CN111658224A - Recoverable vena cava filter - Google Patents

Abstract

The invention provides a recyclable vena cava filter, comprising: the recovery part with from at least 3 the structure poles that the recovery part sent, 3 at least structure poles form two at least thrombus filter screens, two supporting disks and a terminal configuration through crooked design, wherein, a thrombus filter screen set up in between recovery part and a supporting disk, another thrombus filter screen sets up the waist between two supporting disks, terminal configuration sets up in another supporting disk and keeps away from the one end of thrombus filter screen, terminal configuration includes a plurality of free ends each other, a plurality of free ends each other to the crooked gathering of axis slope of vena cava filter. The invention can effectively prevent the problems of deflection, deviation, displacement and the like of the vena cava filter, effectively improve the thrombus filtering effect and prolong the safe recovery time.

Description

Translated fromChinese

一种可回收的腔静脉滤器A recyclable vena cava filter

技术领域technical field

本发明涉及一种腔静脉滤器，尤其涉及一种可回收的腔静脉滤器。The invention relates to a vena cava filter, in particular to a recyclable vena cava filter.

背景技术Background technique

肺动脉栓塞（pulmonary embolism,PE）的发病率高且致死率高，可能导致慢性肺动脉高压，严重影响患者的生活质量。下肢深静脉血栓形成（deep vein thrombosis,DVT）是导致肺动脉栓塞的最主要原因，60％～70％的DVT将会发生PE；同时90％～95％肺动脉栓子来源于DVT。由于PE的高发病率、高死亡率、高致残率与DVT有高度相关性，目前抗凝治疗被认为是治疗DVT和预防PE的有效方法；但是对有抗凝禁忌症、抗凝治疗期间出现严重并发症和抗凝失败者，腔静脉滤器（vena cava filter，VCF）是有效预防PE的方法。腔静脉滤器的应用不仅可以有效预防肺栓塞的发生，而且通过静脉滤器来溶栓和手术治疗更为安全有效。Pulmonary embolism (PE) has a high morbidity and mortality rate, which may lead to chronic pulmonary hypertension and seriously affect the quality of life of patients. Deep vein thrombosis (DVT) of the lower extremities is the main cause of pulmonary embolism, and 60% to 70% of DVTs will cause PE; meanwhile, 90% to 95% of pulmonary emboli originate from DVT. Due to the high morbidity, high mortality and high disability rate of PE and DVT, anticoagulation therapy is currently considered to be an effective method for the treatment of DVT and prevention of PE. For severe complications and failure of anticoagulation, vena cava filter (VCF) is an effective method to prevent PE. The application of vena cava filter can not only effectively prevent the occurrence of pulmonary embolism, but also it is safer and more effective for thrombolysis and surgical treatment through vena cava filter.

VCF是一种以类网篮结构放置于人体下腔静脉中，捕获漂浮在血液中的血栓，通常使用金属丝编织或金属管材激光雕刻切割，再经定型、抛光等一系列后处理而制成。目前市场上VCF主要为永久性和临时性植入器械，其中，永久性VCF一经使用，患者必须终身服用抗凝药，且长期植入体内，VCF有发生变形、倾斜、移位和断裂等问题，血管有阻塞甚至被刺破的风险。因此，临床上推荐使用临时性滤器，在病人深静脉血栓发生的急性期置入，急性期过后，血栓脱落的风险减少时再将滤器取出。因此，临床上推荐使用临时性滤器，在病人深静脉血栓发生的急性期置入，急性期过后，血栓脱落的风险减少时再将滤器取出。VCF is a kind of basket-like structure placed in the inferior vena cava of the human body to capture the thrombus floating in the blood. It is usually made of metal wire weaving or metal tube laser engraving and cutting, and then a series of post-processing such as shaping and polishing are used. . At present, VCFs on the market are mainly permanent and temporary implanted devices. Among them, once permanent VCFs are used, patients must take anticoagulants for life, and long-term implantation in the body will cause VCFs to deform, tilt, shift and break. , the blood vessels are at risk of being blocked or even punctured. Therefore, it is clinically recommended to use a temporary filter, which is inserted in the acute phase of the patient's deep vein thrombosis and removed after the acute phase when the risk of thrombus detachment is reduced. Therefore, it is clinically recommended to use a temporary filter, which is inserted in the acute phase of the patient's deep vein thrombosis and removed after the acute phase when the risk of thrombus detachment is reduced.

临时性VCF主要分为开放式和封闭框架式结构滤器，其中，单伞开放式滤器包括多条构造杆，多根构造杆的一端为开放端、另一端汇聚在一起形成封闭端，形成过滤网，多根构造杆从封闭端辐射开并与血管接触，起到固定滤器的作用，由于构造杆末端游离，即使构造杆被血管新生内膜包裹，也可随时根据需要借助外力将构造杆轻松从血管壁分离，对血管内膜无损伤，故开放式滤器的可回收期较长，但由于单伞开放式滤器的一端为开放结构，其开放端的构造杆对血管的支撑力度较弱，在血流、呼吸及外力的影响下，滤器容易倾斜和移位，开放杆末端容易损伤或刺破血管壁，甚至导致血管壁穿孔等并发症，其次单层过滤网过滤效率低。而封闭框架式滤器包括多根构造杆，多根构造杆的两端分别汇聚在一起形成封闭端，构造杆与血管接触，起到固定滤器的作用，封闭的两个端面为过滤网，封闭框架式滤器的稳定性较好，不容易倾斜和移位，过滤效果好，但由于该滤器的两端封闭，若滤器构造杆被新生内膜包裹，构造杆无法从血管壁拔出，只能强行将覆盖构造杆的血管新生内膜撕裂，才可能将滤器取出，如果新生内膜增生较厚无法撕裂，会导致植入的滤器难于取出，回收时间窗期较短。Temporary VCF is mainly divided into open and closed frame structure filters. Among them, a single umbrella open filter includes a plurality of structural rods. One end of the plurality of structural rods is an open end, and the other ends are gathered together to form a closed end, forming a filter screen. , a plurality of structural rods radiate from the closed end and contact the blood vessels, which play the role of fixing the filter. Since the end of the structural rod is free, even if the structural rod is wrapped by angiogenesis intima, the structural rod can be easily removed by external force at any time as needed. The separation of the blood vessel wall does not damage the intima of the blood vessel, so the recovery period of the open filter is longer. Under the influence of flow, breathing and external force, the filter is easy to tilt and shift, and the end of the open rod is easy to damage or puncture the blood vessel wall, and even lead to complications such as blood vessel wall perforation. Secondly, the filtration efficiency of the single-layer filter is low. The closed frame filter includes a plurality of structural rods, and the two ends of the plurality of structural rods are gathered together to form a closed end. The structural rod is in contact with the blood vessel and plays the role of fixing the filter. The two closed end faces are the filter screen, and the closed frame The stability of the filter is good, it is not easy to tilt and shift, and the filtering effect is good, but because the two ends of the filter are closed, if the filter structure rod is wrapped by the neointima, the structure rod cannot be pulled out from the blood vessel wall, and can only be forced Only by tearing the neointima covering the structural rod can the filter be taken out. If the neointimal hyperplasia is too thick and cannot be torn, it will be difficult to remove the implanted filter and the recovery time window will be short.

发明内容SUMMARY OF THE INVENTION

本发明所要解决的技术问题是需要提供一种能够兼顾开放式和封闭框架式滤器优点，并有效延长其安全回收时间窗的可回收的腔静脉滤器。The technical problem to be solved by the present invention is to provide a recyclable vena cava filter that can take into account the advantages of open and closed frame filters and effectively prolong its safe recovery time window.

对此，本发明提供一种可回收的腔静脉滤器，包括：回收部和自所述回收部发出的至少3根构造杆，所述至少3根构造杆通过弯曲定型形成至少两个血栓过滤网、两个支撑盘以及一个末端构型，其中，一个血栓过滤网设置于所述回收部和一个支撑盘之间，另一个血栓过滤网设置于两个支撑盘之间的腰部，所述末端构型设置于另一个支撑盘远离所述血栓过滤网的一端，所述末端构型包括多个相互游离的末端，多个相互游离的末端向所述腔静脉滤器的中轴线倾斜弯曲聚拢。In this regard, the present invention provides a retrievable vena cava filter, comprising: a recovery part and at least three structural rods emitted from the recycling part, the at least three structural rods are formed by bending and shaping to form at least two thrombus filter nets , two support discs and an end configuration, wherein one thrombus filter is arranged between the recovery part and one support disc, and the other thrombus filter is arranged at the waist between the two support discs, and the end structure The type is arranged at one end of the other support disk away from the thrombus filter net, and the end configuration includes a plurality of mutually free ends, and the plurality of mutually free ends are inclined, bent and gathered toward the central axis of the vena cava filter.

本发明的进一步改进在于，每一根构造杆从所述回收部向远离所述回收部的方向分叉成至少2根分支，形成单级或多级分叉形构造杆，在第一次形成接触血管壁的支撑盘前，从回收部发出的构造杆和分叉形构造杆相互交叉或编织形成网格结构的血栓过滤网，所述网格结构优选包括菱形或圆形。A further improvement of the present invention is that each structural rod is bifurcated into at least 2 branches from the recovery portion to the direction away from the recovery portion to form a single-stage or multi-stage bifurcated structural rod. Before contacting the support plate of the vessel wall, the structural rods and the bifurcated structural rods emanating from the recovery portion intersect or weave each other to form a thrombus filter mesh with a grid structure, the grid structure preferably including a diamond or a circle.

本发明的进一步改进在于，所述末端构型远离所述第二支撑盘的一端设置为过渡圆弧化末端，所述过渡圆弧化末端包括圆球状末端或水滴状末端；或，所述末端构型远离所述第二支撑盘的一端设置为过渡软化末端，所述过渡软化末端包括依次连接的过渡段和圆状末端，所述过渡段为逐渐变细或包括绕制弹簧的软化过渡段。A further improvement of the present invention is that the end of the end configuration away from the second support plate is set as a transitional arced end, and the transitional arced end includes a spherical end or a teardrop-shaped end; or, the end One end of the configuration away from the second support disc is set as a transition softening end, the transition softening end includes a transition segment and a rounded end connected in sequence, and the transition segment is a softening transition segment that tapers or includes a coiled spring .

