Echocardiographic Diagnosis of Congenital Arterial Catheter Function Changes

Arterial catheter is physiological flow channel between pulmonary artery and descending aorta in fetal circulation. Most right heart blood flow through artery catheter into descending aorta during embryo period. Most term neonates are usually stopped after fetal delivery. Functional closure occurs in 48 h after birth, while 88% should be closed completely at 8 weeks after birth. There was no significant difference between PDA occlusion technique guided by transthoracic echocardiography and conventional funnel PDA closure rate, total closure rate, long term closure rate, pulmonary systolic pressure before surgery and pulmonary artery pressure difference before and after operation (P < 0.05). Conversely, under similar therapeutic effects, funnel type PDA closure guided by transthoracic echocardiography has advantages such as shorter anesthesia time, less total ray volume and contrast agent, lower hospitalization expense and fewer complications. Therefore, through transthoracic echocardiography guidance delivery of order vein approach interventional closure therapy funnel type PDA especially suitable for children, worthy of clinical application.