Thrombectomy device

Abstract

A supporting frame body has a deformation function, a filter plug structure is assembled on the supporting frame body, the filter plug structure is provided with a filter plug inner cavity and a filter plug capturing opening communicated with the filter plug inner cavity, the filter plug capturing opening of the filter plug structure faces the near end direction, and filter plug mesh holes communicated with the filter plug inner cavity are formed in the surface of the filter plug structure; the thrombus filtering meshes allow blood to pass through and prevent thrombus from passing through, and the thrombus cutting structure is arranged on the supporting frame body and located in the near-end direction of the thrombus filtering structure. The thrombus extraction device adopts a thrombus extraction mode combining cutting and intercepting, wall-attached thrombus is rapidly cut into a free state convenient to collect, and based on the relative position design of the thrombus filtering structure and the thrombus cutting structure in the blood flow direction, broken thrombus in the free state can be carried by means of blood flow to enter the thrombus filtering structure, so that the thrombus extraction efficiency is improved. The thrombus filtering structure is used for intercepting broken thrombus, so that the broken thrombus is prevented from being washed away in an unexpected and destination-free manner, and the broken thrombus is effectively prevented from embolism in other blood vessel areas.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to a thrombectomy device. Background Art

[0002] Venous thromboembolism generally includes deep vein thrombosis of the lower extremities and pulmonary embolism. Deep vein thrombosis of the lower extremities is a common vascular surgical disease, which is mostly caused by abnormal coagulation of blood in the veins of the lower extremities, resulting in blood reflux obstruction. Pulmonary embolism has become the third leading cause of death from cardiovascular disease. Acute pulmonary embolism can lead to systemic hypotension and even total heart failure, which can lead to the death of the patient. Therefore, early, rapid and effective removal of thrombi can relieve venous obstruction and effectively prevent pulmonary embolism. Existing thrombus removal methods are mainly based on thrombus pulling and thrombus crushing and thrombus aspiration techniques. In the thrombus pulling technology, the existing filter has poor vascular adaptability, and small pieces of thrombus can easily leak from the gap between the thrombus pulling structure and the blood vessel wall and enter the downstream blood vessels along the direction of blood flow, which may block other important organs downstream and may eventually cause problems such as pulmonary embolism. Summary of the invention

[0003] Based on this, it is necessary to provide a thrombus removal device to address at least one of the technical problems mentioned above.

[0004] The present application provides a thrombus removal device, which comprises:

[0005] A support frame body, wherein the support frame body has a deformation function and is used to adaptively shrink or expand according to the magnitude of the force applied to the support frame body;

[0006] A filter plug structure, the filter plug structure is assembled on the supporting frame body, the filter plug structure has a deformation function, and is used to shrink and expand accordingly with the supporting frame body, the filter plug structure has a filter plug inner cavity and a filter plug capture port connected to the filter plug inner cavity, the filter plug capture port of the filter plug structure faces the proximal direction, and the surface of the filter plug structure is provided with a filter plug mesh connected to the filter plug inner cavity, and the filter plug mesh allows blood to pass through and prevents thrombus from passing through;

[0007] A cutting bolt structure is provided on the supporting frame body, and the cutting bolt structure is located in the proximal direction of the filter bolt structure.

[0008] In one embodiment, the filter plug structure is a membrane body, and the membrane body covers the support frame body, thereby constructing the filter plug inner cavity and the filter plug capture port, and the filter plug mesh is opened on the surface of the membrane body.

[0009] In one embodiment, the edge of the filter plug capture port is connected to the support frame body along the circumference of the support frame body, and is used to shrink or expand accordingly with the contraction or expansion of the support frame body; and / or,

[0010] The outer contour size of the membrane body gradually decreases from the proximal end to the distal end; and / or,

[0011] The membrane body is made of biocompatible material.

[0012] In one embodiment, the cutting bolt structure includes at least one group of annular cutting elements, at least one group of the annular cutting elements is arranged along the axial direction of the support frame body, each group of the annular cutting elements has a plurality of connection points along the annular circumference, and the plurality of connection points are connected to a plurality of positions on the support frame body along the circumference of the support frame body.

[0013] In one embodiment, each group of the annular cutting elements includes a plurality of V-shaped cutting pieces, and the plurality of V-shaped cutting pieces are sequentially connected end to end along the annular circumference to form the annular cutting element.