本发明的进一步改进在于，所述回收部为包括对中伞、连接柱和内螺纹的自对中回收部，所述对中伞通过所述连接柱连接至所述第一血栓过滤网，其中，所述对中伞为底部开口的圆锥状构件，所述圆锥状构件的圆锥开口方向远离所述第一血栓过滤网，所述圆锥状构件的圆锥面优选设置有沿轴线间隔分布的开口槽；所述连接柱为一个圆柱体，所述内螺纹设置于所述连接柱内。A further improvement of the present invention is that the recovery part is a self-centering recovery part including a centering umbrella, a connecting post and an internal thread, and the centering umbrella is connected to the first thrombus filter through the connecting post, wherein , the centering umbrella is a conical member with an opening at the bottom, the conical opening of the conical member is away from the first thrombus filter, and the conical surface of the conical member is preferably provided with open grooves spaced along the axis ; The connecting column is a cylinder, and the inner thread is arranged in the connecting column.

本发明的进一步改进在于，沿所述腔静脉滤器中轴线依序设置的回收部、第一血栓过滤网、第一支撑盘、第二血栓过滤网、第二支撑盘以及末端构型，其中，所述回收部的一端同第一血栓过滤网相连接，所述回收部的另一端为连接部；所述第一支撑盘的一端连接至所述第一血栓过滤网，所述第一支撑盘的另一端收口连接至所述第二血栓过滤网；所述第二支撑盘的一端收口连接至所述第二血栓过滤网，所述第二支撑盘的另一端开放连接至所述末端构型；所述第一血栓过滤网分布在所述回收部和第一支撑盘之间，所述第二血栓过滤网分布所述第一支撑盘和第二支撑盘之间的收口的腰部。A further improvement of the present invention is that the recovery part, the first thrombus filter mesh, the first support disc, the second thrombus filter mesh, the second support disc and the end configuration are sequentially arranged along the central axis of the vena cava filter, wherein, One end of the recovery part is connected with the first thrombus filter, and the other end of the recovery part is a connecting part; one end of the first support plate is connected to the first thrombus filter, the first support plate The other end of the second thrombus filter is closed and connected to the second thrombus filter; one end of the second support disk is closed and connected to the second thrombus filter, and the other end of the second support disk is open and connected to the end configuration ; The first thrombus filter screen is distributed between the recovery part and the first support plate, and the second thrombus filter screen is distributed between the first support plate and the second support plate at the waist of the closed mouth.

本发明的进一步改进在于，第一血栓过滤网由多根所述构造杆在所述回收部和第一支撑盘之间弯曲形成圆锥曲面过滤网，其中多根构造杆汇集的一端连接至所述回收部，另一端发散弯曲式连接至所述第一支撑盘并顺滑延伸连接，每根构造杆之间相互间隔，以形成弯曲伞骨状的过滤网格。A further improvement of the present invention is that the first thrombus filter is formed by a plurality of the structural rods being bent between the recovery part and the first support plate to form a conical curved filter screen, wherein one end of the plurality of structural rods is connected to the The other end of the recovery part is connected to the first support plate in a divergent and curved manner and is smoothly extended and connected.

本发明的进一步改进在于，所述第一支撑盘为类圆柱笼体，所述第一支撑盘和/或第二支撑盘上设置远离所述腔静脉滤器中心轴并向外辐射的尖刺状固定锚，所述尖刺状固定锚的向外辐射方向为远离所述回收部的方向。A further improvement of the present invention is that the first support plate is a cylindrical cage, and the first support plate and/or the second support plate are provided with spike-shaped thorns that are far away from the central axis of the vena cava filter and radiate outward. A fixed anchor, the outward radial direction of the spike-shaped fixed anchor is a direction away from the recovery part.

本发明的进一步改进在于，所述第二血栓过滤网由多根构造杆绕所述腔静脉滤器的中心轴并偏离预设距离的轴线，在所述第一支撑盘和第二支撑盘之间弯曲形成空间交错过滤网格。A further improvement of the present invention is that the second thrombus filter mesh is formed by a plurality of structural rods around the central axis of the vena cava filter and deviated from the axis of a preset distance, between the first support plate and the second support plate Curved to form a spatially staggered filter grid.

本发明的进一步改进在于，所述第二血栓过滤网通过多根构造杆空间交错形成具有拉伸变形和收敛成束性能的血栓过滤结构。A further improvement of the present invention is that the second thrombus filtering mesh forms a thrombus filtering structure with tensile deformation and convergence and bunching properties by spatially interlacing a plurality of structural rods.

本发明的进一步改进在于，所述末端构型的一端与所述第二支撑盘延续相连，所述末端构型的另一端向轴线折弯、双折弯或内卷游离。A further improvement of the present invention is that one end of the end configuration is continuously connected to the second support plate, and the other end of the end configuration is bent, double-bent or inwardly freed toward the axis.

与现有技术相比，本发明的有益效果在于：由至少3根构造杆通过弯曲定型形成至少两个血栓过滤网、两个支撑盘以及一个末端构型，进而形成一端约束汇聚，另一端半开放的笼状双盘的整体结构，将本发明植入下腔静脉经可以有效避免器械倾斜，并输送导管到达目标位置，释放后根据其形状膨胀使得两个支撑盘由内向外压迫血管，血管形成两个凸起部位，血管对所述腔静脉滤器形成反向的压力，使得所述腔静脉滤器获得有效的固定力，通过本发明的结构设计能够有效防止所述腔静脉滤器的歪斜、偏移和移位等问题，在结构上保证所述腔静脉滤器的轴线同目标血管的轴线一致重合，并有效提高了血栓过滤效果。Compared with the prior art, the beneficial effect of the present invention is that at least two thrombus filter nets, two support discs and one end configuration are formed by at least three structural rods through bending and shaping, so as to form a constraining convergence at one end and a half at the other end. The overall structure of the open cage-like double disc, the implantation of the present invention into the inferior vena cava can effectively avoid the inclination of the instrument, and the delivery catheter can reach the target position. Two convex parts are formed, and the blood vessels form a reverse pressure on the vena cava filter, so that the vena cava filter can obtain an effective fixing force. The structural design of the present invention can effectively prevent the vena cava filter from being skewed and biased Structurally, the axis of the vena cava filter is guaranteed to coincide with the axis of the target blood vessel, and the thrombus filtering effect is effectively improved.

在此基础上，本发明还通过其优化的结构设计，使得所述腔静脉滤器能够针对目标血管的压力环境拥有了自适应能力，支撑盘得以依据血管壁的压力和血管变化的血压实现对支撑盘的大小和形状的调整，提高了所述腔静脉滤器的支撑适应能力，防止过大的支撑力对血管形成过度刺激或损伤，大幅度提高了产品的安全性能；并且，还能够有效延缓血管对所述腔静脉滤器的内皮化速度，有效延长了所述腔静脉滤器的安全植入时间，延长其安全回收时间窗。On this basis, the present invention also enables the vena cava filter to have self-adaptive ability according to the pressure environment of the target blood vessel through its optimized structural design, and the support plate can support the blood vessel wall according to the pressure of the blood vessel wall and the blood pressure of the blood vessel changes. The adjustment of the size and shape of the disc improves the support adaptability of the vena cava filter, prevents excessive stimulation or damage to the blood vessels caused by excessive supporting force, and greatly improves the safety performance of the product; and can effectively delay the blood vessels. The endothelialization speed of the vena cava filter effectively prolongs the safe implantation time of the vena cava filter and prolongs the safe recovery time window.

附图说明Description of drawings

图1是构造杆被增殖组织包裹的结构示意图；Fig. 1 is the structural schematic diagram of the structure rod being wrapped by proliferating tissue;

图2是构造杆从血管增生内膜取出的结构示意图；Fig. 2 is the structural schematic diagram of the structure rod taken out from the intima of vascular hyperplasia;

图3是本发明一种实施例中单独一条构造杆的投影结构示意图；Fig. 3 is the projection structure schematic diagram of a single construction rod in an embodiment of the present invention;

图4是本发明一种实施例中构造杆形成多级分叉形构造杆的植入立体结构示意图；4 is a schematic diagram of the implantation three-dimensional structure of the multi-level bifurcated structural rod formed by the structural rod in an embodiment of the present invention;

图5是本发明一种实施例中构造杆形成多级分叉形构造杆的植入剖面结构示意图；5 is a schematic diagram of the implantation cross-sectional structure of the multi-level bifurcated structural rod formed by the structural rod in an embodiment of the present invention;

图6是本发明一种实施例在血管中的植入部位结构示意图；6 is a schematic structural diagram of an implantation site in a blood vessel according to an embodiment of the present invention;

图7是本发明一种实施例的末端构型进行过渡圆弧化设计的结构示意图；FIG. 7 is a schematic structural diagram of the transition arc design of the end configuration according to an embodiment of the present invention;

图8是本发明一种实施例对末端构型进行软化结构处理的结构示意图；FIG. 8 is a schematic structural diagram of the softening structure process performed on the terminal configuration according to an embodiment of the present invention;

图9是本发明一种实施例的自对中回收部的立体结构示意图；9 is a schematic three-dimensional structure diagram of a self-centering recovery part according to an embodiment of the present invention;

图10是本发明一种实施例的自对中回收部的剖面结构示意图；10 is a schematic cross-sectional structure diagram of a self-centering recovery part according to an embodiment of the present invention;

图11是本发明实施例1的立体结构示意图；FIG. 11 is a schematic three-dimensional structure diagram ofEmbodiment 1 of the present invention;

图12是本发明实施例1的主视结构示意图；Fig. 12 is the front view structure schematic diagram ofEmbodiment 1 of the present invention;

图13是本发明实施例1的部分构件侧视结构示意图；Figure 13 is a schematic side view of the structure of some components ofEmbodiment 1 of the present invention;

图14是本发明一种实施例的末端构型不同形状的结构示意图；FIG. 14 is a schematic structural diagram of different shapes of end configurations according to an embodiment of the present invention;

图15是本发明实施例2的立体结构示意图；FIG. 15 is a schematic three-dimensional structure diagram ofEmbodiment 2 of the present invention;

图16是本发明实施例2的主视结构示意图；Fig. 16 is the front view structure schematic diagram ofEmbodiment 2 of the present invention;

图17是本发明实施例3的立体结构示意图；FIG. 17 is a schematic three-dimensional structure diagram ofEmbodiment 3 of the present invention;

图18是本发明实施例3的主视结构示意图；Fig. 18 is the front view structure schematic diagram ofEmbodiment 3 of the present invention;

图19是本发明实施例4的立体结构示意图；FIG. 19 is a schematic three-dimensional structure diagram ofEmbodiment 4 of the present invention;

图20是本发明实施例4的主视结构示意图；Fig. 20 is the front view structure schematic diagram ofEmbodiment 4 of the present invention;

图21是本发明实施例5的立体结构示意图；FIG. 21 is a schematic three-dimensional structure diagram of Embodiment 5 of the present invention;

图22是本发明实施例5的主视结构示意图；Fig. 22 is the front view structure schematic diagram of Embodiment 5 of the present invention;

图23是本发明实施例5的侧视结构示意图。FIG. 23 is a schematic side view of the structure of Embodiment 5 of the present invention.

