Journal of JCIC

Coil occlusion of patent ductus arteriosus (PDA) is the one of the common procedures that has been performed by pediatric cardiologists. Since Amplatzer Duct Occluder is available in Japan, coil occlusion is indicated only PDA with <2 mm of diameter. Typically, using 4 Fr catheter, Flipper detachable coil is placed with <1 loop in pulmonary artery and the remaining part in the aortic ampulla. Based on descending aortography in lateral projection, the size of PDA is measured. The loop size of coil is chosen as loop diameter >2 times of the minimum diameter of PDA. Coil is deployed either from aorta or from pulmonary artery depending on the anatomy of PDA. Because PDA connects pulmonary artery and aorta, coil may dislodge or cause obstruction of the adjacent vessels. In this article, I describe basic techniques of coil placement, possible complication, and the way to prevent complication for young beginner.