Newly devised expandable metallic stent : A design and fundamental research

1)评价金属支架置入术对气管支气管梗阻及血管梗阻性疾病患者的应用价值。2)在恶性梗阻的情况下，放置支架的一个问题是肿瘤通过支架丝向内生长。为了防止此类并发症的发生，必须开发能够改变支架表面面积的新型支架。与自膨胀金属支架相比，球囊可膨胀金属支架对动脉壁的反应最小。3)反应最小的是金支架，其次是不锈钢、铁氟龙硅胶、银和铜支架，但不锈钢支架在临床使用中是可以接受的。4)提出新设计的球囊式可膨胀金属支架，可通过该支架阻止肿瘤向内生长。

1) The usefulness off metallic stent placement to the patients with tracheobronchial obstruction anf vascular obstructive diseases was evaluated.2) The one problem of stent placement was tumor ingrowth through the stent wire in the case of malignant obstruction. To prevent such complication new stent which can change the area of stent surface must be developed.The reaction of the arterial wall to the balloon expandable metallic stent is minimum compared to the self-expanding mietallic stent.3) The reaction is minimum with the gold stent followed by the stainless steel, Teflon silicone silver and copper stent, in order, however stainless steel stent was acceptable in clinical use.4) The newly devised balloon expandable metallic stent was proposed, which can prevent tumor ingrowth through the stent.