A 30-year-old pregnant woman with hyperemesis gravidarum is at risk for Wernicke's encephalopathy. Which vitamin supplement is essential in her treatment plan?

1. A

   Suggest vitamin C supplements daily

2. B

   Administer intravenous thiamine therapy

3. C

   Start vitamin D injections only

4. D

   Prescribe oral folic acid tablets

Appeared in: RRB Nsg. Superintendent-2026 (Shift -2nd)

Explanation

• Hyperemesis gravidarum is characterized by excessive vomiting, leading to dehydration, electrolyte imbalance, and severe nutritional deficiencies.
• This condition places the patient at high risk for thiamine (Vitamin B1) deficiency, as thiamine is a water-soluble vitamin that is rapidly depleted.
• Thiamine deficiency is the direct cause of Wernicke's encephalopathy, a serious and life-threatening neurological condition.
• Due to the patient's inability to tolerate oral intake, intravenous (IV) administration of thiamine is the essential and most effective route to rapidly replenish stores and prevent or treat Wernicke's encephalopathy.

Why Other Options Were Wrong

• Option A: Vitamin C deficiency causes scurvy, which presents with symptoms like bleeding gums, poor wound healing, and fatigue. It is not the cause of Wernicke's encephalopathy.
• Option C: Vitamin D is essential for calcium metabolism and bone health. Its deficiency can lead to rickets in children or osteomalacia in adults but is not associated with the acute neurological symptoms of Wernicke's encephalopathy.
• Option D: Folic acid is critical during the periconceptional period to prevent neural tube defects (like spina bifida) in the developing fetus. It has no role in the prevention or treatment of Wernicke's encephalopathy.

Related Visual

• Visual 1: Infographic: The classic triad of Wernicke's Encephalopathy (Ataxia, Confusion, Ophthalmoplegia), helping students memorize the key signs.
• Visual 2: Flowchart: Illustrating the pathway: Hyperemesis Gravidarum → Severe Vomiting → Malabsorption → Thiamine (B1) Deficiency → Wernicke's Encephalopathy.

Clinical Relevance

• Nursing practice connection: Use the key finding related to Management of Wernicke's encephalopathy risk in a patient with hyperemesis gravidarum to guide bedside assessment, documentation, and the next nursing action.
• Nurses must recognize that any patient with a history of prolonged vomiting, chronic alcoholism, or malnutrition is at high risk for thiamine deficiency and Wernicke's encephalopathy.
• A critical patient safety intervention is to administer IV thiamine before administering any glucose-containing fluids. Giving glucose first can precipitate or acutely worsen Wernicke's encephalopathy by rapidly depleting the body's last reserves of thiamine needed for carbohydrate metabolism.
• What if? If the patient had only mild morning sickness and was able to tolerate oral intake, oral thiamine supplements might be considered for prevention. However, with a diagnosis of active hyperemesis gravidarum, the intravenous route is necessary for effective treatment.

How to Approach the Question

• First, identify the key conditions in the clinical scenario: hyperemesis gravidarum (severe vomiting in pregnancy) and Wernicke's encephalopathy (a neurological disorder).
• Recall the pathophysiology of Wernicke's encephalopathy. It is caused by a deficiency of a specific vitamin.
• Connect the two conditions: hyperemesis gravidarum leads to malnutrition and malabsorption, which causes the specific vitamin deficiency that results in Wernicke's encephalopathy.
• Identify the causative vitamin: Thiamine (Vitamin B1).
• Evaluate the options to find the one that provides thiamine. 'Administer intravenous thiamine therapy' is the direct treatment.
• Consider the route of administration. Given the patient's severe vomiting (hyperemesis), the intravenous (IV) route is the most appropriate and effective choice over oral supplements.

Concept Tested & Keywords

• Concept Tested: Management of Wernicke's encephalopathy risk in a patient with hyperemesis gravidarum.
• Stem keywords: hyperemesis gravidarum, Wernicke's encephalopathy, pregnant woman, vitamin supplement
• Lead-in keywords: essential
• Clinical cues: 30-year-old pregnant woman: Highlights the specific patient population.
• Clinical cues: Hyperemesis gravidarum: Indicates severe vomiting and risk of nutritional deficiencies.

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