技术领域technical field
本实用新型属于医疗器械技术领域，涉及一种过滤器，尤其涉及一种用于术中脱落的斑块或者血栓过滤的血栓过滤器。The utility model belongs to the technical field of medical instruments and relates to a filter, in particular to a thrombus filter used for filtering plaques or thrombus falling off during operation.
背景技术Background technique
随着血管腔内介入治疗在世界范围内的广泛应用，其并发症也日益显现。如在球囊扩张术、动脉内膜剥离术、血管旋切术或支架植入手术过程中，血凝块或者钙化的斑块破碎和脱落，并产生血栓，随着血流的方向进入远端血管，阻塞重要脏器的血液供应，例如脑、心脏或者其他重要器官。这种栓塞可能导致脑梗塞、心肌梗塞、肺栓塞等，严重可导致死亡。以介入主动脉瓣膜置换手术为例，由于主动脉瓣严重狭窄钙化，一般采用球囊预先对原钙化狭窄瓣膜进行扩张，在此过程中，会有部分钙化的斑块在扩张过程中脱落，随着血液流动可能进入冠脉、脑部及下肢等血管，导致血管栓塞，最终导致病人死亡或者瘫痪。With the wide application of endovascular interventional therapy in the world, its complications are becoming more and more obvious. For example, during balloon dilatation, arterial endarterectomy, vascular atherectomy or stent implantation, blood clots or calcified plaques are broken and detached, and thrombus is generated, which enters the distal end along the direction of blood flow Blood vessels that block the blood supply to vital organs, such as the brain, heart, or other vital organs. This embolism may lead to cerebral infarction, myocardial infarction, pulmonary embolism, etc., and may lead to death in severe cases. Taking interventional aortic valve replacement surgery as an example, due to severe stenosis and calcification of the aortic valve, balloons are generally used to expand the original calcified stenotic valve in advance. The blood flow may enter the coronary arteries, brain and lower extremities and other blood vessels, resulting in vascular embolism, eventually leading to death or paralysis of the patient.
现有技术中，一般采用远端保护器来过滤并收集手术过程中脱落的斑块、血栓等栓子。在手术前，先将远端保护器械送至距离操作者的的远端，工作器械在距离操作者的近端进行操作，当手术中有斑块脱落或者血栓形成时，远端保护器过滤并收集血栓，避免其阻塞血管。远端保护器均由普通导引导丝改进而成，大致分为两类，一类是球囊封堵器械，在手术过程中，张开球囊，能有效的阻止固体颗粒流走，但是在阻止固体颗粒流走的同时，也阻断了血流，影响的远端组织的血供，若手术时间较长，会造成远端细胞缺血坏死，另一类是伞状过滤器，在经导管主动脉置换手术中分别在头臂干和左颈总动脉下植入一个远端保护器，用于保护脑部，但是这种方案仅能部分的保护下游分支血管。其结构为在一根导丝或者导管连接一个伞状过滤器，比如在主动脉瓣球囊扩张手术过程中，这种器械仅保护颈动脉，或者头臂干动脉，固体颗粒仍然可能顺着主动脉至下肢细小的分支血管，仍然存在风险，为避免该问题，则需要在其下游各个分支血管预置一个远端保护器，这样增加了手术时间，增加了病人的负担。由于这种伞状过滤器的放置位置均处于操作者的远端，工作器械处于操作者的近端，当在正式对病变位置进行手术干预时，相同路径的血管内需要并存多个导管，相互之间可能产生干涉，从而影响手术和远端保护效果。In the prior art, a distal protector is generally used to filter and collect emboli such as plaque and thrombus that fall off during the operation. Before the operation, the distal protection device is sent to the far end of the operator, and the working instrument is operated at the proximal end of the operator. When plaque falls off or thrombus forms during the operation, the distal protector filters and Collect the thrombus so it does not block the blood vessel. The distal protectors are all improved from ordinary guide wires, and can be roughly divided into two categories. One is the balloon occlusion device. During the operation, the balloon is opened to effectively prevent the solid particles from flowing away, but it prevents solid particles from flowing away. When the particles flow away, the blood flow is also blocked, which affects the blood supply of the distal tissue. If the operation takes a long time, it will cause ischemia and necrosis of the distal cells. In arterial replacement surgery, a distal protector is implanted under the brachiocephalic trunk and the left common carotid artery to protect the brain, but this solution can only partially protect the downstream branch vessels. Its structure is to connect an umbrella filter to a guide wire or catheter. For example, in the process of aortic valve balloon dilatation, this device only protects the carotid artery or the brachiocephalic artery, and solid particles may still flow along the aortic valve. There are still risks in the small branch vessels from the artery to the lower limbs. In order to avoid this problem, it is necessary to preset a distal protector in each downstream branch vessel, which increases the operation time and increases the burden on the patient. Since the umbrella-shaped filter is placed at the far end of the operator, and the working instruments are at the proximal end of the operator, when formally performing surgical intervention on the lesion, multiple catheters need to coexist in the blood vessels of the same path. There may be interference between them, which will affect the effect of surgery and distal protection.
为了解决上述问题，研究人员还研发了一种带保护器的经皮主动脉支架或主动脉瓣膜支架系统，将滤网型的保护器从支架输送鞘管输送到指定位置，展开保护器，滤网型保护器开口朝向鞘管，然后再进行支架植入的操作步骤，并通过拉线拉动将滤网回收保护器，该保护器的是将滤网放置在主动脉弓部的三根血管的开口处，阻止血栓进入颈动脉，在一定程度上可以避免血栓进入脑部的血管，保护脑部血管不被栓塞，但该保护器开口朝向鞘管，不能捕获栓子，并将其带出体外，同时也不能保护下肢血管。In order to solve the above problems, researchers have also developed a percutaneous aortic stent or aortic valve stent system with a protector. The filter-type protector is delivered from the stent delivery sheath to the designated position, and the protector is deployed. The opening of the mesh protector faces the sheath tube, and then the stent implantation step is performed, and the filter mesh is pulled back to the protector by pulling the wire. The thrombus entering the carotid artery can prevent the thrombus from entering the blood vessels of the brain to a certain extent and protect the brain blood vessels from being embolized. Protect lower extremity blood vessels.
还有一种是采用防溢伞和血栓拦截网配合的方式，防溢伞和血栓拦截网相互套装在一起，防溢伞被血栓拦截网撑开后可以过滤血管中血栓，血栓拦截网退回防溢伞内后，防溢伞的伞口将向中心合拢，关闭拦截口形成口袋，以防止斑块或栓子的溢出，向前推鞘管回收血栓。该方案中，血栓拦截网在主动脉内展开，可以拦截脱落的斑块或者栓子，保护下游分支血管，同时采用防溢伞防止斑块或栓子在回收过程中外泄，但是该装置也存在以下缺点：第一，该方案中，防溢伞自然状态处于收口状态，需要血栓拦截网的弹力将其在血管内展开，在捕获斑块或者栓子后，防溢伞依靠自身的回复力来合拢伞面开口，此合拢力太小，在回收血栓的过程中，依然存在斑块或者栓子外泄的风险，若外泄的血栓堵塞病人的重要器官，将带来严重的后果；第二，在狭窄的血管管腔内，由于防溢伞是金属网状结构，在轴向具有较大的自由度，血栓拦截网在防溢伞内伸出和回撤的过程中，存在造成防溢伞非预期变形而造成两者卡住，致使防溢伞难以回撤，将不得不转移至外科解决；第三，该器械采用多层的设计，外径较太大，头端较硬，在弯曲的血管内展开贴壁性不好，同时防溢伞和血栓拦截网分别需要一个推送杆，这样整个器械的刚性较大，使用过程中两者相对运动，操作起来也比较困难。Another method is to use the combination of the anti-overflow umbrella and the thrombus interception net. The anti-overflow umbrella and the thrombus interception net are set together. After the anti-overflow umbrella is stretched by the thrombus interception net, it can filter the thrombus in the blood vessel, and the thrombus interception net returns to the anti-overflow After the umbrella is inside, the mouth of the anti-overflow umbrella will be closed towards the center, and the interception mouth will be closed to form a pocket to prevent plaque or emboli from overflowing, and the sheath tube will be pushed forward to recover the thrombus. In this scheme, the thrombus interception net is deployed in the aorta, which can intercept the fallen plaque or emboli and protect the downstream branch vessels. The following disadvantages: First, in this scheme, the anti-overflow umbrella is in a closed state in a natural state, and the elasticity of the thrombus interception net is required to expand it in the blood vessel. After catching plaque or emboli, the anti-overflow umbrella relies on its own resilience to recover Closing the opening of the umbrella cover, the closing force is too small, and there is still a risk of plaque or emboli leaking during the process of recovering the thrombus. If the leaked thrombus blocks the vital organs of the patient, it will bring serious consequences; the second , in the narrow blood vessel lumen, because the anti-overflow umbrella is a metal mesh structure, it has a large degree of freedom in the axial direction. During the process of extending and withdrawing the thrombus interception net in the anti-overflow umbrella, there is a problem of anti-overflow Unexpected deformation of the umbrella caused the two to get stuck, making it difficult to retract the overflow-proof umbrella, and it would have to be transferred to surgery for resolution; The wall-adherence of the curved blood vessel is not good. At the same time, the anti-overflow umbrella and the thrombus interception net need a push rod respectively, so the rigidity of the whole device is relatively high, and the relative movement of the two during use is difficult to operate.
