BACKGROUND: Over the last 30 years, several devices have been used for the percutaneous closure of the patent ductus arteriosus (PDA). The Amplatzer Duct Occluder II (ADO II) was developed to address small to moderate PDAs with a double disk and lower profile, which makes implantation easier, without loosing efficacy and safety. The objective of this study is to discuss the technical aspects of this novel prosthesis and present the group's experience with the use of this device METHOD: From September/2009 to March/ 2010, the records of patients with PDAs undergoing percutaneous closure with the ADO II prosthesis which had been diagnosed by transthoracic echocardiograms were analyzed RESULTS: Eight patients were selected. Weight ranged from 8 kg to 78 kg (38.8 ± 24.1 kg). Four PDAs were type E, three were type A and one was type C. Implant was feasible in all cases. The prosthesis used were 5-6 in three cases, 5-4 in two, and 4-6, 6-4 and 6-6 in one case each. Only one patient presented residual flow without a jet immediately after closure, which disappeared in the first followup transthoracic echocardiogram within the first week after procedure. There were no deaths or procedure-related complications CONCLUSION: The ADO II device proved to be safe and effective, even in infants. The retrograde approach made the procedure fast and easy. Occlusion rates are comparable to the ones obtained with ADO I. Further studies with a larger patient sample and longer follow-up times are required to establish the device's safety and efficacy in smaller children.
Ductus arteriosus, patent; Heart catheterization; Prostheses and implants; Heart defects, congenital
