Which of the following is a stimulus for closure of ductus arteriosus?
a. Increased O2 tension(Ref: Nelson's 20/e p 2162)In the course of several days after birth, the high arterial Po2 constricts and eventually closes the ductus arteriosus, which eventually becomes the ligamentum arteriosum
Increased O2 tension
Hypoxia
Prematurity
Hypercapnia
C.V.S.