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CN107411859B - 用于植入血管扩张器的工具 - Google Patents

用于植入血管扩张器的工具 Download PDF

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CN107411859B
CN107411859B CN201710548057.9A CN201710548057A CN107411859B CN 107411859 B CN107411859 B CN 107411859B CN 201710548057 A CN201710548057 A CN 201710548057A CN 107411859 B CN107411859 B CN 107411859B
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CN107411859A (zh
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殷月慧
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Cao Wei
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Qingdao Yijianuo Aily Chemical Co Ltd
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2002/821—Ostial stents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
    • A61F2/962—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve
    • A61F2/966—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
    • A61F2002/9665—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod with additional retaining means

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Abstract

本发明涉及心血管医疗器具技术领域，具体说是用于植入血管扩张器的工具。包括滑轨、插装在滑轨中可轴向移动的推杆，所述推杆的后端设置有齿轮齿条啮合的轴向推进机构，所述推杆上套装有螺旋夹套，所述螺旋夹套是由异形单丝螺旋状盘绕而成，所述异形单丝截面的上、下两端对称设置有上夹持螺旋和下夹持螺旋，异形单丝的一端固定连接在推杆的前端，异形单丝的另一端固定连接在滑轨上。该工具结构简单、操作方便、应用范围广泛。

Description

用于植入血管扩张器的工具
技术领域
本发明涉及心血管医疗器具技术领域，具体说是用于植入血管扩张器的工具。
背景技术
目前，常用的心血管扩张手术主要是安装支架或者球囊，由于心血管管道比较细，手术过程中操作很麻烦。支架的安装和位置的调整都要花费大量时间和精力，给手术带来难度和风险。中国专利2010202319042公开了一种《心血管扩张装置》将网状支架事先安装在一个导引管中，同时在导引管中还安装一个管芯，手术时先将导引管植入血管，再利用管芯将网状支架推出来。这种“心血管扩张装置”虽然可以一定程度地简化手术操作，提高网状支架到位的准确度，但由于导引管的直径大于网状支架的直径，其适用范围受到限制，有时候也会增加手术的难度；另一中国专利2013200482005公开了一种《心血管扩张装置》，其采用单丝螺旋缠绕形成的螺旋管式扩张器，并在螺旋管的内腔中设置有支撑杆，在支撑杆的前端设置有固定叉，支撑杆的中段设置有定位孔，将单丝紧密缠绕在支撑杆上，单丝的两端分别插装在固定叉和定位孔中，放进血管以后，松开单丝的两端，抽出支撑杆，单丝直径自动扩张，起到扩张和支撑血管壁的作用，其结构简单、操作方便、应用范围广泛。但由于其支撑杆为一体式的固定结构，在支撑杆上安装和释放单丝两端的操作非常困难，在抽出支撑杆的过程中容易将半释放状态的单丝带出来，造成手术失败。
发明内容
本发明的目的是提供一种结构简单、操作方便的用于植入血管扩张器的工具。
