WO2018099147A1 - 滤器 - Google Patents

滤器 Download PDF

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Publication number
WO2018099147A1
WO2018099147A1 PCT/CN2017/099025 CN2017099025W WO2018099147A1 WO 2018099147 A1 WO2018099147 A1 WO 2018099147A1 CN 2017099025 W CN2017099025 W CN 2017099025W WO 2018099147 A1 WO2018099147 A1 WO 2018099147A1
Authority
WO
WIPO (PCT)
Prior art keywords
connecting rod
filter
telecentric
rod
groove
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/CN2017/099025
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English (en)
French (fr)
Inventor
罗洪兵
陈卓
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.)
Lifetech Scientific Shenzhen Co Ltd
Original Assignee
Lifetech Scientific Shenzhen 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 Lifetech Scientific Shenzhen Co Ltd filed Critical Lifetech Scientific Shenzhen Co Ltd
Publication of WO2018099147A1 publication Critical patent/WO2018099147A1/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
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • 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
    • A61F2/01—Filters implantable into blood vessels
    • A61F2/0108—Both ends closed, i.e. legs gathered at both ends

Definitions

  • the invention relates to a cardiovascular medical device, in particular to a vena cava filter.
  • Pulmonary embolism has a high mortality rate, and its etiology is derived from various emboli of the systemic circulation such as thrombus detachment.
  • Vena cava filters (hereinafter referred to as filters) have been clinically proven to be a safe and effective means of preventing pulmonary embolism, which can reduce the incidence of pulmonary embolism.
  • filters After the filter is implanted into the inferior vena cava for a certain period of time, it will be climbed and wrapped by endothelial cells to varying degrees, which makes it difficult to remove.
  • the filter is in contact with blood and vascular endothelium for a long time, protein adsorption and platelet adhesion may occur, and thrombus may eventually form. Blockage, or cause the lung embolism to reoccur; even cause the filter to deform, tilt, shift, break, and even penetrate the blood vessel.
  • the technical problem to be solved by the present invention is to provide a filter which can avoid being climbed by endothelial cells and being easily taken out in view of the defects of the prior art.
  • the technical solution adopted by the present invention to solve the technical problem is to construct a filter including a telecentric end filter, a proximal end filter, and a connection connecting the telecentric filter and the proximal end filter.
  • the connecting rod has at least a portion of the rigidity less than the rigidity of the remaining portion of the connecting rod, and the connecting rod is oriented when the supporting rod is subjected to pressure toward the radial direction of the filter
  • the interior of the filter is recessed.
  • the connecting rod has a portion having a radial cross-sectional area smaller than a radial cross-sectional area of other portions of the connecting rod.
  • the connecting rod is provided with a groove formed by the blank, and the groove has a smooth transition with the connecting rod.
  • the groove is located outside the connecting rod and/or inside the connecting rod.
  • the groove is a U-shaped groove, a V-shaped groove or an arc-shaped groove.
  • the post is provided with a linear cut.
  • the linear cut includes continuous or non-continuous cuts.
  • the radial cross-sectional area of the connecting rod gradually decreases along its axial direction.
  • the support bar includes a telecentric end support bar disposed adjacent the telecentric end and a proximal end support bar disposed adjacent the proximal end.
  • the telecentric end support rod and the proximal end support rod each include a guiding section extending from the connecting rod to the blood vessel wall and extending from the guiding section and engaging with the blood vessel The supporting section of the wall.
  • the telecentric end support bar further includes a fixed anchor extending from the junction of the guiding segment and the support segment toward the vessel wall.
  • the connecting rod of the filter of the present invention has a partial rigidity lower than that of other parts.
  • the connecting rod is recessed toward the inside of the filter, so that the connecting rod is away from the blood vessel wall, and the connecting rod is lowered.
  • the risk of epidermal cell climbing makes the filter easier to remove.
  • Figure 1 is a schematic view showing the structure of a preferred embodiment of the filter of the present invention.
  • FIG. 2a is a schematic structural view of a first embodiment of a connecting rod in the filter of the present invention
  • Figure 2b is an enlarged view of the portion labeled 151 in Figure 2a;
  • Figure 3a is a schematic structural view of a second embodiment of a connecting rod in the filter of the present invention.
  • Figure 3b is an enlarged view of the portion labeled 152 in Figure 3a;
  • Figure 4a is a schematic structural view of a third embodiment of a connecting rod in the filter of the present invention.