[0014] In one embodiment, at least a portion of the filter plug structure is located inside the frame of the supporting frame body; and / or,

[0015] The cutting bolt structure is located inside the frame of the supporting frame body.

[0016] In one embodiment, the support frame body comprises:

[0017] A filter plug frame region, on which the filter plug structure is assembled;

[0018] A bolt cutting frame region, the distal end of which is connected to the proximal end of the filter frame region, and the bolt cutting structure is assembled on the bolt cutting frame region;

[0019] The filter plug frame area and / or the cutting plug frame area have a guide unit section, and the outer contour size of the guide unit section of the filter plug frame area gradually decreases from the proximal end to the distal end, and the outer contour size of the guide unit section of the cutting plug frame area gradually decreases from the distal end to the proximal end.

[0020] In one embodiment, the filter plug frame area includes a plurality of filter plug support rods, the distal ends of the plurality of filter plug support rods are bundled and connected, and the proximal ends of the plurality of filter plug support rods are separated from each other;

[0021] The bolt cutting frame area includes a plurality of bolt cutting support rods, the proximal ends of the plurality of bolt cutting support rods are clustered and connected, and the distal ends of the plurality of bolt cutting support rods are separated from each other, wherein the proximal end of the filter bolt support rod is connected to the distal end of the bolt cutting support rod.

[0022] In one embodiment, the filter plug support rod extends from the distal end to the proximal end; or,

[0023] The filter plug support rod is spirally coiled along the filter plug frame area.

[0024] In one embodiment, the support frame body comprises:

[0025] A filter plug frame connecting element, through which the distal ends of the plurality of filter plug support rods are mutually bundled and connected; and / or,

[0026] The proximal ends of the plurality of the cutting bolt support rods are connected to each other in a cluster through the cutting bolt frame connecting element.

[0027] In the above-mentioned thrombus removal device, the filter plug structure is assembled on the support frame body, and is used to shrink and expand accordingly with the support frame body. The filter plug capture port of the filter plug structure can expand the opening as much as possible accordingly with the expansion of the support frame body. The filter plug structure has good blood vessel adaptability, improves the ability to capture thrombi, prevents thrombi from leaking sideways from the gap between the filter plug structure and the blood vessel wall, and avoids problems such as pulmonary embolism. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of a thrombus removal device provided in one embodiment of the present application.

[0029] Figure 2 A schematic structural diagram of a filter plug structure provided in one embodiment of the present application.

[0030] Figure 3 A schematic structural diagram of the filter plug frame area provided for one embodiment of the present application.

[0031] Figure 4 For Figure 3 A top view of the filter frame area is shown.

[0032] Figure 5 A schematic structural diagram of a bolt cutting frame area provided in one embodiment of the present application.

[0033] Figure 6 A schematic structural diagram of a cutting bolt structure provided in one embodiment of the present application.

[0034] Figure 7 A schematic structural diagram of a filter plug structure provided in another embodiment of the present application.

[0035] Figure 8 A schematic structural diagram of a filter plug structure provided in yet another embodiment of the present application.

[0036] Figure Number:

[0037] 100. Pull bolt parts;

[0038] 1000, support frame; 2000, filter plug structure; 3000, cutting plug structure;

[0039] 1000a, filter plug frame area; 1000b, cutting plug frame area; 1000c, guide unit section;

[0040] 2100, filter plug support rod; 2200, plug cutting support rod; 2100a, filter plug frame connecting element; 2200a, plug cutting frame connecting element;

[0041] 2000a, filter plug capture port; 2000b, filter plug mesh;

[0042] 3100, V-shaped cutting parts. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0044] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0045] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0047] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0049] See also Figure 1 As shown, an embodiment of the present application provides a thrombus removal device, which includes a support frame body 1000, a thrombus filtering structure 2000 and a thrombus cutting structure 3000. The support frame body 1000 has a deformation function. The deformation function is reflected in that when the support frame body 1000 is subjected to pressure applied in a target environment such as a blood vessel wall, the support frame body 1000 can adaptively shrink or expand according to the actual force applied to the support frame body 1000. This deformation function will enable the support frame body 1000 to adaptively change its volume according to the actual situation of the target environment. Taking the support frame body 1000 in a blood vessel as an example, when the thrombus removal device moves in the blood vessel, an interaction force will be formed between the thrombus removal device and the blood vessel wall of the blood vessel. For the support frame body 1000, the blood vessel wall will apply a corresponding force to the support frame body 1000, and the force will cause the support frame body 1000 to deform due to the force.

