已故的William O. Barnett博士于1979年开始修改Kock袋。他相信大陆储层的概念,但对阀门的相对较高的故障率感到失望。巴内特(Barnett)打算解决这个问题。[注2]他的第一个更改是奶嘴阀的结构。他改变了肠段内的血流方向,以将瓣膜固定在原位。这大大提高了成功率。[注3]此外,他使用一种称为Marlex的塑料材料在阀门周围形成了一个套环。这进一步稳定并支撑了阀门,减少了阀门打滑。该技术效果很好,但是几年后,肠道通过在瓣膜中形成瘘管(异常连接)而对Marlex做出了反应。 Barnett博士继续他的研究,以改善这些结果。经过多方努力,他想到了一个想法-一个由小肠本身构成的“活领”。这种技术使阀门更加稳定,并消除了Marlex轴环带来的问题。
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