What is the most likely cause of respiratory distress syndrome in a term macrosomic newborn whose mother has poorly controlled type 2 diabetes?
Increased deposits of fat in the chest and shoulder area.
Hyperinsulinemia.
Brachial plexus injury.
Increased blood viscosity.
The Correct Answer is B
Choice A rationale
Increased deposits of fat in the chest and shoulder area are not typically associated with respiratory distress syndrome in a term macrosomic newborn whose mother has poorly controlled type 2 diabetes.
Choice B rationale
Hyperinsulinemia is a condition in which there are excess levels of insulin circulating in the blood. In the case of a term macrosomic newborn whose mother has poorly controlled type 2 diabetes, the baby’s pancreas may produce extra insulin in response to the mother’s high blood glucose levels. This excess insulin can delay surfactant production, which is needed for lung maturation, leading to respiratory distress syndrome.
Choice C rationale
Brachial plexus injury is a type of birth injury that can occur due to the baby’s large size and difficulty being born. However, it is not the most likely cause of respiratory distress syndrome in a term macrosomic newborn whose mother has poorly controlled type 2 diabetes.
Choice D rationale
Increased blood viscosity can occur in newborns of mothers with poorly controlled diabetes due to polycythemia (an abnormally high number of red blood cells). However, this is not the most likely cause of respiratory distress syndrome in a term macrosomic newborn.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale: Uteroplacental insufficiency causes late decelerations due to reduced oxygenation, not mechanical pressure. It reflects placental dysfunction, not direct cranial compression effects.
Choice B rationale: Spontaneous rupture of membranes increases infection and labor risk but does not directly alter cerebral perfusion or trigger vagal responses linked to head compression.
Choice C rationale: Altered fetal cerebral blood flow results from cranial pressure during contractions, triggering vagal stimulation and early decelerations. This is the physiological response to head compression.
Choice D rationale: Umbilical cord compression causes variable decelerations due to transient blood flow obstruction, unrelated to cranial pressure or cerebral perfusion changes.
Correct Answer is C
Explanation
Choice A rationale
A probable sign of pregnancy includes objective signs observed by an examiner, such as changes in the pelvic organs, enlargement of the abdomen, and positive pregnancy test.
Choice B rationale
Possible signs of pregnancy are those that are subjective and reported by the patient, such as nausea, vomiting, and missed period. These signs could be due to other conditions.
Choice C rationale
Feeling the baby moving, also known as quickening, is a presumptive sign of pregnancy. These are changes felt by the woman herself and can be caused by other conditions.
Choice D rationale
Positive signs of pregnancy are those that are confirmed by the examiner and cannot be caused by any other condition. These include hearing the fetal heartbeat, visualizing the fetus, and feeling the baby move.
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