Objective: To observe spontaneous closure of atrial septal defects (ASD) in children by echocardiography.
目的：超声随访研究小儿房间隔缺损(asd)的自然愈合。
Conclusion: Transcatheter closure of perimembranous ventricular septal defects with self-made nitinol occluder in children is a safe and effective method.
结论：应用自制双盘状室间隔封堵器经导管闭合小儿膜周部室间隔缺损是一种可行、安全、有效的方法，近期疗效良好。
The reusable inflatable closure plug can be designed and prepared in advance according to caliber, thereby avoiding customization defects of flanges or blind spots.
充气式密封塞可预先根据管径设计制作好，能重复使用，克服了采用法兰或盲头需要定制加工的缺陷。
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