  • Figure 4b is an enlarged view of the portion labeled 153 in Figure 4a;
  • Figure 5a is a schematic structural view of a fourth embodiment of a connecting rod in the filter of the present invention.
  • Figure 5b is an enlarged view of the portion labeled 154 in Figure 5a;
  • Figure 6a is a schematic view showing the structure of a fifth embodiment of the connecting rod in the filter of the present invention.
  • Figure 6b is an enlarged view of the portion labeled 154 in Figure 6a;
  • Figure 7a is a schematic view showing the structure of a sixth embodiment of the connecting rod in the filter of the present invention.
  • Figure 7b is an enlarged view of the portion labeled 155 in Figure 7a;
  • Figure 8 is a schematic illustration of the deformation of the filter of the present invention in a blood vessel after implantation.
  • a filter 10 includes a telecentric end 11, a proximal end 12, and a filter body coupled between the telecentric end 11 and the proximal end 12.
  • the telecentric end 11 is provided with a coupling nut 19 and a recovery hook 18.
  • the recovery hook 18 is for use with a catching device that includes a plurality of hooks 181 that are evenly spaced along the circumferential direction of the telecentric end 11, each of the hooks 181 radiating radially toward the filter body.
  • Providing a plurality of hook bodies 181 in the circumferential direction of the telecentric end 11 facilitates the recovery and removal of the filter, even if the lumen wall obscures one of the hook bodies 181 due to the inclination of the filter, other hook bodies 181 are exposed to the lumen, thereby Increased the chance that the filter will be caught. It will be appreciated that a recovery hook can also be provided on the proximal end 12 so that the filter can be captured and recovered in both directions.
  • the filter body includes a telecentric filter 13, a proximal end filter 14, and a connecting rod 15 for connecting the telecentric filter 13 and the proximal filter 14.
  • the telecentric filter 13 and the proximal end filter 14 have a conical mesh structure as a whole.
  • the telecentric filter screen 13 includes a plurality of telecentric end filter rods 131 extending from one end of the connecting rod to the telecentric end 11 and the adjacent two telecentric end filter rods 131 in the near telecentric The position of the end 11 is brought together and connected to the telecentric end 11.
  • the proximal end filter screen 14 includes a plurality of Y-shaped proximal end filter rods 141, each of which includes a first mesh rod 142 and a bifurcation extension from the end of the first mesh rod 142.
  • a second net rod 143 is formed and connected to the connecting rod 15, and a plurality of first net rods 142 are collected at the proximal end 12.
  • the filter further includes a support rod connected to the connecting rod 15, the support rod is for abutting against the inner wall of the lumen so that the connecting rod 15 is away from the inner wall of the lumen without contacting the inner wall of the lumen, and the connecting rod 15 is lowered.
  • the risk of being climbed by vascular endothelial cells, and the support rods ensure that the entire filter is balanced in the axial and circumferential directions, ensuring that the entire filter does not tilt or shift under the influence of blood flow and external force.
  • the support rod includes a telecentric end support rod 16 disposed adjacent the telecentric end 11 and a proximal end support rod 17 disposed adjacent the proximal end 12.
  • the telecentric end support rod 16 includes a guiding portion 161 extending from the connecting rod 15 in a direction away from the telecentric end 11 , a supporting portion 162 bent from the guiding portion 161 , and a joint extending from the guiding portion 161 and the supporting portion 162 .
  • Fixed anchor 163 The structure of the proximal end support rod 17 is substantially the same as that of the telecentric end support rod 16, except that there is no fixed anchor. In other embodiments of the present invention, the structure of the proximal end support rod 17 may be the same as that of the telecentric end support rod 16.
  • the connecting rod 15 of the present invention has a partial stiffness that is less than the stiffness of the remaining portion.
  • the rigidity of the portion is lowered by forming the groove 151 by the center portion of the connecting rod 15.
  • the groove 151 is located outside the connecting rod 15, and it is noted that in the present invention, the inside facing the inside of the filter body is the inner side, and the opposite side is the outer side.
  • the groove 151 formed by the blanking causes the radial cross-sectional area of the connecting rod 15 at this point to be smaller than the radial cross-sectional area of the remaining portion of the connecting rod 15, reducing the rigidity of the portion, thereby increasing the deflection of the connecting rod 15.
