
Babies born preterm commonly have a condition called Patent Ductus Arteriosus (PDA). This is when the blood vessel (Ductus arteriosus, which allows during pregnancy, blood to bypass the baby’s developing lungs and reach the mother’s placenta, remains open after birth. The word ‘patent’ here means ‘open’. A PDA is associated with many very serious and life-threatening complications which can include brain damage and chronic breathing difficulties. The condition can be treated with ibuprofen, but giving extremely preterm babies can result in significant complications. Medical opinion is therefore divided on how best to care for extremely preterm babies with a PDA. In Baby Oscar, Babies will be randomly allocated to receive either treatment with ibuprofen or a matched placebo. Information will be collected about if/when the PDA closes and other health outcomes.



