Pyloric stenosis: the muscular valve between the stomach and the small intestine becomes abnormally thickened, leading to partial or complete blockage. It typically presents between 3-6 weeks of age.
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Projectile Vomiting
Symptoms
Projectile vomiting after feedings
Persistent hunger despite regular feedings
Weight loss and failure to gain weight
Dehydration and decreased urine output (Priority concern)
Palpable lump in the upper abdomen (due to an enlarged pylorus)
Visible peristalsis
Treatment
Pyloromyotomy treats pyloric stenosis by cutting the thickened pyloric sphincter muscles to allow food to pass from the stomach to small intestine more easily