实用新型内容Utility model content
本实用新型要解决的技术问题在于，针对现有技术中的上述缺陷，提供一种能有效拦截血管脱落的斑块或者栓子、结构简单、推送阻力小、操作顺畅的血栓过滤器，该过滤器可以减少手术时间，有利于降低病人负担和手术并发症。The technical problem to be solved by the utility model is to provide a thrombus filter that can effectively intercept plaques or emboli that fall off blood vessels, has a simple structure, small push resistance, and smooth operation in view of the above-mentioned defects in the prior art. The device can reduce the operation time, which is beneficial to reduce the burden on patients and surgical complications.
本实用新型解决其技术问题所采用的技术方案是：一种血栓过滤器，包括手柄、用于捕捉血栓的过滤伞、推送导管、用于对过滤伞收缩合拢的合拢装置；The technical solution adopted by the utility model to solve the technical problem is: a thrombus filter, including a handle, a filter umbrella for catching thrombus, a push catheter, and a closing device for shrinking and closing the filter umbrella;
所述过滤伞为网状的可弹性复原的漏斗形结构，过滤伞的颈部与推送导管固定连接，所述推送导管沿轴向设有内腔，所述过滤伞围蔽的空腔与推送导管的内腔联通；The filter umbrella is a reticular elastically recoverable funnel-shaped structure. The neck of the filter umbrella is fixedly connected to the push conduit. The push conduit is provided with an inner cavity along the axial direction. The lumen of the catheter is communicated;
所述合拢装置包括收线、用于牵引收线动作的牵引机构；所述收线与过滤伞的开口部连接并牵拉该开口部合拢使得过滤伞成为封闭空间；所述牵引机构穿装在所述推送导管的内腔中并向过滤伞开口部延伸与所述收线连接；The closing device includes a take-up line and a traction mechanism for pulling the line; the take-up line is connected to the opening of the filter umbrella and pulled to close the opening so that the filter umbrella becomes a closed space; the traction mechanism is worn on the In the lumen of the push catheter and extending to the opening of the filter umbrella, it is connected with the take-up wire;
所述推送导管、牵引机构分别与手柄连接，通过手柄操作推送导管和牵引机构的动作。The pushing catheter and the pulling mechanism are respectively connected with the handle, and the action of the pushing catheter and the pulling mechanism is operated through the handle.
所述的血栓过滤器中，优选自由状态下，所述过滤伞的开口部向外扩展以贴合血管内壁。In the above thrombus filter, preferably in a free state, the opening of the filter umbrella expands outwards to adhere to the inner wall of the blood vessel.
所述的血栓过滤器中，优选自由状态下，所述过滤伞的开口部为与血管内In the above thrombus filter, preferably in a free state, the opening of the filter umbrella is in contact with the blood vessel
壁贴合筒状结构。The wall fits the cylindrical structure.
所述的血栓过滤器中，优选所述过滤伞为形状记忆材料或高弹性材料通过编织或切割制成的网状结构。In the above thrombus filter, preferably, the filter umbrella is a mesh structure made of shape memory material or high elastic material by weaving or cutting.
所述的血栓过滤器中，优选所述收线分散设置至少两根，至少两根的收线的一端各自分散固定在过滤伞的开口部，另一端汇集与牵引机构固定连接；或者所述收线设置一根，所述收线顺次穿装在过滤伞的开口部至少一周，与牵引机构固定连接。In the thrombus filter, it is preferred that at least two of the receiving wires are dispersedly arranged, and one end of the at least two receiving wires is respectively dispersed and fixed at the opening of the filter umbrella, and the other ends are collected and fixedly connected to the traction mechanism; or the receiving wires One line is provided, and the take-up line is sequentially passed through the opening of the filter umbrella for at least one week, and is fixedly connected with the traction mechanism.
所述的血栓过滤器中，优选所述推送导管沿轴向设置一个贯通推送导管两端的内腔，所述牵引机构的外径小于推送导管内腔直径，使得牵引机构与推送导管内腔之间留有容置介入器械的空间；In the above thrombus filter, preferably, the pushing catheter is provided with an inner cavity passing through both ends of the pushing catheter along the axial direction, and the outer diameter of the pulling mechanism is smaller than the diameter of the inner cavity of the pushing catheter, so that the distance between the pulling mechanism and the inner cavity of the pushing catheter is Reserve a space for accommodating interventional devices;
或者所述推送导管沿轴向至少设置两个贯通推送导管两端的内腔，所述内腔包括隔开的主腔和侧腔，且所有主腔和侧腔中分别各自穿装的容置物互不干扰。Or the push catheter is provided with at least two inner cavities penetrating through the two ends of the push catheter in the axial direction, the inner cavities include a separated main cavity and side cavities, and the contents of all the main cavities and side cavities are connected to each other. Do not interfere.
所述的血栓过滤器中，优选所述牵引机构穿装所述侧腔中，并从过滤伞颈部的空腔向过滤伞的开口部延伸与收线固定连接。In the thrombus filter, preferably, the traction mechanism is installed in the side cavity, and extends from the cavity of the filter umbrella neck to the opening of the filter umbrella, and is fixedly connected with the take-up wire.
所述的血栓过滤器中，优选所述牵引机构包括与收线端部固定连接的牵引件、用于穿装牵引件的支撑导管，所述支撑导管穿装在所述推送导管的内腔中，所述牵引件和支撑导管分别连接手柄。In the thrombus filter, preferably, the traction mechanism includes a traction piece fixedly connected to the end of the take-up line, a support catheter for wearing the traction piece, and the support catheter is threaded into the lumen of the push catheter , the traction member and the support conduit are respectively connected to the handle.
所述的血栓过滤器中，优选所述收线与牵引件为连续的一体结构，所述收线的一端与过滤伞的开口部固定连接，牵引件与手柄固定连接。In the thrombus filter, preferably, the take-up wire and the pulling member are in a continuous integral structure, one end of the take-up wire is fixedly connected to the opening of the filter umbrella, and the puller is fixedly connected to the handle.
所述的血栓过滤器中，优选所述牵引机构包括穿装在推送导管内腔中的杆状或管状的牵引件，所述牵引件一端与收线固定连接、另一端固定连接手柄。In the aforementioned thrombus filter, preferably, the traction mechanism includes a rod-shaped or tubular traction piece installed in the lumen of the pushing catheter, one end of the traction piece is fixedly connected to the take-up wire, and the other end is fixedly connected to the handle.
