How long do you normally have to wait to get a bowel movement after a pyloric stenosis surgery?

Within 24 hours. After surgical repair of pyloric stenosis the infant will start eating within 4-6 hours. As the volume of feeds increases to what it was prior to the onset of pyloric symptoms normal bowel movements will follow.
Soon. The minimally invasive repair of this procedure causes little delay in restarting the baby's movement of the bowels. If the diagnosis is made early and the child is well hydrated, often an overnight stay is all that it required to get the child home. Projectile vomiting in the first few months of life is usually the first sign of this condition. See your pediatrician for advice.