具体实施方式Detailed ways

下面结合附图，对本发明的较优的实施例作进一步的详细说明。The preferred embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

针对现有技术的缺点，如何同时兼顾开放式和封闭框架式的滤器优点，最大程度延长滤器安全回收时间窗，并且确保滤器在体内的稳定性是一个亟待解决的难题，因此，本例旨在提供一种新型的可回收的腔静脉滤器，在保证所述腔静脉滤器对血栓高效拦截性能下，具有长时间可回收操作窗口时间，植入体内不易移位，并且可反复回收和释放、精确定位，方便放置和回收。该腔静脉滤器可由金属或高分子材料等制成，优选采用一个整体的镍钛合金管进行切割定型而成，或优选采用记忆合金丝、线、带编制等连接而成。In view of the shortcomings of the prior art, how to take into account the advantages of both open and closed frame filters, maximize the safe recovery time window of the filter, and ensure the stability of the filter in vivo is an urgent problem to be solved. Therefore, this example aims to A new type of recyclable vena cava filter is provided, which has a long recyclable operation window time while ensuring the efficient interception performance of the vena cava filter on thrombus, and is not easy to be displaced when implanted in the body, and can be repeatedly recovered and released with high precision. Positioned for easy placement and recycling. The vena cava filter can be made of metal or polymer materials, etc., and is preferably formed by cutting and shaping an integral nickel-titanium alloy tube, or preferably connected by memory alloy wires, wires, tapes, and the like.

实施例1：Example 1:

如图1至图13所示，本例提供一种可回收的腔静脉滤器，包括：回收部11和自所述回收部11发出的至少3根构造杆1，所述至少3根构造杆1通过弯曲定型形成至少两个血栓过滤网、两个支撑盘以及一个末端构型16，其中，一个血栓过滤网设置于所述回收部11和一个支撑盘之间，另一个血栓过滤网设置于两个支撑盘之间的腰部，所述末端构型16设置于另一个支撑盘远离所述血栓过滤网的一端，所述末端构型16包括多个相互游离的末端，多个相互游离的末端向所述腔静脉滤器的中轴线倾斜弯曲聚拢。所述支撑盘的径向宽度优选大于所述血栓过滤网的径向宽度使得所述血栓过滤网不接触血管壁3。本例所述可回收的腔静脉滤器简称腔静脉滤器或滤器。本例所述腔静脉滤器的中轴线也可以简称轴线。As shown in FIGS. 1 to 13 , this example provides a retrievable vena cava filter, comprising: arecovery part 11 and at least threestructural rods 1 emitted from therecycling part 11 , the at least threestructural rods 1 At least two thrombus filter meshes, two support discs and anend configuration 16 are formed by bending and shaping, wherein one thrombus filter mesh is arranged between therecovery part 11 and one support disc, and the other thrombus filter mesh is arranged between the two thrombus filter meshes. At the waist between the two support discs, theend configuration 16 is arranged at one end of the other support disc away from the thrombus filter. Theend configuration 16 includes a plurality of mutually free ends, and the plurality of mutually free ends are directed The central axis of the vena cava filter is obliquely curved and gathered. The radial width of the support disk is preferably larger than the radial width of the thrombus filter so that the thrombus filter does not contact thevessel wall 3 . The recyclable vena cava filter described in this example is referred to as a vena cava filter or filter for short. The central axis of the vena cava filter in this example may also be referred to as the axis for short.

本例所支撑盘的径向宽度大于所述血栓过滤网的径向宽度，即所述第一支撑盘13和第二支撑盘15的径向宽度大于所述第一血栓过滤网12和第二血栓过滤网14的径向宽度，这样的设计好处在于能够使得所述第一血栓过滤网12和第二血栓过滤网14不会直接接触血管壁3（远离血管壁3），能够有效延长所述腔静脉滤器的安全回收时间窗。The radial width of the supported disk in this example is larger than the radial width of the thrombus filter, that is, the radial width of thefirst support disk 13 and thesecond support disk 15 are larger than thefirst thrombus filter 12 and thesecond support disk 15. The radial width of thethrombus filter 14, the advantage of this design is that thefirst thrombus filter 12 and thesecond thrombus filter 14 do not directly contact the blood vessel wall 3 (away from the blood vessel wall 3), which can effectively extend the Time window for safe recovery of vena cava filters.

更为具体的，如图11至图13所示，本例沿所述腔静脉滤器中轴线依序设置的回收部11、第一血栓过滤网12、第一支撑盘13、第二血栓过滤网14、第二支撑盘15以及末端构型16，其中，所述回收部11的一端同第一血栓过滤网12相连接，所述回收部11的另一端为连接部；所述第一支撑盘13的一端连接至所述第一血栓过滤网12，所述第一支撑盘13的另一端收口连接至所述第二血栓过滤网14；所述第二支撑盘15的一端收口连接至所述第二血栓过滤网14，所述第二支撑盘15的另一端开放连接至所述末端构型16；所述第一血栓过滤网12分布在所述回收部11和第一支撑盘13之间，所述第二血栓过滤网14分布所述第一支撑盘13和第二支撑盘15之间的收口的腰部。More specifically, as shown in FIGS. 11 to 13 , in this example, therecovery part 11 , thefirst thrombus filter 12 , thefirst support plate 13 , and the second thrombus filter are sequentially arranged along the central axis of the vena cava filter. 14. Thesecond support plate 15 and theend configuration 16, wherein one end of therecovery portion 11 is connected with thefirst thrombus filter 12, and the other end of therecovery portion 11 is a connecting portion; the first support plate One end of 13 is connected to thefirst thrombus filter 12, the other end of thefirst support plate 13 is connected to thesecond thrombus filter 14; one end of thesecond support plate 15 is connected to the Thesecond thrombus filter 14, the other end of thesecond support disc 15 is openly connected to theend configuration 16; thefirst thrombus filter 12 is distributed between therecovery portion 11 and thefirst support disc 13 , the secondthrombus filtering net 14 distributes the closed waist between thefirst support plate 13 and thesecond support plate 15 .

进一步的，本例还可以优选包括第三血栓过滤网，所述第三血栓过滤网视具体情况决定是否设置，可以类似于所述第二血栓过滤网14那样来设置，用于增强其过滤效果；所述回收部11的另一端为连接部，该连接部优选为勾状或螺纹等多种形态的易连接部，便于回收。Further, this example may also preferably include a third thrombus filter, and the third thrombus filter may be set according to specific conditions, and may be set similarly to thesecond thrombus filter 14 to enhance its filtering effect. ; The other end of therecovery portion 11 is a connecting portion, which is preferably an easy-connecting portion in various forms such as hook or thread, which is convenient for recovery.

如图13所示，本例第一血栓过滤网12由多根所述构造杆1在所述回收部11和第一支撑盘13之间弯曲形成圆锥曲面过滤网，其中多根构造杆1汇集的一端连接至所述回收部11，另一端发散弯曲式连接至所述第一支撑盘13并顺滑延伸连接，每根构造杆1之间相互间隔，以形成弯曲伞骨状的过滤网格，便于提高血栓过滤效果。As shown in FIG. 13 , thefirst thrombus filter 12 in this example is formed by a plurality of thestructural rods 1 which are bent between therecovery portion 11 and thefirst support plate 13 to form a conical curved filter screen, wherein the plurality ofstructural rods 1 are collected One end is connected to therecovery part 11, the other end is connected to thefirst support plate 13 in a divergent and curved manner and is smoothly extended and connected, and eachstructural rod 1 is spaced from each other to form a curved umbrella-shaped filter grid , which is convenient to improve the thrombus filtering effect.

也就是说，本例优选由一端约束汇聚，另一端半开放整体结构，构成笼状双盘结构，对所述腔静脉滤器整体径向方向给予约束，所述腔静脉滤器具有适中性，当所述腔静脉滤器植入下腔静脉经时，可以有效避免器械倾斜，导致回收部贴近血管壁，无法回收现象，加强其回收性能。That is to say, in this example, one end is preferably constrained to converge, and the other end is a semi-open integral structure to form a cage-like double-disk structure, which constrains the overall radial direction of the vena cava filter. When the vena cava filter is implanted in the inferior vena cava meridian, the device can be effectively prevented from tilting, which causes the recovery part to be close to the vessel wall and cannot be recovered, thereby enhancing its recovery performance.