本实用新型的血栓过滤器采用过滤伞、推送导管、合拢装置等结构，在过滤伞张开并拦截栓子的同时，推送导管的内腔可作为其他介入器械的输送通道，其他器械可以通过该通道输送至距离操作者的更远的位置进行工作；选择直径略大于血管直径的过滤伞，过滤伞为漏斗形，在血管内展开后，过滤伞的开口部抵住血管内壁，就可以保持良好的贴壁性，防止与血管管壁形成夹角或空隙，过滤伞的网状结构既能允许血流通过，保证血供，又能完全的捕获来自于病变位置的脱落的斑块或者栓子，对下游血管或者远端分支血管进行充分的保护；同时在回收过滤器和血栓之前，先使用合拢装置将过滤伞开口合拢并收紧，这样脱落的斑块或者栓子牢固地包裹在过滤伞内，避免由于回收过程中输送鞘管对过滤伞的挤压将栓子挤出过滤器。过滤伞由最小直径的颈部先进入输送鞘管，其余部分顺应进入输送鞘管，不易出现过滤伞被卡住，造成回收不畅的问题。相比现有技术方案，本实用新型既可以提供脱落的斑块或者栓子捕获的效率，又能有效地防止脱落的斑块或者栓子在回收过程中外泄，过滤器更加可靠，稳定。The thrombus filter of the utility model adopts structures such as a filter umbrella, a push catheter, and a closing device. When the filter umbrella is opened and intercepts emboli, the inner cavity of the push catheter can be used as a delivery channel for other interventional instruments, and other instruments can pass through the thrombus filter. The channel is delivered to a position farther away from the operator for work; choose a filter umbrella with a diameter slightly larger than the diameter of the blood vessel, the filter umbrella is funnel-shaped, and after being deployed in the blood vessel, the opening of the filter umbrella can be kept in good condition Adherence to the wall prevents the formation of angles or gaps with the vessel wall. The mesh structure of the filter umbrella can not only allow blood to pass through, ensure blood supply, but also completely capture the exfoliated plaque or emboli from the lesion. , to fully protect the downstream blood vessels or distal branch blood vessels; at the same time, before recycling the filter and thrombus, use the closing device to close and tighten the opening of the filter umbrella, so that the shed plaque or embolus is firmly wrapped in the filter umbrella In order to avoid the extrusion of emboli from the filter due to the extrusion of the delivery sheath on the filter umbrella during retrieval. The filter umbrella enters the delivery sheath from the neck with the smallest diameter first, and the rest enters the delivery sheath along with it. It is not easy for the filter umbrella to get stuck and cause poor recovery. Compared with the prior art solutions, the utility model can not only improve the capture efficiency of the shed plaques or emboli, but also effectively prevent the shed plaques or emboli from leaking during the recovery process, and the filter is more reliable and stable.
本实用新型的血栓过滤器仅采用了单层网状的过滤伞和单根推送导管，相比现有技术方案，本方案防可以有效地降低器械卡死的风险，同时结构简单，降低了整个过滤器的刚性，提高过滤器系统的柔顺性，这样推送阻力小，操作顺畅，可以减少手术时间，有利于降低病人负担和手术并发症。The thrombus filter of the utility model only adopts a single-layer mesh filter umbrella and a single push catheter. Compared with the existing technical solutions, this solution can effectively reduce the risk of device jamming, and at the same time, the structure is simple, reducing the overall The rigidity of the filter improves the flexibility of the filter system, so that the push resistance is small and the operation is smooth, which can reduce the operation time and help reduce the patient's burden and surgical complications.
附图说明Description of drawings
下面将结合附图及实施例对本实用新型作进一步说明，附图中：The utility model will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:
图1是本实用新型实施例1的结构示意图；Fig. 1 is the structural representation of the utility model embodiment 1;
图1a是本实用新型实施例1的推送导管、支撑导管、牵引件装配后横截面的示意图；Fig. 1a is a schematic diagram of the assembled cross-section of the pushing catheter, the supporting catheter and the traction member in Embodiment 1 of the present invention;
图2是本实用新型实施例1主动脉预置血栓过滤器的位置示意图；Fig. 2 is a schematic diagram of the location of the aortic pre-embedded thrombus filter in Embodiment 1 of the present utility model;
图3是本实用新型实施例1主动脉瓣球囊扩张并捕获栓子的示意图；Fig. 3 is a schematic diagram of expanding the aortic valve balloon and capturing emboli in Embodiment 1 of the present invention;
图4是本实用新型实施例1血栓过滤器合拢后的结构示意图；Fig. 4 is a schematic structural view of the closed thrombus filter in Embodiment 1 of the present invention;
图5是本实用新型实施例1血栓过滤器回撤至输送鞘管的结构示意图；Fig. 5 is a schematic structural view of the withdrawal of the thrombus filter to the delivery sheath in Example 1 of the present utility model;
图6a是本实用新型实施例2血栓过滤器展开状态的一种结构示意图；Fig. 6a is a schematic structural view of the expanded state of the thrombus filter in Embodiment 2 of the present utility model;
图6b是本实用新型实施例2血栓过滤器展开状态的另一种结构示意图；Fig. 6b is another structural schematic diagram of the expanded state of the thrombus filter in Embodiment 2 of the present utility model;
图7是本实用新型实施例2血栓过滤器合拢状态的结构示意图；Fig. 7 is a schematic structural view of the closing state of the thrombus filter in Embodiment 2 of the present utility model;
图8是本实用新型实施例3的结构示意图；Fig. 8 is the structural representation of the utility model embodiment 3;
图9是图8中I处的局部放大图。Fig. 9 is a partial enlarged view of position I in Fig. 8 .
具体实施方式detailed description
为了对本实用新型的技术特征、目的和效果有更加清楚的理解，现对照附图详细说明本实用新型的具体实施方式。In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation of the utility model is described in detail with reference to the accompanying drawings.
方位定义：按照过滤器的结构进行定义，推送导管所在的方位为后，过滤伞所在的方位为前。Orientation definition: Defined according to the structure of the filter, the orientation where the push tube is located is the rear, and the orientation where the filter umbrella is located is the front.
实施例1，本实施例为一种基础的实施方式。Embodiment 1, this embodiment is a basic implementation manner.
如图1-5所示，一种血栓过滤器，包括手柄(图中未示出)、用于捕捉血栓的过滤伞1100、推送导管1200、用于对过滤伞1100收缩合拢的合拢装置；所述过滤伞1100为网状的可弹性复原的漏斗形结构，过滤伞1100的颈部1110与推送导管1200固定连接，所述推送导管1200沿轴向设有内腔，过滤伞1100围蔽的空腔与推送导管1200的内腔联通；所述合拢装置包括牵拉过滤伞1100合拢成封闭空间的收线2100、用于牵引收线2100动作的牵引机构；所述收线2100与过滤伞1100的开口部1120连接并牵拉该开口部1120合拢使得过滤伞1100成为封闭空间；所述牵引机构穿装在所述推送导管1200的内腔中并向过滤伞1100开口部1120延伸与所述收线2100连接，所述推送导管1200、牵引机构分别与手柄连接，通过手柄操作推送导管1200和牵引机构的动作。As shown in Figures 1-5, a thrombus filter includes a handle (not shown), a filter umbrella 1100 for catching thrombus, a push catheter 1200, and a closing device for shrinking and closing the filter umbrella 1100; The filter umbrella 1100 is a reticular elastically recoverable funnel-shaped structure, the neck 1110 of the filter umbrella 1100 is fixedly connected with the push conduit 1200, and the push conduit 1200 is provided with an inner cavity along the axial direction, and the space enclosed by the filter umbrella 1100 The lumen communicates with the inner cavity of the push catheter 1200; the closing device includes a take-up line 2100 that pulls the filter umbrella 1100 to close up into a closed space, and a traction mechanism for pulling the take-up line 2100; The opening 1120 is connected and pulled to close the opening 1120 so that the filter umbrella 1100 becomes a closed space; the traction mechanism is installed in the inner cavity of the push catheter 1200 and extends to the opening 1120 of the filter umbrella 1100 and the take-up wire 2100, the push catheter 1200 and the traction mechanism are respectively connected to the handle, and the action of the push catheter 1200 and the traction mechanism is operated through the handle.
