CN111671493A - A vascular protection device - Google Patents

Abstract

Translated fromChinese

本发明公开了一种血管保护装置，属于介入医疗技术领域。它包括外管、内管、外管连接件、内管连接件，还包括固定在内管近端的阻断滤网；所述阻断滤网远端开孔处与内管近端固定，阻断滤网上覆膜形成伞形阻断面。在病变治疗时，将阻断滤网放置于血管病变近端，阻断滤网上覆膜形成伞形阻断面临时阻断上游血流，降低由于血流冲击导致血栓或斑块脱落的风险；阻断滤网的伞形阻断面上设有网孔结构，可在病变治疗时拦截上游漂来的血栓或斑块；阻断滤网内腔两端设置开孔，开孔可供取栓导管等治疗器械通过，以便使用治疗器械治疗远端病变处血管；阻断滤网两端中部设置开孔，可使治疗器械始终保持在血管中心位置，降低治疗器械对血管的损伤。

The invention discloses a blood vessel protection device, which belongs to the technical field of interventional medicine. It includes an outer tube, an inner tube, an outer tube connector, an inner tube connector, and a blocking filter fixed at the proximal end of the inner tube; the opening at the distal end of the blocking filter is fixed with the proximal end of the inner tube, The blocking filter is covered with a film to form an umbrella-shaped blocking surface. During the treatment of lesions, the blocking filter is placed at the proximal end of the vascular lesion, and the blocking filter is covered with a membrane to form an umbrella block to block the upstream blood flow when facing, reducing the risk of thrombus or plaque shedding due to blood flow impact; The umbrella-shaped blocking surface of the blocking filter is provided with a mesh structure, which can intercept the thrombus or plaque floating upstream during the treatment of the disease; the two ends of the inner cavity of the blocking filter are provided with openings, and the openings can be used for thrombus removal. The catheter and other therapeutic instruments are passed through, so that the therapeutic instruments can be used to treat the blood vessels at the distal lesions; the openings are arranged in the middle of both ends of the blocking filter, so that the therapeutic instruments can always be kept in the center of the blood vessels and reduce the damage of the therapeutic instruments to the blood vessels.

Description

Translated fromChinese

一种血管保护装置A vascular protection device

技术领域technical field

本发明涉及一种血管保护装置，属于介入医疗技术领域。The invention relates to a blood vessel protection device, which belongs to the technical field of interventional medicine.

背景技术Background technique

血管介入治疗过程中，病变处的血栓或斑块会脱落，在血流冲击下会栓塞下游血管，影响远端血流和组织灌溉。医学上近端、远端是以人体躯干为参照物的，近端就是距离躯干近的一端，相反距离躯干远的一端就是远端。目前，血管保护装置大多采用伞形过滤器放置于病变远端，用来收集病变处脱落的血栓或斑块，防止远端栓塞。这种过滤器在使用时必须先穿越病变处才能够到达远端，受过滤器自身直径的影响，其在穿越病变时同样会引起血栓或斑块脱落，导致远端血管栓塞。与此同时，如果脱落的血栓或斑块较多超出过滤器最大承载量，治疗结束回收过滤器会发生血栓或斑块溢出，导致远端血管栓塞。During vascular interventional therapy, the thrombus or plaque at the lesion will fall off, and will embolize downstream blood vessels under the impact of blood flow, affecting distal blood flow and tissue irrigation. In medicine, the proximal and distal ends are based on the human torso, the proximal end is the end that is close to the torso, and the opposite end is the distal end. At present, most of the vascular protection devices use an umbrella filter placed at the distal end of the lesion to collect the thrombus or plaque that falls off the lesion and prevent distal embolism. When this filter is used, it must first pass through the lesion before it can reach the distal end. Affected by the diameter of the filter itself, it will also cause thrombus or plaque to fall off when passing through the lesion, resulting in distal vascular embolism. At the same time, if the shedding thrombus or plaque exceeds the maximum capacity of the filter, the thrombus or plaque will overflow when the filter is recovered at the end of treatment, resulting in distal vascular embolism.

因此，设计了一种血管保护装置，它能够减小由于血流冲击导致血栓或斑块脱落的风险，降低治疗器械对血管的损伤。Therefore, a blood vessel protection device is designed, which can reduce the risk of thrombus or plaque shedding due to blood flow shock, and reduce the damage to blood vessels caused by the treatment device.

