WO2013135182A1 - 一种球囊扩张导管 - Google Patents

一种球囊扩张导管 Download PDF

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Publication number
WO2013135182A1
WO2013135182A1 PCT/CN2013/072596 CN2013072596W WO2013135182A1 WO 2013135182 A1 WO2013135182 A1 WO 2013135182A1 CN 2013072596 W CN2013072596 W CN 2013072596W WO 2013135182 A1 WO2013135182 A1 WO 2013135182A1
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WO
WIPO (PCT)
Prior art keywords
inner tube
balloon
layer
dilatation catheter
spiral
Prior art date
Application number
PCT/CN2013/072596
Other languages
English (en)
French (fr)
Inventor
张滢涛
卢惠娜
谢志永
孙芳华
卢新坤
宋林飞
常孟琪
桂流峰
Original Assignee
上海微创医疗器械(集团)有限公司
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 上海微创医疗器械(集团)有限公司 filed Critical 上海微创医疗器械(集团)有限公司
Publication of WO2013135182A1 publication Critical patent/WO2013135182A1/zh

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M25/00Catheters; Hollow probes
    • A61M25/10Balloon catheters
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M25/00Catheters; Hollow probes
    • A61M25/0043Catheters; Hollow probes characterised by structural features
    • A61M25/005Catheters; Hollow probes characterised by structural features with embedded materials for reinforcement, e.g. wires, coils, braids
    • A61M25/0053Catheters; Hollow probes characterised by structural features with embedded materials for reinforcement, e.g. wires, coils, braids having a variable stiffness along the longitudinal axis, e.g. by varying the pitch of the coil or braid
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M25/00Catheters; Hollow probes
    • A61M2025/0098Catheters; Hollow probes having a strain relief at the proximal end, e.g. sleeve
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M25/00Catheters; Hollow probes
    • A61M25/10Balloon catheters
    • A61M2025/1043Balloon catheters with special features or adapted for special applications
    • A61M2025/1079Balloon catheters with special features or adapted for special applications having radio-opaque markers in the region of the balloon

Definitions

  • the utility model relates to the field of medical instruments, in particular to a balloon dilatation catheter. Background technique
  • balloon dilatation catheter therapy is reproducible and, when vascular restenosis occurs, can be re-expanded by minimally invasive methods.
  • interventional surgery has become the preferred method for treating arterial stenosis with its advantages of minimally invasive, reproducible operation and good efficacy.
  • the blood vessels in the subcutaneous lesion area are prone to diffuse calcification and even long-term occlusion.
  • the Applicant has found that the existing balloon dilatation catheter has poor push performance during the interventional treatment of the inferior knee artery, which is not conducive to the passage of diffuse calcification under the knee, or even long-term occlusion of the blood vessel. Arterial interventional surgery.
  • Chinese patent document CN201279337Y discloses a balloon dilatation catheter comprising a proximal tube segment, a distal tube segment and an expandable balloon, which are connected in series, the end of the proximal tube segment An end is disposed in the distal tube segment, and the portion of the proximal tube segment located in the distal tube segment further includes a slope portion at the end and a spiral portion adjacent to the slope portion; the slope portion is gradually tapered toward the end portion thereof
  • the spiral portion is provided with a spiral through groove penetrating the wall of the tube, and the pitch of the spiral passage groove decreases in a direction close to the slope portion.
  • a balloon dilatation catheter comprising a push rod, a balloon, an inner tube, a development mark, a stress diffusion tube and a connecting device, wherein: the push rod is a hollow structure, The distal end of the push rod is fixed to the proximal end of the balloon, and the proximal end of the push rod is fixed to the connecting device;
  • the connecting device has a first interface and a second interface, the first interface is connected to a proximal end of the inner tube, the second interface is opposite to an inner surface of the balloon and an outer surface of the inner tube The space between the space and the inner surface of the push rod and the outer surface of the inner tube are in communication;
  • the inner tube penetrates into the inner cavity of the balloon and the push rod, and the distal end of the inner tube passes out of the balloon and is fixed with the balloon;
  • the stress diffuser tube is disposed on a proximal end of the push rod.
