CN101626800A - 用于扩张内腔的支架 - Google Patents
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Abstract
本发明涉及用于腔内扩张的支架。该腔内扩张支架包括内支架A、外支架B和用于将这些支架固定为一个单元的固定线C。将外支架B以这样的方式插在内支架A上,所述方式是使内支架A的间隔部分和外支架B的间隔部分彼此交替,由此内支架的外表面和外支架的内表面彼此紧密接触,且外支架和内支架的两端通过固定线C固定为一个单元。按照本发明的腔内扩张支架,其中内支架A和外支架B中的每一个的形状可复性很优秀,插入腔体内后由于圆柱形薄膜不被固定线C固定所以容易扩张,且内和外支架的间隔部分1d彼此交替重叠,从而可能有效阻止癌细胞等渗透进入腔内。
Description
技术领域
本发明涉及用于腔内扩张的支架,更具体地,涉及这样的用于腔内扩张的支架,其在插入腔内后在形状可复性和扩张性方面很优越,并且内和外支架的间隔部分交替重叠,从而有效阻止癌细胞渗透进入腔内。
背景技术
通常,人体内的腔可以通过人体内的疾病发生而变窄,所以功能降低或在严重的情形中可能无功能。例如,食道由于食道癌变窄,流畅的血液循环由于动脉硬化而变得不可能,或使胆汁从肝脏流出的通路变窄。
在这样的情形中,应该扩张变窄的腔,或应该防止扩张的腔再变窄。作为用于扩张变窄的通路和在该情形中对其进行维持的方法,存在将所谓的支架插入腔内的方法。
通常,作为用于腔内扩张的支架,通常使用用形状记忆合金编织的圆柱形支架,以使其具有多个间隔部分。
优选地,制造具有小的支架间隔部分的单位尺寸的腔内扩张支架以有效阻止血液等渗透进入腔内。但是在制造技术方面存在对制造具有低于一定水平的间隔部分单位尺寸的限制,因为需要大量时间和工作。
而且,用于腔内扩张的支架要求在插入腔内后良好扩张的扩张性和形状可复性。
作为常规的腔内扩张支架,韩国专利公开号2000-002967中公开的腔内扩张支架是公众已知的。该文件中所述的腔内扩张支架包括螺旋支架构件,其中细丝螺旋卷绕,以形成具有一定直径的圆柱形;Z字形支架构件,其中细丝以Z字形卷绕,从而具有大于螺旋支架构件的直径并形成圆柱形;第一覆盖构件,其包裹在螺旋支架构件的内和外表面上;第二覆盖构件,其包裹在Z字形支架构件的内和外表面上;和用于连接所述第一覆盖构件和所述第二覆盖构件的连接构件。
可以缩小以上提及的常规支架,以使其具有更小的直径,因为其由于螺旋支架具有优秀的灵活性,且由于Z字形支架在用于扩张变窄的腔的扩张性方面很优越,和在稳定性方面很优越,因此不易从腔的植入部分移开。然而,它具有缺点,即在插入腔内后扩张性降低,因为第一覆盖构件和第二覆盖构件在连接部分内连成一体,并且存在减小支架各个间隔部分单位尺寸从而阻止癌细胞等渗透进入腔内的限制,和使用它需要大量时间和工作。
另外,作为另一种常规的腔内扩张支架,用于腔内扩张的支架公开在韩国专利登记号No.0561713中。在该专利所述的腔内扩张支架中,将人造管插入,紧密接触由细丝编织的圆柱形内支架的外周从而包括菱形间隔部分,并将与该内支架具有相同结构的外支架插入,紧密接触该人造管的外周,且所有所述的内支架、人造管和外支架均通过固定线固定为一体。
上述常规腔内扩张支架在灵活性和收缩性方面很优越,因为其结构中包含菱形间隔部分。但是它具有这样的问题,即它本身具有很差的恢复和维持其初始形状的形状可复性,插入腔内后由于人造管与内支架和外支架固定为一体而降低扩张性,且因为内支架和外支架以使间隔部分彼此对齐的方式组合,间隔部分的单位尺寸由于这些组合不缩小,因此不可能有效阻止癌细胞等渗透进入腔内。
作为另一种常规的腔内扩张支架,韩国专利登记号No.0448329中公开的腔内扩张支架是公众已知的。该文件中所述的腔内扩张支架包括由形状记忆合金编织而成从而具有多个间隔部分的圆柱形主体,位于该主体两端的具有向外扩张的直径的扩张部分,和包被在所述主体和所述扩张部分的内表面上的膜,其中将由形状记忆合金编织而成的圆柱形辅助体安装在所述主体的外面,该辅助体的一侧粘附于所述主体,且在所述主体和所述辅助体之间形成填充待繁殖的细胞的间隔。
上述常规腔内扩张支架具有优秀的灵活性,因为其具有螺旋结构。但是它本身具有很差的恢复和维持其初始形状的形状可复性,且因为所述主体(内支架)和辅助体(外支架)的间隔部分组合以使得彼此对齐,所以间隔部分的单位尺寸由于这些组合而不缩小,因此它具有不可能有效阻止癌细胞等渗透进入腔内的问题。
发明内容
(有待本发明解决的问题)
