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Difficulty: MediumHematology and Oncology

Match each clinical presentation of a suspected blood transfusion complication with its most likely diagnosis.

  • A patient develops fevers, chills, and a transient temperature elevation 2 hours after a blood transfusion, with stable vital signs and no evidence of hemolysis.Febrile non-hemolytic transfusion reaction
  • A patient develops acute dyspnea, severe hypoxemia, and bilateral pulmonary infiltrates 4 hours after receiving fresh frozen plasma, with normal central venous pressure.Transfusion-related acute lung injury (TRALI)
  • A patient with a history of reduced ejection fraction develops acute dyspnea, hypertension, tachycardia, and jugular venous distention shortly after receiving 2 units of packed red blood cells.Transfusion-associated circulatory overload (TACO)
  • A patient immediately develops flank pain, fever, tachycardia, hypotension, and dark urine shortly after the initiation of a packed red blood cell transfusion.Acute hemolytic transfusion reaction

Answer

The presentations map to Febrile non-hemolytic transfusion reaction, TRALI, TACO, and Acute hemolytic transfusion reaction respectively based on the presence of hemolysis, respiratory compromise, and volume status.
Each clinical presentation contains classic distinguishing features for a specific transfusion complication. Hemodynamics, timeline, and the presence or absence of pulmonary edema or hemolysis are the defining diagnostic factors.

Step-by-Step Solution

1
Analyze the onset timing and vital signs for each clinical scenario.
Timing ranges from immediately after initiation to several hours post-transfusion, with differing degrees of hemodynamic stability.
Vital signs and symptom onset are the primary ways to stratify transfusion reactions.
2
Identify the reaction with purely inflammatory signs (isolated fever, rigors) and normal hemodynamics.
The first scenario is a febrile non-hemolytic transfusion reaction.
Cytokine accumulation during blood storage causes transient fevers without hemolysis or respiratory distress.
3
Differentiate the two conditions causing post-transfusion respiratory distress based on volume status.
The second scenario (normal CVP) is TRALI, whereas the third scenario (hypertension, JVD, low ejection fraction) is TACO.
TRALI is a noncardiogenic pulmonary edema, whereas TACO is a cardiogenic pulmonary edema driven by fluid overload.
4
Identify the catastrophic reaction occurring immediately upon transfusion initiation.
The fourth scenario is an acute hemolytic transfusion reaction.
ABO incompatibility leads to immediate complement activation, massive intravascular hemolysis (dark urine), shock, and flank pain.

Key Concept

Differentiating blood transfusion reactions by evaluating the onset timeline, hemodynamic stability, and distinguishing features such as volume status and hemolysis.
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Topics

Hematology and Oncology

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