本例所述腔静脉滤器可从颈静脉或股静脉入路植入，植入时将所述腔静脉滤器收至输送鞘中，送达目标位置，回撤管释放后器械，由于器械使用具有记忆材料制成，释放后恢复原形状膨胀，第一支撑盘13和第二支撑盘15由内向外压迫血管，血管形成两个凸起部位，血管对所述腔静脉滤器形成反向的夹握力，所述腔静脉滤器获得有效的固定力，所述腔静脉滤器具有可靠的定位能力，避免植入滤器的沿血管轴线的移位，如获得更强的定位，可辅助采用在支撑盘设置尖凸状固定锚结构。本例采用双盘支撑结构，有效防止滤器的歪斜、偏移和移位，结构上保证所述腔静脉滤器的轴线同目标血管的轴一致重合，精确定位。The vena cava filter in this example can be implanted through the jugular vein or femoral vein. When implanting, the vena cava filter is received into the delivery sheath and delivered to the target position. After the retraction tube is released, the device has The vena cava filter is made of memory material. After release, the original shape is restored. Thefirst support plate 13 and thesecond support plate 15 compress the blood vessels from the inside to the outside. , the vena cava filter can obtain an effective fixing force, and the vena cava filter has a reliable positioning ability to avoid the displacement of the implanted filter along the axis of the blood vessel. Convex anchor structure. This example adopts a double-disk support structure, which effectively prevents the filter from being skewed, deviated and displaced, and structurally ensures that the axis of the vena cava filter coincides with the axis of the target blood vessel and is precisely positioned.

本例采用整体半开放结构，所述构造杆1呈正或反“S”形，血管对前后的第一支撑盘13和第二支撑盘15的夹握力，通过所述构造杆1的“S”构型进行传递，形成相互支撑，进而能够自适应目标血管压力环境，自调整支撑盘的大小和形状，形成合适的滤器支撑力，防止过大的支撑力对血管形成较大的压力，过度刺激血管。在此基础上，即使第一支撑盘13和第二支撑盘15被新生内膜包裹，由于组成支撑盘的构造杆1没有逆向的分叉结构，即不存在分支向主支方向的分叉结构，在近端回收部11上加载一定的回收力，随着所述构造杆1变形，就可以将已有内皮化的所述腔静脉滤器从血管内膜完整抽离出来，避免对血管壁3的撕裂，得以有效延长所述腔静脉滤器的回收时间。This example adopts an overall semi-open structure, and thestructural rod 1 is in the shape of a positive or reverse "S". The configuration is transferred to form mutual support, and then it can adapt to the target blood vessel pressure environment, self-adjust the size and shape of the support plate, form a suitable filter support force, and prevent excessive support force from forming a large pressure on blood vessels and excessive stimulation. Blood vessel. On this basis, even if thefirst support plate 13 and thesecond support plate 15 are wrapped by neointima, since thestructural rod 1 constituting the support plate has no reverse bifurcation structure, that is, there is no bifurcation structure branching to the direction of the main branch , load a certain recovery force on theproximal recovery portion 11, and as thestructural rod 1 deforms, the vena cava filter that has been endothelialized can be completely removed from the intima of the blood vessel, avoiding damage to theblood vessel wall 3 The tearing of the vena cava filter can effectively prolong the recovery time of the vena cava filter.

如图1所示，滤器在植入人体后，以血管壁3接触的部件，不可避免存在一定程度的内皮化现象，若滤器构造杆1被新生内膜包裹，构造杆1与血管壁3形成一体，构造杆1将无法从血管壁拔出，只能强行将覆盖构造杆的血管新生内膜2撕裂，才可能将滤器取出，如果新生内膜2增生较厚无法撕裂，滤器就无法取出，针对该问题，本例采用创新的结构设计，如图2所示，优化滤器的结构和保持所述构造杆1一端游离，滤器回收时，构造杆1从血壁的新生内膜2中抽出，不采用撕裂的方式，采用从新生内膜2中取出构造杆1，降低滤器取出的难度，延长滤器的可回收时间，其中滤器的基本单元，所述构造杆1在同血管壁3接触部位被新生内膜2的增生组织包裹正常血管。As shown in Fig. 1, after the filter is implanted into the human body, the parts in contact with theblood vessel wall 3 inevitably have a certain degree of endothelialization. If the filterstructural rod 1 is wrapped by the neointima, thestructural rod 1 and theblood vessel wall 3 will form As a whole, thestructural rod 1 cannot be pulled out from the vessel wall, and the filter can only be taken out by forcibly tearing theneointima 2 covering the structural rod. If theneointima 2 is too thick to be torn, the filter cannot be To solve this problem, this example adopts an innovative structural design, as shown in Figure 2, to optimize the structure of the filter and keep one end of thestructural rod 1 free. When the filter is recovered, thestructural rod 1 is removed from theneointima 2 of the blood wall. Extraction, instead of tearing, adopts thestructure rod 1 to be taken out from theneointima 2, which reduces the difficulty of filter extraction and prolongs the recovery time of the filter. The basic unit of the filter, thestructure rod 1 is in thesame vessel wall 3. The contact site is surrounded by normal blood vessels with proliferative tissue ofneointima 2.

本例所述构造杆1在同血管壁3直接接触部位被新生内膜2的增殖组织包裹，构造杆1没有逆方向分叉结构，受到回收方向的力，变形拉直，从增殖组织内抽出而与增殖组织分离，血管壁3只留下构造杆1的占位空腔4，如图2所示，避免对血管新生内膜撕裂和易于取出滤器。In this example, thestructural rod 1 is wrapped by the proliferative tissue of theneointima 2 at the part in direct contact with theblood vessel wall 3. Thestructural rod 1 has no bifurcation structure in the opposite direction, and is deformed and straightened by the force in the recovery direction, and is pulled out from the proliferative tissue. Separated from the proliferating tissue, thevessel wall 3 leaves only the space-occupyingcavity 4 of thestructural rod 1 , as shown in FIG. 2 , to avoid tearing the intima of angiogenesis and to easily remove the filter.

本例所述腔静脉滤器包括由自回收部11上发出远离中轴线的至少3根构造杆1，每1根构造杆1如图3所示呈正反“S” 形弯曲定型形成，或正反“3”形弯曲定型形成，在不同的位置形成不同的区域段，形成不同的功能区段，如前述的支撑盘、血栓过滤网和末端构型16，也就是说，本例所述回收部11为用于实现回收的连接部，而所述构造杆1为如图1至图3所示的所述腔静脉滤器的基本单元，所述构造杆1包括第一血栓过滤网12、第一支撑盘13、第二血栓过滤网14、第二支撑盘15以及末端构型16，不同的构件名称是构造杆1位于不同部位用于实现不同功能的一个区间段划分，依序排列，在结构上没有明显的区分标记，所述腔静脉滤器包括多条构造杆1一体连续延伸、变形构型组成，多个所述末端构型16的形状和长度可以根据实际情况的不同的自定义设置或调整，即其形状和长度可以不相同，即所述末端构型16为所述构造杆1的具有不同形状和长度的末端。The vena cava filter in this example includes at least threestructural rods 1 emanating from therecovery portion 11 away from the central axis. The reverse "3" shape is formed by bending and shaping, forming different regional segments at different positions, forming different functional segments, such as the aforementioned support plate, thrombus filter mesh andend configuration 16, that is, the recovery described in this example Thepart 11 is a connecting part for realizing recovery, and thestructural rod 1 is the basic unit of the vena cava filter as shown in Figs. Asupport plate 13, a secondthrombus filter mesh 14, asecond support plate 15 and aterminal configuration 16, the different names of the components are an interval division of thestructure rod 1 located in different parts to achieve different functions, arranged in sequence, in the There is no obvious distinguishing mark on the structure. The vena cava filter includes a plurality ofstructural rods 1 that extend continuously and are composed of deformed configurations, and the shapes and lengths of the plurality of theterminal configurations 16 can be customized according to the actual situation. Or adjusted, ie its shape and length can be different, ie theend configuration 16 is the end of theconstruction rod 1 having a different shape and length.

其中，本例所述第一支撑盘13和第二支撑盘15与血管壁3相接触，第一血栓过滤网12和第二血栓过滤网14不与血管壁3直接接触，构造杆1的一端相聚拢汇集于回收部11，另一端在释放状态下处于游离状态。In this example, thefirst support plate 13 and thesecond support plate 15 are in contact with theblood vessel wall 3 , thefirst thrombus filter 12 and thesecond thrombus filter 14 are not in direct contact with theblood vessel wall 3 , and one end of therod 1 is constructed. The phases are gathered and collected in therecovery part 11, and the other end is in a free state in a released state.

如图3所示，单独一条构造杆1投影到滤器轴线平面或平行轴线平面，沿所述腔静脉滤器的中轴线211左右交叉弯曲，在垂直于所述腔静脉滤器的中轴线的平面212上下交错弯曲，单独的构造杆1在所述腔静脉滤器的中轴线平面或平行轴线平面投影呈“S”形，或反“S”形。As shown in FIG. 3 , a singlestructural rod 1 is projected onto the filter axis plane or parallel axis plane, and is bent left and right along thecentral axis 211 of the vena cava filter, up and down on theplane 212 perpendicular to the central axis of the vena cava filter Staggered and curved, the individualstructural rods 1 are projected on the central axis plane or parallel axis plane of the vena cava filter in an "S" shape, or an inverse "S" shape.

如图4和图5所示，本例每一根构造杆1从所述回收部11向远离所述回收部11的方向分叉成至少2根分支，形成单级或多级分叉形构造杆1，在第一次形成接触血管壁的支撑盘前，从回收部11发出的构造杆1和分叉形构造杆1相互交叉或编织形成网格结构的血栓过滤网，所述网格结构包括菱形或圆形。As shown in FIG. 4 and FIG. 5 , in this example, eachstructural rod 1 bifurcates into at least two branches from therecovery portion 11 to the direction away from therecovery portion 11 , forming a single-stage or multi-stagebifurcated structure Rod 1, before the first formation of the support plate contacting the vessel wall, thestructural rod 1 and the bifurcatedstructural rod 1 emitted from therecovery part 11 cross each other or weave to form a thrombus filter mesh with a grid structure, the grid structure Including rhombus or circle.