发明内容SUMMARY OF THE INVENTION

本发明所要解决的技术问题在于：提供一种血管保护装置，它解决了目前过滤器在使用时必须先穿越病变处才能够到达远端，受过滤器自身直径的影响，其在穿越病变时同样会引起血栓或斑块脱落，导致远端血管栓塞的问题。The technical problem to be solved by the present invention is: to provide a blood vessel protection device, which solves the problem that the current filter must first pass through the lesion before reaching the distal end. It can cause thrombus or plaque to fall off, leading to the problem of distal blood vessel embolism.

本发明所要解决的技术问题采取以下技术方案来实现：The technical problem to be solved by this invention adopts the following technical solutions to realize:

一种血管保护装置，它包括外管、内管、外管连接件、内管连接件，所述外管内部设有内管，外管远端密封连接有外管连接件，内管远端伸出外管之外，内管远端密封连接有内管连接件，还包括固定在内管近端的阻断滤网；A blood vessel protection device, comprising an outer tube, an inner tube, an outer tube connector, and an inner tube connector, wherein the outer tube is provided with an inner tube, the distal end of the outer tube is sealed and connected with an outer tube connector, and the distal end of the inner tube is provided with an outer tube connector. Extending out of the outer tube, the distal end of the inner tube is sealed and connected with an inner tube connector, and also includes a blocking filter fixed at the proximal end of the inner tube;

所述阻断滤网是由记忆合金制作而成的纺锤形滤网，阻断滤网近端和远端的中部分别设有开孔；The blocking filter screen is a spindle-shaped filter screen made of memory alloy, and the middle parts of the proximal end and the distal end of the blocking filter screen are respectively provided with openings;

所述阻断滤网远端开孔处与内管近端固定，阻断滤网上覆膜形成伞形阻断面。The opening at the distal end of the blocking filter screen is fixed with the proximal end of the inner tube, and the blocking filter screen is covered with a film to form an umbrella-shaped blocking surface.

作为优选实例，所述伞形阻断面上均匀设有网孔。As a preferred example, the umbrella-shaped blocking surface is evenly provided with mesh holes.

作为优选实例，所述伞形阻断面采用ePTFE膜或TPU膜。As a preferred example, the umbrella-shaped blocking surface adopts an ePTFE film or a TPU film.

作为优选实例，所述阻断滤网是由记忆合金通过激光雕刻或编织而成的表面镂空的纺锤形滤网。As a preferred example, the blocking filter is a spindle-shaped filter whose surface is hollowed out by laser engraving or weaving from memory alloy.

作为优选实例，所述阻断滤网的近端和远端开孔位于同一轴线上。As a preferred example, the proximal and distal openings of the blocking screen are located on the same axis.

本发明的有益效果是：The beneficial effects of the present invention are:

(1)在病变治疗时，将阻断滤网放置于血管病变近端，阻断滤网上覆膜形成伞形阻断面临时阻断上游血流，降低由于血流冲击导致血栓或斑块脱落的风险；(1) During the treatment of lesions, the blocking filter is placed at the proximal end of the vascular lesion, and the blocking filter is covered with a membrane to form an umbrella-shaped block to block the upstream blood flow when facing, so as to reduce the thrombus or plaque falling off due to blood flow impact. risks of;

(2)阻断滤网的伞形阻断面上设有网孔结构，可在病变治疗时拦截上游漂来的血栓或斑块，并允许少量血液流动，以降低阻断对身体的影响，少量血液流动不会对下游血栓或斑块形成较大冲击；(2) The umbrella-shaped blocking surface of the blocking filter is provided with a mesh structure, which can intercept the thrombus or plaque floating upstream during the treatment of lesions, and allow a small amount of blood flow to reduce the impact of blocking on the body. A small amount of blood flow will not have a large impact on downstream thrombus or plaque;

(3)阻断滤网内腔两端设置开孔，开孔可供取栓导管等治疗器械通过，以便使用治疗器械治疗远端病变处血管，取栓导管穿过开孔将拦截的血栓或斑块吸取后清除至体外；(3) There are openings at both ends of the inner lumen of the blocking filter, and the openings can be used for the passage of therapeutic devices such as thrombectomy catheters, so that the treatment devices can be used to treat the blood vessels at the distal lesions. The plaque is removed from the body after suction;

(4)阻断滤网两端中部设置开孔，可使治疗器械始终保持在血管中心位置，降低治疗器械对血管的损伤。(4) The openings are arranged in the middle of both ends of the blocking filter, so that the treatment device can always be kept at the center of the blood vessel, and the damage to the blood vessel by the treatment device can be reduced.

