A nurse is caring for a term macrosomic newborn whose mother has poorly controlled type 2 diabetes. The newborn has respiratory distress syndrome. The nurse should be aware that the most likely cause of the respiratory distress is which of the following?
Increased risk of anemia
Hyperinsulinemia
Increased blood viscosity
Brachial plexus injury
The Correct Answer is B
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.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason: Hypocalcemia is not the priority focus of care, as it is a low level of calcium in the blood that can cause muscle twitching, seizures, or cardiac arrhythmias. Hypocalcemia can affect newborns who have mothers with diabetes mellitus, but it is less common and less severe than hypoglycemia.
Choice B reason: Hyperbilirubinemia is not the priority focus of care, as it is a high level of bilirubin in the blood that can cause jaundice, a yellowish discoloration of the skin and eyes. Hyperbilirubinemia can affect newborns who have macrosomia, but it is usually a benign and self-limiting condition that resolves within a few days.
Choice C reason: Hypomagnesemia is not the priority focus of care, as it is a low level of magnesium in the blood that can cause tremors, tetany, or seizures. Hypomagnesemia can affect newborns who have mothers with diabetes mellitus, but it is rare and usually asymptomatic.
Choice D reason: Hypoglycemia is the priority focus of care, as it is a low level of glucose in the blood that can cause diaphoresis, jitteriness, lethargy, or apnea. Hypoglycemia can affect newborns who have macrosomia and mothers with diabetes mellitus, as they have increased insulin production and decreased glucose supply after birth. Hypoglycemia can lead to brain damage or death if not treated promptly.
Correct Answer is A
Explanation
Choice A reason: This statement is correct, as these are the common complications of post-term infants, who are born after 42 weeks of gestation. Meconium aspiration can occur when the fetus passes meconium in utero and inhales it into the lungs, causing respiratory distress, inflammation, and infection. Hypoglycemia can occur due to the depletion of glycogen stores and the increased metabolic demands. Dry, cracked skin can occur due to the loss of vernix caseosa and the reduced amniotic fluid.
Choice B reason: This statement is incorrect, as these are the signs of neonatal hypocalcemia, which is a low level of calcium in the blood. Neonatal hypocalcemia can occur due to maternal diabetes, prematurity, or asphyxia, and can cause jitteriness, seizures, or tetany.
Choice C reason: This statement is incorrect, as these are the characteristics of preterm infants, who are born before 37 weeks of gestation. Excessive vernix caseosa covering the skin is a protective coating that prevents heat and water loss. Lethargy and RDS are signs of immaturity and underdevelopment of the central nervous system and the lungs.
Choice D reason: This statement is incorrect, as these are the features of infants with erythroblastosis fetalis, which is a hemolytic disease caused by the incompatibility of the Rh factor or the ABO blood group between the mother and the fetus. Golden yellow to green-stained skin and nails are due to the accumulation of bilirubin, which is a breakdown product of red blood cells. Absence of scalp hair and an increased amount of subcutaneous fat are due to the chronic hypoxia and edema.
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