  • the development mark is disposed on the inner tube opposite to the balloon position, and is characterized by:
  • the inner tube is a double-layer hollow structure and is composed of an inner tube inner layer and an inner tube outer layer on the inner tube inner layer, the inner tube inner layer including a slope portion at a distal end portion of the inner tube inner layer and a spiral portion adjacent to the slope portion, a distal end of the slope portion a distal end of the balloon is connected, and the spiral portion is provided with a spiral through groove extending through a wall of the inner tube of the inner tube in an axial direction of the inner tube, and a pitch of the spiral passage groove In the axial direction, it is incremented towards the connecting device.
  • the outer tube outer layer is tightly coated on the slope portion and the spiral portion of the inner tube inner layer.
  • the ramp portion tapers toward its end.
  • the length of the spiral portion ranges from 500 mm to 1400 mm.
  • the slope portion has a length ranging from 10 mm to 50 mm.
  • the pitch of the spiral portion ranges from 0.2 mm to 5 mm.
  • the spiral through groove has a width ranging from 0.01 mm to 0.06 mm.
  • the length from the proximal end of the helical portion to the proximal end of the inner layer of the inner tube is from 100 mm to 500 mm.
  • the outer layer of the inner tube is made of a composite material of nylon or nylon.
  • the inner tube inner layer is made of a medical grade metal material.
  • the balloon expansion catheter according to the present invention adopts a coaxial structure (OTW structure), the inner tube adopts a double-layer hollow structure, and the inner tube inner layer is provided with a spiral portion having a spiral through groove penetrating the tube wall, and the inner tube inner layer can be Formed from a metal tube, the ramp portion of the inner layer of the metal inner tube is coupled to the distal end portion of the balloon catheter, and the pitch of the helical portion can be adjusted as desired. Therefore, the balloon dilatation catheter of the present invention can avoid obvious hardness fluctuation in the direction in which the catheter extends, thereby preventing the catheter from being used during use.
  • the balloon dilatation catheter of the present invention has good pushability and mechanical transferability, and can smoothly pass through distortion, diffuse calcification, and even long occlusion in vascular disease interventional surgery. Blood vessels.
  • the balloon dilatation catheter of the present invention is compatible with the guide wires of 0.014, 0.018 and 0.035, and the whole process is smooth and has no blockage.
  • FIG. 1 is a schematic structural view of a balloon dilatation catheter according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of a cross section of an inner tube provided according to an embodiment of the present invention.
  • FIG. 3 is a schematic view showing the structure of an inner layer of an inner tube metal according to an embodiment of the present invention. detailed description
  • FIG. 1 is a schematic structural view of a balloon dilatation catheter according to an embodiment of the present invention.
  • the delivery device of the present invention is a coaxial balloon dilatation catheter comprising a balloon 1, a development mark 2, an inner tube 3, a push rod 4, a stress diffusion tube 5, a connecting device 6, and a guide wire.
  • the push rod 4 is a hollow structure, the distal end of the push rod 4 is sealed and fixed to the balloon 1, and the proximal end of the push rod 4 is sealed and fixed with the connecting device 6;
  • the inner tube 3 is a double-layer hollow structure, which runs through the ball The inner cavity of the capsule 1 and the push rod 4 is separated from the inner wall of the push rod 4, the distal end of the inner tube 3 passes through the balloon 1 and is fixedly sealed with the balloon 1, and the proximal end of the inner tube 3 and the connecting device 6 is sealed and fixed;
  • the inner tube 3 is a double-layer structure, and SP is composed of an inner tube inner layer and an inner tube outer layer on the inner tube inner layer, wherein the outer tube outer layer is tightly coated on the inner tube inner layer, This prevents the occurrence of liquid leakage.
  • the stress diffuser tube 5 is wrapped around the proximal end of the push rod 4, and its function is to increase the strength of the push rod 4 to prevent the push rod 4 from being broken.
  • At least two development marks 2 may be provided, wherein the development marks 2 may be evenly distributed on the inner tube 3 opposite to the position of the balloon 1.
  • the function of the development mark 2 is to display the position of the balloon 1 in the human body during surgery to achieve accurate positioning of the balloon 1.
