3. Congenital pyloric stenosis Flashcards Preview

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Flashcards in 3. Congenital pyloric stenosis Deck (9)

MCC of gastric oulte obstruction in infants ( and frequency )

Hypertrophic pyloric stenosis (1: 600)


presentations and results

Palpable “olive” mass in
epigastric region and nonbilious projectile vomiting at ∼ 2–6 weeks old---> Results in hypokalemic hypochloremic
metabolic alkalosis (2° to vomiting of gastric acid and subsequent volume contraction). Treatment
is surgical incision (pyloromyotomy)


associated with

-exposure to macrolide
- more common in firstborn males



surgical incision (pyloromyotomy)


• In a patient with congenital pyloric stenosis, hypertrophy of the pylorus leads to what problem?

Gastric outlet obstruction


• An infant with projectile vomiting is found to have a palpable, epigastric, olive-sized mass is found on physical exam. Name this condition.

Congenital pyloric stenosis


• In a baby with suspected congenital pyloric stenosis, what type of vomit would rule out the disorder?

Bilious (bilious vomit originates distal to the pyloric sphincter)


• A 3-week-old baby has projectile nonbilious vomiting and a normal physical exam. What treatment will likely be indicated?

Surgical pyloromyotomy (with pyloric stenosis, the classic "olive mass" is often not palpable)


• Congenital pyloric stenosis often occurs in what demographic group?

Male first-born infants

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