A nurse is caring for a toddler whose parent states that while bathing the child, she noticed a mass in his abdominal area and that his urine is a pink color. Which of the following actions is the nurse's priority?

Choice A reason: Keeping the baby in an upright position after feedings is an effective strategy to prevent or reduce gastroesophageal reflux, as it allows gravity to help the stomach contents stay down. The parent should hold the baby upright for at least 20 to 30 minutes after each feeding, and avoid placing the baby in a car seat or swing, which can increase the abdominal pressure.

Choice B reason: Feeding the baby formula rather than breast milk is not necessary for gastroesophageal reflux, as breast milk is easier to digest and less likely to cause reflux than formula. The parent should continue to breastfeed the baby, unless there is a medical reason to switch to formula. The parent should also avoid overfeeding the baby, and burp the baby frequently during and after feedings.

Choice C reason: Positioning the baby lying on his stomach is not recommended for gastroesophageal reflux, as it can increase the risk of aspiration, suffocation, and sudden infant death syndrome (SIDS). The parent should place the baby on his back to sleep, and elevate the head of the crib or bassinet by 30 degrees to reduce the reflux.

Choice D reason: Thickening the baby's formula with honey is not advised for gastroesophageal reflux, as honey can cause botulism, a serious and potentially fatal illness, in infants under one year of age. The parent should not add any thickening agents to the formula, unless prescribed by the provider. Some studies suggest that thickening the formula with rice cereal may reduce the reflux, but the evidence is inconclusive and the practice may have adverse effects, such as increased caloric intake, constipation, or food allergies.

Choice A reason: Ridged abdomen is not an expected finding for an infant who has pyloric stenosis, as it indicates abdominal rigidity or guarding, which can be a sign of peritonitis or bowel obstruction. Pyloric stenosis is a narrowing of the pyloric sphincter, which causes gastric outlet obstruction and delayed gastric emptying.

Choice B reason: Red currant jelly stools are not an expected finding for an infant who has pyloric stenosis, as they indicate blood and mucus in the stools, which can be a sign of intussusception or necrotizing enterocolitis. Pyloric stenosis does not affect the lower gastrointestinal tract, and the infant may have constipation or dehydration due to vomiting.

Choice C reason: Projectile vomiting is an expected finding for an infant who has pyloric stenosis, as it occurs after feeding due to the increased pressure in the stomach and the inability to pass food into the duodenum. Projectile vomiting can cause weight loss, dehydration, electrolyte imbalance, and metabolic alkalosis.

Choice D reason: Distended neck veins are not an expected finding for an infant who has pyloric stenosis, as they indicate increased central venous pressure, which can be a sign of heart failure or superior vena cava syndrome. Pyloric stenosis does not affect the cardiovascular system, and the infant may have sunken fontanels or poor skin turgor due to dehydration.