附图说明Description of drawings

图1为本发明的结构示意图；Fig. 1 is the structural representation of the present invention;

图2为由人字形结构构成的阻断滤网结构示意图；2 is a schematic structural diagram of a blocking filter screen composed of a herringbone structure;

图3为由条形折弯结构围成的阻断滤网结构示意图；3 is a schematic structural diagram of a blocking filter screen surrounded by a strip-shaped bending structure;

图4为本发明采用阻断滤网远端设置伞形阻断面的结构示意图；FIG. 4 is a schematic structural diagram of the present invention adopting the configuration of the umbrella-shaped blocking surface at the distal end of the blocking filter screen;

图5为带网孔的人字形阻断滤网的侧面结构示意图；Fig. 5 is the side structure schematic diagram of the herringbone-shaped blocking filter screen with mesh;

图6为带网孔的人字形阻断滤网的端面结构示意图；Fig. 6 is the end face structure schematic diagram of the herringbone blocking filter screen with mesh;

图7为带网孔的条形折弯阻断滤网侧面结构示意图；Fig. 7 is the side structure schematic diagram of the strip-shaped bending blocking filter screen with mesh;

图8为实施例1在手术中的结构示意图；Fig. 8 is the structural representation ofembodiment 1 in operation;

图9为实施例2在手术中的结构示意图；Fig. 9 is the structural representation ofembodiment 2 in operation;

图10为实施例2的取栓导管回撤到阻断滤网内的结构示意图。10 is a schematic structural diagram of the thrombectomy catheter of Example 2 withdrawing into the blocking filter.

图中：外管1，内管2，外管连接件3，内管连接件4，阻断滤网5，开孔51，伞形阻断面52，网孔53，血管6，导丝7，取栓导管8。In the figure:outer tube 1,inner tube 2,outer tube connector 3,inner tube connector 4,blocking filter 5,opening 51,umbrella blocking surface 52,mesh 53,blood vessel 6,guide wire 7 ,thrombectomy catheter 8.

具体实施方式Detailed ways

为了对本发明的技术手段、创作特征、达成目的与功效易于明白了解，下面结合具体图示，进一步阐述本发明。In order to easily understand the technical means, creation features, achievement goals and effects of the present invention, the present invention will be further described below with reference to the specific figures.

本文所说的近端对应图中的左边，远端对应图中的右边。The near end mentioned in this article corresponds to the left side in the figure, and the far end corresponds to the right side in the figure.

如图1-图10所示，一种血管保护装置，它包括外管1、内管2、外管连接件3、内管连接件4，外管1内部设有内管2，外管1远端密封连接有外管连接件3，内管2远端伸出外管1之外，内管2远端密封连接有内管连接件4，还包括固定在内管2近端的阻断滤网5；As shown in Figures 1-10, a blood vessel protection device includes anouter tube 1, aninner tube 2, anouter tube connector 3, and aninner tube connector 4. Theouter tube 1 is provided with aninner tube 2, and anouter tube 1 The distal end is sealed and connected with theouter tube connector 3, the distal end of theinner tube 2 extends out of theouter tube 1, the distal end of theinner tube 2 is sealed and connected with theinner tube connector 4, and also includes a blocking filter fixed at the proximal end of theinner tube 2.net 5;

如图2、图3所示，阻断滤网5是由记忆合金制作而成的纺锤形滤网，阻断滤网5近端和远端的中部分别设有开孔51。As shown in FIG. 2 and FIG. 3 , theblocking filter screen 5 is a spindle-shaped filter screen made of memory alloy, andopenings 51 are respectively provided in the middle of the proximal end and the distal end of theblocking filter screen 5 .

阻断滤网5是由记忆合金通过激光雕刻或编织而成的表面镂空的纺锤形滤网。阻断滤网5还可以使用记忆合金丝焊接而成。其中，图2为由滤网领域常见的人字形结构构成的阻断滤网结构；图3为由滤网领域常见的条形折弯结构围成的阻断滤网结构。The blockingfilter screen 5 is a spindle-shaped filter screen with a hollow surface made of memory alloy by laser engraving or weaving. Theblocking filter 5 can also be welded with memory alloy wires. Among them, FIG. 2 is a blocking filter screen structure composed of a common herringbone structure in the filter screen field; FIG. 3 is a blocking filter screen structure surrounded by a common strip-shaped bending structure in the filter screen field.

