WO2011095089A1 - 一种医用导丝 - Google Patents

一种医用导丝 Download PDF

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Publication number
WO2011095089A1
WO2011095089A1 PCT/CN2011/070562 CN2011070562W WO2011095089A1 WO 2011095089 A1 WO2011095089 A1 WO 2011095089A1 CN 2011070562 W CN2011070562 W CN 2011070562W WO 2011095089 A1 WO2011095089 A1 WO 2011095089A1
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WO
WIPO (PCT)
Prior art keywords
metal core
medical
guide wire
medical guidewire
stepped structure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2011/070562
Other languages
English (en)
French (fr)
Inventor
李�雨
金巧蓉
王森
谢志永
罗七一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Microport Medical Shanghai Co Ltd
Original Assignee
Microport Medical Shanghai Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Microport Medical Shanghai Co Ltd filed Critical Microport Medical Shanghai Co Ltd
Priority to JP2012551487A priority Critical patent/JP6116911B2/ja
Priority to EP11739368.6A priority patent/EP2532381B1/en
Priority to US13/521,300 priority patent/US20130023853A1/en
Publication of WO2011095089A1 publication Critical patent/WO2011095089A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A61M2025/09058—Basic structures of guide wires
    • A61M2025/09083—Basic structures of guide wires having a coil around a core
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A61M2025/09166—Guide wires having radio-opaque features
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A61M2025/09175—Guide wires having specific characteristics at the distal tip

Definitions

  • the present application relates to the field of medical devices, and in particular to a medical guide wire. Background technique
  • the implanted device In arterial vascular interventional procedures, the implanted device is typically delivered to the lesion of the vessel to reconstitute the vessel wall. Delivery of the implanted device is typically accomplished using a guidewire in conjunction with a medical catheter.
  • Prior art guidewires generally include: a reduced diameter metal core, a developed and/or undeveloped helical wire covered by a distal end of the metal core, and a boss disposed on the metal core.
  • the embodiment of the present application provides a medical guide wire to completely transport the implanted device into a blood vessel of a human body, and the technical solution is as follows:
  • a medical guide wire for transporting an implanted device comprising: a metal core, a spiral wire, a conveying member and a boss, wherein:
  • the metal core is a variable diameter structure, and has a linear structure, a stepped structure and a linear structure from a proximal end to a distal end;
  • the spiral wire is one or more, and is fixed on the linear structure and the stepped structure at the distal end of the metal core;
  • the conveying element is one or more fixed to the metal core stepped structure; the boss is fixed on the metal core stepped structure behind the conveying element.
  • the medical guidewire further comprises: a tethering element disposed on the metal core for binding the head end of the implant device.
  • the medical guidewire further comprises: a protective sleeve disposed on the metal core stepped structure behind the boss.
  • the diameter of the stepped structure gradually decreases from the proximal end to the distal end.
  • the stepped structure consists of one or more cylinders of decreasing diameter.
  • the central portion of the metal core is composed of three cylindrical bodies whose diameter is gradually reduced.
  • the material of the spiral wire is a developing material.
  • the structure of the conveying element is a helical structure.
  • the conveying member is a polymer material strip film, a metal wire or a hollow polymer material tube.
  • the polymeric material is a thermoplastic elastomer material.
  • thermoplastic elastomer material is polyurethane, polyethylene or rubber.
  • the transport element is secured to the metal core by heat shrink, solder or glue bond placement.
  • the structure of the boss is an annular structure having a certain thickness.
  • the material of the boss is a developing material.
  • the tethering element is a spring.
  • the tethering element is secured to the metal core by a nut or weld.
  • the protective sleeve is a spring.
  • the protective sleeve is fixed to the metal core by welding or bonding.
  • the developing material is gold, ruthenium, tungsten, platinum or rhodium.
  • the metal core of the medical guide wire is provided with a plurality of conveying elements.
  • the conveying element When conveying, the conveying element is frictionally implanted into the inner wall of the instrument, and the thrust is provided in sections, so that the implanted device is provided.
  • the uniform resistance is avoided, and the bending of the medical catheter is avoided, so that the implanted device is subjected to excessive resistance during transportation, which causes wrinkles and deformation of the implanted device, thereby completely transferring the implanted device into the human lumen through the medical catheter. .
  • the position of the implanted device When the position of the implanted device is not ideal, it can also pass through the transport element on the medical guide wire.
