A nurse in the newborn nursery is caring for a group of newborns. Which of the following newborns require immediate attention?

A. A newborn who is 24 hr post-delivery and has not voided: While voiding is expected within the first 24 hours, some healthy newborns may have delayed urination up to this point. Close monitoring is required, but it is not immediately life-threatening. B. A newborn who is 18 hr post-delivery and has acrocyanosis: Acrocyanosis (bluish hands and feet) is a common, benign finding in the first 24–48 hours of life due to immature peripheral circulation and does not indicate urgent concern. C. A newborn who is 24 hr post-delivery and has not passed meconium: Passage of meconium is expected within the first 24 hours, but a slight delay may occur in some healthy term infants. Monitoring and further evaluation may be needed, but it is not immediately critical. D. A newborn who is 12 hr post-delivery and has a temperature of 100.5°F: Fever in a newborn can indicate infection or sepsis, which requires immediate assessment and intervention. Newborns have limited immune responses, making hyperthermia a priority concern requiring urgent attention.