阻断滤网5远端开孔51处与内管2近端固定，阻断滤网5上覆膜形成伞形阻断面52。The opening 51 at the distal end of theblocking filter screen 5 is fixed to the proximal end of theinner tube 2 , and the blockingscreen 5 is covered with a film to form an umbrella-shaped blocking surface 52 .

如图4所示，阻断滤网5的远端覆膜形成伞形阻断面52；如图1所示，阻断滤网5的近端覆膜形成伞形阻断面52；两者都能起到阻断作用。As shown in FIG. 4 , the membrane at the distal end of theblocking filter screen 5 forms an umbrella-shaped blocking surface 52 ; as shown in FIG. 1 , the membrane at the proximal end of theblocking filter screen 5 forms an umbrella-shaped blocking surface 52 ; can have a blocking effect.

阻断滤网5的近端和远端开孔51位于同一轴线上。The proximal anddistal openings 51 of the blockingscreen 5 are located on the same axis.

如图5-图7所示，伞形阻断面52上均匀设有网孔53。As shown in FIGS. 5-7 ,mesh holes 53 are uniformly provided on the umbrella-shapedblocking surface 52 .

伞形阻断面52采用ePTFE膜或TPU膜。The umbrella-shapedblocking surface 52 adopts ePTFE film or TPU film.

实施例1Example 1

通过挤出成型、注塑成型等加工工艺制作外管1、内管2、外管连接件3、内管连接件4。通过激光雕刻镍钛合金管制作阻断滤网5，将ePTFE膜热熔在阻断滤网5的金属骨架上制成覆膜的伞形阻断面52，伞形阻断面52无网孔53，阻断滤网5远端开孔51处通过胶水粘接固定在内管2近端，内管连接件4粘接固定在内管2远端，外管连接件3粘接固定在外管1远端。Theouter tube 1 , theinner tube 2 , the outertube connecting piece 3 , and the innertube connecting piece 4 are fabricated through extrusion molding, injection molding and other processing techniques. The blockingfilter screen 5 is made by laser engraving a nickel-titanium alloy tube, and the ePTFE film is hot-melted on the metal skeleton of the blockingfilter screen 5 to form an umbrella-shaped blocking surface 52 covered with a film. The umbrella-shapedblocking surface 52 has no mesh holes. 53. Theopening 51 at the distal end of theblocking filter screen 5 is glued and fixed to the proximal end of theinner tube 2, theinner tube connector 4 is glued and fixed to the distal end of theinner tube 2, and theouter tube connector 3 is glued and fixed to the outer tube. 1 remote.

斑块去除手术治疗前，向前推进外管连接件3，使阻断滤网5完全收缩在外管1内并排出管内空气。Before plaque removal surgery, push theouter tube connector 3 forward, so that the blockingfilter 5 is completely retracted in theouter tube 1 and the air in the tube is exhausted.

如图8所示，手术过程中(图中箭头为血流方向)，穿刺血管6，导入导丝7(另购)至完全穿越病变(斑块)部位血管6。阻断滤网5在导丝7的指引下输送至距病变远端1-2cm处，固定内管连接件4，后撤外管连接件3，阻断滤网5在血管6内撑开，伞形阻断面52临时阻断血流。将取栓导管8(另购)沿导丝7推进至斑块处，开始斑块去除操作。在伞形阻断面52的作用下，斑块处血液被临时阻断，去除过程中的斑块碎片不会被冲向近端，而是被取栓导管8吸除，使斑块的清除更彻底。As shown in FIG. 8 , during the operation (the arrow in the figure is the direction of blood flow), theblood vessel 6 is punctured, and a guide wire 7 (purchased separately) is introduced to completely penetrate theblood vessel 6 at the lesion (plaque) site. The blockingfilter 5 is transported to 1-2 cm away from the distal end of the lesion under the guidance of theguide wire 7, theinner tube connector 4 is fixed, theouter tube connector 3 is withdrawn, and the blockingfilter 5 is stretched in theblood vessel 6. The umbrella-shapedblocking surface 52 temporarily blocks blood flow. The thrombectomy catheter 8 (sold separately) was advanced along theguide wire 7 to the plaque, and the plaque removal operation was started. Under the action of the umbrella-shapedblocking surface 52, the blood at the plaque is temporarily blocked, and the plaque fragments during the removal process will not be rushed to the proximal end, but will be sucked out by thethrombectomy catheter 8, so that the plaque can be removed. more thoroughly.

