title: [Mid-term follow-up results of coil embolization for patent ductus arteriosus].
abstract: Mid-term follow-up results of coil embolization for patent ductus arteriosus (PDA) were evaluated in 19 patients aged from 2 years 9 months to 13 years (median: 5 years and 10 months) who underwent coil embolization for PDA. The minimum diameter of PDA ranged from 1.0 to 3.5 mm (mean 2.3 +/- 0.8 mm). Coil embolization was performed by the retrograde approach in 16 patients and the anterograde approach in 3, using a Gianturco coil in 11 and a Jackson detachable coil system in 8. Sixteen patients underwent single coil embolization and three patients received two coils simultaneously with detachable coil systems. Follow-up evaluation was performed with color flow mapping and pulsed Doppler echo to identify residual shunt or acquired left pulmonary artery stenosis after embolization at 1 day, 1 week, 1, 3, 6 and 12 months, and every 6 months thereafter. In two patients, a coil had migrated into the distal left pulmonary artery immediately after implantation, and could be safely retrieved. Minimum residual shunt was found in six patients (32%) on the day after the procedure. Spontaneous closure was noted in all patients within 6 months. Recanalization of completely occluded PDA was observed in one patient at 1 month after embolization. However, spontaneous closure of the residual shunt was found at 1 year and 6 months of follow-up. There was no evidence of acquired left pulmonary artery stenosis during the follow-up period (14.5 +/- 5.8 months). Coil embolization is an effective and safe therapy for PDA. Small residual shunt may be observed immediately after the coil embolization, but will close spontaneously during the follow-up. Recanalization occurred after complete coil occlusion, so careful follow-up with color flow mapping is mandatory.
authors.affiliation: Department of Pediatrics, Juntendo University School of Medicine, Tokyo.
authors.forename: K
authors.initials: K
authors.lastname: Nishimoto
authors.forename: T
authors.initials: T
authors.lastname: Ino
authors.forename: M
authors.initials: M
authors.lastname: Ohkubo
authors.forename: K
authors.initials: K
authors.lastname: Akimoto
authors.forename: K
authors.initials: K
authors.lastname: Yabuta
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D004374:Ductus Arteriosus, Patent / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000628:therapy*; D004621:Embolization, Therapeutic / Q000295:instrumentation; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D011379:Prognosis; D018615:Ultrasonography, Doppler, Color; D018617:Ultrasonography, Doppler, Pulsed