The nurse is caring for a 3-week-old boy born at 29 weeks of…

The nurse is caring for a 3-week-old boy born at 29 weeks of gestation. While taking vital signs and changing his diaper after stooling, the nurse observes his skin is slightly mottled, his arms and legs are limp and extended, he has the hiccups, his respirations are deep and rapid, and his heart rate is regular and rapid. The nurse should recognize these behaviors as signs of what?