过滤伞1100为血栓过滤器中用于捕捉血栓的部件，其主体形状为漏斗形，过滤伞1100可以为如图1所示的轴对称形状的漏斗形，也可以是如图6所示的非轴对称的漏斗形，优选自由状态下，过滤伞1100的横截面为圆形，也可以为椭圆形，需与血管内壁完全贴合，在过滤伞1100和血管内壁之间没有间隙。如图1所示，过滤伞1100依次包括三部分：与推送导管1200固定连接的过滤伞1100的颈部1110、锥形部1130、过滤伞的开口部1120，开口部1120位于前部用于捕捉血栓或斑块，过滤伞颈部1110位于后部用于与推送导管1200联通并固定连接在一起，过滤伞1100开口部1120有较大开口，且开口部1120具有一定长度，便于贴附血管内壁。The filter umbrella 1100 is a part used to catch thrombus in the thrombus filter, and its main body is in the shape of a funnel. The filter umbrella 1100 can be a funnel-shaped axisymmetric shape as shown in FIG. Axisymmetric funnel-shaped, preferably in a free state, the cross-section of the filter umbrella 1100 is circular or elliptical, and it needs to be completely attached to the inner wall of the blood vessel, and there is no gap between the filter umbrella 1100 and the inner wall of the blood vessel. As shown in Figure 1, the filter umbrella 1100 comprises three parts in turn: the neck 1110 of the filter umbrella 1100 fixedly connected with the push conduit 1200, the tapered part 1130, the opening 1120 of the filter umbrella, the opening 1120 is located at the front for catching For thrombus or plaque, the filter umbrella neck 1110 is located at the rear for communicating with the push catheter 1200 and fixedly connected together. The opening 1120 of the filter umbrella 1100 has a larger opening, and the opening 1120 has a certain length, which is convenient for attaching to the inner wall of the blood vessel .
为了更好贴附血管内壁，所述的血栓过滤器中，优选自由状态下，所述过滤伞1100的开口部1120向外扩展并在血管的约束下贴合血管内壁，开口部1120向外扩展的结构是指从后向前，开口部1120的直径逐步增大，开口部1120的结构有多种，例如：开口部1120为后小前大的锥台状、弧面体结构等，开口部1120的前端抵住血管内壁，防止与血管管壁之间存在间隙或形成夹角，能完全地捕获来自于病变位置脱落的斑块或者栓子。另一种更优选的方案是：在自由状态下，所述过滤伞1100的开口部1120为与血管内壁贴合圆筒状结构，圆筒结构与血管内壁配合，且具有一定长度，则过滤伞1100就可以保持良好的贴壁性，并且一段长度的过滤伞1100与血管内壁贴合，可以更好保护血管，防止过滤伞1100开口部1120的前端面与血管壁接触面积小，对血管壁面造成损伤，并且圆筒状结构能更好顺应血管，保证顺畅推送到预定位置。同时为了能使得过滤伞1100有更好的贴壁性，可以选择开口部1120的端面开口直径稍大于该处血管内径的过滤伞，过滤伞1100受到血管约束变形贴附在内壁上。In order to better adhere to the inner wall of the blood vessel, in the thrombus filter, preferably in a free state, the opening 1120 of the filter umbrella 1100 expands outwards and adheres to the inner wall of the blood vessel under the constraint of the blood vessel, and the opening 1120 expands outwards The structure means that from the back to the front, the diameter of the opening 1120 gradually increases. There are various structures of the opening 1120. The front end is against the inner wall of the blood vessel to prevent gaps or angles between it and the blood vessel wall, and can completely capture plaque or emboli that come off from the lesion. Another more preferred solution is: in a free state, the opening 1120 of the filter umbrella 1100 is a cylindrical structure that fits with the inner wall of the blood vessel, and the cylindrical structure fits with the inner wall of the blood vessel and has a certain length. 1100 can maintain good wall-adherence, and a length of filter umbrella 1100 fits with the inner wall of the blood vessel, which can better protect the blood vessel and prevent the front end of the opening 1120 of the filter umbrella 1100 from having a small contact area with the blood vessel wall, causing damage to the blood vessel wall. damage, and the cylindrical structure can better conform to the blood vessels, ensuring smooth push to the predetermined position. At the same time, in order to make the filter umbrella 1100 have better adhesion to the wall, you can choose a filter umbrella whose end face opening diameter of the opening 1120 is slightly larger than the inner diameter of the blood vessel, and the filter umbrella 1100 is deformed and attached to the inner wall due to the constraints of the blood vessel.
过滤伞1100开口部1120的前端面优选为闭合的环状结构，过滤伞1100推送中抵压血管内壁，如果过滤伞1100开口部1120前端面为尖锐结构，就很容易对血管壁造成损伤，因此选用闭合环状结构，闭合环状结构圆滑过渡，无尖锐，减少对血管内壁损伤。并且过滤伞1100开口部1120的前端面可以选择如图1所示的在同一平面内且与推送导管1200的轴向垂直，使得在推进过程中减少阻力、减少血管损伤。过滤伞1100开口部1120的前端面还可以选择如图6b所示的斜面结构。The front end surface of the opening 1120 of the filter umbrella 1100 is preferably a closed ring structure, and the filter umbrella 1100 pushes against the inner wall of the blood vessel. If the front end surface of the opening 1120 of the filter umbrella 1100 is a sharp structure, it is easy to cause damage to the blood vessel wall. The closed ring structure is selected, and the closed ring structure has a smooth transition without sharp points, which reduces damage to the inner wall of the blood vessel. Moreover, the front end surface of the opening 1120 of the filter umbrella 1100 can be chosen to be in the same plane as shown in FIG. 1 and perpendicular to the axial direction of the pushing catheter 1200, so as to reduce resistance and reduce blood vessel damage during the pushing process. The front end surface of the opening 1120 of the filter umbrella 1100 can also choose a slope structure as shown in FIG. 6b.
所述过滤伞1100为形状记忆材料或高弹性材料通过编织或切割制成的网状结构，在形状记忆材料或高弹性材料编织后，或者采用记忆合金管切割成网状漏斗形后，再通过模具热定型而成，制成的过滤伞1100可弹性复原。本实施例中过滤伞1100采用镍钛记忆合金丝闭环编织，采用0.10-0.80mm镍钛合金丝经闭环编织后，模具400～600℃热定型而成。网状的过滤伞1100的网孔大小的选择可以根据实际患者血管中血栓尺寸决定，选择时网孔最大不超过预期捕获栓子的尺寸，同时过滤伞1100直径的选择原则为：开口最大外径应略大于靶向血管的内径。过滤伞1100的可弹性复原是指：自由状态下，过滤伞1100为漏斗状，合拢后过滤伞1100为橄榄形，且过滤伞1100开口合拢并收紧汇集至一点；放松收线，过滤伞1100可弹性恢复成自由状态下的漏斗状。The filter umbrella 1100 is a mesh structure formed by weaving or cutting shape memory materials or high elastic materials. The mold is heat-set, and the filter umbrella 1100 can be elastically restored. In this embodiment, the filter umbrella 1100 is braided with nickel-titanium memory alloy wire in a closed loop, and the mold is heat-set at 400-600° C. after the closed-loop weaving with 0.10-0.80 mm nickel-titanium alloy wire. The mesh size of the mesh filter umbrella 1100 can be selected according to the size of the thrombus in the actual patient's blood vessel. When selecting, the maximum mesh size should not exceed the size expected to capture the emboli. At the same time, the selection principle for the diameter of the filter umbrella 1100 is: the maximum outer diameter of the opening Should be slightly larger than the inner diameter of the target vessel. The elastic recovery of the filter umbrella 1100 means: in the free state, the filter umbrella 1100 is funnel-shaped, and the filter umbrella 1100 is olive-shaped after being closed, and the opening of the filter umbrella 1100 is closed and tightened to one point; when the thread is loosened, the filter umbrella 1100 It can be elastically restored to a funnel shape in a free state.