手术完毕后，将所有器件一同撤出人体。After the operation, all the devices are withdrawn from the body together.

实施例2Example 2

通过挤出成型、注塑成型等加工工艺制作外管1、内管2、外管连接件3、内管连接件4。Theouter tube 1 , theinner tube 2 , the outertube connecting piece 3 , and the innertube connecting piece 4 are fabricated through extrusion molding, injection molding and other processing techniques.

通过镍钛合金丝编织制作阻断滤网5，将TPU熔覆在阻断滤网5的金属骨架上制成覆膜伞形阻断面52，使用激光雕刻制作伞形阻断面52上的网孔53，阻断滤网5远端开孔51处通过胶水粘接固定在内管2近端，内管连接件4粘接固定在内管2远端，外管连接件3粘接固定在外管1远端。The blockingfilter screen 5 is made by weaving nickel-titanium alloy wires, TPU is clad on the metal skeleton of the blockingfilter screen 5 to form a film-coated umbrella-shapedblocking surface 52, and laser engraving is used to make the umbrella-shapedblocking surface 52.Mesh 53, theopening 51 at the distal end of theblocking screen 5 is glued and fixed at the proximal end of theinner tube 2, theinner tube connector 4 is glued and fixed at the distal end of theinner tube 2, and theouter tube connector 3 is glued and fixed at the distal end of theouter tube 1 .

血栓手术治疗前，向前推进外管连接件3，使阻断滤网5完全收缩在外管1内并排出管内空气。Before thrombus surgery, push theouter tube connector 3 forward, so that the blockingfilter 5 is completely retracted in theouter tube 1 and the air in the tube is discharged.

如图9、10所示，手术过程中(图中箭头为血流方向)，穿刺血管6，导入导丝7(另购)至完全穿越病变(血栓)部位血管6。阻断滤网5在导丝7的指引下输送至距病变远端1-2cm处，固定内管连接件4，后撤外管连接件3，阻断滤网5在血管6内撑开，伞形阻断面52依靠网孔53过滤血液。将取栓导管8(另购)沿导丝12推进至血栓13处开始取栓操作。在血栓的治疗过程中易发生上游的血栓继续漂移到治疗区域，在伞形阻断面52和网孔53的共同作用下，漂移来的血栓被收集在阻断滤网5内。如图10，待取栓导管8将近端的血栓取出后，回撤到阻断滤网5内，继续将阻断滤网5内收集到的血栓清除干净。As shown in Figures 9 and 10, during the operation (the arrow in the figure is the direction of blood flow), theblood vessel 6 is punctured, and a guide wire 7 (purchased separately) is introduced to completely penetrate theblood vessel 6 at the lesion (thrombosis) site. The blockingfilter 5 is transported to 1-2 cm away from the distal end of the lesion under the guidance of theguide wire 7, theinner tube connector 4 is fixed, theouter tube connector 3 is withdrawn, and the blockingfilter 5 is stretched in theblood vessel 6. The umbrella-shapedblocking surface 52 relies on themesh 53 to filter the blood. The thrombectomy catheter 8 (sold separately) is advanced along the guide wire 12 to the thrombus 13 to start the thrombectomy operation. During the thrombus treatment process, the upstream thrombus is likely to continue to drift to the treatment area. Under the combined action of the umbrella-shapedblocking surface 52 and themesh hole 53 , the drifted thrombus is collected in the blockingfilter screen 5 . As shown in FIG. 10 , after the thrombus at the proximal end of thethrombectomy catheter 8 is taken out, it is withdrawn into the blockingfilter 5 , and the thrombus collected in the blockingfilter 5 is continued to be removed.

血栓抽吸完毕后，将所有器件一同撤出人体。After the thrombus aspiration is completed, all devices are withdrawn from the body together.

