Three hours after birth, a newborn becomes jittery and tachypneic. What should the nurse do first?

Choice A: Obtain a capillary glucose level. This is the first action that the nurse should do, as it can diagnose hypoglycemia, which is a low blood sugar level that can cause jitteriness and tachypnea in newborns. Hypoglycemia can be caused by maternal diabetes, prematurity, infection, or delayed feeding. The nurse should check the glucose level using a heel stick and a glucometer.

Choice B: Feed 30 mL of 10% dextrose in water. This is not the first action that the nurse should do, as it may not be appropriate for all newborns with jitteriness and tachypnea. Feeding 10% dextrose in water can raise the blood sugar level, but it may also cause rebound hypoglycemia or fluid overload. The nurse should feed only after confirming hypoglycemia and obtaining a healthcare provider's order.

Choice C: Wrap tightly in a blanket. This is not the first action that the nurse should do, as it may not address the underlying cause of jitteriness and tachypnea in newborns. Wrapping tightly in a blanket can prevent heat loss and conserve energy, but it may also impair breathing or circulation. The nurse should wrap only after ruling out other causes of jitteriness and tachypnea.

Choice D: Encourage the mother to breastfeed. This is not the first action that the nurse should do, as it may not be feasible or effective for all newborns with jitteriness and tachypnea. Breastfeeding can provide nutrition and bonding for newborns, but it may also be difficult or contraindicated for some newborns with respiratory distress or infection. The nurse should encourage breastfeeding only after assessing and stabilizing the newborn's condition.