为了达到以上目的，本发明所采用如下的技术方案：用于植入血管扩张器的工具包括滑轨、滑动安装在滑轨中的推杆，所述推杆的后端设置有齿条，所述推杆上套装有螺旋夹套，所述螺旋夹套是由异形单丝螺旋状盘绕而成的螺旋结构，所述异形单丝的部分截面对应圆形轮廓，异形单丝上、下两侧面对称设置有上夹持螺旋和下夹持螺旋，所述上夹持螺旋和下夹持螺旋是截面形状为三角形的螺旋凸肋，所述上夹持螺旋和下夹持螺旋的轴线与螺旋夹套的轴线平行设置，异形单丝的一端固定连接在推杆的前端，异形单丝的另一端固定连接在滑轨上；所述滑轨上安装有啮合齿条的齿轮；所述齿轮上固定设置有手柄。
所述推杆的截面为矩形，所述齿轮通过转轴安装在滑轨的侧壁上。
所述异形单丝的上、下两侧面对称设置有下凹的弧形槽，所述上夹持螺旋和下夹持螺旋设置在弧形槽中。
本发明的有益效果在于：螺旋夹套利用两侧的上夹持螺旋和下夹持螺旋夹住同样螺旋形状的血管扩张器，使其处于压缩、拧紧的状态，管径较小，方便植入血管的操作；植入以后，推拉手柄，通过推杆拉伸螺旋夹套，又可以很方便地释放扩张器，将该工具取出，其结构简单、操作方便、应用范围广泛。
附图说明
图1为本发明一个实施例的结构示意图。
图2是血管扩张器的结构示意图。
图3是夹持血管扩张器时的结构示意图。
图4是异形单丝的剖面视图。
图5是异形单丝另一实施例的剖面视图。
具体实施方式
如图1所示，本发明所述用于植入血管扩张器的工具包括滑轨1、滑动安装在滑轨1中的推杆2，所述推杆2的后端设置有齿条3，推杆2可以在滑轨1中轴向滑动。所述推杆2上套装有螺旋夹套4，所述螺旋夹套4是由异形单丝螺旋状盘绕而成的螺旋结构，螺旋夹套4的材质采用有弹性的塑料、不锈钢等制成。所述异形单丝的部分截面对应圆形轮廓，异形单丝上、下两侧面对称设置有上夹持螺旋5和下夹持螺旋6，所述上夹持螺旋5和下夹持螺旋6是截面形状为三角形的螺旋凸肋，所述上夹持螺旋5和下夹持螺旋6的轴线与螺旋夹套4的轴线平行设置。上夹持螺旋5和下夹持螺旋6可以如图4所示直接设置在圆柱体的外表面，也可以如图5所示，在异形单丝的上、下两侧面对称设置有下凹的弧形槽10、11，所述上夹持螺旋5和下夹持螺旋6设置在弧形槽10、11中。
异形单丝的一端固定连接在推杆2的前端，异形单丝的另一端固定连接在滑轨1上；所述滑轨1上安装有啮合齿条3的齿轮9；所述齿轮9上固定设置有手柄91。所述推杆2的截面为矩形，所述齿轮9通过转轴安装在滑轨1的侧壁上。推拉手柄91的时候，齿轮9通过齿条3带动推杆2轴向移动。
如图2所示，配合使用的血管扩张器由柱状单丝8螺旋盘绕而成，所述单丝8的上、下两侧对称设置有卡槽81、82，所述卡槽81、82的截面为等腰三角形，与异形单丝上的上夹持螺旋5和下夹持螺旋6的截面形状相匹配；卡槽81、82形成的柱状螺旋体与单丝8形成的柱状螺旋体同轴。并且卡槽81、82的轴线与单丝8的轴线平行。
如图3所示，构成扩张器本体的单丝8夹持在构成螺旋夹套4的异形单丝的螺旋间隙中。上夹持螺旋5和下夹持螺旋6对应嵌入卡槽81、82中，单丝8虽有扩张的弹性，但受到异形单丝的夹持，无法脱离。
另外，所述滑轨1的内壁上设置有轴向设置的键槽，所述推杆2上设置有匹配该键槽的花键。这样可以通过键槽限定推杆2只能轴向移动而不能旋转，同时还可以通过合理设置键槽的长度限定推杆2轴向移动的范围。
如图3所示，使用时，将螺旋式血管扩张器的单丝卡装在上夹持螺旋5和下夹持螺旋6之间，由于螺旋夹套4的螺距——即上夹持螺旋5和下夹持螺旋6之间的距离——小于螺旋扩张器单丝的直径，上夹持螺旋5和下夹持螺旋6嵌入卡槽81、82中，此时螺旋夹套4可以夹住扩张器使其不会松脱，可以很方便地植入血管中。扩张器插入病人血管以后，推拉手柄91，通过推杆2拉伸螺旋夹套4，螺旋夹套4的螺间距扩大，上夹持螺旋5和下夹持螺旋6从卡槽81、82中脱离，此时即可释放扩张器，扩张器被释放以后其直径扩大，支撑在病人血管壁上，此时即可将该夹持工具取出。

Claims (1)

1.用于植入血管扩张器的工具，包括滑轨（1）、滑动安装在滑轨（1）中的推杆（2），所述推杆（2）的后端设置有齿条（3），其特征在于：所述推杆（2）上套装有螺旋夹套（4），所述螺旋夹套（4）是由异形单丝螺旋状盘绕而成的螺旋结构，所述异形单丝的部分截面对应圆形轮廓，异形单丝上、下两侧面对称设置有上夹持螺旋（5）和下夹持螺旋（6），所述上夹持螺旋（5）和下夹持螺旋（6）是截面形状为三角形的螺旋凸肋，所述上夹持螺旋（5）和下夹持螺旋（6）的轴线与螺旋夹套（4）的轴线平行设置，异形单丝的一端固定连接在推杆（2）的前端，异形单丝的另一端固定连接在滑轨（1）上；所述滑轨（1）上安装有啮合齿条（3）的齿轮（9）；所述齿轮（9）上固定设置有手柄（91）；所述推杆（2）的截面为矩形，所述齿轮（9）通过转轴安装在滑轨（1）的侧壁上。
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