  • the inner wall of the friction implant device provides resilience and realigns the position of the implanted device.
  • a binding element is disposed on the medical guide wire to bind the distal end of the implanted instrument to the metal core of the medical guide wire to prevent damage and/or scratching of the head end of the implanted instrument during transport.
  • the inner wall of the medical catheter reduces the resistance to the implanted device during delivery and facilitates delivery of the implanted device in the medical catheter.
  • FIG. 1 is a schematic structural view of a medical guide wire according to Embodiment 1 of the present application.
  • FIG. 2 is a schematic structural view of a medical guide wire metal core according to an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a medical guide wire according to Embodiment 2 of the present application. detailed description
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • FIG. 1 is a schematic structural view of a medical guide wire according to Embodiment 1 of the present application.
  • the medical guide wire comprises: a metal core 1, a spiral wire 2, a conveying member 3 and a boss 4, wherein the metal core 1 is a variable diameter structure for supporting the implanted device during transport (not shown)
  • the spiral wire 2 includes a distal end portion 2-1 and a proximal end portion 2-2, respectively fixed on the distal linear structure and the intermediate stepped structure of the metal core 1, for positioning the implanted device during transport, and transporting
  • the component 3 also includes a distal end portion 3-1 and a proximal end portion 3-2 which are respectively fixed on the intermediate stepped structure of the metal core 1 for providing thrust or recovery force to the implanted device during transport, and the boss 4 is round Ring structure, fixed to metal core 1
  • the intermediate stepped structure is positioned behind the proximal end portion 3-2 of the delivery element for providing thrust to the implanted device during delivery.
  • the implant device of the medical guide wire is not particularly limited, and is preferably an implant device well known to those skilled in the art, including but not limited to a blood vessel stent, a bile duct stent and a metal core of the esophagus.
  • the shaft may be ground by one of stainless steel, nickel-titanium alloy, copper alloy, aluminum alloy, or the like, or may be welded or bonded by several of them. As shown in Fig.
  • the structure of the metal core 1 is from the proximal end to the distal end: a linear structure 1-3, a stepped structure 1-2, and a linear structure 1-1, wherein the diameter of the intermediate stepped structure 1-2
  • the structure is gradually reduced from the proximal end to the distal end, and the structure having a gradually decreasing diameter can be realized by one or more steps of a stepped structure in which the diameter is gradually reduced by d.
  • the step of the metal core 1 is stepped.
  • the structure consists of three segments.
  • the metal core 1 is typically reduced from a proximal linear structure diameter of 0.012 0.020 inches to a distal linear diameter of 0.002 0.012 inches, and the diameter of the proximal linear structure preferably ranges from 0.012 to 0.016 inches.
  • the diameter of the distal linear structure preferably ranges from 0.002 ⁇ 0.005 inches.
  • the length of the proximal linear structure of the metal core 1 is 1500 to 2000 mm, preferably 1800 to 2000 mm; and the length of the stepped structure is 300.
  • the preferred range of ⁇ 550mm is 400 550mm, and the length of the distal end is 10 30mm.
  • the proximal linear structure has a diameter of 0.019 inches and a length of 1980 mm; the stepped structure has a length of 450 mm; and the distal linear structure has a diameter of 0.003 inches and a length of 15 mm.
  • the material of the spiral wire 2 is one or more of radiopaque developing materials such as gold, ruthenium, tungsten, platinum or rhodium.
  • the distal end portion 2-1 of the spiral wire is coated on the distal linear structure of the metal core 1 for positioning the distal end of the implanted instrument, that is, at the proximal end of the distal end portion 2-1 of the helical wire during delivery The locations of the distal ends of the implanted instruments overlap.
  • the proximal portion 2-2 of the helical wire is overlaid on the stepped structure of the metal core 1 and is positioned corresponding to the central position of the implanted instrument for positioning the central location of the implanted device.
  • the winding length of each portion of the spiral wire 2 is 0 to 30 mm. In the embodiment of the present application, the optimum winding length of each portion is 15 mm.
  • the conveying member 3 is a polymer strip film having a spiral structure, a wire or a hollow polymer tube, preferably a polymer film or a polymer tube having high elasticity and a high coefficient of friction, by heat shrinkage, welding or adhesive bonding. It is fixed to the stepped structure of the metal core 1. Selected polymer materials are available It is considered to be one or more of thermoplastic elastomers such as polyurethane, polyethylene or rubber.