比如：构造杆1包括回收部11的主分支和次级分支构造杆，其中次级分支构造杆包括一级分支构造杆101和二级分支构造杆1001，所述二级分支构造杆1001为一级分支构造杆101的分支，进而形成整体的多级分叉形构造杆1。每一根构造杆1从回收部向远端任意位置可分叉成2根或2根以上次级分支构造杆，形成单根或多级、多个小的一级分支构造杆101和二级分支构造杆1001；构造杆1在同血管壁3直接接触部位被增殖组织包裹，从分支向主干方向定义为正方向，相反定义为逆方向，滤器承受正方向的回收拉力，所述构造杆1没有逆方向分叉结构，在受到回收部的拉力，变形拉直，至少2条二级分支构造杆1001向一级分叉构造杆101正方向收敛位移，至少2条次级分支构造杆向所述回收部11的主分支正方向收敛位移，进而滤器从增殖组织内抽出分离，血管壁3内仅留下所述构造杆1占位空腔，避免对静脉血管的撕裂。本例多个一级分支构造杆101和二级分支构造杆1001相互交叉实现过滤结构可以直接当成第一血栓过滤网12。For example, theconstruction rod 1 includes a main branch and a secondary branch construction rod of therecovery part 11, wherein the secondary branch construction rod includes a primarybranch construction rod 101 and a secondarybranch construction rod 1001, and the secondarybranch construction rod 1001 is a The branches of the stage-branchedconstruction rod 101 in turn form an integral multi-stagebifurcated construction rod 1 . Eachstructural rod 1 can be bifurcated into 2 or more secondary branch structural rods from the recovery part to any position at the distal end, forming single or multi-stage, multiple small primary branchstructural rods 101 and secondary branch structural rods. Thebranch structure rod 1001; thestructure rod 1 is wrapped by the proliferating tissue at the part in direct contact with theblood vessel wall 3, the direction from the branch to the main trunk is defined as the positive direction, and the opposite is defined as the reverse direction, the filter bears the recovery pulling force in the positive direction, thestructure rod 1 There is no bifurcation structure in the opposite direction. After receiving the pulling force of the recovery part, it is deformed and straightened, and at least two secondary branchstructural rods 1001 converge and displace in the positive direction of the primary bifurcatedstructural rod 101, and at least two secondary branch structural rods move toward all the The main branch of therecovery part 11 converges and displaces in the positive direction, and then the filter is pulled out and separated from the proliferating tissue, leaving only the space occupied cavity of thestructural rod 1 in theblood vessel wall 3 to avoid tearing the venous blood vessel. In this example, a plurality of primarybranch structure rods 101 and secondarybranch structure rods 1001 cross each other to realize that the filtering structure can be directly regarded as the firstthrombus filter mesh 12 .

如图6所示，本例提供的所述腔静脉滤器，置于肾静脉9和髂静脉8之间的下腔静脉7位置，放置方向可以顺着血流方向或逆着血流方向，可采用介入方法经颈静脉或股静脉，用输送/回收鞘管进行定位、释放、适时从体内回收。在植入期间，在滤器和血管壁接触位置会产生新生内膜2的增生组织，包裹所述腔静脉滤器的支撑盘。As shown in Figure 6, the vena cava filter provided in this example is placed at the position of the inferior vena cava 7 between the renal vein 9 and the iliac vein 8, and the placement direction can be along the blood flow direction or against the blood flow direction, and can be Through the jugular or femoral vein, the delivery/retrieval sheath is used to locate, release, and retrieve from the body in a timely manner. During implantation, proliferative tissue of theneointima 2 is created at the point of contact between the filter and the vessel wall, surrounding the support disc of the vena cava filter.

如图7所示，本例所述末端构型16远离所述第二支撑盘15的一端设置为过渡圆弧化末端60，所述过渡圆弧化末端包括圆球状末端或水滴状末端；或，如图8所示，所述末端构型16远离所述第二支撑盘15的一端设置为过渡软化末端70或过渡软化末端70’，所述过渡软化末端70或过渡软化末端70’包括依次连接的过渡段和圆状末端，所述过渡段为逐渐变细或包括绕制弹簧的软化过渡段。As shown in FIG. 7 , the end of theend configuration 16 away from thesecond support plate 15 in this example is set as a transitional arcedend 60 , and the transitional arced end includes a spherical end or a teardrop-shaped end; or 8 , the end of theend configuration 16 away from thesecond support plate 15 is set as atransition softening end 70 or atransition softening end 70 ′, and thetransition softening end 70 ortransition softening end 70 ′ includes sequentially A connected transition section and a rounded end, the transition section being a tapering or softening transition section including a coiled spring.

为进一步避免释放、回收和植入过程中刺伤血管，避免自由末端构型对血管壁刺伤，同时减少滤器回收阻力，如图7所示，本例对所述末端构型16做一个圆滑化处理，如过渡圆弧化末端60通过二次加工尾部圆球化，其尾端形状可以呈圆球和水滴状等过渡圆弧化，进一步的，还可以连接一个球状物，球状物可以为金、钨、铂等金属和含前述金属的合金以及聚合物等。In order to further avoid stabbing the blood vessel during the release, recovery and implantation process, avoid stabbing the blood vessel wall by the free end configuration, and reduce the filter recovery resistance, as shown in FIG. For example, thetransitional arcing end 60 is spheroidized by the secondary processing of the tail, and the shape of the tail end can be transitional arcing such as a sphere or a water drop. Further, a sphere can also be connected, and the sphere can be Metals such as gold, tungsten, platinum, and alloys and polymers containing the aforementioned metals, and the like.

再进一步的，如图8所示，本例对所述末端构型16做一个软化结构处理，如过渡软化末端70的尾部采用由逐渐变细的过渡段76、金属弹簧绕制成为软化过渡段77以及最前端的圆帽78，避免刺伤血管。还可以对末端构型16做一个锥度细化，如过渡软化末端70’的尾部为逐渐变细的过渡段76’,末端79为小圆状，通过这种尾端直径的细和/或软设计，进而能够有效避免刺伤血管。Further, as shown in FIG. 8 , theend configuration 16 is subjected to a softening structure treatment in this example. For example, the tail of thetransition softening end 70 is made of a gradually taperedtransition section 76 and a metal spring wound to form a softening transition section. 77 and theround cap 78 at the front end to avoid stabbing blood vessels. Theend configuration 16 can also be tapered and refined, such as the transitional softening end 70' has a tapered transition section 76', and theend 79 is a small round shape. Design, which can effectively avoid stabbing blood vessels.

如图9和图10所示，本例所述回收部11为包括对中伞911、连接柱912和内螺纹913的自对中回收部11，所述对中伞911通过所述连接柱912连接至所述第一血栓过滤网12，其中，所述对中伞911为底部开口的圆锥状构件，所述圆锥状构件的圆锥开口方向远离所述第一血栓过滤网12，所述圆锥状构件的圆锥面设置有沿轴线间隔分布的开口槽；所述连接柱912为一个圆柱体，所述内螺纹913为设置于所述连接柱912内的螺纹结构，在图9和图10中，仅仅标识出其位置，没有将螺纹画出。As shown in FIG. 9 and FIG. 10 , therecovery part 11 in this example is a self-centeringrecovery part 11 including a centeringumbrella 911 , a connectingcolumn 912 and aninternal thread 913 , and the centeringumbrella 911 passes through the connectingcolumn 912 Connected to thefirst thrombus filter 12, wherein the centeringumbrella 911 is a conical member with an opening at the bottom, the conical opening of the conical member is away from thefirst thrombus filter 12, and the conical The conical surface of the component is provided with open grooves spaced along the axis; the connectingcolumn 912 is a cylinder, and theinternal thread 913 is a threaded structure arranged in the connectingcolumn 912. In FIGS. 9 and 10, Only the position is marked, the thread is not drawn.

也就是说，除了图11和图12的这种基本的回收部11的设计之外，本例还可以优选采用图9和图10所示的优选设计进而实现了自对中的滤器回收部结构，所述回收部11位于滤器的一端同所述第一血栓过滤网12连接，由对中伞911、连接柱912、内螺纹913组成，其中对中伞911为一底部开口的圆锥状，圆锥开口方向远离滤器，圆锥面有沿轴线间隔分布的开口槽，避免过多干扰血流的流动，同时也便于带螺栓头的弹簧软轴的进入。所述连接柱912为一个圆柱体且与滤器的第一血栓过滤部12连接，所述内螺纹913处于所述连接柱912内，用于滤器的拆卸，连接。因此，本例提供了两种回收方式，采用前端带螺栓头的弹簧软轴进入圆锥形状的对中伞911较大的区域，可顺利同通过所述内螺纹912连接，方便滤网的回收；或，采用金属圈套器，很容易定位到所述对中伞911外圆锥面，拉紧固定，也能够方便滤器的回收。That is to say, in addition to the basic design of therecovery part 11 shown in FIGS. 11 and 12 , the preferred design shown in FIGS. 9 and 10 can also be used in this example to realize a self-centering filter recovery part structure. , therecovery part 11 is located at one end of the filter and is connected with the firstthrombus filter screen 12, and is composed of a centeringumbrella 911, a connectingcolumn 912, and aninner thread 913, wherein the centeringumbrella 911 is a conical shape with an opening at the bottom. The opening direction is away from the filter, and the conical surface has open grooves spaced along the axis, which avoids excessive interference with the flow of blood flow, and also facilitates the entry of the spring flexible shaft with the bolt head. Theconnection post 912 is a cylinder and is connected to the firstthrombus filtering part 12 of the filter, and theinner thread 913 is located in theconnection post 912 for disassembly and connection of the filter. Therefore, this example provides two recovery methods. The spring flexible shaft with the bolt head at the front end is used to enter the larger area of the conical centeringumbrella 911, which can be smoothly connected with theinner thread 912, which is convenient for the recovery of the filter screen; Or, using a metal snare, it can be easily positioned on the outer conical surface of the centeringumbrella 911, and it can be tightened and fixed, which can also facilitate the recovery of the filter.