  • the support rod when the filter 10 is completely released from the conveyor within the blood vessel, the support rod is subjected to radial pressure from the lumen wall 20, or when external force is applied to the support rod, the pressure will be Passed to the connecting rod 15, since the radial sectional area of the groove 151 is smaller than the radial sectional area of the remaining portion of the connecting rod 15, the intermediate portion of the connecting rod 15 is relatively soft, so that the intermediate portion of the connecting rod 15 faces the filter 10.
  • the interior is bent, creating a depression that further moves the connecting rod away from the lumen wall 20, which in turn reduces the risk of the connecting rod 15 being climbed, increasing the ease with which the filter can be removed.
  • the shape of the groove 151 is U-shaped, and a smooth transition is made between the groove 151 and the connecting rod 15, specifically, a chamfering transition is used. It can be understood that a rounded transition can also be adopted, thereby reducing the portion.
  • the stress causes the connecting rod 15 to be easily broken due to a sudden change in the radial cross-sectional area of the portion.
  • the structure of the filter in this embodiment is substantially the same as that of the previous embodiment, except that in the present embodiment, the groove 152 is provided inside the connecting rod 15. It can be seen that the groove 152 can be disposed either on the inner side of the connecting rod 15 or on the outer side of the connecting rod 15, and the effect is the same.
  • the support rod is subjected to radial pressure, the intermediate portion of the connecting rod 15 will still bend toward the inside of the filter, creating a depression that is further away from the lumen wall.
  • the structure of the filter in this embodiment is substantially the same as that of the previous two embodiments, except that in the present embodiment, the groove 153 is disposed on the inner side and the outer side of the connecting rod 15, at this time.
  • the connecting rod 15 has the smallest cross-sectional area at this portion, and the connecting rod 15 of this embodiment is more flexible and more susceptible to bending deformation than the above two embodiments.
  • the structure of the filter in this embodiment is substantially the same as that of the previous two embodiments, except that in this embodiment, the groove 154 is a V-shaped groove formed by the unloading of the connecting rod 15.
  • the V-shaped grooves 154 may be provided on the inner side, the outer side of the connecting rod 15, or at the same time on the inner side and the outer side of the connecting rod 15.
  • the structure of the filter in this embodiment is substantially the same as that of the previous two embodiments, except that in this embodiment, the connecting rod 15 is provided with a linear cut 155.
  • the cut 155 is formed by the material being cut at the surface of the connecting rod 15, so that the radial cross-sectional area of the cut portion is inevitably smaller than the radial cross-sectional area of the remaining portion of the connecting rod 15, which is low in rigidity with respect to the latter.
  • the cut 155 may be a continuous cut or a non-continuous cut, and a plurality of spaced apart cuts may be provided to further increase the deflection of the connecting rod 155.
  • the structure of the filter in this embodiment is basically the same as that of the previous two embodiments, except that in this embodiment, the radial cross-sectional area of the connecting rod 15 is directed to the distal end along the proximal end. slowing shrieking.
  • the radial cross-sectional area of the connecting rod 15 can also be tapered along the direction from the distal end to the proximal end, as long as it is axial, which does not affect the practice of this patent.
  • the progressively smaller radial cross-sectional area of the connecting rod 15 can maximize the strength of the connecting rod 15 while increasing the deflection of the connecting rod 15.
  • the groove of the present invention may have other shapes, such as a curved groove or the like, as long as there is a function of reducing the radial cross-sectional area of the connecting rod portion; further, not limited to the groove and the cut, as long as It is possible to achieve a reduction in the rigidity of a part of the connecting rod, and the intermediate portion of the connecting rod can be recessed toward the inside of the filter when the supporting rod is subjected to radial pressure, and the distal end portion and the proximal end portion are closer to the central axis of the filter.
  • This measure involves the use of a softer material in some part of the connecting rod and the use of other machining methods to increase the deflection of the connecting rod.
  • the connecting rod of the filter of the present invention has at least part of the rigidity less than the rigidity of the other parts, thereby increasing the deflection of the connecting rod.
  • the connecting rod is directed toward the inside of the filter. Bending, thereby keeping the connecting rod away from the vessel wall, reduces the risk of the connecting rod being climbed by the epidermal cells, making the filter easier to remove.