  • the distal end portion 3-1 and the proximal end portion 3-2 of the conveying member have a covering length of 5 to 8 mm and 12 to 15 mm, respectively, and an outer diameter of 0.2 to 1.2 mm.
  • the transporting element 3 When transporting, the transporting element 3 is frictionally bound to the implanting device on the metal core 1 to provide the implanting device with a uniform thrust from the proximal end to the distal end. In the same manner, when the transporting position is not ideal, Provides resilience to the implanted device and realigns the position of the implanted device.
  • the boss 4 is a ring having a certain wall thickness, and the material is a developing material for providing a main thrust to the implanted device when transporting, and the developing design is for positioning the proximal end of the implanted instrument to ensure the delivery of the implanted device. Can be fully released.
  • the medical guide wire further comprises: a restraining element 5 and a protective sleeve 6, wherein: the binding element 5 is disposed on the metal core 1 at a position overlapping with the distal end of the implanted instrument for binding At the head end of the instrument, the protective cover 5 is disposed on the stepped structure of the metal core 1 behind the boss for preventing the metal core 1 from being bent.
  • the tethering element 5 is a spring, and the material of the spring is a developing material, which is fixed to the metal core 1 by a nut or a welding method for binding the head end of the implanted instrument, and can prevent the head of the implanted instrument during the conveying process.
  • the end damages and/or scratches the inner wall of the medical catheter and reduces the resistance to the implanted device during delivery, facilitating delivery of the implanted device.
  • the metal core of the medical guide wire is provided with a plurality of conveying elements. When conveying, the conveying element is frictionally implanted into the inner wall of the instrument, and the thrust is provided in sections, so that the resistance of each section of the implanted device is uniform. The bending of the medical catheter is prevented, and the implanted device is subjected to excessive resistance during transportation, which causes wrinkles and deformation of the implanted device, thereby completely transporting the implanted device into the human lumen through the medical catheter.
