title: Detachable coils for occlusion of patent ductus arteriosus in 2 dogs.
abstract: OBJECTIVE
  To describe the use of a detachable coil for transcatheter closure (TCC) of patent ductus arteriosus (PDA) in 2 dogs.
  
  
  METHODS
  Clinical study.
  
  
  METHODS
  Two female Pembroke Welsh Corgi dogs with PDA.
  
  
  METHODS
  Using fluoroscopic guidance, an 8-mm-diameter coil stent with 5 loops (detachable coils for PDA closure) was inserted via catheterization of the femoral artery. The catheter was passed through the PDA into the pulmonary artery. The coil was withdrawn so that 1.5 loops remained on the pulmonary side of the orifice of the ductus. The rest of the loops were pushed out from the catheter into the ductus. After confirming the correct placement of the coil and the effectiveness of the occlusion, the delivery wire was detached from the coil.
  
  
  RESULTS
  Insertion of the coil was easily performed, even without previous experience. Immediate and marked decrease of the cardiac murmur was auscultated. Only slight residual flow was detected by angiography conducted 3 months' postoperatively. The dogs experienced quick and uneventful recovery after coil placement and required minimal postoperative care. Follow-up evaluation of the dogs showed no functional clinical signs of PDA, and no cardiac abnormalities were detected on electrocardiographic, phonocardiographic, and echocardiographic examination. In dog 1, the residual flow had disappeared on the color-flow Doppler echocardiographic examination at 18 months' postoperatively.
  
  
  CONCLUSIONS
  TCC using a detachable coil was easy, safe, and effective in 2 dogs with PDA. The minimal residual shunting observed only by echocardiography seemed hemodynamically insignificant.
  
  
  CONCLUSIONS
  This method can be used as an alternative to traditional surgical methods.
authors.affiliation: Department of Veterinary Surgery, Faculty of Agriculture, Tokyo University of Agriculture & Technology, Tokyo, Japan.
authors.forename: R
authors.initials: R
authors.lastname: Tanaka
authors.forename: K
authors.initials: K
authors.lastname: Hoshi
authors.forename: Y
authors.initials: Y
authors.lastname: Nagashima
authors.forename: Y
authors.initials: Y
authors.lastname: Fujii
authors.forename: Y
authors.initials: Y
authors.lastname: Yamane
mesh_terms: D000818:Animals; D004283:Dog Diseases / Q000601:surgery*; D004285:Dogs; D004374:Ductus Arteriosus, Patent / Q000601:surgery / Q000662:veterinary*; D005260:Female; D015607:Stents / Q000662:veterinary*; D019616:Thoracic Surgical Procedures / Q000295:instrumentation / Q000379:methods / Q000662:veterinary