为了能观察血栓过滤器在血管内的位置，过滤伞1100上设置有荧光显影点(图中未示出)，使过滤伞1100在荧光透视设备下具有可识别性。荧光显影点的设置位置和数量可以根据实际需要设置。In order to observe the position of the thrombus filter in the blood vessel, the filter umbrella 1100 is provided with fluorescent developing spots (not shown in the figure), so that the filter umbrella 1100 is identifiable under fluoroscopy equipment. The location and quantity of fluorescent developing points can be set according to actual needs.
所述的血栓过滤器中，收线2100是用于将过滤伞1100开口合拢，形成一个封闭血栓的空间，所述收线2100沿过滤伞1100开口部1120分散设置至少两根，优选所述收线2100均匀设置至少两根，在这多根收线2100中，每根收线2100的一端固定在过滤伞1100开口部1120，多根收线2100各自分散固定在过滤伞的开口部1120的端面上，另一端汇集与牵引机构固定连接。当拉动牵引机构时，收线2100向牵引机构收缩，带动过滤伞1100的开口同时向牵引机构合拢。均匀设置收线2100，可以均匀合拢，避免产生间隙，防止血栓外泄。In the thrombus filter, the take-up wires 2100 are used to close the opening of the filter umbrella 1100 to form a space for closing the thrombus. At least two wires 2100 are evenly arranged. Among the multiple wires 2100, one end of each wire 2100 is fixed on the opening 1120 of the filter umbrella 1100, and the multiple wires 2100 are respectively dispersed and fixed on the end surface of the opening 1120 of the filter umbrella. , and the other end is fixedly connected with the traction mechanism. When the traction mechanism is pulled, the take-up wire 2100 shrinks toward the traction mechanism, and drives the opening of the filter umbrella 1100 to close toward the traction mechanism at the same time. Evenly setting the take-up wire 2100 can be evenly closed, avoiding gaps and preventing thrombus from leaking out.
所述收线2100一端穿过过滤伞1100的开口部1120的网状网孔，并固定在开口部1120靠近开口的网孔中，收线2100采用柔顺的高分子纤维制成的线材，如聚丙烯纤维线材、或者高分子量聚乙烯纤维线材，也可以采用高弹性金属丝线。优先的，本实施例中收线2100采用光滑的单股聚丙烯纤维线材，间隔地穿过过滤伞的开口部1120端面的网孔。One end of the take-up line 2100 passes through the mesh mesh of the opening 1120 of the filter umbrella 1100, and is fixed in the mesh near the opening of the opening 1120. The take-up line 2100 is made of soft polymer fibers, such as polyester Propylene fiber wire, or high-molecular-weight polyethylene fiber wire, or high-elastic metal wire can also be used. Preferably, the take-up wire 2100 in this embodiment adopts a smooth single-strand polypropylene fiber wire, which passes through the mesh on the end surface of the opening 1120 of the filter umbrella at intervals.
如图1、1a所示，推送导管1200在作用有两个，一个是用于推送过滤伞1100到达预定血管中的位置，另一个是建立通道，其他器械可以通过该通道输送至距离操作者的更远的位置进行工作。建立的通道就是推送导管1200的内腔，本实施例中，所述推送导管1200沿轴向至少设置两个贯通推送导管1200两端的内腔，所述内腔包括隔开的主腔1210和侧腔1220，且所有主腔1210和侧腔1220中分别各自穿装的容置物互不干扰。主腔1210和侧腔1220的隔开是指在空间上分成了两部分，主腔1210和侧腔1220可以是联通的，也可以不联通，只是穿装在主腔1210和侧腔1220的容置物不能相互干扰各自顺各自所在的内腔运动。优选所述牵引机构穿装所述侧腔1220中，并从过滤伞1100颈部1110的空腔向开口部1120延伸与收线2100固定连接。主腔1210作为导丝、球囊和其他介入器械等的输送通道，当需要向同路径输送器械，无需在血管上再次建立输送通道，推送导管1200主腔1210可作为其他介入器械的输送通道，其他器械可以通过该通道输送至距离操作者的更远的位置进行工作，降低器械见的干涉，降低手术风险，减少对患者的损伤。As shown in Figures 1 and 1a, the pushing catheter 1200 has two functions, one is used to push the filter umbrella 1100 to a predetermined position in the blood vessel, and the other is used to establish a channel through which other instruments can be transported to a distance from the operator. Work from a farther location. The channel established is the lumen of the pushing catheter 1200. In this embodiment, the pushing catheter 1200 is provided with at least two lumens penetrating both ends of the pushing catheter 1200 along the axial direction, and the lumens include a separated main lumen 1210 and a side cavity. chamber 1220, and the contents of all the main chambers 1210 and side chambers 1220 are not interfered with each other. The separation of the main chamber 1210 and the side chamber 1220 means that it is divided into two parts in space. The main chamber 1210 and the side chamber 1220 can be communicated or not connected, but they are only installed in the container of the main chamber 1210 and the side chamber 1220. The objects cannot interfere with each other and move along their respective inner chambers. Preferably, the traction mechanism is installed in the side cavity 1220 , and extends from the cavity of the neck 1110 of the filter umbrella 1100 to the opening 1120 and is fixedly connected with the take-up wire 2100 . The main lumen 1210 is used as a delivery channel for guide wires, balloons and other interventional instruments. When it is necessary to deliver instruments to the same path, there is no need to establish a delivery channel on the blood vessel again. The main lumen 1210 of the push catheter 1200 can be used as a delivery channel for other interventional instruments. Other instruments can be transported to a position farther away from the operator to work through this channel, reducing the interference of instruments, reducing the risk of surgery, and reducing the damage to patients.
主腔1210和侧腔1220位置根据实际需要设定，并且主腔1210和侧腔1220的直径或空间大小也根据实际需要设定，一般情况下，侧腔1220用于牵引机构，牵引机构体积小，横截面面积小，则侧腔1220设定直径相对主腔1210要小。主腔1210用于其它介入器械，通道相对较大，因此主腔1210直径大。侧腔1220的位置一般位于主腔1210的一侧，偏离主腔1210的中心。The positions of the main cavity 1210 and the side cavity 1220 are set according to the actual needs, and the diameter or space size of the main cavity 1210 and the side cavity 1220 are also set according to the actual needs. Generally, the side cavity 1220 is used for the traction mechanism, and the traction mechanism is small in size , the cross-sectional area is small, and the set diameter of the side chamber 1220 is smaller than that of the main chamber 1210 . The main lumen 1210 is used for other interventional instruments, and the channel is relatively large, so the diameter of the main lumen 1210 is large. The position of the side chamber 1220 is generally located on one side of the main chamber 1210 , away from the center of the main chamber 1210 .
推送导管1200的内腔形状根据需要设定，可以是所需要的任何形状，一般推送导管1200每个内腔横截面都为圆形或椭圆形，方便器械在内腔中顺畅运动。The shape of the lumen of the pushing catheter 1200 is set according to needs, and can be any shape required. Generally, the cross-section of each lumen of the pushing catheter 1200 is circular or elliptical, which facilitates the smooth movement of the instrument in the lumen.