  • the connecting device 6 is of the Y-shape, the connecting device 6 has a first interface 8 and a second interface 9, the first interface 8 and the second interface 9 being, for example, a Luer interface, wherein the The first interface 8 is connected to the proximal end of the inner tube 3, and the second interface 9 communicates with the space between the inner surface of the balloon and the outer surface of the inner tube, between the inner surface of the push rod and the outer surface of the inner tube.
  • the inner tube 3 is used as a guide wire lumen during surgery, and the guide wire 7 is penetrated by the distal end of the inner tube 3, and is The first interface 8 is threaded out so that the delivery device can move back and forth along the guide wire 7.
  • the space between the inner tube 3 and the push rod 4 serves as an injection chamber, and during the operation, the developing solution can be injected into the injection chamber through the second interface 9, so that the balloon 1 can be expanded under pressure to Working diameter.
  • the proximal end of the balloon 1 is fixed to the distal end of the push rod 4 by thermal splicing or laser splicing, and a seal is formed at the splicing portion.
  • the distal end of the balloon 1 is fixed to the distal end of the inner tube by thermal splicing or laser splicing, and a seal is formed at the splicing portion.
  • the material of the balloon 1 may be a medical polymer material well known to those skilled in the art, such as nylon, or a nylon composite material.
  • FIG. 2 is a schematic structural view of a cross section of an inner tube according to an embodiment of the present invention.
  • the inner tube is a double-layer hollow structure and is composed of an inner tube inner layer 3-2 and an inner tube outer layer 3-1 located on the inner tube inner layer 3-2.
  • the inner tube outer layer 3-1 has appropriate flexibility, and the inner tube outer layer 3-1 can be made of a polymer material having good biocompatibility, such as nylon or nylon composite material, in order to reduce the friction of the inner tube.
  • the outer layer of the inner tube may be made of nylon 12.
  • the inner tube inner layer 3-2 is suitably rigid so that the pushing force acting on the proximal end of the inner tube is transmitted as far as possible to the distal end of the inner tube, i.e., the end to which the balloon 1 is attached.
  • the inner tube inner layer 3-2 can be made of a medical grade metal material.
  • the material of the inner layer of the inner tube may be 304 stainless steel. Please refer to FIG. 3 further, FIG.
  • the inner tube inner layer 3-2 is an internal view according to an embodiment of the present invention. Schematic diagram of the inner layer of the tube metal.
  • the inner tube inner layer 3-2 further includes a ramp portion 3-21 at a distal end portion of the inner tube inner layer 3-2 and a spiral portion 3-22 adjacent to the ramp portion 3-21.
  • the inner tube inner layer 3-2 may also include a portion of the spiral-free through groove on the proximal side of the spiral portion 3-22.
  • the slope portion 3-21 is tapered toward its end (ie, the distal end of the inner tube inner layer), and the length L1 of the slope portion 3-21 may be between 10 mm and 50 mm, which length L1 can be reasonable according to the length of the entire system. Assigned to improve its support.
  • the end of the ramp portion 3-21 is flush with and connected to the end of the balloon dilation catheter (i.e., the Tip point of the balloon).
  • the spiral portion 3-22 is provided with a continuous spiral through groove 3-221 penetrating the wall of the inner tube inner layer 3-2, and the pitch of the spiral through groove 3-221 is adjacent to the inner tube in the axial direction of the inner tube
  • the end is incremented, that is, it is incremented from left to right in FIG.
  • the width and pitch of the appropriate spiral portion through groove should be reasonably selected.
  • the width of the spiral passage groove 3-221 ranges from 0.01 mm to 0.06 mm, specifically, the spiral
  • the width of the through groove 3-221 may be selected to be 0.02 mm; the pitch of the spiral through groove 3-221 may range from 0.2 mm to 5 mm.
  • the width and pitch of the spiral through grooves 3-221 can be reasonably distributed according to the overall length of the entire system.
  • the inner tube inner layer 3-2 generally also includes a portion of the spiral-free through groove on the proximal side of the spiral portion 3-22, the axial length of which is shown as L3 in Fig.
  • the length L3 is generally from 100 mm to 500 mm.
