive direct antiglobulin test, rising plasma free hemoglobin, low haptoglobin, elevated bilirubin, and hemoglobinuria support hemolytic reaction.
Negative hemolysis workup with stable blood pressure and no hemoglobinuria supports febrile non-hemolytic reaction.
The trap
Calling an early hemolytic reaction simple fever can miss DIC and acute kidney injury. Every suspected reaction requires immediate transfusion stop and blood-bank evaluation before deciding it is benign.
The repair move
Next best step: stop the transfusion immediately, keep IV line open with normal saline, recheck patient and unit identifiers, send blood and urine for hemolysis workup including direct antiglobulin test, and provide aggressive supportive care for shock and kidney protection.
Try a free question
CoreTwenty minutes into a red-cell transfusion, a patient develops fever, hypotension, back pain, and hemoglobinuria. What is the most likely diagnosis?
Show answer and explanation
Answer: B. Acute hemolytic transfusion reaction. Hemodynamic instability and hemoglobinuria during transfusion indicate acute hemolytic reaction.
Why the other choices are tempting
- A. Incorrect because febrile non-hemolytic reactions usually lack hypotension and hemolysis findings.
- C. Incorrect because volume overload causes hypertension and pulmonary edema rather than hemoglobinuria.
- D. Incorrect because anaphylaxis causes bronchospasm and urticaria pattern rather than hemolysis profile.
- E. Incorrect because TRALI causes noncardiogenic pulmonary edema but not hemoglobinuria and flank pain.
Flashcards
Tap a card to flip it.
What symptom triad during transfusion should raise concern for acute hemolytic reaction?
Fever with hypotension and flank or back pain, often with hemoglobinuria.
What profile suggests febrile non-hemolytic transfusion reaction instead?
Fever and chills without hypotension, hemoglobinuria, or hemolysis labs.
Quick answers
What is the fastest way to tell Transfusion reaction acute hemolytic from Transfusion reaction febrile non-hemolytic?
Presence or absence of hemolysis and hemodynamic instability.
What is the key clue for Transfusion reaction acute hemolytic?
During transfusion, fever with hypotension, flank pain, hemoglobinuria, or diffuse bleeding concern indicates acute hemolytic reaction.
What is the key clue for Transfusion reaction febrile non-hemolytic?
Isolated fever and chills without hypotension, pain crisis, or hemolysis markers during or soon after transfusion suggests febrile non-hemolytic reaction.
What is the common trap with Transfusion reaction acute hemolytic vs Transfusion reaction febrile non-hemolytic?
Calling an early hemolytic reaction simple fever can miss DIC and acute kidney injury. Every suspected reaction requires immediate transfusion stop and blood-bank evaluation before deciding it is benign.