Coil occlusion of the large patent ductus arteriosus

While coil occlusion is well accepted for the small patent ductus arteriosus (PDA), occlusive devices are preferred for the larger (> 3 mm) ducts by most institutions. Because of costs concerns, occlusive devices are not always realistic in many countries. The technique of simultaneous delivery of multiple coils with bioptome assistance works well for relatively larger ducts. This technique requires careful case selection through echocardiography. The duct anatomy plays a crucial part in determining the suitability for coil occlusion. Coil occlusion has a specific advantage for relatively larger ducts in selected small children and in preterm infants because it is possible to accomplish delivery of multiple coils through relatively small introducer sheaths. In addition, aortic narrowing is less likely because coils compact in the ampulla. This review describes case selection strategies and techniques of coil occlusion of the large PDA. Relevant illustrative images are shown.