  • the material used for the push rod 4, the balloon 1, and the inner tube outer layer 3-1 is a composite material of nylon or nylon; the inner tube inner layer 3-2 is made of high-performance metal. a material, such as high-performance stainless steel; the surface of the balloon 1 may be sprayed with a hydrophilic polymer coating, and the hydrophilic polymer coating may be polyvinylpyrrolidone (PVP); Between the stress diffusing tube 5 and the connecting device 6, the pushing rod 4 and the connecting device 6 may be fixed by glue.
  • the inner tube of the balloon dilatation catheter of the present invention is made of a metal material, and the inner layer of the inner tube has a spiral through groove extending through the inner tube wall of the inner tube, the pitch of the spiral portion is inward along the axial direction of the inner tube.
  • the proximal end of the tube is incremented, so the hardness of the catheter is gradually changed.
  • the whole system has moderate rigidity and flexibility, which makes the catheter have good pushability and mechanical transferability, so that it can smoothly distort the vascular disease interventional surgery. Diffuse calcification, even long-term occlusion of blood vessels, smoothly reach the vascular lesion site.
  • the balloon dilatation catheter of the present invention is compatible with the 0.014, 0.018, and 0.035 guide wires, and the entire procedure is smooth and has no blockage.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
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  • Engineering & Computer Science (AREA)
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Abstract

一种球囊扩张导管,包括推送杆(4)、球囊(1)、内管(3)、显影标记(2)、应力扩散管(5)和连接装置(6),其中内管(3)为双层中空结构,且由内管内层(3-2)和位于内管内层(3-2)上的内管外层(3-1)构成,内管内层(3-2)包括位于内管内层(3-2)的远端部分处的斜坡部分(3-21)及与斜坡部分(3-21)相邻的螺旋部分(3-22),斜坡部分(3-21)的远端与球囊(1)的远端相连接,螺旋部分(3-22)沿内管(3)轴向方向设有贯穿内管内层(3-2)的管壁的螺旋状通槽(3-221),螺旋状通槽(3-221)的螺距在轴向方向上朝连接装置(6)递增。该球囊扩张导管能避免在导管延伸方向上出现明显的硬度波动,进而可避免导管在使用过程中出现弯曲现象。