  • the recovery force can be provided by the transport member on the medical guide wire, and the inner wall of the friction implant device can be re-adjusted to adjust the position of the implanted device.
  • a binding element is disposed on the medical guide wire to bind the distal end of the implanted instrument to the metal core of the medical guide wire to prevent damage and/or scratching of the head end of the implanted instrument during transport.
  • the inner wall of the medical catheter reduces the resistance to the implanted device during delivery and facilitates delivery of the implanted device in the medical catheter.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
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Description

一种医用导丝
技术领域
本申请涉及医疗器械领域， 特別是涉及一种医用导丝。 背景技术
在动脉血管介入性手术中， 通常将植入器械输送到血管的病变部位， 重 构动脉血管壁。 植入器械的输送通常采用导丝配合医疗导管来实现。 现有的 导丝一般包括： 变径金属芯、 金属芯远端覆盖的显影和 /或不显影的螺旋丝和 设置在金属芯上的凸台。 输送时， 首先将医疗导管插入病变血管中， 再将植 入器械束縛套在导丝上， 利用导丝上的凸台推送植入器械进入医疗导管， 进 而到达血管病变处。
通过对现有技术的研究， 申请人发现现有的导丝上只有凸台提供推力， 在输送植入器械时， 医疗导管的弯曲程度会随着迂曲的血管变化， 在血管迂 曲程度较大的位置， 植入器械输送时遇到的阻力较大， 此时很容易造成植入 器械发生褶皱、 变形， 导致无法完成输送过程或输送后植入器械无法较好地 贴合在血管内壁上， 影响手术效果。 发明内容
为解决上述技术问题， 本申请实施例提供一种医用导丝， 以实现完整地 将植入器械输送到人体血管内， 技术方案如下：
一种医用导丝， 用于输送植入器械， 包括： 金属芯、 螺旋丝， 输送元件 和凸台， 其中：
所述金属芯为变径结构， 从近端到远端分别为直线状结构、 阶梯状结构 和直线状结构；
所述螺旋丝为一个或多个， 固定在所述金属芯远端直线状结构和阶梯状 结构上；
所述输送元件为一个或多个， 固定在所述金属芯阶梯状结构上； 所述凸台固定在所述输送元件之后的所述金属芯阶梯状结构上。 优选地 该医用导丝进一步包括： 束缚元件， 设置在所述金属芯上， 用 于束缚所述植入器械的头端。
优选地 该医用导丝进一步包括： 保护套， 设置在所述凸台之后的所述 金属芯阶梯状结构上。
优选地 所述阶梯状结构的直径从近端到远端逐渐减小。
优选地 所述阶梯状结构由一个或多个直径逐渐减小的圓柱体组成。 优选地 所述金属芯中节部分由 3个直径逐渐减小的圆柱体組成。
优选地 所述螺旋丝的材料为显影材料。
优选地 所述输送元件的结构为螺旋结构。
优选地 所述输送元件为高分子材料条状膜、 金属丝或中空的高分子材 料管。
优选地 所述高分子材料为热塑性弹性体材料。
优选地 所述热塑性弹性体材料为聚氨酯、 聚乙烯或橡胶。
优选地 所述输送元件通过热收缩、 焊接或胶粘结的放置固定在所述金 属芯上。
优选地 所述凸台的结构为具有一定厚度的环状结构。
优选地 所述凸台的材料为显影材料。
优选地 所述束缚元件为弹簧。
优选地 所述束缚元件通过螺帽或焊接固定在所述金属芯上。
优选地 所述保护套为弹簧。
优选地 所述保护套通过焊接或粘结的方式固定在所述金属芯上。