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  • Health & Medical Sciences (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

一种滤器（10），包括远心端滤网（13）、近心端滤网（14）、连接远心端滤网（13）和近心端滤网（14）的连接杆（15），和至少一根与连接杆（15）相连并位于连接杆（15）外侧的支撑杆。连接杆（15）有部分的径向截面积小于连接杆（15）其他部分的径向截面积。远心端滤网（13）包括多根远心端滤网杆（131），每根远心端滤网杆（131）的一端与连接杆（15）相连，所有远心端滤网杆（131）的另一端汇聚于远心端（11）。该滤器在连接杆（15）上设置的柔性段有部分的径向截面积小于连接杆其余部分的径向截面积，从而起到改变增大连接杆（15）局部挠度的效果，当滤器（10）受到来自管腔壁径向压力的情况下，柔性段连接杆发生朝向滤器内部的弯曲，从而使连接杆（15）远离血管壁，降低连接杆被表皮细胞爬覆的风险，使滤器更容易被取出。

Description

滤器
【技术领域】
本发明涉及一种心血管医疗器械，尤其涉及一种腔静脉滤器。
【背景技术】
肺栓塞病死率高，其病因来源于体循环的各种栓子例如血栓脱落。腔静脉滤器（以下简称滤器）在临床上被证实为预防肺栓塞安全有效的手段，可降低肺栓塞的发生率。滤器植入下腔静脉一定时间后，会不同程度地被内皮细胞爬覆、包裹，造成难于取出；滤器长期与血液和血管内皮接触，可能发生蛋白质吸附、血小板粘附，最终形成血栓导致静脉血管堵塞，或导致肺栓塞再次发生；甚至造成滤器变形、倾斜、移位、断裂，甚至穿透血管的危险。
因此，如何避免滤器在血管中被内皮细胞爬覆、包裹，使滤器容易被取出是一个亟待解决的问题。
【发明内容】
本发明要解决的技术问题在于，针对现有技术的缺陷，提供一种可避免被内皮细胞爬覆且容易取出的滤器。
本发明解决其技术问题所采用的技术方案是：构造一种滤器，其包括远心端滤网、近心端滤网、连接所述远心端滤网和所述近心端滤网的连接杆，和至少一根与所述连接杆相连并位于所述连接杆外侧的支撑杆，所述远心端滤网包括多根远心端滤网杆，所有所述远心端滤网杆的另一端汇聚于所述远心端；所述连接杆至少有部分的刚度小于所述连接杆其余部分的刚度，当所述支撑杆受朝向所述滤器径向的压力时，所述连接杆朝向所述滤器的内部凹陷。
依本发明的一实施例中，所述连接杆有部分的径向截面积小于所述连接杆其他部分的径向截面积。
依本发明的一实施例中，所述连接杆上设有去料形成的凹槽，所述凹槽与所述连接杆之间为平滑过渡。
依本发明的一实施例中，所述凹槽位于所述连接杆外侧和/或连接杆内侧。
依本发明的一实施例中，所述凹槽为U形凹槽、V形凹槽或弧形凹槽。
依本发明的一实施例中，所述接杆上设有线状割痕。
依本发明的一实施例中，所述线状割痕包括连续或非连续状的割痕。
依本发明的一实施例中，所述连接杆的径向截面积沿其轴向方向逐渐减小。
依本发明的一实施例中，所述支撑杆包括靠近所述远心端设置的远心端支撑杆和靠近所述近心端设置的近心端支撑杆。
依本发明的一实施例中，所述远心端支撑杆和所述近心端支撑杆均包括自所述连接杆向血管壁延伸的引导段以及自所述引导段弯折延伸并与血管壁抵触的支撑段。
依本发明的一实施例中，所述远心端支撑杆还包括自所述引导段与所述支撑段的连接处向血管壁延伸的固定锚。
本发明的滤器的连接杆有部分的刚度比其他部分低，当支撑杆受到来自径向压力的情况下，连接杆发生朝向滤器内部的凹陷，从而使连接杆远离血管壁，降低了连接杆被表皮细胞爬覆的风险，使滤器更容易被取出。
【附图说明】