Description

一种球囊扩张导管 技术领域
本实用新型涉及医疗器械领域, 特别是涉及一种球囊扩张导管。 背景技术
近十几年来, 随着我国人口老龄化的加剧和糖尿病发病率的升高, 心脑血管及外周血管患病率也不断上升。 在血管疾病中, 动脉血管狭 窄会直接危及病人的生命安全。上世纪 70年代, 出现了球囊扩张技术, 它是在医学影像设备的引导下, 用经皮穿刺技术将球囊导管插入血管 的狭窄部位, 在严格监护下进行球囊扩张膨胀, 使血管的狭窄部位得 到扩张, 从而恢复管腔直径。 这种方法与传统外科手术相比, 只需局部麻醉, 开 l-2mm的小口 即可, 具有出血少、 创伤小、 并发症少、 术后恢复快和安全可靠等优 点, 可以大大减轻病人所承受的痛苦。 而且, 球囊扩张导管治疗具有 可重复性, 当出现血管再狭窄后, 还可以通过微创的方法再次扩张。 另外, 即使手术失败, 其对进一步的支架或血管搭桥手术并没有显著 的影响, 因此, 介入治疗手术以其微创、 可重复操作、 疗效佳等优点 逐渐成为首选的治疗动脉血管狭窄的手段。 下肢缺血的患者的膝下病变区的血管易出现弥漫钙化、 甚至长段 闭塞。 通过对现有技术的研究, 申请人发现, 在进行膝下动脉介入治 疗手术时, 现有的球囊扩张导管推送性能较差, 不利于穿越膝下弥漫 钙化、 甚至长段闭塞的血管, 无法完成膝下动脉介入治疗手术。 中文专利文献 CN201279337Y公开了一种球囊扩张导管, 其包括 依次连接的近端管段、 远端管段以及可扩张球囊, 所述近端管段的末 端设置于所述远端管段之中, 所述近端管段位于远端管段中的部分进 一步包括位于末端的斜坡部分以及与所述斜坡部分相邻的螺旋部分; 所述斜坡部分向其末端渐缩, 所述螺旋部分设有贯穿管壁的螺旋状通 槽, 所述螺旋状通槽的螺距沿着靠近所述斜坡部分的方向递减。 因此, 导线通道的出口附近的远端管段可以由所述斜坡部分支撑, 所述螺旋 部分的螺距逐渐减小, 导管的硬度逐渐变化, 由此可使推送力较为顺 畅地传递。 但是, 该专利文献采用的是快速交换结构 (RX结构) , 内 管仅为单层结构。 因而, 其推送性和力学传递性还不够好。 实用新型内容
鉴于现有技术的上述技术问题, 本实用新型的目的在于开发一种 球囊扩张导管, 其能够避免在导管延伸方向上出现明显的硬度波动, 进而可避免导管在使用过程中出现弯曲现象。 根据本实用新型, 提供了一种球囊扩张导管, 该球囊扩张导管包 括推送杆、 球囊、 内管、 显影标记、 应力扩散管和连接装置, 其中: 所述推送杆为中空结构, 所述推送杆的远端与所述球囊的近端相 固定, 所述推送杆的近端与所述连接装置相固定;
所述连接装置具有第一接口和第二接口, 所述第一接口与所述内 管的近端相连, 所述第二接口与所述球囊的内表面和所述内管的外表 面之间的空间及所述推送杆的内表面和所述内管的外表面之间的空间 相通;
所述内管贯穿于所述球囊与所述推送杆的内腔之中, 所述内管的 远端穿出所述球囊并与所述球囊固定;
所述应力扩散管设置在所述推送杆的近端上; 并且
所述显影标记设置在与所述球囊位置相对的所述内管上, 其特征在于:
所述内管为双层中空结构, 且由内管内层和位于该内管内层上的 内管外层构成, 所述内管内层包括位于该内管内层的远端部分处的斜 坡部分以及与所述斜坡部分相邻的螺旋部分, 所述斜坡部分的远端与 所述球囊的远端相连接, 并且, 所述螺旋部分沿所述内管的轴向方向 设有贯穿所述内管内层的管壁的螺旋状通槽, 所述螺旋状通槽的螺距 在所述轴向方向上朝向所述连接装置递增。 优选的是, 所述内管外层紧密包覆在所述内管内层的所述斜坡部 分和所述螺旋部分上。 优选的是, 所述斜坡部分向其末端逐渐缩小。 优选的是, 所述螺旋部分的长度范围为 500mm至 1400mm。 优选的是, 所述斜坡部分的长度范围为 10mm至 50mm。 优选的是, 所述螺旋部分的螺距的范围为 0.2mm至 5mm。 