推送导管1200多个内腔的形成，可以采用多种方式，一种是所述推送导管1200本身就是多腔管，优先的，如图1、1a所示，本实施例中推送导管1200采用双腔管，包含一个主腔1210和一个侧腔1220。推送导管1200可以是采用塑胶材料直接挤出的双腔管或多腔管，另外一种方式，为了提高推送导管1200的抗折性或者推送性，也可以采用两个或多个管体套装形成套管，套管之间通过粘接、热熔或者热缩而成的多腔管。The formation of more than 1200 lumens of the push catheter can be formed in various ways. One is that the push catheter 1200 itself is a multi-lumen tube, which is preferred. As shown in Figures 1 and 1a, the push catheter 1200 in this embodiment adopts double The lumen tube includes a main lumen 1210 and a side lumen 1220 . The pushing catheter 1200 can be a double-lumen tube or a multi-lumen tube that is directly extruded from plastic materials. In another way, in order to improve the bending resistance or pushing performance of the pushing catheter 1200, it can also be formed by using two or more tubes. Sleeve, a multi-lumen tube formed by bonding, heat melting or heat shrinking between the sleeves.
过滤伞颈部1110固定在推送导管头端1230的侧壁内，并须保持推送导管1200的主腔1210与过滤伞颈部1110的空腔通畅，过滤伞颈部1110可以通过焊接、熔接、粘接或其他机械连接等方式与推送导管头端1230固定连接在一起。The filter umbrella neck 1110 is fixed in the side wall of the push catheter head end 1230, and the main cavity 1210 of the push catheter 1200 and the cavity of the filter umbrella neck 1110 must be kept unobstructed. The filter umbrella neck 1110 can be welded, welded, bonded The head end 1230 of the pushing catheter is fixedly connected together by connecting or other mechanical connections.
如图1、1a、6a、6b、8所示，牵引件2200的结构可以有两种，一种是软性的线材，一种是硬质的杆状或管状结构。对应牵引的方向有两种，一种是牵引收线2100向后运动，一种是牵引收线2100向前运动。向后运动可以采用软性的牵引件2200，也可以采用硬质的牵引件2200，向前运动采用硬质的牵引件2200。则对应牵引机构也包括两种结构：As shown in Figures 1, 1a, 6a, 6b, and 8, there are two structures of the pulling member 2200, one is a soft wire, and the other is a hard rod or tubular structure. There are two directions corresponding to the traction, one is that the traction take-up line 2100 moves backward, and the other is that the traction take-up line 2100 moves forward. The backward movement can adopt soft traction member 2200, also can adopt hard traction member 2200, forward movement adopts hard traction member 2200. The corresponding traction mechanism also includes two structures:
一种是如图1、1a所示是本实施例牵引机构的具体结构，所述的血栓过滤器中，优选所述牵引机构包括与收线2100端部固定连接的牵引件2200、用于穿装牵引件2200的支撑导管2300，所述支撑导管2300穿装在所述推送导管1200的内腔中，所述牵引件2200和支撑导管2300分别连接手柄。这种结构中，可以采用软性的牵引件2200，也可采用硬质的牵引件2200，该结构中牵引件2200向后运动拉动收线2100向后运动合拢过滤伞1100。One is the specific structure of the traction mechanism of this embodiment as shown in Figures 1 and 1a. In the thrombus filter, preferably the traction mechanism includes a traction member 2200 fixedly connected to the end of the take-up wire 2100 for threading The support catheter 2300 of the traction member 2200 is installed, and the support catheter 2300 is installed in the inner cavity of the push catheter 1200, and the traction member 2200 and the support catheter 2300 are respectively connected to handles. In this structure, a soft traction member 2200 can be used, and a hard traction member 2200 can also be used. In this structure, the traction member 2200 moves backward to pull the take-up wire 2100 to move backward to close the filter umbrella 1100 .
软性的牵引件2200采用柔顺的高分子纤维，如聚丙烯缝线、尼龙线、高分子量聚乙烯纤维，也可以采用高弹性金属丝线。优先的，本实施例中牵引件2200优选采用多股聚丙烯纤维，牵引件2200与收线2100固定连接并穿过支撑导管2300内腔中。The soft traction member 2200 adopts soft polymer fibers, such as polypropylene sutures, nylon threads, high molecular weight polyethylene fibers, and high elastic metal threads can also be used. Preferably, in this embodiment, the traction member 2200 is preferably made of multi-strand polypropylene fibers, and the traction member 2200 is fixedly connected with the take-up wire 2100 and passes through the lumen of the support catheter 2300 .
硬质的牵引件2200可以采用杆状和管状结构，例如：金属管、金属杆、高分子材料杆或高分子材料管。The rigid traction member 2200 can adopt a rod-shaped or tubular structure, such as a metal tube, a metal rod, a polymer material rod or a polymer material tube.
所述支撑导管2300可以是高分子管材，也可以是金属管，支撑导管2300的轴向支撑力应至少大于过滤伞1100合拢所需要的拉力；优先的，本实施例中支撑导管2300采用光滑的聚四氟乙烯材料，穿过推送导管1200侧腔1220。The support conduit 2300 can be a polymer pipe, or a metal pipe, and the axial support force of the support conduit 2300 should be at least greater than the pulling force required for the filter umbrella 1100 to close; preferably, the support conduit 2300 in this embodiment is smooth. The polytetrafluoroethylene material passes through the side cavity 1220 of the pushing catheter 1200 .
另一种牵引机构的结构如图6a、6b所示，具体结构的描述见实施例2。The structure of another traction mechanism is shown in Figures 6a and 6b, and the description of the specific structure can be found in Embodiment 2.
具体实施过程如下：The specific implementation process is as follows:
经右股动脉穿刺，通过输送鞘管4000建立右股动脉经降主动脉至升主动脉的通道，本实用新型所涉及的血栓过滤器6000处于压缩的状态导入输送鞘管4000内，并推送至输送鞘管4000的远端，在荧光透视设备的引导下，调整输送鞘管4000的远端至升主动脉适宜的位置。逐步后撤输送鞘管4000，直至如图2所示，血栓过滤器6000的过滤伞1100完成伸出输送鞘管4000头端，并自膨胀完全张开成漏斗状，贴附于血管壁5100，在荧光透视设备下，通过荧光显影点检查血管过滤器6000的过滤伞1100是否完全张开，必要时，可以使用适宜的球囊进行扩张，使其具有更好的贴附性。如图3所示，利用血栓过滤器6000的推送导管主腔1210所形成的通道，进行主动脉球囊瓣7000扩张或者其他的手术操作。钙化的斑块等栓子5200在扩张过程中可能脱落，伴随着血流流向血栓过滤器6000，并被过滤伞1100捕获，扩张完成之后，撤出球囊导管7000。向前推送处于推送导管侧腔1220的支撑导管2300，直至推送导管1200与过滤伞1100约平齐的位置，并保持其位置；向后拉动支撑导管2300内的牵引件2200，此时，过滤伞1100的开口在收线2100的作用下逐步向牵引件2200一侧合拢，如图4所示，将脱落的斑块等栓子5200完全收纳于过滤伞1100内，在荧光透视设备下，检查血管过滤器6000的过滤伞1100是否完全合拢，此时血栓过滤器6000的过滤伞1100为椭圆形，并固定牵引件2200与支撑导管2300的相对位置；缓慢后撤血栓过滤器6000的推送导管1200，使其与支撑导管2300略微相对运动，如图5所示，将血栓过滤器6000的过滤伞1100变为橄榄形；整体后撤血栓过滤器6000，在推送导管1200的引导下，血栓过滤器6000很容易收纳于输送鞘管4000内，并将其整体撤出血管5000。Puncture through the right femoral artery, and establish a passage from the right femoral artery through the descending aorta to the ascending aorta through the delivery sheath tube 4000. The thrombus filter 6000 involved in the utility model is introduced into the delivery sheath tube 4000 in a compressed state and pushed to the The distal end of the delivery sheath 4000 is adjusted to a suitable position of the ascending aorta under the guidance of the fluoroscopic equipment. Gradually withdraw the delivery sheath 4000 until, as shown in Figure 2, the filter umbrella 1100 of the thrombus filter 6000 extends out of the head end of the delivery sheath 4000, and expands completely into a funnel shape by self-expansion, and attaches to the blood vessel wall 5100. Under the fluoroscopy device, check whether the filter umbrella 1100 of the blood vessel filter 6000 is fully opened through the fluorescent imaging point, and if necessary, use a suitable balloon to expand it to make it have better adhesion. As shown in FIG. 3 , the expansion of the aortic balloon valve 7000 or other surgical operations are performed using the channel formed by the main lumen 1210 of the pushing catheter of the thrombus filter 6000 . Calcified plaque and other emboli 5200 may fall off during the expansion process, and flow to the thrombus filter 6000 along with the blood flow, and be captured by the filter umbrella 1100. After the expansion is completed, the balloon catheter 7000 is withdrawn. Push forward the support conduit 2300 in the push conduit side cavity 1220 until the position where the push conduit 1200 is approximately flush with the filter umbrella 1100, and maintain its position; pull the traction member 2200 in the support conduit 2300 backward, at this time, the filter umbrella The opening of 1100 is gradually closed to the side of traction member 2200 under the action of take-up wire 2100, as shown in Figure 4, the emboli 5200 such as plaques that have fallen off are completely stored in filter umbrella 1100, and blood vessels are checked under fluoroscopy equipment. Whether the filter umbrella 1100 of the filter 6000 is completely closed. At this time, the filter umbrella 1100 of the thrombus filter 6000 is oval, and the relative position of the traction member 2200 and the support catheter 2300 is fixed; the push catheter 1200 of the thrombus filter 6000 is slowly withdrawn, Make it move slightly relative to the support catheter 2300, as shown in Figure 5, the filter umbrella 1100 of the thrombus filter 6000 is changed into an olive shape; It is easily received within the delivery sheath 4000 and withdrawn from the blood vessel 5000 as a whole.