优选地 所述显影材料为黄金、 铱、 钨、 铂金或钽。 由以上本申请实施例提供的技术方案可见， 医用导丝的金属芯上设置有 多个输送元件， 输送时， 该输送元件通过摩擦植入器械的内壁， 分节提供推 力， 使植入器械每节受到的阻力均匀， 避免了由于医疗导管的弯曲， 使植入 器械输送时受到阻力过大， 导致植入器械发生褶皱、 变形， 从而完整地将植 入器械通过医疗导管输送到人体管腔内。
在植入器械的输送的位置不理想时， 还可以通过医用导丝上的输送元件， 摩擦植入器械内壁提供回收力， 对植入器械的位置进行重新调整。
同时， 在该医用导丝上还设置有束缚元件， 将植入器械远端头部束缚在 医用导丝的金属芯上， 防止在输送过程中， 植入器械的头端损坏和 /或刮伤医 疗导管内壁， 并减少了输送时植入器械受到的阻力， 有利于植入器械在医疗 导管中的输送。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案， 下面将对实 施例或现有技术描述中所需要使用的附图作简单地介绍， 显而易见地， 下面 描迷中的附图仅仅是本申请中记载的一些实施例， 对于本领域普通技术人员 来讲， 在不付出创造性劳动的前提下， 还可以根据这些附图获得其他的附图。
图 1为本申请实施例一提供的一种医用导丝的结构示意图；
图 2为本申请实施例医用导丝金属芯的结构示意图；
图 3为本申请实施例二提供的一种医用导丝的结构示意图。 具体实施方式
为了使本技术领域的人员更好地理解本申请中的技术方案， 下面将结合 本申请实施例中的附图， 对本申请实施例中的技术方案进行清楚、 完整地描 述， 显然， 所描述的实施例仅仅是本申请一部分实施例， 而不是全部的实施 例。 基于本申请中的实施例， 本领域普通技术人员在没有做出创造性劳动前 提下所获得的所有其他实施例， 都应当属于本申请保护的范围。
实施例一：
图 1为本申请实施例一提供的一种医用导丝的结构示意图。
如图所示， 该医用导丝包括： 金属芯 1、 螺旋丝 2、 输送元件 3和凸台 4, 其中， 金属芯 1为变径结构， 用于输送时支撑植入器械（图中未示出）， 螺旋 丝 2包括远端部分 2-1和近端部分 2-2, 分别固定在金属芯 1的远端直线状结 构和中间阶梯状结构上， 用于输送时定位植入器械， 输送元件 3 也包括远端 部分 3-1和近端部分 3-2, 分别固定在金属芯 1的中间阶梯状结构上， 用于输 送时给植入器械提供推力或回收力， 凸台 4 为圓环状结构， 固定在金属芯 1 的中间阶梯状结构上，位置在输送元件近端部分 3-2之后，用于输送时给植入 器械提供推力。
本申请实施例对医用导丝所输送的植入器械没有特殊限制， 优选为本领 域技术人员熟知的植入器械， 包括但不局限于血管支架、 胆管支架和食管支 金属芯 1 为变径芯轴， 可以由不锈钢、 镍钛合金、 铜合金、 铝合金等材 料中的一种研磨而成， 也可以由其中几种焊接或粘结而成。 如图 1 所示， 金 属芯 1的结构从近端到远端分别： 直线状结构 1-3、 阶梯状结构 1-2和直线状 结构 1—1， 其中中间阶梯状结构 1-2的直径是从近端到远端逐渐减小， 这种直 径逐渐变小的结构， 可以由一段或多段直径逐渐减 d、的阶梯状结构来实现， 在本申请实施例中金属芯 1中间的阶梯状结构由三段组成。
根据输送时血管的迂曲程度， 金属芯 1通常从 0.012 0.020英寸的近端直 线状结构直径减小到 0.002 0.012英寸的远端直线状结构直径， 近端直线状结 构的直径优选范围为 0.012 0.016 英寸， 远端直线状结构的直径优选范围在 0.002^0.005 英寸范围内， 另外， 金属芯 1 的近端直线状结构的长度为 1500~2000mm，优选范围在 1800~2000mm;阶梯状结构的长度为 300~550mm 优选范围在 400 550mm， 远端直线状长度为 10 30mm。 本申请实施例中， 近 端直线状结构的直径为 0.019 英寸， 长度为 1980mm; 阶梯状结构的长度为 450mm; 远端直线状结构的直径 0.003英寸， 长度为 15mm
螺旋丝 2 的材料为黄金、 铱、 钨、 铂金或钽等辐射透不过的显影材料中 的一种或几种。螺旋丝远端部分 2-1包覆在金属芯 1的远端直线状结构上，用 于定位植入器械的远端，也就是在输送时， 螺旋丝远端部分 2-1的近端与植入 器械远端所处位置相重叠。螺旋丝近端部分 2-2包覆在金属芯 1的阶梯状结构 上， 其位置与输送的植入器械的中心位置相对应， 用于定位植入器械的中心 位置。 螺旋丝 2的每部分的缠绕长度在 0~30mm， 本申请实施例中， 其每部分 最优的缠绕长度为 15mm
输送元件 3 为螺旋状结构的高分子条状膜、 金属丝或中空的高分子管， 优选为具有高弹性和高摩擦系数的高分子膜或高分子管， 通过热收缩、 焊接 或胶粘结的方式将其固定在金属芯 1 的阶梯状结构上。 所选的高分子材料可 以为聚氨酯、 聚乙烯或橡胶等热塑性弹性体中的一种或几种。 输送元件的远 端部分 3-1和近端部分 3-2的覆盖长度分别为 5~8mm和 12~15mm， 外径在 0.2-1.2mm范围内。在输送时，输送元件 3通过摩擦束缚在金属芯 1上的植入 器械， 给植入器械提供从近端到远端的均勾推力， 在输送位置不理想时， 还 可以以相同的方式， 给植入器械提供回收力， 对植入器械的位置重新调整。