优选的是, 所述螺旋状通槽的宽度范围为 0.01mm至 0.06mm。 优选的是, 从所述螺旋部分的近端到所述内管内层的近端的长度 为 100mm至 500mm。 优选的是, 所述内管外层由尼龙或尼龙的复合材料制成。 优选的是, 所述内管内层由医用级金属材料制成。 根据本实用新型的球囊扩张导管采用同轴式结构 (OTW结构) , 内管采用双层中空结构, 内管内层中设有具有贯穿管壁的螺旋状通槽 的螺旋部分, 内管内层可以由金属管材形成, 金属内管内层的斜坡部 分与球囊导管的远端部分相连接, 且所述螺旋部分的螺距可以根据需 要而进行调整。 由此, 本实用新型的球囊扩张导管能够避免在其导管 延伸方向上出现明显的硬度波动, 进而可以避免导管在使用过程中出 现弯曲现象, 以实现在膝下动脉介入治疗手术中, 可以顺利穿越膝下 弥漫钙化、 甚至长段闭塞的血管。 通过采用双层内管设计及梯度螺旋结构, 本实用新型的球囊扩张 导管具有良好的推送性和力学传递性, 可以在血管疾病介入治疗手术 中顺利地穿越迂曲、 弥漫钙化、 甚至长段闭塞的血管。 而且, 本实用 新型的球囊扩张导管兼容 0.014、 0.018和 0.035导丝, 整个过程顺畅, 无 阻滞感。 附图说明
为了更清楚地说明本实用新型实施例的技术方案, 下面将对实施 例描述中所需要使用的附图作简单地介绍。 显而易见的是, 下面描述 中的附图仅仅是本申请中记载的特定实施例, 其不是对本实用新型的 保护范围的限制。 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, 当然还可以根据本实用新型的如下实施例及其附图获得 一些其它的实施例和附图。 图 1为根据本实用新型的一个实施例提供的一种球囊扩张导管的 结构示意图;
图 2为根据本实用新型的一个实施例提供的内管截面的结构示意 图; 并且
图 3为根据本实用新型的一个实施例提供的内管金属内层的结构 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 将结合本实用新型实施例中的附图, 对本实用新型实施例中的技术方 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。 基于本申请所述的具体实施例, 本 领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其它 实施例, 都应当落在本实用新型的构思的范围之内。 以下参考附图来详细描述本实用新型的优选实施例。 总体上, 本实用新型提供一种球囊扩张导管, 其能够避免在其导 管延伸方向上出现明显的硬度波动, 进而可以避免导管在使用过程中 出现弯曲现象, 以实现在膝下动脉介入治疗手术中, 可以顺利穿越膝 下弥漫钙化、 甚至长段闭塞的血管。 请参考图 1, 图 1为根据本实用新型的一个实施例提供的一种球囊 扩张导管的结构示意图。 如图 1所示, 本实用新型的输送装置为同轴式球囊扩张导管, 其包 括球囊 1、 显影标记 2、 内管 3、 推送杆 4、 应力扩散管 5、 连接装置 6和 导丝 7, 其中: 推送杆 4为中空结构, 推送杆 4的远端与球囊 1密封固定, 推送杆 4的近端与连接装置 6密封固定; 内管 3为双层中空结构, 其贯穿 于球囊 1与推送杆 4的内腔之中, 且与推送杆 4的内壁相隔离, 内管 3的 远端穿过球囊 1并与球囊 1密封固定, 内管 3的近端与连接装置 6密封固 定; 内管 3为双层结构, SP , 由内管内层和位于该内管内层上的内管外 层构成, 其中所述内管外层紧密包覆在所述内管内层上, 由此可防止 漏液现象的发生。 应力扩散管 5包覆在推送杆 4的近端, 其作用是提高 推送杆 4的强度, 以避免推送杆 4被折断。可以设置至少两个显影标记 2, 其中可以将显影标记 2均匀分布在与球囊 1位置相对的内管 3上。 显影标 记 2的作用是在手术时显示球囊 1在人体内的位置, 以实现对球囊 1进行 准确定位。 所述连接装置 6为 Y型, 所述连接装置 6具有第一接口 8和第 二接口 9, 所述第一接口 8和所述第二接口 9例如为鲁尔 (Luer) 接口, 其中所述第一接口 8与内管 3的近端相连, 而所述第二接口 9与球囊内表 面和内管外表面之间、 推送杆内表面和内管外表面之间的空间相通。 