An infant is suffering from hypertrophic pyloric stenosis is admitted in the pediatric unit. What does the nurse expect to find when assessing the child?

1. A

   Bilious vomiting

2. B

   Olive shaped mass palpated on right quadrant of the abdomen

3. C

   Abdominal distension

4. D

   Abdominal tenderness

Appeared in: NORCET-7 Mains-2024

Explanation

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• A palpable olive-shaped mass is the pathognomonic, or hallmark, physical finding for Hypertrophic Pyloric Stenosis (HPS).
• This mass is the actual hypertrophied (thickened) pyloric muscle, which feels firm and mobile upon palpation.
• It is typically located in the right upper quadrant (RUQ) of the abdomen, just to the right of the umbilicus.
• The mass is often easiest to feel when the infant is calm and the abdominal muscles are relaxed, sometimes immediately after an episode of vomiting.

Why Other Options Were Wrong

• Option A: Vomiting in HPS is non-bilious (not containing bile). The obstruction is at the gastric outlet, which is proximal to the ampulla of Vater where bile enters the duodenum.
• Option C: Generalized abdominal distension is not a feature of HPS. Because the obstruction is high up, gas and food do not enter the intestines, often leading to a flat or even scaphoid (sunken) lower abdomen.
• Option D: The abdomen in an infant with HPS is typically soft and non-tender. The condition is an obstruction, not an inflammatory process.

Related Visual

• Visual 1: Anatomical Diagram - An illustration showing the thickened pyloric muscle between the stomach and the duodenum, highlighting the narrowed passage.
• Visual 2: Physical Examination Illustration - A drawing depicting the correct hand placement for a nurse to palpate the olive-shaped mass in an infant's right upper quadrant.
• Visual 3: Symptom Infographic - A chart summarizing the key signs of HPS: projectile non-bilious vomiting, the palpable olive mass, and visible peristaltic waves.

Clinical Relevance

• Nursing practice connection: Use the key finding related to Clinical assessment findings in Hypertrophic Pyloric Stenosis (HPS) to guide bedside assessment, documentation, and the next nursing action.
• A nurse's ability to identify the key signs of HPS is crucial for early diagnosis and preventing severe dehydration and electrolyte imbalance.
• Pre-operative nursing care is a priority, focusing on restoring fluid and electrolyte balance with IV fluids (correcting hypochloremic metabolic alkalosis), maintaining NPO status, and monitoring vital signs.
• Post-operative care involves a gradual re-introduction of feedings, monitoring for vomiting, and incision site care.

How to Approach the Question

• First, identify the core diagnosis in the question stem: 'hypertrophic pyloric stenosis'.
• Next, access your knowledge about the pathophysiology of this condition—a thickened pylorus muscle causing gastric outlet obstruction.
• Think through the classic, or pathognomonic, signs associated with HPS. The most specific physical finding is the 'olive-shaped mass'.
• Evaluate each option. Does it fit the pathophysiology? 'Bilious vomiting' is incorrect because the blockage is before the bile duct. 'Abdominal distension' and 'tenderness' are signs of lower GI or inflammatory issues, not HPS.
• Select the option that is the most specific and defining characteristic of the disease, which is the palpable olive-shaped mass.

Concept Tested & Keywords

• Concept Tested: Clinical assessment findings in Hypertrophic Pyloric Stenosis (HPS)
• Stem keywords: infant, hypertrophic pyloric stenosis, assessing
• Lead-in keywords: expect to find
• Clinical cues: Diagnosis of hypertrophic pyloric stenosis in an infant points towards a specific set of gastrointestinal obstruction symptoms.
• Negative lead-in flag: false

Question ID

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