False about PDA is
a) More common in females
b) Anatomical closure takes 21 hours after birth
c) PGE maintains patency of ductus
d) Dilatation of ascending aorta
Correct Answer - B
Answer- B. Anatomical closure takes 21 hours after birth
Patent ductus arteriosus is a communication between the pulmonary
artery and aorta.
‘Functional closure’ takes place within 15 hours of birth. ‘Anatomic
closure’ of ductus arteriosus occurs 10-21 days after birth.
Prostaglandins maintain the patency of ductus.
The persistence of function of ductus arteriosus beyond 24 hours
after birth is considered as PDA in term neonate, i.e. if functional
closure does not take place in 24 hours after birth, it is considered
as PDA.