“…They identified longer collagen-ADP duration as a risk factor for ductal closure, although there were no differences in platelet count, mean platelet volume (MPV), and platelet mass index between the open and closed ductus groups. 1 Clinical studies investigating the impact of platelet count on ductal patency in human preterm infants have reported conflicting results, and it is speculated that platelet dysfunction, rather than low platelet count, is the primary contributory factor for the failure of ductal closure in preterm infants. 1,2 We had recently reported that median serum platelet-derived growth factor levels were significantly lower among babies who subsequently required medical treatment for ductal patency.…”