值得一提的是，本例所述第一支撑盘13为类圆柱笼体，包括由所述第一血栓过滤网12的一端延伸的多条所述构造杆1，所述第二血栓过滤网14另一端延伸弯曲收口于第一支撑盘13和第二支撑盘15之间的腰部，所述第一支撑盘13和/或第二支撑盘15上设置远离所述腔静脉滤器中心轴并向外辐射的尖刺状固定锚，所述尖刺状固定锚的向外辐射方向为远离所述回收部11的方向，从而进一步避免所述腔静脉滤器的移位，并加强所述腔静脉滤器的定位能力。It is worth mentioning that thefirst support plate 13 in this example is a cylindrical cage, including a plurality of thestructural rods 1 extending from one end of thefirst thrombus filter 12, and thesecond thrombus filter 12. The other end of 14 extends and bends and is closed at the waist between thefirst support plate 13 and thesecond support plate 15. Thefirst support plate 13 and/or thesecond support plate 15 are arranged away from the central axis of the vena cava filter and move toward the center of the vena cava filter. Externally radiated spike-shaped anchors, the radial direction of the spike-shaped anchors is a direction away from therecovery portion 11, so as to further avoid the displacement of the vena cava filter and strengthen the vena cava filter positioning capability.

同样值得一提的是，本例所述第二血栓过滤网14由多根构造杆1绕所述腔静脉滤器的中心轴并偏离预设距离的轴线，所述第一血栓过滤网12和第二血栓过滤网14之间弯曲形成空间交错过滤网格，也就是说，本例所述第二血栓过滤网14由各构造杆1绕所述腔静脉滤器的中心轴并偏离预设距离轴线，该预设距离可以根据实际设计或使用需求进行自定义设计和调整，使得所述第二血栓过滤网14在所述第一支撑盘13和第二支撑盘15之间弯曲形成空间交错形成，投影到垂直于轴线的平面呈现过滤网格状，该第二血栓过滤网14的过滤网格状轴线与所述第一血栓过滤网12的过滤网格轴线交错设置，便于更进一步提高血栓过滤效果。It is also worth mentioning that thesecond thrombus filter 14 in this example is composed of a plurality ofstructural rods 1 around the central axis of the vena cava filter and is deviated from the axis of the preset distance, thefirst thrombus filter 12 and the second thrombus filter The twothrombus filters 14 are curved to form a space interlaced filter grid, that is to say, thesecond thrombus filter 14 in this example is formed by eachstructural rod 1 around the central axis of the vena cava filter and deviates from the axis by a preset distance, The preset distance can be custom designed and adjusted according to actual design or usage requirements, so that the secondthrombus filter mesh 14 is curved between thefirst support plate 13 and thesecond support plate 15 to form a space staggered, projected The plane perpendicular to the axis presents a filter grid shape, and the filter grid axis of the secondthrombus filter screen 14 and the filter grid axis of the firstthrombus filter screen 12 are arranged staggered, so as to further improve the thrombus filtering effect.

此外，本例所述第二支撑盘15由多条构造杆1弯曲形成，形成呈类“U”形开口笼体，即半开口式笼体结构，该第二支撑盘15的一端由所述第一支撑盘13和第二支撑盘15之间的腰部的第二血栓过滤网14延伸弯曲形成，另一端与所述末端构型16顺序相连，同样的，本例所述第一支撑盘15上优选设置远离所述腔静脉滤器的中心轴向外辐射的小的尖刺状固定锚，所述尖刺状固定锚的方向为远离所述回收部1的方向，进而能够起到避免所述腔静脉滤器的移位，并加强所述腔静脉滤器的定位能力。In addition, thesecond support plate 15 in this example is formed by bending a plurality ofstructural rods 1 to form a “U”-like open cage, that is, a semi-open cage structure. One end of thesecond support plate 15 is formed by the Thesecond thrombus filter 14 at the waist between thefirst support plate 13 and thesecond support plate 15 is formed by extending and bending, and the other end is sequentially connected to theend configuration 16. Similarly, thefirst support plate 15 in this example is It is preferable to set a small spike-shaped anchor that radiates outward away from the central axis of the vena cava filter. Displacement of the vena cava filter and enhancement of the positioning capability of the vena cava filter.

本例可以通过调整所述构造杆1的几何结构尺寸可调整所述腔静脉滤器的支撑力，如构造杆1的宽度、厚度、与血管壁3的贴合长度、弯曲的形状以及弯曲角度。通过分别调整第一支撑盘13和第二支撑盘15的直径尺寸，获得不同的支撑力，所述第一支撑盘13和第二支撑盘15也可以采用不同的直径，以适应血管的实际直径形状。In this example, the support force of the vena cava filter can be adjusted by adjusting the geometrical dimensions of thestructural rod 1 , such as the width, thickness, length of fitting with thevessel wall 3 , curved shape and curved angle of thestructural rod 1 . Different support forces can be obtained by adjusting the diameters of thefirst support plate 13 and thesecond support plate 15 respectively, and thefirst support plate 13 and thesecond support plate 15 can also adopt different diameters to suit the actual diameter of the blood vessel shape.

本例所述末端构型16的一端由所述第二支撑盘15延续相连，另一端呈游离，弯曲形成向轴线弯折弧或内卷，如图14所示，所述末端构型16延长构成辅助的血栓过滤网，有效拦截静脉血栓。如加强血栓过滤能力，除了增加构造杆1的数量外，构造杆1可以在第一血栓过滤网12处采用弯曲、绕“O”、“8”形、邻近或非邻近构造杆交错编织等形式，增加血栓过滤网的网格密度，进一步提高血栓捕捉效能。In this example, one end of theend configuration 16 is continuously connected by thesecond support plate 15 , and the other end is free, and is bent to form an arc or inward roll toward the axis. As shown in FIG. 14 , theend configuration 16 is extended It constitutes an auxiliary thrombus filter to effectively intercept venous thrombosis. To enhance the thrombus filtering capability, in addition to increasing the number ofstructural rods 1, thestructural rods 1 can be bent, around the "O", "8" shape, adjacent or non-adjacent structural rods at the firstthrombus filtering mesh 12. , increase the mesh density of the thrombus filter, and further improve the thrombus capture efficiency.

本例所述第二血栓过滤网14通过多根构造杆1空间交错形成具有拉伸变形和收敛成束性能的血栓过滤结构。即所述第二血栓过滤网14处的多条构造杆1空间交错，不能形成牢固稳定的交叉结构，具有拉伸变形、收敛成束性能，方便回收入鞘管性能。末端构型16本身有一定的捕捉血栓的能力，如延长汇集可以作为辅助的第三层血栓过滤层存在。因此该腔静脉滤器具有可以大范围调整的血栓过滤结构，配合实际临床需求。In this example, the secondthrombus filtering mesh 14 forms a thrombus filtering structure with tensile deformation and convergence and bunching properties by spatially interlacing a plurality ofstructural rods 1 . That is, the plurality ofstructural rods 1 at the secondthrombus filter screen 14 are interlaced in space, which cannot form a firm and stable cross structure, and has the properties of tensile deformation, convergence and bundling, and is convenient for recycling into the sheath. Theend configuration 16 itself has a certain ability to capture thrombus, for example, the extended collection can exist as an auxiliary third layer of thrombus filtering layer. Therefore, the vena cava filter has a thrombus filtering structure that can be adjusted in a wide range to meet actual clinical needs.

本例所述末端构型16相互自由游离，具有向轴线倾斜弯曲聚拢形状，有效避免滤器释放过程中，在离开输送鞘管端口瞬间，所述末端构型16因释放无鞘管约束，瞬间恢复记忆尺寸出现向外弹跳效应，容易刺伤血管壁。因此，本例所述末端构型16采用向轴线弯曲聚拢形状，释放瞬间接触血管向内弯曲的圆弧段，避免刺伤血管壁，如图14所示，本例所述末端构型16的一端与所述第二支撑盘15延续相连，所述末端构型16的另一端向轴线折弯、双折弯或内卷游离，这种弯曲形成向轴线弯折弧或内卷的末端构型16不同结构形状，均向轴线倾斜、变形和内拢，保证了血栓过滤的基础上，还能够有效避免自由末端构型对血管壁3刺伤等弊端。In this example, theend configurations 16 are free from each other, and have a shape that is inclined, curved and gathered toward the axis, which effectively prevents theend configuration 16 from being released without the restraint of the sheath and recovering instantly when the filter is released from the port of the delivery sheath. The memory size has an outward bouncing effect, which is easy to stab the blood vessel wall. Therefore, theend configuration 16 in this example adopts the shape of bending and gathering toward the axis, and releases the arc segment that instantly contacts the inward curved blood vessel, so as to avoid puncturing the blood vessel wall. As shown in FIG. 14 , theend configuration 16 in this example has One end is continuously connected with thesecond support plate 15, and the other end of theend configuration 16 is bent, double-bent or inwardly freed toward the axis, and this bending forms an end configuration that is bent toward the axis or inwardly coiled 16 Different structures and shapes are all inclined, deformed and closed inwardly toward the axis, which ensures that the thrombus can be filtered, and can effectively avoid the drawbacks such as stab wounds to thevessel wall 3 by the free end configuration.

实施例2：Example 2:

如图15和图16所示，在实施例1的基础上，本例对部分部件进行了结构上的优化设计，本例所述腔静脉滤器每一根构造杆1从回收部11向远端任意位置可分叉成2根或2根以上细的分支构造杆，形成单个或多个小的分叉形构造杆，在第一次形成接触血管壁3的第一支撑盘13前，从回收部11发出的构造杆1和分叉形成的分支小构造杆，相互交叉或编织形成菱形或圆形等网格结构，形成更有利于血栓过滤的第一血栓过滤网12，第一血栓过滤网12远离血管壁3，与血管壁3保持一定的距离，避免血栓内膜细胞爬附增殖到所述第一血栓过滤网12。As shown in FIGS. 15 and 16 , on the basis of Example 1, some components are optimized in structure in this example. Eachstructural rod 1 of the vena cava filter in this example extends from therecovery part 11 to the distal end. Any position can be bifurcated into 2 or more thin branched structural rods to form single or multiple small bifurcated structural rods, which are recovered from thefirst support plate 13 contacting theblood vessel wall 3 for the first time. Thestructural rod 1 emitted from thepart 11 and the branched small structural rod formed by the bifurcation cross each other or weave to form a grid structure such as a diamond or a circle, forming afirst thrombus filter 12 that is more conducive to thrombus filtering. 12 is far away from theblood vessel wall 3 and maintains a certain distance from theblood vessel wall 3 to prevent the thrombus intimal cells from crawling and proliferating to the firstthrombus filter screen 12 .

