PURPOSE: To examine the feasibility of transvenous placement of a new memory-shaped, small, retrievable coil that has a smaller-caliber delivery system than currently available devices, for closure of the patent ductus arteriosus (PDA). METHODS: Through 4 or 5 Fr vascular sheaths and 4 or 5 Fr end-hold catheters, the coils were delivered and placed in piglets (n = 10) with PDA. The coils were made from 0.018" (0.46 mm) or 0.028" (0.71 mm) stainless steel guidewire. Mounted for delivery, the new device has the appearance of a conventional guidewire. This neonatal PDA model was created without major surgery or drugs by stenting the ductus arteriosus. RESULTS: The memory-shaped coils were easily delivered. Coils not optimally placed were retrieved and repositioned. Occlusion of the ductus arteriosus as early as a half-hour after delivery was shown angiographically and confirmed by histopathology. CONCLUSION: This new, small-caliber, simple device was found to be effective for closure of the PDA in this animal model. Longer-term observations are needed.
PURPOSE: To examine the feasibility of transvenous placement of a new memory-shaped, small, retrievable coil that has a smaller-caliber delivery system than currently available devices, for closure of the patent ductus arteriosus (PDA). METHODS: Through 4 or 5 Fr vascular sheaths and 4 or 5 Fr end-hold catheters, the coils were delivered and placed in piglets (n = 10) with PDA. The coils were made from 0.018" (0.46 mm) or 0.028" (0.71 mm) stainless steel guidewire. Mounted for delivery, the new device has the appearance of a conventional guidewire. This neonatal PDA model was created without major surgery or drugs by stenting the ductus arteriosus. RESULTS: The memory-shaped coils were easily delivered. Coils not optimally placed were retrieved and repositioned. Occlusion of the ductus arteriosus as early as a half-hour after delivery was shown angiographically and confirmed by histopathology. CONCLUSION: This new, small-caliber, simple device was found to be effective for closure of the PDA in this animal model. Longer-term observations are needed.
Authors: J W Moore; L George; S E Kirkpatrick; J W Mathewson; R L Spicer; K Uzark; A Rothman; P A Cambier; M C Slack; W C Kirby Journal: J Am Coll Cardiol Date: 1994-03-01 Impact factor: 24.094
Authors: J C Palmaz; G M Richter; G Noeldge; R A Schatz; P D Robison; G A Gardiner; G J Becker; G K McLean; D F Denny; J Lammer Journal: Radiology Date: 1988-09 Impact factor: 11.105