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自９０年代初自扩张金属支架（Ｓｅｌｆ－ｅｘｐａｎｄｉｎｇ ｍｅｔａｌｓｔｅｎｔ，ＳＥＭＳ）应用以来，随着金属支架置入术的不断开展，金属支架的缺点和并发症亦日渐增多，支架置入后梗阻引起再发吞咽困难是最常见的主要并发症之一。作者自１９９５年３月至１９９９年８月
Since the application of self-expanding metal stents (SEMS) in the early 90s, with the continuous development of metal stents, the shortcomings and complications of metal stents have also increased. After the stents are inserted, obstruction causes recurrent swallowing. Difficulty is one of the most common major complications. Author from March 1995 to August 1999