实施例2，如图6a、6b所示，该实施例是另外一种实施方式。与实施例1不同的是所述牵引机构是直接穿装在推送导管1200内腔中的牵引件2200，由于取消了实施例1中的支撑导管，则牵引件2200为管状或杆状的硬质材料，所述牵引件2200的端部2210与收线2100固定连接、牵引件2200的另一端固定连接手柄。即血栓过滤器6000由过滤伞1100、推送导管1200、收线2100、牵引件2200和手柄(未画出)组成，通过牵引件2200完成推动动作，减少手术操作。同实施例1，牵引件2200位于推送导管1200的侧腔1220中，侧腔1220位于推送导管1200管壁处。Embodiment 2, as shown in Figures 6a and 6b, is another implementation. The difference from Embodiment 1 is that the traction mechanism is a traction member 2200 directly worn in the inner cavity of the push catheter 1200. Since the support catheter in Embodiment 1 is cancelled, the traction member 2200 is a tubular or rod-shaped hard material, the end 2210 of the pulling member 2200 is fixedly connected to the take-up wire 2100, and the other end of the pulling member 2200 is fixedly connected to the handle. That is, the thrombus filter 6000 is composed of a filtering umbrella 1100, a pushing catheter 1200, a take-up wire 2100, a traction member 2200 and a handle (not shown), and the pushing action is completed through the traction member 2200, thereby reducing surgical operations. Same as Embodiment 1, the traction member 2200 is located in the side cavity 1220 of the pushing catheter 1200 , and the side cavity 1220 is located at the tube wall of the pushing catheter 1200 .
除了如图6a所示的过滤伞1100的形状和结构，如图6b所示，该实施例中，还公开了过滤伞1100的另一种实施方式，与实施例1的过滤伞的轴对称不同，本实施例中过滤伞1100为非轴对称结构，牵引件2200位于过滤伞1100内靠近过滤伞1100的侧壁，该处侧壁从过滤伞1100的颈部1110至过滤伞的开口部1120，基本为顺直结构，可同时贴附在血管内壁上，过滤伞1100的其余部分侧壁拱起形成漏斗状，过滤伞的开口部1120的端面如图6b所示，相对于推送导管1200倾斜设置，也可以如图6a所示，垂直于推送导管1200设置。In addition to the shape and structure of the filter umbrella 1100 shown in Figure 6a, as shown in Figure 6b, in this embodiment, another embodiment of the filter umbrella 1100 is disclosed, which is different from the axial symmetry of the filter umbrella in Example 1 In this embodiment, the filter umbrella 1100 has a non-axisymmetric structure, and the traction member 2200 is located in the filter umbrella 1100 close to the side wall of the filter umbrella 1100, where the side wall is from the neck 1110 of the filter umbrella 1100 to the opening 1120 of the filter umbrella, It is basically a straight structure and can be attached to the inner wall of the blood vessel at the same time. The side walls of the rest of the filter umbrella 1100 are arched to form a funnel shape. , as shown in FIG. 6a , can also be arranged perpendicular to the pushing catheter 1200 .
如图6a、6b所示，本实施例中收线2100设置一根，该收线2100一端固定在过滤伞1100的开口部1120处的网孔中，收线2100顺次穿装在过滤伞1100的开口部1120，另一端与牵引机构固定连接。由于2100为一根收线，要想将过滤伞1100的开口部1120完整合拢，则需要牵引件2200选用硬质的杆状或管状结构，并且牵引件2200要靠近过滤伞开口部1120内壁设置，过滤伞1100可以采用非对称结构，一侧为顺直状态，如图6b所示。本实施例中，收线2100一端固定在过滤伞1100的开口部1120端面上，然后顺次穿过开口部1120的开口端面的网孔中，最后收线2100另一端与牵引件2200的端部2210固定连接。As shown in Figures 6a and 6b, one take-up line 2100 is provided in this embodiment, and one end of the take-up line 2100 is fixed in the mesh at the opening 1120 of the filter umbrella 1100, and the take-up line 2100 is sequentially worn on the filter umbrella 1100. The opening part 1120, the other end is fixedly connected with the traction mechanism. Since 2100 is a take-up line, in order to completely close the opening 1120 of the filter umbrella 1100, the traction member 2200 needs to be a hard rod-shaped or tubular structure, and the traction member 2200 should be set close to the inner wall of the filter umbrella opening 1120. The filter umbrella 1100 can adopt an asymmetric structure, with one side in a straight state, as shown in Figure 6b. In this embodiment, one end of the take-up line 2100 is fixed on the end surface of the opening 1120 of the filter umbrella 1100, and then passes through the mesh on the opening end surface of the opening 1120 in sequence, and finally the other end of the take-up line 2100 and the end of the traction member 2200 2210 fixed connection.
如图6a、7所示，参照实施例1的实施过程，将血栓过滤器在病变位置展开，待手术操作完成之后，其他介入器械撤出推送导管1200的主腔1210，此时，如图7所示，沿着推送导管1200的侧腔1220向前缓慢推送牵引件2200，牵引件2200的端部2210带动过滤伞的开口部1120开口端面的收线2100，使收线2100将过滤伞1100的开口部1120开口逐步向牵引件2200一侧合拢，将脱落的斑块或栓子5200完全收纳于过滤伞1100内，然后过滤器6000整体地回撤至输送导管4000内，并撤出体外。As shown in Figures 6a and 7, referring to the implementation process of Example 1, the thrombus filter is deployed at the lesion, and after the operation is completed, other interventional instruments are withdrawn from the main lumen 1210 of the pushing catheter 1200, at this time, as shown in Figure 7 As shown, along the side cavity 1220 of the push conduit 1200, the traction member 2200 is slowly pushed forward, and the end 2210 of the traction member 2200 drives the take-up line 2100 on the opening end face of the opening 1120 of the filter umbrella, so that the take-up line 2100 will move the filter umbrella 1100 The opening of the opening 1120 is gradually closed towards the side of the traction member 2200, and the shed plaque or emboli 5200 is completely stored in the filter umbrella 1100, and then the filter 6000 is withdrawn into the delivery catheter 4000 as a whole, and withdrawn from the body.