工作原理：working principle:

在病变治疗时，将阻断滤网5放置于血管6病变近端，阻断滤网5上覆膜形成伞形阻断面52临时阻断上游血流，降低由于血流冲击导致血栓或斑块脱落的风险；During the treatment of the lesion, the blockingfilter 5 is placed at the proximal end of theblood vessel 6, and the umbrella-shapedblocking surface 52 formed by the film on the blockingfilter 5 temporarily blocks the upstream blood flow, so as to reduce the thrombus or plaque caused by the impact of blood flow. the risk of the block falling off;

阻断滤网5的伞形阻断面52上设有网孔53结构，可在病变治疗时拦截上游漂来的血栓或斑块，并允许少量血液流动，以降低阻断对身体的影响，少量血液流动不会对下游血栓或斑块形成较大冲击；The umbrella-shapedblocking surface 52 of the blockingfilter screen 5 is provided with amesh 53 structure, which can intercept the thrombus or plaque floating upstream during the treatment of the lesion, and allow a small amount of blood to flow, so as to reduce the impact of blocking on the body, A small amount of blood flow will not have a large impact on downstream thrombus or plaque;

阻断滤网5内腔两端设置开孔51，开孔51可供取栓导管等治疗器械通过，以便使用治疗器械治疗远端病变处血管6，取栓导管穿过开孔51将拦截的血栓或斑块吸取后清除至体外；The two ends of the inner cavity of the blockingfilter screen 5 are provided withopenings 51, and theopenings 51 can be used for the passage of therapeutic instruments such as thrombectomy catheters, so as to use the therapeutic instruments to treat theblood vessels 6 at the distal lesions. The thrombus or plaque is removed from the body after suction;

阻断滤网5两端中部设置开孔51，可使治疗器械始终保持在血管中心位置，降低治疗器械对血管6的损伤。Theopenings 51 are provided in the middle of both ends of the blockingfilter screen 5, so that the treatment device can always be kept at the center of the blood vessel, and the damage to theblood vessel 6 by the treatment device can be reduced.

以上显示和描述了本发明的基本原理、主要特征和优点。本领域的技术人员应该了解，本发明不受上述实施例的限制，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入本发明要求保护的范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and without departing from the spirit and scope of the present invention, the present invention will also have various changes and improvements, and these changes and improvements all fall into the present invention within the scope of protection. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

Translated fromChinese

1.一种血管保护装置，它包括外管、内管、外管连接件、内管连接件，所述外管内部设有内管，外管远端密封连接有外管连接件，内管远端伸出外管之外，内管远端密封连接有内管连接件，其特征在于，还包括固定在内管近端的阻断滤网；1. a vascular protection device, it comprises an outer tube, an inner tube, an outer tube connector, an inner tube connector, the outer tube is provided with an inner tube, the outer tube distal end is sealed and connected with an outer tube connector, and the inner tube is provided with an inner tube. The distal end extends out of the outer tube, and the distal end of the inner tube is sealed and connected with an inner tube connector, and is characterized in that it also includes a blocking filter screen fixed at the proximal end of the inner tube;所述阻断滤网是由记忆合金制作而成的纺锤形滤网，阻断滤网近端和远端的中部分别设有开孔；The blocking filter screen is a spindle-shaped filter screen made of memory alloy, and the middle parts of the proximal end and the distal end of the blocking filter screen are respectively provided with openings;所述阻断滤网远端开孔处与内管近端固定，阻断滤网上覆膜形成伞形阻断面。The opening at the distal end of the blocking filter screen is fixed with the proximal end of the inner tube, and the blocking filter screen is covered with a film to form an umbrella-shaped blocking surface.2.根据权利要求1所述一种血管保护装置，其特征在于，所述伞形阻断面上均匀设有网孔。2 . The blood vessel protection device according to claim 1 , wherein mesh holes are uniformly provided on the umbrella-shaped blocking surface. 3 .3.根据权利要求1或2所述一种血管保护装置，其特征在于，所述伞形阻断面采用ePTFE膜或TPU膜。3 . The blood vessel protection device according to claim 1 or 2 , wherein the umbrella-shaped blocking surface adopts an ePTFE film or a TPU film. 4 .4.根据权利要求1所述一种血管保护装置，其特征在于，所述阻断滤网是由记忆合金通过激光雕刻或编织而成的表面镂空的纺锤形滤网。4 . The blood vessel protection device according to claim 1 , wherein the blocking filter screen is a spindle-shaped filter screen with a hollow surface made of memory alloy by laser engraving or weaving. 5 .5.根据权利要求1所述一种血管保护装置，其特征在于，所述阻断滤网的近端和远端开孔位于同一轴线上。5 . The blood vessel protection device according to claim 1 , wherein the proximal and distal openings of the blocking filter are located on the same axis. 6 .

Images