A nurse is caring for an infant who is receiving phototherapy. Which of the following findings requires intervention by the nurse?

Choice A reason: This action is the first and most important intervention that the nurse should perform, as it can prevent or reduce the compression of the umbilical cord, which can cause fetal hypoxia, bradycardia, or death. The nurse should insert a gloved hand into the vagina and gently push the presenting part away from the cord, and maintain this position until the delivery.

Choice B reason: This action is not the first intervention that the nurse should perform, as it does not address the cause of the cord prolapse, which is the displacement of the cord below the presenting part. However, this action is helpful to prevent the drying and infection of the cord, and should be done after the first intervention.

Choice C reason: This action is not the first intervention that the nurse should perform, as it may not be effective or feasible depending on the stage of labor and the client's condition. However, this action is beneficial to reduce the pressure of the presenting part on the cord, and should be done after the first intervention.

Choice D reason: This action is not the first intervention that the nurse should perform, as it does not provide immediate relief or protection to the fetus. However, this action is necessary to expedite the delivery and prevent further complications, and should be done after the first intervention.

Choice A reason: Increased risk of anemia is not a likely cause of respiratory distress in a term macrosomic newborn, as it can affect any newborn regardless of the maternal diabetes status or the fetal size. Anemia can cause pallor, tachycardia, and poor feeding, but not respiratory distress.

Choice B reason: Hyperinsulinemia is a likely cause of respiratory distress in a term macrosomic newborn, as it results from the fetal exposure to high maternal glucose levels and the subsequent overproduction of insulin. Hyperinsulinemia can impair the synthesis of surfactant, which is a substance that prevents the alveoli from collapsing and facilitates gas exchange. Hyperinsulinemia can also cause hypoglycemia, which can affect the respiratory center and cause apnea.

Choice C reason: Increased blood viscosity is not a likely cause of respiratory distress in a term macrosomic newborn, as it can affect any newborn with polycythemia, which is an abnormally high number of red blood cells. Polycythemia can cause cyanosis, jaundice, and thrombosis, but not respiratory distress.

Choice D reason: Brachial plexus injury is not a likely cause of respiratory distress in a term macrosomic newborn, as it affects the nerves that supply the arm and hand, not the lungs. Brachial plexus injury can occur due to the excessive traction or stretching of the shoulder during delivery, and can cause weakness, paralysis, or sensory loss in the affected arm.