Choice A rationale

This is the correct answer. In infants of mothers with poorly controlled diabetes, hyperinsulinemia can lead to increased oxygen consumption and metabolic rate, which can contribute to the development of respiratory distress syndrome.

Choice B rationale

Increased blood viscosity is not the most likely cause of respiratory distress in a macrosomic newborn of a mother with poorly controlled diabetes.

Choice C rationale

A brachial plexus injury is a potential complication of delivery for macrosomic infants, but it is not a cause of respiratory distress syndrome.

Choice D rationale

Increased deposits of fat in the chest and shoulder areas can make delivery more difficult and can increase the risk of birth injuries, but they are not the most likely cause of respiratory distress syndrome in a macrosomic newborn of a mother with poorly controlled diabetes.

Choice A rationale

Administering Vitamin K is an important step in newborn care as it helps with blood clotting and prevents a rare but serious bleeding disorder called Vitamin K Deficiency Bleeding.

However, it is not the immediate priority after ensuring a patent airway.

Choice B rationale

Administering eye prophylaxis, typically in the form of antibiotic ointment, is a standard procedure in newborn care to prevent neonatal conjunctivitis. However, this is not the immediate priority after ensuring a patent airway.

Choice C rationale

Placing an identification bracelet on the newborn is crucial for ensuring the baby’s safety and preventing mix-ups. However, this is not the immediate priority after ensuring a patent airway.

Choice D rationale

Drying the skin of the newborn is the priority action after ensuring a patent airway. This is because newborns are wet with amniotic fluid at birth, and they can lose heat quickly through evaporation if not dried immediately. This can lead to hypothermia, which can be dangerous for the newborn.