下面将结合附图及实施例对本发明作进一步说明，附图中：
图1是本发明一种滤器优选实施例的结构示意图；
图2a是本发明的滤器中连接杆第一实施例的结构示意图；
图2b是图2a中标号为151的部位的放大图；
图3a是本发明的滤器中连接杆第二实施例的结构示意图；
图3b是图3a中标号为152的部位的放大图；
图4a是本发明的滤器中连接杆第三实施例的结构示意图；
图4b是图4a中标号为153的部位的放大图；
图5a是本发明的滤器中连接杆第四实施例的结构示意图；
图5b是图5a中标号为154的部位的放大图；
图6a是本发明的滤器中连接杆第五实施例的结构示意图；
图6b是图6a中标号为154的部位的放大图；
图7a是本发明的滤器中连接杆第六实施例的结构示意图；
图7b是图7a中标号为155的部位的放大图；
图8是本发明的滤器经植入后在血管内的形变示意图。
【具体实施方式】
为了对本发明的技术特征、目的和效果有更加清楚的理解，现对照附图详细说明本发明的具体实施方式。
第一实施例：
如图1所示，一种滤器10包括远心端11、近心端12以及连接于远心端11和近心端12之间的滤器主体。远心端11设有连接螺母19和回收钩18。回收钩18用于与抓捕装置配合使用，其包括多个沿远心端11的周向均匀间隔分布的钩体181，各钩体181朝向滤器主体的方向辐射延伸。在远心端11的周向设置多个钩体181有利于滤器的回收取出，即使由于滤器倾斜使得管腔壁遮挡住其中一个钩体181，仍然有其它钩体181暴露于管腔中，从而增加了滤器被抓捕的几率。可以理解的，也可以在近心端12上设置回收钩，从而使得滤器能够在两个方向被抓捕回收。
滤器主体包括远心端滤网13、近心端滤网14以及用于连接远心端滤网13和近心端滤网14的连接杆15。连接杆15有多个，多个连接杆15环绕远心端11和近心端12之间的连线周向间隔设置。远心端滤网13和近心端滤网14整体呈锥形网状结构。远心端滤网13包括多个远心端滤网杆131，远心端滤网杆131自连接杆一端向远心端11延伸，相邻两个远心端滤网杆131在近远心端11的位置汇集后与远心端11相连。近心端滤网14包括多个Y形近心端滤网杆141，任意一个Y形近心端滤网杆141均包括一根第一网杆142和自第一网杆142末端分叉延伸形成并与连接杆15相连的第二网杆143，多根第一网杆142汇集于近心端12。
如图2a所示，该滤器还进一步包括与连接杆15连接的支撑杆，支撑杆用于与管腔内壁抵触从而使连接杆15远离管腔内壁而不接触管腔内壁，降低了连接杆15被血管内皮细胞爬覆的风险，且支撑杆能够保证整个滤器在轴向和周向受力均衡，确保整个滤器不会在血流及外力的影响下倾斜或移位。支撑杆包括靠近远心端11设置的远心端支撑杆16和靠近近心端12设置的近心端支撑杆17。其中远心端支撑杆16包括自连接杆15向远离远心端11方向延伸的引导段161、自引导段161弯折延伸的支撑段162以及自引导段161和支撑段162的连接处延伸的固定锚163。近心端支撑杆17的结构与远心端支撑杆16的结构大体相同，只是没有固定锚。在本发明其他实施例中，近心端支撑杆17的结构可与远心端支撑杆16的结构相同。
本发明中的连接杆15有部分的刚度小于其余部分的刚度。如图2a和图2b所示，在本实施例中，通过在连接杆15的中间部分去料形成凹槽151来降低该部分的刚度。凹槽151位于连接杆15的外侧，值得注意的是，本发明中，面向滤器主体内部的为内侧，与之相反为外侧。去料形成的凹槽151使得连接杆15于该处的径向截面积小于连接杆15其余部分的径向截面积，降低了该部分的的刚度，从而增大了连接杆15的挠度。如图8所示，当滤器10在血管内从输送器完全释放后，支撑杆会受到来自于管腔壁20的径向压力，或者在体外，向支撑杆施加径向压力时，该压力会被传递给连接杆15，由于凹槽151的径向截面积小于连接杆15其余部分的径向截面积，连接杆15的中间部分相对较软，从而使连接杆15的中间部分朝向滤器10的内部发生弯曲，产生凹陷，使连接杆更加远离管腔壁20，继而降低了连接杆15被爬覆的风险，提高了滤器被取出的容易程度。
