What symptoms should a nurse expect in a 6-week-old infant admitted for evaluation of suspected pyloric stenosis?
Projectile vomiting.
Effortless regurgitation.
Metabolic acidosis.
Distended abdomen.
The Correct Answer is A
Choice A rationale
Projectile vomiting is a common symptom in infants with pyloric stenosis. This is due to the narrowing of the pylorus, the muscular valve at the bottom of the stomach, which prevents breast milk or formula from passing through to the small intestine.
Choice B rationale
Effortless regurgitation is not typically associated with pyloric stenosis. The hallmark symptom of pyloric stenosis is projectile vomiting.
Choice C rationale
Metabolic acidosis is not a typical symptom of pyloric stenosis. The hallmark symptom of pyloric stenosis is projectile vomiting.
Choice D rationale
While a distended abdomen can occur in some cases of pyloric stenosis, it is not the most common symptom. The hallmark symptom of pyloric stenosis is projectile vomiting.

Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale:
Abdominal rigidity and pain on palpation are not typical signs of pyloric stenosis. Pyloric stenosis usually presents with non-bilious projectile vomiting, a palpable olive-shaped mass in the upper abdomen, and signs of dehydration.
Choice B rationale:
A rounded abdomen and hypoactive bowel sounds are characteristic signs of pyloric stenosis. The hypertrophied pyloric muscle obstructs the passage of food from the stomach to the duodenum, leading to gastric distention, visible peristalsis, and vomiting. The infant may appear hungry after vomiting and will continue to feed, leading to weight loss.
Choice C rationale:
Visible peristalsis and weight loss are consistent with pyloric stenosis. The visible peristalsis occurs as the infant tries to force the stomach contents through the narrowed pyloric sphincter. Weight loss is a result of poor feeding and vomiting.
Choice D rationale:
Distention of the lower abdomen and constipation are not typical findings in pyloric stenosis. Constipation suggests a lower gastrointestinal issue, while pyloric stenosis primarily affects the upper gastrointestinal tract.
Correct Answer is D
Explanation
Choice A rationale
Discouraging the client from ambulating is not the best action. While it’s important to limit weight-bearing activities initially, movement is encouraged to promote circulation and prevent complications such as deep vein thrombosis.
Choice B rationale
Using a hair dryer on a hot setting to dry the cast is not recommended. Heat can cause the cast to dry out and crack, and it can also burn the skin.
Choice C rationale
Keeping the client’s leg in a dependent position is not advisable. This can lead to increased swelling and pain, and potentially delay healing.
Choice D rationale
Performing a neurovascular check of the lower extremities is the correct action. This involves assessing for pain, pallor, pulselessness, paresthesia, and paralysis. These checks are crucial for monitoring for complications such as compartment syndrome and ensuring the cast is not too tight.
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