Which finding would alert the nurse to suspect that a newborn is experiencing respiratory distress?

The foramen ovale closes, preventing blood exchange from right to left in the heart. This is because the foramen ovale is a fetal shunt that allows blood to bypass the lungs and flow from the right atrium to the left atrium. After birth, when the baby starts to breathe air, the lungs expand and the pulmonary resistance decreases. This causes an increase in blood flow and pressure in the left atrium, which pushes the foramen ovale closed. This prevents blood from mixing between the right and left sides of the heart and allows oxygenated blood to circulate to the body¹².

Choice A is not correct because the ductus arteriosus does not expand to allow more blood to enter the lungs. The ductus arteriosus is another fetal shunt that

connects the pulmonary artery to the aorta. It allows blood to bypass the lungs and flow from the right ventricle to the aorta. After birth, when the baby starts to breathe air, the oxygen concentration in the blood increases and causes the ductus arteriosus to constrict and close. This increases blood flow to the lungs and decreases blood flow to the aorta.

Choice C is not correct because the umbilical vein that carried oxygenated blood in utero does not become the ascending aorta entering the right atrium. The umbilical vein is a fetal vessel that carries oxygenated blood from the placenta to the fetus. It connects to either the portal vein or the ductus venosus, which then drains into the inferior vena cava. After birth, when the umbilical cord is clamped and cut, the umbilical vein collapses and becomes a fibrous cord called ligamentum teres hepatis.

Choice D is not correct because the ductus venosus does not shunt oxygenated aortic blood to the lungs. The ductus venosus is another fetal vessel that connects the umbilical vein to the inferior vena cava. It allows some of the oxygenated blood from the placenta to bypass the liver and enter directly into the systemic circulation. After birth, when the umbilical cord is clamped and cut, the ductus venosus closes and becomes a fibrous cord called ligamentum venosum.

The baby sleeps with the mother in bed. This is because sleeping with the baby in the same bed increases the risk of sudden infant death syndrome (SIDS), suffocation, strangulation, and entrapment. The nurse should have assessed the mother’s sleeping arrangements for the baby and provided education on safe sleep practices before discharge. The nurse should advise the mother to place the baby on a firm surface, such as a crib or bassinet, in the same room but not in the same bed as the mother.

Choice B is wrong because having windows covered with screens is not a sign of inadequate home assessment. Screens can help prevent insects and other animals from entering the home and posing a health hazard.

Choice C is wrong because having a refrigerator in the kitchen is not a sign of inadequate home assessment. A refrigerator can help store food and breast milk safely and prevent spoilage and contamination.

Choice D is wrong because having a changing area for the baby is not a sign of inadequate home assessment. A changing area can help keep the baby clean and comfortable and prevent diaper rash and infection.