The ductus arteriosus generally closes functionally within a short period of time (24 hours) after birth and anatomically by 2 to 3 months. The ductus arteriosus is a congenital passageway between the right and left atria of the human heart during fetal life. In most people, the ductus arteriosus closes naturally to form a ligament in less than a few days after birth, and in a very small number of people, it can heal naturally by 3 months, after which it is referred to as an incomplete ductus arteriosus if it still exists. Arterial ductus arteriosus mainly causes the unoxygenated blood from the venous system to enter the arterial system, which makes the whole body relatively insufficient in oxygen supply, and is prone to tissue hypoxia and cyanosis, which will increase the cardiopulmonary load in time, and lead to pulmonary hypertension, cardiopulmonary insufficiency, recurrent pneumonia, etc., and requires timely consultation with the cardiothoracic surgery.