A nurse is caring for a child who has Kawasaki disease. Which of the following systems should the nurse monitor in response to this diagnosis?

A. "I will keep my baby in an upright position after feedings."
Gastroesophageal reflux (GER) is a condition where the stomach contents flow back into the esophagus, which can cause spitting up or regurgitation in infants. Keeping the baby in an upright position after feedings can help reduce the likelihood of reflux episodes. By holding the baby in an upright position for about 30 minutes after feeding, gravity can aid in keeping the stomach contents from flowing back into the esophagus.
The other statements are incorrect or do not address the management of gastroesophageal reflux:
B. "My baby's formula can be thickened with oatmeal." - Thickening formula with oatmeal is not a standard recommendation for managing GER in infants. In some cases, thickening formulas may be recommended, but it should be done under the guidance of a healthcare provider.
C. "I should position my baby side-lying during sleep." A side-lying position is not recommended for sleep in infants, as it increases the risk of sudden infant death syndrome (SIDS). The safe sleep position for infants is on their back.
D. "I will have to feed my baby formula rather than breast milk." - The type of feeding (formula or breast milk) does not directly impact the occurrence of gastroesophageal reflux. Both breast milk and formula can cause reflux in some infants. It is essential to discuss feeding options with a healthcare provider to determine the best approach for the individual infant's needs.

Consuming a large amount of milk, such as a quart a day, can lead to iron deficiency anemia in toddlers. Milk is a poor source of iron, and excessive milk intake can displace other iron-rich foods from the toddler's diet.

Iron deficiency anemia occurs when the body lacks sufficient iron to produce enough hemoglobin, which is essential for oxygen transport in the blood. Toddlers are particularly vulnerable to iron deficiency anemia because they have increased iron needs for growth and development.

Option A (Obesity) and option B (Diabetes mellitus) are not directly related to the toddler's milk consumption. Obesity may be a concern if the child consumes excessive calories overall, but it is not specifically associated with milk intake. Similarly, diabetes mellitus is not directly related to milk consumption.

Option D (Rickets) is caused by a deficiency of vitamin D, not iron. Rickets results in weakened and deformed bones, and it is usually associated with inadequate sunlight exposure and insufficient dietary vitamin D. While milk is often fortified with vitamin D, excessive milk intake can displace other vitamin D sources in the diet and contribute to an increased risk of rickets, but the primary concern with excessive milk intake is iron deficiency anemia.