在该实施例中，凹槽151的形状呈U形，且与连接杆15之间为平滑过渡，具体为采用倒角过渡，可以理解的，也可以采用圆角过渡，从而减小了这部分的应力，使连接杆15不会因为该部分径向截面积的突然改变而容易被折断。
第二实施例：
如图3a和3b所示，本实施例中滤器的结构与上一实施例基本相同，不同的是，在本实施例中，凹槽152被设置在连接杆15的内侧。由此可见，凹槽152既可以被设置在连接杆15的内侧也可以被设置在连接杆15的外侧，其效果是一样的。当支撑杆受到径向压力时，连接杆15的中间部分仍然会向滤器内部发生弯曲，产生凹陷，从而更加远离管腔壁。
第三实施例：
如图4a和4b所示，本实施例中滤器的结构与上两个实施例基本相同，不同的是，在本实施例中，凹槽153被设置在连接杆15的内侧和外侧，此时，连接杆15在这部分的截面积最小，且与上两个实施例相比，该实施例的连接杆15挠度更大，更容易发生弯曲变形。
第四实施例：
如图5a和5b所示，本实施例中滤器的结构与上两个实施例基本相同，不同的是，该实施例中，凹槽154为连接杆15上去料形成的V形凹槽。且与上几个实施例相同的是，V形凹槽154可以设置在连接杆15的内侧、外侧或同时设置在连接杆15的内侧和外侧。
第五实施例：
如图6a和6b所示，本实施例中滤器的结构与上两个实施例基本相同，不同的是，该实施例中，连接杆15上设有线状的割痕155。割痕155由在连接杆15的表面去料形成，因此有割痕的部分的径向截面积必然小于连接杆15其余部分的径向截面积，前者相对后者刚度低。与上几个实施例相比，只是这种去料的程度较小，对连接杆15的径向截面积改变不太大，但是即便是如此，当支撑杆处于完全释放状态且受到径向压力时，割痕155的存在会在一定程度上增大连接杆15的挠度，引导连接杆15的中间部分向滤器内部弯曲，从而远离管腔内壁。割痕155的好处是在最大限度地不影响连接杆15本身强度的前提下，达到增加连接杆15挠度的目的。
割痕155可以是连续状的割痕，也可以是非连续状的割痕，且在此基础上还可以设置多条间隔设置的割痕，进一步增加连接杆155的挠度。
第六实施例：
如图7a和图7b所示，本实施例中滤器的结构与上两个实施例基本相同，不同的是，该实施例中，连接杆15的径向截面积沿近端指向远端的方向逐渐减小。在其它实施例中，连接杆15的径向截面积也可沿着由远端指向近端的方向逐渐减小，只要是轴向方向即可，这并不影响本专利的实施。
连接杆15径向截面积的逐步变小可以在增大连接杆15挠度的同时，最大限度地保留连接杆15的强度。
以上，只是本发明给出的几个具体实施例，这几个具体实施例不应当局限本发明的实施。例如，本发明的凹槽还可以是其他形状，例如弧形凹槽等等，只要有减小连接杆部分径向截面积的作用即可；更进一步地，不限于凹槽和割痕，只要能达成降低连接杆其中一部分的刚度，在支撑杆受到径向压力时连接杆的中间部分能朝向滤器内部凹陷，相对远端部分和近端部分更靠近滤器中心轴即可。这种措施包括在连接杆的某部分采用更加柔软的材料，用其他机加工的方法增加连接杆的挠度等。
本发明的滤器的连接杆至少有部分的刚度小于其他部分的刚度，从而起到增大连接杆挠度的效果，当滤器受到来自管腔壁径向压力的情况下，连接杆发生朝向滤器内部的弯曲，从而使连接杆远离血管壁，降低了连接杆被表皮细胞爬覆的风险，使滤器更容易被取出。

