Patent ductus arteriosus

Patent ductus arteriosus is condition that arterial duct does not close and continuing to open up after birth. Patent ductus arteriosus by the first six pairs of bronchial artery lesions from. In the fetal circulation, it will most of the right ventricle into the pulmonary artery into the descending aorta blood flow to the placenta for oxygenation. After birth, patent ductus arteriosus may exist as an independent disease (which can exist in a vacuum) can also be combined with other cardiovascular abnormalities, such as narrow or interrupted aortic arch, severe aortic stenosis, hypoplastic left heart syndrome and pulmonary atresia.

Arterial duct is the normal blood flow channel during fetal pulmonary artery and aorta. Since the non-respiratory lung function, the pulmonary artery from the right ventricular blood into the descending aorta by the catheter, and the left ventricular blood into the ascending aorta, the ductus arteriosus during the special cycle to the way embryos are necessary. After birth, lung expansion and gas exchange function of commitment, pulmonary circulation and systemic circulation own catheters because of the near video-on-demand that is closed disuse. Such as the continued closure, constitutes a pathological, known as patent ductus arteriosus (disorder). Should be the implementation of surgery, interruption of its blood flow. Patent ductus arteriosus on the pulmonary blood flow can be both reduced when cyanotic heart disease. Patent ductus arteriosus is a relatively common congenital cardiovascular malformations, congenital heart disease accounted for the total number of 12 ~ 15%. About twice as many women in the male. About 10% of the cases of the coexistence of other cardiovascular abnormalities. Patent ductus arteriosus in preterm infants is commonly found in the full 28 weeks of pregnancy before the birth incidence of infants to 80%. The longer gestation period, patent ductus arteriosus lower incidence.