因此,本发明的一个目的是提供用于腔内扩张的支架,其中各个内支架A和外支架B的形状可复性很优秀,插入腔体后由于圆柱形薄膜(filmmembrane)不被固定线C固定所以容易扩张,且内和外支架的间隔部分1d彼此交替重叠,从而可以有效阻止癌细胞等渗透进入腔内。
(技术方案)
为了实现以上目的,提供用于腔内扩张的支架,所述支架包括内支架A、外支架B和用于将这些支架固定为一个单元的固定线C,其中所述外支架B以这样的方式插在所述内支架A之上,所述方式是所述内支架A的间隔部分和所述外支架B的间隔部分彼此交替,因此所述内支架的外表面和所述外支架的内表面彼此紧密接触,且所述外支架和内支架的两端通过固定线C固定为一个单元。
(有益效果)
按照本发明的腔内扩张支架,其中各个内支架A和外支架B的形状可复性很优秀,插入腔体后由于圆柱形薄膜(film membrane)不被固定线C固定所以容易扩张,且内和外支架的间隔部分1d彼此交替重叠,从而可以有效阻止癌细胞等渗透进入腔内。
附图简述
本发明优选实施方案的这个和其他目的、特征、方面、和优势将通过结合附图在以下详细说明中得到更完整的描述。在附图中:
图1和图2是显示按照本发明的腔内扩张支架的照片;
图3是显示构成本发明的内和外支架的示意图;
图4是显示本发明的腔内扩张支架在以下状态中观察到的示意图,在所述状态下外支架B插入内支架A,且这些支架的两端通过固定线C固定;
图5(a)和(b)是显示构成本发明腔内扩张支架的内支架和外支架的制备步骤的示意图;和
图6是通过放大本发明的腔内扩张支架的一部分的在以下状态中观察到的照片,在所述状态下外支架B插入内支架A,且这些支架的两端通过固定线C固定。
[附图主要部分的符号说明]
A:内支架 B:外支架
C:固定线 1:第一形状记忆合金丝
2:第二形状记忆合金丝
1a:直线部分 1b:峰部分
1c:谷部分 1d:间隔部分
本发明的最佳实施方式
以下将参考附图详细描述本发明的腔内扩张支架。
本发明的腔内扩张支架包括,如图4中所示,由形状记忆合金丝1和2编织而成从而具有多个间隔部分1d的圆柱形内支架A和外支架B,和用于将这些支架固定为一个单元的固定线C。由于外支架B插在内支架A之上,从而使内支架A的间隔部分和外支架B的间隔部分彼此交替,所以内支架的外表面和外支架的内表面彼此紧密接触。内支架和外支架的两端被固定线C固定为一个单元。
为了更详细描述本发明的具有所述特征的腔内扩张支架,其包括由形状记忆合金丝1和2编织而成的圆柱形内支架A和外支架B,和用于固定这些支架的固定线C,如图1和图4中所示。
图1是按照本发明的腔内扩张支架(无圆柱形薄膜)的照片,且图4是用于腔内扩张的支架的示意图。
图6是一个部分的放大照片,在所述部分中内支架A和外支架B被固定线C固定为一个单元。
本发明公开了用于腔内扩张的支架,其中圆柱形薄膜另外插在内支架A和外支架B之间,如图2中所示。
图2是本发明腔内扩张支架的照片,其另外包括圆柱形薄膜。
上述薄膜由硅树脂等构成,且圆柱形薄膜的材料在本发明中不特别受限。如果将圆柱形薄膜另外插入内支架A和外支架B之间,则在通过固定线C维持内支架A和外支架B的两端的条件下,圆柱形薄膜的两端不固定为一个单元,因此该腔内扩张支架在插入后可以迅速扩张。
换言之,只有内支架A和外支架B的两端被固定线C固定为一个单元。
观察内支架和外支架的结构,如图3中所示,内支架A和外支架B具有多个Z字形的转弯,因此所述第一形状记忆丝1形成多个直线部分1a和通过多个弯曲点连接所述直线部分1a的峰部分1b和谷部分1c。任一个转弯的谷部分缠绕(twin)连接对应于与这个转弯紧邻的转弯的峰部分1d,从而形成多个间隔部分1d。在对角线方向,第二形状记忆丝2具有与第一形状记忆合金丝1以给定间隔缠绕的结构。
图3是显示构成本发明的内支架A和外支架B的结构的示意图。
这些内支架A和外支架B可以通过以下步骤制备:首先用第一形状记忆合金丝1制备Z字形结构的支架,如图5中(a)和(b)中所示,然后第二形状记忆合金丝2与第一形状记忆合金丝1以给定的间隔沿对角线方向缠绕。
图5(a)和(b)是显示制备内支架A和外支架B的步骤的示意图。
本发明的支架在维持其本身初始形状的形状可复性(形状保持性质)方面很优越。
而且,在本发明的支架中,将外支架B插到内支架A之上,所以内支架的外表面和外支架的内表面彼此紧密接触,且内支架的间隔部分和外支架的间隔部分彼此交替排列。因此,该支架的间隔部分的特征在于具有减小的单位尺寸。
本发明,如上所述,具有由此减小的间隔部分的单位尺寸,因此它可以有效阻止癌细胞渗透进入腔内。
内支架A和外支架B的两端在以下条件下被保持:通过固定线C固定为一个单元。
工业适用性
