结论永久性部分覆膜镍钛合金内支架置入术是消化道恶性梗阻和食管-支气管瘘的有效治疗方法，操作简便，安全性高。
Conclusion it is an effective, easy and safe method to treat malignant obstruction of digestive tract or esophago-bronchial fistula using partially covered nickel-titanium alloy stent.
永久磁铁和动触头固定在摆动板上，摆动板可偏转，顶端通过弹簧吊置在线圈支架上。
A permanent magnet and a moving contact are fixed on a swing plate which can deflect, and the top end of the swing plate is hung on a coil brace through a spring.
生物可降解支架从理论上克服了永久性支架的缺点，具有很大的临床应用前景。
Biodegradable stent has theoretical capability to solve these problems and acquires a bright future.
生物可降解支架从理论上克服了永久性支架的缺点，具有很大的临床应用前景。
Biodegradable stent has theoretical capability to solve these problems and acquires a bright future.
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