Transcatheter closure of PDA can be accomplished in selected infants weighing <6 kg despite the manufacturer's recommended weight limit of 6 kg for most ductal occluders. The embolization rate is higher than previously reported in larger patients. Retrievability of the occluder and duct morphology needs careful consideration before deciding whether surgical ligation or transcatheter therapy is the better treatment option.
The Valeo stent is low profile, conformable, and easy to deliver, even in small children. It has adequate radial strength to stent pulmonary artery stenoses with minimal recoil. It maintains its geometry on medium term follow up in compliant lesions. Resistant stenoses may distort the stent.
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