本发明的腔内扩张支架用于在这样的情形中保持腔的扩张,所述情形是食道由于食道癌变窄,由于动脉硬化导致血液循环不流畅,或使胆汁从肝脏流出的通路变窄。
尽管结合附图中举例说明的示范性实施方案描述本发明,但是它仅是例举性的。本领域中的那些技术人员应该理解,多种改进和等价物可以用于本发明。因此,本发明的真正技术范围应该由所附权利要求限定。
Claims (5)
1.用于腔内扩张的支架,其包括内支架A、外支架B和用于将这些支架固定为一个单元的固定线C,其中所述外支架B以这样的方式插在所述内支架A之上,所述方式是使所述内支架A的间隔部分和所述外支架B的间隔部分彼此交替,由此所述内支架的外表面和所述外支架的内表面彼此紧密接触,且所述外支架和内支架的两端通过固定线C固定为一个单元。
2.权利要求1的支架,其还包括插入到所述内支架A和所述外支架B之间的圆柱形薄膜。
3.权利要求2的支架,其中所述圆柱形薄膜由硅树脂构成。
4.权利要求2的支架,其中只有所述内支架A和所述外支架B的两端被固定线C固定为一个单元。
5.权利要求1的支架,其中所述内支架A和外支架B具有多个Z字形的转弯,因此第一形状记忆合金丝1形成多个直线部分1a和通过多个弯曲点连接所述直线部分1a的峰部分1b和谷部分1c;任一个转弯的谷部分缠绕连接对应于与这个转弯紧邻的转弯的峰部分1d,从而形成多个间隔部分1d;且在对角线方向,第二形状记忆合金丝2与所述第一形状记忆丝1以给定间隔缠绕。
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KR1020070024747 | 2007-03-14 | ||
KR1020070024747A KR100847432B1 (ko) | 2007-03-14 | 2007-03-14 | 내강 확장용 스텐트 |
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CN200780052119A Pending CN101626800A (zh) | 2007-03-14 | 2007-10-30 | 用于扩张内腔的支架 |
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US (1) | US20100049302A1 (zh) |
EP (1) | EP2121104A4 (zh) |
JP (1) | JP2010521217A (zh) |
KR (1) | KR100847432B1 (zh) |
CN (1) | CN101626800A (zh) |
WO (1) | WO2008111716A1 (zh) |
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CN105250058B (zh) * | 2015-10-26 | 2017-08-29 | 先健科技(深圳)有限公司 | 管腔编织支架 |
CN105662666A (zh) * | 2015-12-30 | 2016-06-15 | 先健科技(深圳)有限公司 | 管腔支架 |
CN109688983A (zh) * | 2016-08-24 | 2019-04-26 | M.I.泰克株式会社 | 药物释放型生物降解性支架 |
CN111803253A (zh) * | 2020-07-20 | 2020-10-23 | 河南驼人贝斯特医疗器械有限公司 | 一种自膨胀合金支架及其制造方法 |
CN115429484A (zh) * | 2022-08-09 | 2022-12-06 | 上海玮琅医疗科技有限公司 | 一种编织型上腔静脉覆膜支架及其制作工艺 |
Also Published As
Publication number | Publication date |
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JP2010521217A (ja) | 2010-06-24 |
EP2121104A4 (en) | 2014-04-23 |
WO2008111716A1 (en) | 2008-09-18 |
EP2121104A1 (en) | 2009-11-25 |
US20100049302A1 (en) | 2010-02-25 |
KR100847432B1 (ko) | 2008-07-21 |
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