Claims (11)

  1. 一种滤器，包括远心端滤网、近心端滤网、连接所述远心端滤网和所述近心端滤网的连接杆，和至少一根与所述连接杆相连并位于所述连接杆外侧的支撑杆，所述远心端滤网包括多根远心端滤网杆，所有所述远心端滤网杆的另一端汇聚于远心端；特征在于，所述连接杆至少有部分的刚度小于所述连接杆其余部分的刚度，当所述支撑杆受朝向所述滤器径向的压力时，所述连接杆的朝向所述滤器的内部凹陷。
  2. 根据权利要求1所述的滤器，其特征在于，所述连接杆有部分的径向截面积小于连接杆其它部分的径向截面积。
  3. 根据权利要求2所述的滤器，其特征在于，所述连接杆设有去料形成的凹槽，所述凹槽与所述连接杆之间为平滑过渡。
  4. 根据权利要求3所述的滤器，其特征在于，所述凹槽位于所述连接杆外侧和/或连接杆内侧。
  5. 根据权利要求3所述的滤器，其特征在于，所述凹槽为U形凹槽、V形凹槽或弧形凹槽。
  6. 根据权利要求1所述的滤器，其特征在于，所述接杆设有线状割痕。
  7. 根据权利要求6所述的滤器，其特征在于，所述线状割痕包括连续或非连续状的割痕。
  8. 根据权利要求1所述的滤器，其特征在于，所述连接杆的径向截面积沿其轴向方向逐渐减小。
  9. 根据权利要求1所述的滤器，其特征在于，所述支撑杆包括靠近所述远心端设置的远心端支撑杆和靠近所述近心端设置的近心端支撑杆。
  10. 根据权利要求9所述的滤器，其特征在于，所述远心端支撑杆和所述近心端支撑杆均包括自所述连接杆向血管壁延伸的引导段以及自所述引导段弯折延伸并与血管壁抵触的支撑段。
  11. 根据权利要求9所述的滤器，其特征在于，所述远心端支撑杆还包括自所述引导段与所述支撑段的连接处向血管壁延伸的固定锚。
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Publication number Priority date Publication date Assignee Title
CN108992202A (zh) * 2018-08-14 2018-12-14 内蒙古工业大学 一种无损伤可回收腔静脉滤器
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1711978A (zh) * 2004-06-25 2005-12-28 深圳市先健科技股份有限公司 左心耳闭塞装置及其输送器
CN101031254A (zh) * 2004-09-27 2007-09-05 库克公司 包括具有轴向弯曲部的支杆的可移除腔静脉过滤器
US20100049238A1 (en) * 2006-12-19 2010-02-25 C.R. Bard, Inc. Inferior vena cava filter with stability features
CN204181741U (zh) * 2014-10-13 2015-03-04 陈奕龙 腔静脉过滤器
CN204909721U (zh) * 2015-06-30 2015-12-30 先健科技(深圳)有限公司 滤器
CN105662646A (zh) * 2015-12-29 2016-06-15 先健科技(深圳)有限公司 滤器
CN105796207A (zh) * 2014-12-30 2016-07-27 先健科技(深圳)有限公司 滤器及其制作方法
CN106308974A (zh) * 2015-06-30 2017-01-11 先健科技(深圳)有限公司 滤器

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206761794U (zh) * 2016-12-01 2017-12-19 先健科技(深圳)有限公司 滤器

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1711978A (zh) * 2004-06-25 2005-12-28 深圳市先健科技股份有限公司 左心耳闭塞装置及其输送器
CN101031254A (zh) * 2004-09-27 2007-09-05 库克公司 包括具有轴向弯曲部的支杆的可移除腔静脉过滤器
US20100049238A1 (en) * 2006-12-19 2010-02-25 C.R. Bard, Inc. Inferior vena cava filter with stability features
CN204181741U (zh) * 2014-10-13 2015-03-04 陈奕龙 腔静脉过滤器
CN105796207A (zh) * 2014-12-30 2016-07-27 先健科技(深圳)有限公司 滤器及其制作方法
CN204909721U (zh) * 2015-06-30 2015-12-30 先健科技(深圳)有限公司 滤器
CN106308974A (zh) * 2015-06-30 2017-01-11 先健科技(深圳)有限公司 滤器
CN105662646A (zh) * 2015-12-29 2016-06-15 先健科技(深圳)有限公司 滤器

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