内管 3在手术时用作导丝腔, 导丝 7由内管 3的远端穿入, 并由所述 第一接口 8穿出, 使得该输送装置可以沿着导丝 7前后运动。 内管 3和推 送杆 4之间的空间用作注入腔, 在手术时, 可以通过所述第二接口 9将 显影溶液注入该注入腔中, 从而可以在压力的作用下使得球囊 1扩张到 工作直径。 球囊 1的近端通过热悍接或激光悍接的方式固定在推送杆 4的远 端, 并且在悍接部位形成密封。 球囊 1的远端通过热悍接或激光悍接的 方式固定在内管的远端, 并且在悍接部位形成密封。 在本申请的实施 例中, 球囊 1的材料可以为本领域普通技术人员所熟知的医用高分子材 料, 例如尼龙、 或尼龙复合材料等。 采用这些材料可以使得球囊 1在很 低的工作压力下就能够达到扩张直径, 在手术时, 球囊 1的工作压力一 般在 6-10标准大气压 (atm) 。 请进一步参考图 2, 图 2为根据本实用新型的一个实施例提供的内 管截面的结构示意图。 所述内管为双层中空结构,且由内管内层 3-2和位于该内管内层 3-2 上的内管外层 3-1构成。 内管外层 3-1具有适当的柔性,内管外层 3-1可选用具有良好生物相 容性的高分子材料、 如尼龙或尼龙类复合材料制成, 以便减小内管的 摩擦力, 提高球囊扩张导管的跟踪性, 使其能够沿着血管顺利延伸, 并可防止造影夜渗过内管的带有螺旋结构的金属内层而进入导丝腔、 即内管内腔。 具体地, 内管外层的材料可以选用尼龙 12。 内管内层 3-2具有适当的刚性, 以使作用于内管近端的推送力尽可 能传递至内管远端、 即连接球囊 1的一端。 内管内层 3-2可选用医用级金 属材料制成。 具体地, 内管内层的材料可以选用 304不锈钢。 请进一步参考图 3, 图 3为根据本实用新型的一个实施例提供的内 管金属内层的结构示意图。 所述内管内层 3-2进一步包括位于内管内层 3-2的远端部分处的斜 坡部分 3-21以及与斜坡部分 3-21相邻的螺旋部分 3-22。 此外, 所述内管 内层 3-2—般还可包括在所述螺旋部分 3-22的近侧的无螺旋通槽的部 分。 所述斜坡部分 3-21向其末端 (即内管内层的远端) 渐缩, 斜坡部 分 3-21的长度 L1可在 10mm至 50mm之间, 该长度 L1可以根据整个系统 的长度进行合理的分配, 以便提高其支撑效果。该斜坡部分 3-21的末端 与球囊扩张导管的末端 (即所述球囊的 Tip点) 相平齐并与其连接。 所述螺旋部分 3-22设有贯穿内管内层 3-2的管壁的连续螺旋状通槽 3-221, 该螺旋状通槽 3-221的螺距沿着内管轴向方向朝向内管近端递 增, 即沿着图 3中自左向右的方向递增。 为了保证内管金属内层的刚性 和柔性达到使用要求, 应合理选择适当的螺旋部分通槽的宽度和螺距, 螺旋状通槽 3-221的宽度范围为 0.01mm至 0.06mm, 具体地, 螺旋状通槽 3-221的宽度可选择为 0.02mm;螺旋状通槽 3-221的螺距范围为 0.2mm至 5mm。 具体地, 螺旋状通槽 3-221的宽度和螺距可以根据整个系统的整 体长度进行合理的分配。 此外, 所述内管内层 3-2—般还包括在所述螺旋部分 3-22的近侧的 无螺旋通槽的部分, 该部分的轴向长度在图 3中示出为 L3 , 它就是从所 述螺旋部分 3-22的近端到所述内管内层 3-2的近端的长度, 该长度 L3— 般为 100mm至 500mm。 此外, 优选地, 所述推送杆 4、 球囊 1、 内管外层 3-1所采用的材料 均是尼龙或尼龙的复合材料; 所述内管内层 3-2采用的材料是高性能金 属材料, 例如是高性能不锈钢; 所述球囊 1的表面可以喷涂亲水高分子 涂层, 所述亲水高分子涂层可以为聚乙烯吡咯垸酮 (PVP) ; 并且, 所 述应力扩散管 5与连接装置 6之间、 所述推送杆 4与所述连接装置 6之间 可以采用胶水固定。 由于本实用新型的球囊扩张导管的内管内层采用金属材料, 且内 管内层带有贯穿整个内管内层管壁的螺旋状通槽, 螺旋部分的螺距沿 着内管的轴向方向向内管近端递增, 所以, 导管的硬度呈渐变形式, 整个系统具有适度的刚性和柔性, 使导管具有良好的推送性和力学传 递性, 由此可以在血管疾病介入治疗手术中顺利地穿越迂曲、 弥漫钙 化、 甚至长段闭塞的血管, 顺利到达血管病变部位。 而且, 本发明的 球囊扩张导管兼容 0.014、 0.018和 0.035导丝, 整个手术过程顺畅, 无阻 滞感。 以上所述仅是本申请的优选实施方式, 本领域技术人员能够基于 上述内容理解或实现本实用新型。 对本领域的技术人员来说, 对上述 实施例的多种修改将是显而易见的, 本文中所定义的一般原理可以在 不脱离本申请的精神或范围的情况下, 在其它实施例中实现。 因此, 本申请将不会被限制于本文所述的这些具体实施例, 而是可以覆盖与 本文所公开的原理和新颖特点相一致的最宽的范围。