凸台 4 为具有一定壁厚的环， 其材料为显影材料， 用于输送时， 给植入 器械提供主要推力， 它的显影设计是用来定位植入器械近端， 确保植入器械 输送后能够全部释放。
此外， 本领域技术人员应该知道， 上述螺旋丝和输送元件由前端部分和 近端部分两部分组成， 只是本申请的一种实现方式， 在其它实施例中， 它们 两者还可以由多段组成， 这里不应构成对本申请的限制。 实施例二：
如图 2所示， 该医用导丝还包括： 束縛元件 5和保护套 6, 其中： 束縛元 件 5设置在金属芯 1上， 位置与植入器械远端所处位置相重叠， 用于束缚植 入器械的头端， 保护套 5设置在凸台之后的金属芯 1的阶梯状结构上， 用于 防止金属芯 1发生弯折。
束缚元件 5 为弹簧， 且弹簧的材料为显影材料， 通过螺帽或焊接的方式 固定在金属芯 1 上， 用于束縛植入器械的头端， 可以防止在输送过程中， 植 入器械的头端损坏和 /或刮伤医疗导管内壁， 并减少了输送时植入器械受到的 阻力， 有利于植入器械的输送。 本申请实施例中， 医用导丝的金属芯上设置有多个输送元件， 输送时， 该输送元件通过摩擦植入器械的内壁， 分节提供推力， 使植入器械每节受到 的阻力均匀， 避免了由于医疗导管的弯曲， 使植入器械输送时受到阻力过大， 导致植入器械发生褶皱、 变形， 从而完整地将植入器械通过医疗导管输送到 人体管腔内。
在植入器械的输送的位置不理想时， 还可以通过医用导丝上的输送元件， 摩擦植入器械内壁提供回收力， 对植入器械的位置进行重新调整。 同时， 在该医用导丝上还设置有束缚元件， 将植入器械远端头部束縛在 医用导丝的金属芯上， 防止在输送过程中， 植入器械的头端损坏和 /或刮伤医 疗导管内壁， 并减少了输送时植入器械受到的阻力， 有利于植入器械在医疗 导管中的输送。
以上所述仅是本申请的具体实施方式， 应当指出， 对于本技术领域的普 通技术人员来说， 在不脱离本申请原理的前提下， 还可以做出若干改进和润 饰， 这些改进和润飾也应视为本申请的保护范围。

Claims

权利要求
1、 一种医用导丝， 用于输送植入器械， 其特征在于， 包括： 金属芯、 螺 旋丝， 输送元件和凸台， 其中：
所述金属芯为变径结构， 从近端到远端分别为直线状结构、 阶梯状结构 和直线状结构；
所述螺旋丝为一个或多个， 固定在所述金属芯远端直线状结构和阶梯状 结构上；
所述输送元件为一个或多个， 固定在所述金属芯阶梯状结构上； 所述凸台固定在所述输送元件之后的所述金属芯阶梯状结构上。
2、 根据权利要求 1所述的医用导丝， 其特征在于， 进一步包括： 束縛元 件， 设置在所述金属芯上， 用于束缚所述植入器械的头端。
3、根据权利要求 1所迷的医用导丝， 其特征在于， 进一步包括： 保护套, 设置在所述凸台之后的所述金属芯阶梯状结构上。
4、 根据权利要求 1所述的医用导丝， 其特征在于， 所述阶梯状结构的直 径从近端到远端逐渐减 'J、。
5、 根据权利要求 4所述的医用导丝 , 其特征在于， 所述阶梯状结构由一 个或多个直径逐渐减小的圓柱体組成。
6、 根据权利要求 5所述的医用导丝， 其特征在于， 所述金属芯中节部分 由 3个直径逐渐减小的圓柱体組成。
7、 根据权利要求 1所述的医用导丝， 其特征在于， 所述螺旋丝的材料为 显影材料。
8、 根据权利要求 7所述的医用导丝， 其特征在于， 所述输送元件的结构 为螺旋结构。
9、 根据权利要求 8所述的医用导丝， 其特征在于， 所述输送元件为高分 子材料条状膜、 金属丝或中空的高分子材料管。
10、 根据权利要求 9所述的医用导丝， 其特征在于， 所述高分子材料为 热塑性弹性体材料。
11、 根据权利要求 10所述的医用导丝， 其特征在于， 所述热塑性弹性体 材料为聚氨酯、 聚乙烯或橡胶。
12、 根据权利要求 11所述的医用导丝， 其特征在于， 所述输送元件通过 热收缩、 焊接或胶粘结的放置固定在所述金属芯上。
13、 根据权利要求 1 所述的医用导丝， 其特征在于， 所述凸台的结构为 具有一定厚度的环状结构。
14、 根据权利要求 13所述的医用导丝， 其特征在于， 所述凸台的材料为 显影材料。
15、 根据权利要求 1 所述的医用导丝， 其特征在于， 所述束缚元件为弹 簧。
16、 根据权利要求 15所述的医用导丝， 其特征在于， 所述束缚元件通过 螺帽或焊接固定在所述金属芯上。
17、 根据权利要求 1所述的医用导丝， 其特征在于， 所述保护套为弹簧。
18、 根据权利要求 Π所述的医用导丝， 其特征在于 , 所述保护套通过焊 接或粘结的方式固定在所述金属芯上。
19、 根据权利要求 7或 14所述的医用导丝， 其特征在于， 所述显影材料 为黄金、 铱、 钨、 铂金或钽。
PCT/CN2011/070562 2010-02-05 2011-01-25 一种医用导丝 Ceased WO2011095089A1 (zh)

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