title: Coil occlusion of patent ductus arteriosus.
abstract: 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 >or=2.5 mm.
  
  
  RESULTS
  A retrospective survey of the outcome of coil occlusions for PDA >or=2.5 mm before and after the 0.052-inch coil became available found that (1) the frequency of PDA >or=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 >or=4 mm significantly increased with the 0.052-inch coil (p<0.01). Complete occlusion was achieved once deployment was successful.
  
  
  CONCLUSIONS
  Introduction of the 0.052-inch coil decreased complicated coil occlusion deployment for PDA >or=2.5 mm, and contributed to a better likelihood of coil occlusion for PDA >or=4 mm.
authors.affiliation: Department of Pediatrics, Sapporo Medical University School of Medicine, Japan. tomitah@sapmed.ac.jp
authors.forename: Hideshi
authors.initials: H
authors.lastname: Tomita
authors.forename: Motoki
authors.initials: M
authors.lastname: Takamuro
authors.forename: Shigeto
authors.initials: S
authors.lastname: Fuse
authors.forename: Norihisa
authors.initials: N
authors.lastname: Horita
authors.forename: Kinya
authors.initials: K
authors.lastname: Hatakeyama
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Tsutsumi
authors.forename: Satoshi
authors.initials: S
authors.lastname: Yazaki
authors.forename: Shigeyuki
authors.initials: S
authors.lastname: Echigo
authors.forename: Kohji
authors.initials: K
authors.lastname: Kimura
mesh_terms: D021721:Balloon Occlusion / Q000295:instrumentation / Q000379:methods*; D006328:Cardiac Catheterization; D004374:Ductus Arteriosus, Patent / Q000628:therapy*; D004867:Equipment Design; D006801:Humans; D007564:Japan; D015999:Multivariate Analysis; D016017:Odds Ratio; D012044:Regression Analysis; D015203:Reproducibility of Results; D012189:Retrospective Studies; D012449:Safety; D016896:Treatment Outcome