Claims

权 利 要 求 书
1. 一种球囊扩张导管, 该球囊扩张导管包括推送杆 (4) 、 球囊 (1) 、 内管(3) 、 显影标记(2) 、 应力扩散管(5)和连接装置(6) , 其中:
所述推送杆 (4) 为中空结构, 所述推送杆 (4) 的远端与所述球 囊 (1) 的近端相固定, 所述推送杆 (4) 的近端与所述连接装置 (6) 相固定;
所述连接装置 (6) 具有第一接口 (8) 和第二接口 (9) , 所述第 一接口 (8) 与所述内管 (3) 的近端相连, 所述第二接口 (9) 与所述 球囊 (1) 的内表面和所述内管 (3) 的外表面之间的空间及所述推送 杆 (4) 的内表面和所述内管 (3) 的外表面之间的空间相通;
所述内管 (3) 贯穿于所述球囊 (1) 与所述推送杆 (4) 的内腔之 中, 所述内管 (3) 的远端穿出所述球囊 (1) 并与所述球囊 (1) 固定; 所述应力扩散管 (5) 设置在所述推送杆 (4) 的近端上; 并且 所述显影标记 (2) 设置在与所述球囊 (1) 位置相对的所述内管 (3) 上,
其特征在于:
所述内管 (3) 为双层中空结构, 且由内管内层 (3-2) 和位于该 内管内层 (3-2) 上的内管外层 (3-1) 构成, 所述内管内层 (3-2) 包 括位于该内管内层 (3-2) 的远端部分处的斜坡部分 (3-21) 以及与所 述斜坡部分 (3-21) 相邻的螺旋部分 (3-22) , 所述斜坡部分 (3-21) 的远端与所述球囊 (1) 的远端相连接, 并且所述螺旋部分 (3-22) 沿 所述内管 (3) 的轴向方向设有贯穿所述内管内层 (3-2) 的管壁的螺旋 状通槽 (3-221) , 所述螺旋状通槽 (3-221) 的螺距在所述轴向方向上 朝向所述连接装置 (6) 递增。
2. 根据权利要求 1所述的球囊扩张导管, 其特征在于, 所述内管 外层 (3-1) 紧密包覆在所述内管内层 (3-2) 的所述斜坡部分 (3-21) 和所述螺旋部分 (3-22) 上。
3. 根据权利要求 1所述的球囊扩张导管, 其特征在于, 所述斜坡 部分 ( 3-21 ) 向其末端逐渐缩小。
4. 根据权利要求 1至 3中的任一项所述的球囊扩张导管, 其特征 在于, 所述螺旋部分 (3-22) 的长度范围为 500mm至 1400mm。
5. 根据权利要求 1至 3中的任一项所述的球囊扩张导管, 其特征 在于, 所述斜坡部分 (3-21 ) 的长度范围为 10mm至 50mm。
6. 根据权利要求 1至 3中的任一项所述的球囊扩张导管, 其特征 在于, 所述螺旋部分 (3-22) 的螺距的范围为 0.2mm至 5mm。
7. 根据权利要求 1至 3中的任一项所述的球囊扩张导管, 其特征 在于, 所述螺旋状通槽 (3-221 ) 的宽度范围为 0.01mm至 0.06mm。
8. 根据权利要求 1至 3中的任一项所述的球囊扩张导管, 其特征 在于, 从所述螺旋部分 (3-22 ) 的近端到所述内管内层 (3-2 ) 的近端 的长度为 100mm至 500mm。
9. 根据权利要求 1至 3中的任一项所述的球囊扩张导管, 其特征 在于, 所述内管外层 (3-1 ) 由尼龙或尼龙的复合材料制成。
10. 根据权利要求 1 至 3 中的任一项所述的球囊扩张导管, 其特 征在于, 所述内管内层 (3-2) 由医用级金属材料制成。
PCT/CN2013/072596 2012-03-14 2013-03-14 一种球囊扩张导管 WO2013135182A1 (zh)

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