Coil Occlusion of Patent Ductus Arteriosus

Background Coils are the only devices available for transcatheter occlusion of patent ductus arteriosus (PDA) in Japan. Since April 1999, we have introduced a 0.052-inch Gianturco coil (0.052-inch coil) to close PDA ≥2.5 mm. Methods and Results A retrospective survey of the outcome of coil occlusions for PDA ≥2.5 mm before and after the 0.052-inch coil became available found that (1) the frequency of PDA ≥2.5 mm among all candidates for coil occlusion significantly increased after the availability of a 0.052-inch coil (p<0.01); (2) deployment complicated by migration (p<0.01), and prolonged procedure time (p<0.05) were significantly decreased after the introduction of the 0.052-inch coil. In a multivariate logistic regression model for uneventful deployment adjusted for age, pulmonary to systemic flow ratio, and use of a 0.052-inch coil, use of the 0.052-inch coil significantly decreased eventful deployment (p<0.05); and (3) successful deployment of a coil for PDA ≥4 mm significantly increased with the 0.052-inch coil (p<0.01). Complete occlusion was achieved once deployment was successful. Conclusion Introduction of the 0.052-inch coil decreased complicated coil occlusion deployment for PDA ≥2.5 mm, and contributed to a better likelihood of coil occlusion for PDA ≥4 mm. (Circ J 2006; 70: 28 - 30)