The Amender™ ASD occluder is designed for the pertutaneous,transcatheter occlusion of secundum arterial spetal defector patient who have to close their Fontan fenestration. The frame of the occluder uses Nitinol wires as material that shaped into two discs. A waist that fits the size of the defect connects the two discs. Three polyester fabrics insert to help close the hole and provide a foundation for growth of tissue over the occluder after placement. Low profile and weill shaping are considered as two essential parameters in the design of Amender™ occluder. High quality Nitinol material alone with intensive heat processing, ensures the eccellent ability of shape memorizing, which enable the occluder smooth in delivery and deploys completely when released. Intergal Weaving technology is adopted in small and middle sizes Amender™ ASD occluders. ASD occluder over 30mm where a stick-out is needed functionally, are weaved in the traditional way.