A 9-month-old infant, exclusively breastfed by a mother whose diet consists mainly of polished rice, is admitted with irritability, a weak cry, tachycardia of 180 bpm, and signs of respiratory distress. The infant appears pale and has peripheral edema. What is the nurse's PRIORITY action?

1. A

   Administer a dose of furosemide as ordered to reduce fluid overload.

2. B

   Obtain a detailed 7-day dietary history from the mother.

3. C

   Prepare the infant for endotracheal intubation and mechanical ventilation.

4. D

   Prepare for immediate parenteral administration of thiamine.

Appeared in: NORCET 5 Prelims - Sept 2023 (Shift-2)

Explanation

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• The infant's signs and symptoms are characteristic of acute cardiac beriberi (Shoshin beriberi), a medical emergency resulting from severe thiamine (Vitamin B1) deficiency.
• The mother's diet of polished rice is deficient in thiamine, leading to low thiamine levels in her breast milk and subsequently in the exclusively breastfed infant.
• Cardiac beriberi causes high-output heart failure. The priority is to treat the underlying cause, not just the symptoms.
• Immediate parenteral (IV or IM) administration of thiamine is the definitive, life-saving treatment that can lead to dramatic clinical improvement within hours by restoring normal cellular metabolism in the heart muscle.

Why Other Options Were Wrong

• Option A: Administering furosemide treats the symptom of fluid overload (edema, respiratory distress) but does not address the root cause of the heart failure, which is thiamine deficiency. It is a supportive measure, not the primary, life-saving intervention.
• Option B: Obtaining a detailed dietary history is important for confirming the diagnosis and for long-term counseling, but it is not an immediate priority in a critically ill infant who requires urgent life-saving treatment.
• Option C: Preparing for intubation is a reactive, supportive measure for impending respiratory failure. While it may become necessary if the infant's condition deteriorates, the priority is to administer the definitive treatment (thiamine) that can reverse the underlying cause and potentially prevent the need for mechanical ventilation.

Related Visual

• Visual 1: Flowchart: Pathophysiology of Infantile Beriberi - Illustrating the pathway from a maternal diet of polished rice to thiamine deficiency in the infant, leading to cardiac failure.
• Visual 2: Table: Types of Beriberi - Comparing the signs and symptoms of wet (cardiovascular), dry (neurological), and infantile beriberi.

Clinical Relevance

• Nursing practice connection: Safe nursing care depends on performing Priority nursing action for infantile beriberi (thiamine deficiency) in the correct sequence, documenting the action clearly, and monitoring for the expected response.
• Nurses must be vigilant in identifying nutritional deficiencies as the cause of acute illness in infants, especially when known risk factors like a restricted maternal diet are present.
• Recognizing infantile beriberi is critical because it is rapidly fatal if untreated but shows dramatic improvement with prompt thiamine administration.
• What if? If the infant presented only with neurological signs like aphonia (voiceless cry) and ptosis (drooping eyelids) without cardiac signs, the diagnosis would be dry infantile beriberi. The priority action would still be immediate thiamine administration, as it is still an emergency that can progress to the cardiac form or cause permanent neurological damage.

How to Approach the Question

• First, analyze the patient's demographics and history: a 9-month-old infant, exclusively breastfed by a mother on a polished rice diet. Recognize that this diet is a major red flag for thiamine deficiency.
• Next, cluster the presenting symptoms: Cardiac (tachycardia, edema, pallor), Respiratory (distress), and Neurological (irritability, weak cry).
• Synthesize the history and symptoms to form a primary diagnosis. The classic triad of maternal diet, cardiac failure, and neurological signs points directly to infantile beriberi.
• Evaluate the question, which asks for the PRIORITY action. This means you must select the most critical, life-saving intervention.
• Assess the options: D (thiamine) treats the root cause. A (furosemide) and C (intubation) treat the symptoms/complications. B (history) is a diagnostic step that can be delayed.
• Conclude that treating the underlying cause of a life-threatening condition is the highest priority, making parenteral thiamine the correct answer.

Concept Tested & Keywords

• Concept Tested: Priority nursing action for infantile beriberi (thiamine deficiency).
• Stem keywords: 9-month-old infant, exclusively breastfed, polished rice, tachycardia, respiratory distress, peripheral edema, priority action
• Lead-in keywords: PRIORITY
• Clinical cues: Maternal diet of polished rice is a major risk factor for thiamine deficiency.
• Clinical cues: The combination of cardiac (tachycardia, edema) and neurological (irritability, weak cry) symptoms in an infant points towards beriberi.

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