A 2-week-old infant presents with poor feeding,fatigue,dyspnea,and a murmur.She is diagnosed with a patent ductus arteriosus (PDA).A nurse recalls this condition results in a(n):
A) Decreased pulmonary blood flow
B) Right-to-left shunt
C) Left-to-right shunt
D) Increased systemic blood flow

Question

Quizplus · Accepted Answer

PDA is failure of the fetal ductus arteriosus to close.The continued patency of this vessel allows blood to flow from the higher-pressure aorta to the lower-pressure pulmonary artery,causing a left-to-right shunt.
PDA is failure of the fetal ductus arteriosus to close.The continued patency of this vessel allows blood to flow from the higher-pressure aorta to the lower-pressure pulmonary artery,causing a left-to-right shunt.It does not cause decreased pulmonary blood flow
PDA is failure of the fetal ductus arteriosus to close.The continued patency of this vessel allows blood to flow from the higher-pressure aorta to the lower-pressure pulmonary artery,causing a left-to-right shunt.
PDA is failure of the fetal ductus arteriosus to close.The continued patency of this vessel allows blood to flow from the higher-pressure aorta to the lower-pressure pulmonary artery,causing a left-to-right shunt.It could decrease systemic blood flow,not increase it.

A 2-Week-Old Infant Presents with Poor Feeding,fatigue,dyspnea,and a Murmur