除第一血栓过滤网12可通过构造杆1形成稳定牢靠交叉、编织成血栓过滤网外，第二血栓过滤网14、第一支撑盘13、第二支撑盘15和末端构型16，保持相互自由游离状态，向轴线弯曲倾斜聚拢。在回收力的作用下，整体同步收敛成束，从血管壁中抽出，Except that the firstthrombus filter mesh 12 can be stably crossed and woven into a thrombus filter mesh through thestructural rod 1, the secondthrombus filter mesh 14, thefirst support disc 13, thesecond support disc 15 and theend configuration 16 keep each other In the free and free state, it bends and gathers toward the axis. Under the action of the recovery force, the whole synchronously converges into a bundle and is drawn out from the blood vessel wall,

同样的，本例所述腔静脉滤器由自回收部11上发出远离轴线的至少3根所述构造杆3，呈正反“S”或正反“3”形弯曲定型形成，在不同的位置形成大小不同、形状不同的区域段，形成不同的功能区段，如前述的支撑盘、血栓过滤网和末端构型16等。在本实施例中，第一血栓过滤网12还可由发自所述回收部11的主支121向外辐射，在适当位置出现至少有2个第一分支122和第二分支123，第一分支122和第二分支123汇集于第一支撑盘13的起始位置，由主支121第一分支122和第二分支123构成第一血栓过滤网12，密集的网格增加滤器的支撑力，增加所述腔静脉滤器的血栓过滤效果。本例所述第一血栓过滤网12的直径大小优选不超过所述第一支撑盘13的直径，通常小1~8mm，这样的设计效果最佳。Similarly, the vena cava filter in this example is formed by at least threestructural rods 3 emanating from therecovery part 11 away from the axis, bent and shaped in the shape of a positive and negative "S" or a positive and negative "3", at different positions Region segments with different sizes and shapes are formed to form different functional segments, such as the aforementioned support plate, thrombus filter mesh, and endconfiguration 16 and the like. In this embodiment, thefirst thrombus filter 12 can also be radiated outward from themain branch 121 sent from therecovery part 11 , and there are at least twofirst branches 122 andsecond branches 123 at appropriate positions. The first branch Thefirst branch 122 and thesecond branch 123 of themain branch 121 constitute the firstthrombus filter screen 12. The dense mesh increases the support force of the filter, increasing the The thrombus filtering effect of the vena cava filter. In this example, the diameter of the firstthrombus filter mesh 12 is preferably not larger than the diameter of thefirst support plate 13 , and is usually 1-8 mm smaller, and such a design has the best effect.

实施例3：Example 3:

如图17和图18所示，在实施例1的基础上，本例对部分部件进行了结构上的优化设计，与实施例1不同的是，本例从回收部11上发出远离其中轴线的构造杆1呈正或反“3”形态，分别围成两个第一血栓过滤网12、第一支撑盘13、第二血栓过滤网14、第二支撑盘15和末端构型16；所有构造杆1的末端构型16相互游离，向所述腔静脉滤器的中轴线内收聚拢。As shown in Fig. 17 and Fig. 18 , on the basis ofEmbodiment 1, the structure of some components is optimized in this embodiment. Different fromEmbodiment 1, this embodiment emits from therecovery part 11 away from the central axis. Thestructural rod 1 is in the form of a positive or reverse "3", and is respectively surrounded by two first thrombus filters 12, afirst support disc 13, asecond thrombus filter 14, asecond support disc 15 and anend configuration 16; all structural rods Thedistal configurations 16 of 1 are free from each other and converge toward the central axis of the vena cava filter.

本例所述第一血栓过滤网12由多条构造杆1在回收部11和第一支撑盘13弯曲形成圆锥曲面过滤网，其中包括多条构造杆汇集一端连接回收部，另一端辐射发散同第一支撑盘13顺滑延伸连接，每个构造杆1相互间隔，第一血栓过滤部13投影在垂直于轴线平面上呈“伞”骨架，形成过滤网格。所述末端构型16由第二支撑盘15延续弯曲形成，一端呈游离状，多条末端构型16可以形成一个辅助的第三血栓过滤网。In this example, the firstthrombus filter screen 12 is formed by bending a plurality ofstructural rods 1 at therecovery part 11 and thefirst support plate 13 to form a conical surface filter screen, which includes a plurality of structural rods that gather together at one end and connect to the recovery part, and the other end of which has the same radiation divergence. Thefirst support plate 13 is smoothly extended and connected, and eachstructural rod 1 is spaced apart from each other. The firstthrombus filtering part 13 is projected on a plane perpendicular to the axis to form an "umbrella" skeleton, forming a filtering grid. Theend configuration 16 is formed by the continuous bending of thesecond support plate 15, one end is free, and a plurality ofend configurations 16 can form an auxiliary third thrombus filtering net.

本例所述构造杆1采用正或反“3”形结构，这种结构能够更加便于所述新生内膜2增生组织在已经爬附所述腔静脉滤器情况下，利于构造杆1从内膜抽出，降低所述腔静脉滤器的回收阻力，极大地增加所述腔静脉滤器的可回收时间。In this example, theconstruction rod 1 adopts a positive or reverse "3" shape, which is more convenient for the proliferative tissue of theneointima 2 to climb the vena cava filter, and it is convenient for theconstruction rod 1 to remove the intima from the intima. Extraction reduces the recovery resistance of the vena cava filter and greatly increases the recovery time of the vena cava filter.

实施例4：Example 4:

如图19和图20所示，在实施例1的基础上，本例对部分部件进行了结构上的优化设计，本例从回收部11上发出远离其中轴线的构造杆1呈正或反“S”形态，分别围成两个第一血栓过滤网12、第一支撑盘13、第二血栓过滤网14、第二支撑盘15和末端构型16，所有构造杆1的末端构型16相互游离，向所述腔静脉滤器的中轴线内收聚拢。与实施例1不同的是，本例所述的构造杆1的中轴线与所述腔静脉滤器的中轴线之间设计存在预设偏转角度和预设距离，所述预设偏转角度可以根据实际需要进行自定义设计和调整，所述预设距离也可以根据实际需要进行自定义设计和调整，所述构造杆1的中轴线与所述腔静脉滤器的中轴线之间的预设偏转角度优选为5~45度之间，偏转方向为顺逆时针，这样的设计是在行业内没出现过的，经试验证明，可以有效提高所述腔静脉滤器对血管的自适应性。As shown in Figures 19 and 20, on the basis of Example 1, this example has carried out structural optimization design for some components. In this example, thestructural rod 1 that is away from the center axis from therecovery part 11 is forward or reverse "S" ” shape, respectively enclosing two first thrombus filters 12,first support discs 13, second thrombus filters 14,second support discs 15 andend configurations 16, theend configurations 16 of allstructural rods 1 are free from each other , and gathers in the central axis of the vena cava filter. Different fromEmbodiment 1, a preset deflection angle and a preset distance are designed between the central axis of thestructural rod 1 described in this example and the central axis of the vena cava filter, and the preset deflection angle can be determined according to the actual situation. Custom design and adjustment are required, and the preset distance can also be custom designed and adjusted according to actual needs. The preset deflection angle between the central axis of theconstruction rod 1 and the central axis of the vena cava filter is preferably It is between 5 and 45 degrees, and the deflection direction is clockwise and counterclockwise. Such a design has never appeared in the industry. Tests have proved that it can effectively improve the adaptability of the vena cava filter to blood vessels.

实施例5：Example 5:

如图21至图23所示，在实施例1的基础上，本例对部分部件进行了结构上的优化设计，本例从回收部11上发出分别弯曲围成两个第一血栓过滤网12、第一支撑盘13、第二血栓过滤网14、第二支撑盘15和末端构型16，所有构造杆1的末端构型16相互游离，向所述腔静脉滤器的中轴线内收聚拢。与实施例1不同的是，本例每条构形杆1从回收部11向远端任意位置至少分叉成2根分支进而组成分叉结构，形成小的构造杆，小的构造杆远端保持游离，如图21至图23所示所示，主支121自回收端发出，在适宜处分叉为至少两个第一分支122，甚至于每一个第一分支122可以进一步分叉为至少两个第二分支；本例采用多条多级分叉结构可以增加滤器捕捉血栓的能力，并有效提高了所述腔静脉滤器对血管的支撑力。As shown in FIGS. 21 to 23 , on the basis ofEmbodiment 1, some components are structurally optimized in this embodiment. In this embodiment, two first thrombus filter meshes 12 are respectively bent and bent from therecovery portion 11 in this embodiment. , thefirst support disc 13 , the secondthrombus filter mesh 14 , thesecond support disc 15 and theend configuration 16 , theend configurations 16 of all thestructural rods 1 are free from each other and converge toward the central axis of the vena cava filter. Different fromEmbodiment 1, in this example, eachconfiguration rod 1 bifurcates into at least two branches from therecovery portion 11 to any position at the distal end to form a bifurcated structure, forming a small configuration rod, the distal end of the small configuration rod. Remaining free, as shown in FIGS. 21 to 23 , themain branch 121 emanates from the recycling end and branches into at least twofirst branches 122 where appropriate, and even eachfirst branch 122 can be further branched into at least twofirst branches 122 Two second branches; the use of multiple multi-level bifurcation structures in this example can increase the ability of the filter to capture thrombus, and effectively improve the support force of the vena cava filter on the blood vessel.

