Problem: The nurse is administering the initial bath to a neonate who's 4 hours old and weighs 7 lb, 2 oz (3,235-g). The neonate's vital signs before the bath were: pulse, 126 beats/minute, respiratory rate, 42 breaths/minute, and rectal temperature, 98.4 degrees F (36.9 degrees C). The neonate has been crying lustily throughout the bath. As the nurse dries the neonate, she notes that the neonate's color becomes slightly dusky. The neonate cries weakly and stops moving vigorously. Which action would the nurse do first?