A patient develops fever (↑ 1.5°C), chills, and rigor within 15–20 minutes of starting blood transfusion. BP and oxygen saturation are normal. Which blood transfusion reaction is most likely?

1. A

   Non-hemolytic febrile reaction

2. B

   Allergic reaction

3. C

   Sepsis (septic transfusion reaction)

4. D

   Acute hemolytic reaction

Appeared in: NORCET 10 Mains

Explanation

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• A febrile non-hemolytic transfusion reaction (FNHTR) is the most common type of transfusion reaction.
• It is characterized by a temperature rise of at least 1°C, chills, and rigor, which matches the patient's presentation.
• The reaction is caused by the recipient's antibodies reacting to leukocytes (white blood cells) in the donor blood, leading to the release of fever-inducing substances called cytokines.
• Crucially, in FNHTR, other vital signs like blood pressure and oxygen saturation typically remain stable, as described in the scenario.

Why Other Options Were Wrong

• Option B: An allergic reaction is incorrect because its hallmark signs are skin-related, such as itching (pruritus) and hives (urticaria). These symptoms were not reported in the patient.
• Option C: Sepsis is incorrect because the patient's blood pressure is normal. A septic reaction from bacterially contaminated blood would typically cause severe symptoms, including significant hypotension (low blood pressure) and signs of shock.
• Option D: An acute hemolytic reaction is incorrect because the patient's vital signs are stable. This is the most dangerous reaction, characterized by rapid intravascular destruction of red blood cells, leading to hypotension, shock, low back/flank pain, and hemoglobinuria (dark red urine), none of which are present.

Related Visual

• Visual 1: Infographic: A comparative table of acute transfusion reactions, highlighting key differences in signs, symptoms, onset, and cause for FNHTR, Allergic, Sepsis, and Acute Hemolytic reactions.
• Visual 2: Flowchart: A decision-making tree for nurses when a transfusion reaction is suspected, starting with 'Stop the Transfusion' and branching based on key symptoms (e.g., 'Fever + Stable Vitals' vs. 'Hypotension + Dark Urine').

Clinical Relevance

• Nursing practice connection: Knowing Recognition and differentiation of acute blood transfusion reactions helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
• The nurse's first and most critical action for any suspected transfusion reaction is to immediately stop the infusion to prevent further harm to the patient.
• Differentiating between reaction types is vital. While FNHTR is often managed with antipyretics, an acute hemolytic reaction is a medical emergency requiring aggressive support to prevent kidney failure and death.
• What if the patient's BP had dropped to 80/50 mmHg? If the blood pressure had dropped, the suspicion would shift immediately towards a more severe reaction like sepsis or an acute hemolytic reaction, requiring emergency intervention, including fluid resuscitation and notifying the rapid response team.

How to Approach the Question

• First, identify the core clinical event: a reaction during a blood transfusion.
• Next, carefully list the patient's specific signs and symptoms: fever, chills, rigor.
• Pay close attention to the vital signs provided: BP and O2 saturation are NORMAL. This is a crucial piece of data.
• Systematically evaluate each option against the clinical picture. Does an allergic reaction fit? No, there are no skin signs. Does sepsis or hemolytic reaction fit? No, the vital signs are stable.
• The combination of fever/chills with stable vitals strongly points to a non-hemolytic febrile reaction. Select the option that matches this diagnosis.

Concept Tested & Keywords

• Concept Tested: Recognition and differentiation of acute blood transfusion reactions.
• Stem keywords: blood transfusion, fever, chills, rigor, normal BP, normal oxygen saturation
• Lead-in keywords: most likely
• Clinical cues: The combination of fever, chills, and rigor points towards an inflammatory or immune response.
• Clinical cues: Normal BP and oxygen saturation are critical negative findings, making life-threatening reactions like sepsis or acute hemolysis less likely.

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