综上所述，本例由至少3根构造杆1通过弯曲定型形成至少两个血栓过滤网、两个支撑盘以及一个末端构型16，进而形成一端约束汇聚，另一端半开放的笼状双盘的整体结构，将本例植入下腔静脉经可以有效避免器械倾斜，并输送导管到达目标位置，释放后根据其形状膨胀使得两个支撑盘由内向外压迫血管，血管形成两个凸起部位，血管对所述腔静脉滤器形成反向的压力，使得所述腔静脉滤器获得有效的固定力，通过本例的结构设计能够有效防止所述腔静脉滤器的歪斜、偏移和移位等问题，在结构上保证所述腔静脉滤器的轴线同目标血管的轴线一致重合，并有效提高了血栓过滤效果。To sum up, in this example, at least threestructural rods 1 are formed by bending and shaping to form at least two thrombus filter nets, two supporting discs and anend configuration 16, thereby forming a cage-shaped double-cage with one end constraining and converging, and the other end being semi-open. The overall structure of the disc, the implantation of this case into the inferior vena cava can effectively avoid the tilt of the instrument, and the delivery catheter can reach the target position. After release, it expands according to its shape so that the two support discs compress the blood vessel from the inside to the outside, and the blood vessel forms two bulges. The vena cava filter can get an effective fixation force by the blood vessels, and the blood vessels form a reverse pressure on the vena cava filter, so that the vena cava filter can obtain an effective fixing force. The structural design of this example can effectively prevent the vena cava filter from being skewed, offset and displaced. The problem is that the axis of the vena cava filter is guaranteed to coincide with the axis of the target blood vessel in structure, and the thrombus filtering effect is effectively improved.

在此基础上，本例还通过其优化的结构设计，使得所述腔静脉滤器能够针对目标血管的压力环境拥有了自适应能力，支撑盘得以依据血管壁的压力和血管变化的血压实现对支撑盘的大小和形状的调整，提高了所述腔静脉滤器的支撑适应能力，防止过大的支撑力对血管形成过度刺激或损伤，大幅度提高了产品的安全性能；并且，还能够有效延缓血管对所述腔静脉滤器的内皮化速度，有效延长了所述腔静脉滤器的安全植入时间，延长其安全回收时间窗。On this basis, through its optimized structural design, the vena cava filter has the ability to adapt to the pressure environment of the target blood vessel, and the support plate can support the blood vessel wall according to the pressure of the blood vessel wall and the blood pressure of the blood vessel. The adjustment of the size and shape of the disc improves the support adaptability of the vena cava filter, prevents excessive stimulation or damage to the blood vessels caused by excessive supporting force, and greatly improves the safety performance of the product; and can effectively delay the blood vessels. The endothelialization speed of the vena cava filter effectively prolongs the safe implantation time of the vena cava filter and prolongs the safe recovery time window.

以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本发明的保护范围。The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be considered that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deductions or substitutions can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (10)

Translated fromChinese

1.一种可回收的腔静脉滤器，其特征在于，包括：回收部和自所述回收部发出的至少3根构造杆，所述至少3根构造杆通过弯曲定型形成至少两个血栓过滤网、两个支撑盘以及一个末端构型，其中，一个血栓过滤网设置于所述回收部和一个支撑盘之间，另一个血栓过滤网设置于两个支撑盘之间的腰部，所述末端构型设置于另一个支撑盘远离所述血栓过滤网的一端，所述末端构型包括多个相互游离的末端，多个相互游离的末端向所述腔静脉滤器的中轴线倾斜弯曲聚拢。1. A recyclable vena cava filter, characterized in that it comprises: a recovery part and at least 3 structural rods issued from the recycling part, the at least 3 structural rods are formed by bending and shaping to form at least two thrombus filter nets , two support discs and an end configuration, wherein one thrombus filter is arranged between the recovery part and one support disc, and the other thrombus filter is arranged at the waist between the two support discs, and the end structure The type is arranged at one end of the other support disk away from the thrombus filter net, and the end configuration includes a plurality of mutually free ends, and the plurality of mutually free ends are inclined, bent and gathered toward the central axis of the vena cava filter.2.根据权利要求1所述的可回收的腔静脉滤器，其特征在于，每一根构造杆从所述回收部向远离所述回收部的方向分叉成至少2根分支，形成单级或多级分叉形构造杆，在第一次形成接触血管壁的支撑盘前，从回收部发出的构造杆和分叉形构造杆相互交叉或编织形成网格结构的血栓过滤网。2 . The retrievable vena cava filter according to claim 1 , wherein each structural rod is bifurcated into at least 2 branches from the reclaiming part to the direction away from the reclaiming part, forming a single-stage or For the multi-stage bifurcated structural rod, before the first formation of the support plate contacting the blood vessel wall, the structural rod and the bifurcated structural rod emitted from the recovery part intersect with each other or weave to form a grid-structured thrombus filter.3.根据权利要求1所述的可回收的腔静脉滤器，其特征在于，所述末端构型远离所述第二支撑盘的一端设置为过渡圆弧化末端，所述过渡圆弧化末端包括圆球状末端或水滴状末端；或，所述末端构型远离所述第二支撑盘的一端设置为过渡软化末端，所述过渡软化末端包括依次连接的过渡段和圆状末端，所述过渡段为逐渐变细或包括绕制弹簧的软化过渡段。3 . The retrievable vena cava filter of claim 1 , wherein the end of the end configuration away from the second support disc is configured as a transitional arcuate end, the transitional arcuate end comprising: 4 . a spherical end or a teardrop-shaped end; or, the end of the end configuration away from the second support plate is set as a transition softening end, and the transition softening end includes a transition segment and a round end connected in sequence, and the transition segment To taper or to include a soft transition of a wound spring.4.根据权利要求1所述的可回收的腔静脉滤器，其特征在于，所述回收部为包括对中伞、连接柱和内螺纹的自对中回收部，所述对中伞通过所述连接柱连接至所述第一血栓过滤网，其中，所述对中伞为底部开口的圆锥状构件，所述圆锥状构件的圆锥开口方向远离所述第一血栓过滤网，所述连接柱为一个圆柱体，所述内螺纹设置于所述连接柱内。4. The recyclable vena cava filter according to claim 1, wherein the recovery part is a self-centering recovery part comprising a centering umbrella, a connecting post and an internal thread, and the centering umbrella passes through the The connecting column is connected to the first thrombus filter, wherein the centering umbrella is a conical member with an opening at the bottom, and the conical opening of the conical member is away from the first thrombus filter, and the connecting column is A cylinder, the inner thread is arranged in the connecting column.5.根据权利要求1至4任意一项所述的可回收的腔静脉滤器，其特征在于，沿所述腔静脉滤器中轴线依序设置的回收部、第一血栓过滤网、第一支撑盘、第二血栓过滤网、第二支撑盘以及末端构型，其中，所述回收部的一端同第一血栓过滤网相连接，所述回收部的另一端为连接部；所述第一支撑盘的一端连接至所述第一血栓过滤网，所述第一支撑盘的另一端收口连接至所述第二血栓过滤网；所述第二支撑盘的一端收口连接至所述第二血栓过滤网，所述第二支撑盘的另一端开放连接至所述末端构型；所述第一血栓过滤网分布在所述回收部和第一支撑盘之间，所述第二血栓过滤网分布所述第一支撑盘和第二支撑盘之间的收口的腰部。5. The retrievable vena cava filter according to any one of claims 1 to 4, characterized in that a recovery part, a first thrombus filter net, and a first support plate are sequentially arranged along the central axis of the vena cava filter , the second thrombus filter, the second support plate and the end configuration, wherein, one end of the recovery part is connected with the first thrombus filter, and the other end of the recovery part is a connecting part; the first support plate One end of the second thrombus filter is connected to the first thrombus filter, the other end of the first support plate is connected to the second thrombus filter, and one end of the second support plate is connected to the second thrombus filter , the other end of the second support disc is openly connected to the end configuration; the first thrombus filter is distributed between the recovery portion and the first support disc, and the second thrombus filter is distributed over the A closed waist between the first support plate and the second support plate.6.根据权利要求5所述的可回收的腔静脉滤器，其特征在于，第一血栓过滤网由多根所述构造杆在所述回收部和第一支撑盘之间弯曲形成圆锥曲面过滤网，其中多根构造杆汇集的一端连接至所述回收部，另一端发散弯曲式连接至所述第一支撑盘并顺滑延伸连接，每根构造杆之间相互间隔，以形成弯曲伞骨状的过滤网格。6 . The retrievable vena cava filter according to claim 5 , wherein the first thrombus filter is formed by a plurality of the structural rods being bent between the recovery part and the first support plate to form a conical surface filter. 7 . , wherein one end of the plurality of structural rods is connected to the recovery part, and the other end is connected to the first support plate in a divergent and curved manner and is smoothly extended and connected, and each structural rod is spaced from each other to form a curved umbrella-shaped filter grid.7.根据权利要求5所述的可回收的腔静脉滤器，其特征在于，所述第一支撑盘为类圆柱笼体，所述第一支撑盘和/或第二支撑盘上设置远离所述腔静脉滤器中心轴并向外辐射的尖刺状固定锚，所述尖刺状固定锚的向外辐射方向为远离所述回收部的方向。7. The recyclable vena cava filter according to claim 5, wherein the first support plate is a cylindrical cage, and the first support plate and/or the second support plate are arranged away from the The central axis of the vena cava filter is a spike-shaped fixation anchor that radiates outward, and the outward radial direction of the spike-shaped fixation anchor is a direction away from the recovery part.8.根据权利要求5所述的可回收的腔静脉滤器，其特征在于，所述第二血栓过滤网由多根构造杆绕所述腔静脉滤器的中心轴并偏离预设距离的轴线，在所述第一支撑盘和第二支撑盘之间弯曲形成空间交错过滤网格。8 . The retrievable vena cava filter according to claim 5 , wherein the second thrombus filter is composed of a plurality of structural rods around the central axis of the vena cava filter and is offset from the axis of a preset distance, and the The first support plate and the second support plate are curved to form a spatially interlaced filter grid.9.根据权利要求5所述的可回收的腔静脉滤器，其特征在于，所述第二血栓过滤网通过多根构造杆空间交错形成具有拉伸变形和收敛成束性能的血栓过滤结构。9 . The retrievable vena cava filter according to claim 5 , wherein the second thrombus filtering mesh forms a thrombus filtering structure with tensile deformation and convergence and bunching properties by spatially interlacing a plurality of structural rods. 10 .10.根据权利要求5所述的可回收的腔静脉滤器，其特征在于，所述末端构型的一端与所述第二支撑盘延续相连，所述末端构型的另一端向轴线折弯、双折弯或内卷游离。10. The retrievable vena cava filter according to claim 5, wherein one end of the end configuration is continuously connected to the second support plate, and the other end of the end configuration is bent toward the axis, Double bend or involute free.

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