实施例3，如图8所示，本实施例涉及的术中血栓过滤器由过滤伞1100、收线2100、牵引件2200、支撑导管2300和手柄与实施例1相同。所不同的是，为本实施例中的推送导管1200为单腔管，具体讲，优选所述推送导管1200沿轴向设置一个贯通推送导管1200两端的内腔，所述牵引机构的外径小于内腔直径，使得牵引机构与内腔之间留有容置介入器械的空间；牵引机构包括牵引件2200和支撑导管2300。推送导管1200内腔既作为介入器械的输送通道，同时也作为支撑导管2300的输送通道，这样有利于减小了推送导管1200的壁厚，使其更加柔顺，同时也间接地减小了推送导管1200的外径或者增大了推送导管1200的内径，扩大器械的适用范围。Embodiment 3, as shown in FIG. 8 , the intraoperative thrombus filter involved in this embodiment is the same as that of Embodiment 1 by the filter umbrella 1100 , the take-up wire 2100 , the traction member 2200 , the support catheter 2300 and the handle. The difference is that the pushing catheter 1200 in this embodiment is a single-lumen tube. Specifically, it is preferred that the pushing catheter 1200 is provided with an inner lumen passing through both ends of the pushing catheter 1200 along the axial direction, and the outer diameter of the traction mechanism is less than The diameter of the lumen leaves a space for accommodating interventional instruments between the traction mechanism and the lumen; the traction mechanism includes a traction member 2200 and a support catheter 2300 . The lumen of the push catheter 1200 serves as the delivery channel of the interventional instrument and also serves as the delivery channel of the support catheter 2300, which helps to reduce the wall thickness of the push catheter 1200 and make it more flexible, and also indirectly reduces the pressure of the push catheter. The outer diameter of the catheter 1200 may increase the inner diameter of the push catheter 1200 to expand the scope of application of the device.
实施过程按照实施例1，将过滤器在病变位置展开，待手术完成之后，其他介入器械撤出推送导管1200的内腔，此时，沿着推送导管1200内腔的支撑导管2300，直至支撑导管2300与过滤伞1100大约平齐的位置，并保持其位置，向后拉动支撑导管2300内的牵引件2200，带动收线2100将过滤伞1100的开口逐步向推送导管1200中央合拢，将脱落的斑块或者血栓5200完全收纳于过滤伞1100内，然后过滤器6000整体地回撤至输送导管4000内，并撤出体外。The implementation process is as in Example 1, and the filter is deployed at the lesion position. After the operation is completed, other interventional instruments are withdrawn from the lumen of the pushing catheter 1200. 2300 is approximately flush with the filter umbrella 1100, and maintains its position, pulls the traction member 2200 in the support conduit 2300 backwards, drives the take-up line 2100 to gradually close the opening of the filter umbrella 1100 to the center of the push conduit 1200, and removes the fallen spot The clot or thrombus 5200 is completely contained in the filter umbrella 1100, and then the filter 6000 is withdrawn as a whole into the delivery catheter 4000 and out of the body.
实施例4，如图1、8所示，本实施例中，血栓过滤器由过滤伞1100、推送导管1200、收线2100、牵引件2200、支撑导管2300和手柄组成，可以与实施例1或3结构相同，血栓过滤器的操作方式也同实施例1或3相同，在此不再赘述。所不同的是，所述收线2100与牵引件2200为连续的一体结构，收线2100一端与过滤伞的开口部1120固定连接，牵引件2200与手柄固定连接。本实施例优选牵引件2200和收线2100都为线材，即收线2100和牵引件2200为同一根的连续线材，这种方式减少了合拢装置上的连接点数量，提高产品整体的可靠性，同时也有利于简化生产工艺。如图9所示，为了避免收放连续线材时，支撑导管2300的端面与连续线材的收线2100部分摩擦，在支撑导管2300前端设有聚线器2140，用于收拢多根的连续线材。聚线器2140为筒状结构，前端边缘为光滑弧面。聚线器2140的设置，不但适用于连续线材，也适用实施例1、3中的收线2100和牵引件2200。Embodiment 4, as shown in Figures 1 and 8, in this embodiment, the thrombus filter is composed of a filter umbrella 1100, a push catheter 1200, a take-up wire 2100, a traction member 2200, a support catheter 2300 and a handle, which can be compared with embodiment 1 or 3 have the same structure, and the operation mode of the thrombus filter is also the same as that of Embodiment 1 or 3, and will not be repeated here. The difference is that the take-up wire 2100 and the pulling member 2200 are a continuous integral structure, one end of the take-up wire 2100 is fixedly connected to the opening 1120 of the filter umbrella, and the pulling member 2200 is fixedly connected to the handle. In this embodiment, the preferred drawing member 2200 and the take-up member 2100 are all wire rods, that is, the take-up member 2100 and the drawing member 2200 are the same continuous wire rod. This method reduces the number of connection points on the closing device and improves the overall reliability of the product. It is also beneficial to simplify the production process. As shown in FIG. 9 , in order to avoid friction between the end surface of the support conduit 2300 and the take-up portion of the continuous wire 2100 when the continuous wire is retracted, a wire gatherer 2140 is provided at the front end of the support conduit 2300 for gathering multiple continuous wires. The wire concentrator 2140 is a cylindrical structure with a smooth arc surface at the front edge. The setting of the wire concentrator 2140 is not only applicable to the continuous wire, but also applicable to the wire take-up 2100 and the pulling member 2200 in Embodiments 1 and 3.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620130130.1UCN205459211U (en) | 2016-02-19 | 2016-02-19 | Thrombus filter |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620130130.1UCN205459211U (en) | 2016-02-19 | 2016-02-19 | Thrombus filter |
| Publication Number | Publication Date |
|---|---|
| CN205459211Utrue CN205459211U (en) | 2016-08-17 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620130130.1UExpired - Fee RelatedCN205459211U (en) | 2016-02-19 | 2016-02-19 | Thrombus filter |
| Country | Link |
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| CN (1) | CN205459211U (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105662647A (en)* | 2016-02-19 | 2016-06-15 | 杭州启明医疗器械有限公司 | Thrombus filter |
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| CN105662647A (en)* | 2016-02-19 | 2016-06-15 | 杭州启明医疗器械有限公司 | Thrombus filter |
| CN105662647B (en)* | 2016-02-19 | 2017-11-17 | 杭州启明医疗器械有限公司 | Thrombus filter |
| CN110392556A (en)* | 2017-03-13 | 2019-10-29 | 东丽株式会社 | Filter means |
| CN110392556B (en)* | 2017-03-13 | 2021-06-29 | 东丽株式会社 | Filter device |
| CN107157614A (en)* | 2017-06-14 | 2017-09-15 | 有研医疗器械（北京）有限公司 | The interim vena cava filter system of biconial |
| CN107157614B (en)* | 2017-06-14 | 2019-06-21 | 有研医疗器械（北京）有限公司 | The interim vena cava filter system of biconial |
| CN108420487A (en)* | 2018-04-10 | 2018-08-21 | 郑州大学第附属医院 | A kind of hook retracting device of visual controllable intracanal scaffold |
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| CN110251182A (en)* | 2019-06-14 | 2019-09-20 | 凯斯蒂南京医疗器械有限公司 | A kind of umbellate form tissue plug |
| CN111803178A (en)* | 2020-08-07 | 2020-10-23 | 华俊 | Embolectomy sleeve and embolectomy balloon catheter assembly kit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address | Address after:310051 311, 3 building, 2 building, 88 Jiangling Road, Binjiang District, Hangzhou, Zhejiang. Patentee after:Hangzhou Qiming Medical Devices Co.,Ltd. Address before:310053 Room 201, East Building, Tax Youyou Building, 3738 Nanhuan Road, Binjiang District, Hangzhou City, Zhejiang Province Patentee before:VENUS MEDTECH (HANGZHOU), Inc. | |
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee | Granted publication date:20160817 |