During an assessment of a newborn infant, the nurse recalls that pyloric stenosis would be exhibited by:
a. Projectile vomiting.
b. Hypoactive bowel activity.
c. Palpable olive-sized mass in the right lower quadrant.
d. Pronounced peristaltic waves crossing from right to left.
ANS: A
Significant peristalsis, together with projectile vomiting, in the newborn suggests pyloric stenosis. After feeding, pronounced peristaltic waves cross from left to right, leading to projectile vomiting. One can also palpate an olive-sized mass in the right upper quadrant.
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