Material and Method: 1.Construct a new ventricular septal defect occluder andobserve biocompatibility of nitinol alloy: Nitinol wires were detected by SMA-1analyser and observed by scanning electron microscopy.

• 材料与方法:1.；新型室间隔缺损封堵器的研制及镍钛合金的生物相容性: 采用 SMA-1 型综合分析仪检测镍钛合金丝的超弹性能；扫描电镜观察金属丝表面情况。