[0050] When the blood vessel is thicker, the force acting on the support frame body 1000 is smaller, and it will adaptively cause a smaller degree of contraction. When the blood vessel is thinner, the force acting on the support frame body 1000 is larger, and it will adaptively cause a larger degree of contraction. In summary, the deformation ability of the support frame body 1000 will enable the support frame body 1000 to adaptively adjust its own volume size according to the actual spatial size of the target environment such as the blood vessel when it is in the target environment such as the blood vessel, adapt to the current target environment, and adaptively contract or expand. This can enable the thrombus removal device to adapt to the actual structure of the blood vessel, so as to capture the thrombus as much as possible and avoid compressing the blood vessel wall and causing damage.

[0051] The filter plug structure 2000 is assembled on the supporting frame body 1000. The filter plug structure 2000 has a deformation function, and the deformation function of the filter plug structure 2000 is used to make the filter plug structure 2000 shrink and expand accordingly with the supporting frame body 1000. The filter plug structure 2000 has a filter plug inner cavity and a filter plug capture port 2000a connected to the filter plug inner cavity. The filter plug capture port 2000a of the filter plug structure 2000 faces the proximal direction. The surface of the filter plug structure 2000 is provided with a filter plug mesh 2000b connected to the filter plug inner cavity. The filter plug mesh 2000b allows blood to pass through and prevents thrombus from passing through. The plug cutting structure 3000 is arranged on the supporting frame body 1000, and the plug cutting structure 3000 is located in the proximal direction of the filter plug structure 2000.

[0052] The support frame body 1000 is the main structure of the thrombus removal device. The contraction and expansion of the support frame body 1000 can be reflected in the contraction state and the expansion state. The contraction state and the expansion state of the support frame body 1000 drive the thrombus filtering structure 2000 and the thrombus cutting structure 3000 to contract and expand accordingly. The contraction state indicates that the support frame body 1000 contracts to the state with the smallest diameter, and the expansion state indicates the maximum state that the support frame body 1000 can expand when it adapts to the diameter of the blood vessel. The thrombus removal device also has a contraction state and an expansion state due to the contraction and expansion of the support frame body 1000.

[0053] See also Figure 1 As shown, the thrombus removal device can be kept in a contracted state first, and can penetrate into the blood vessel and puncture the thrombus. The thrombus removal device is inserted into the blood vessel along the flow direction of the blood flow, and punctures the thrombus in the blood vessel. After the thrombus removal device passes through the thrombus, the thrombus removal device can be converted to an expanded state, and at this time the support frame body 1000 appears as shown in FIG. Figure 1In the expanded state shown, the thrombus filter structure 2000 and the thrombus cutting structure 3000 can be adaptively attached to the blood vessel wall in the blood vessel, and the thrombus filtering structure 2000 and the thrombus cutting structure 3000 are also expanded accordingly. By adaptively moving the thrombus removal device, the expanded thrombus cutting structure 3000 can cut the thrombus in the blood vessel, and change the thrombus from the attached state to the blood vessel wall to the free state, so that the thrombus removal is more thorough. Figure 1 In the upward direction) along the direction of blood flow, that is, the blood flow is in the direction of Figure 1 The free thrombus will flow along the direction of blood flow into the filter structure 2000, and the free thrombus will be captured by the filter structure 2000. After the thrombus is collected, the thrombus removal device is withdrawn from the body, and the thrombus is taken out of the body at the same time, and the whole thrombus pulling operation can be completed.

[0054] Therefore, the thrombus removal device provided by the present application adopts a thrombus removal method that combines cutting and interception. The attached thrombus on the wall of the blood vessel is first cut, which can remove the thrombus inside the blood vessel more quickly and thoroughly, and quickly cut the attached thrombus into a free state that is easy to collect. Based on the relative position design of the filter thrombus structure 2000 and the cutting thrombus structure 3000 in the direction of blood flow, the free-state broken thrombus can be carried into the filter thrombus structure 2000 by means of the flow of blood, and the filter thrombus structure 2000 is used to intercept the broken thrombus, preventing the broken thrombus from being washed away unexpectedly and purposelessly, and effectively preventing the broken thrombus from embolism in other blood vessel areas. In addition, the deformation ability of the support frame body 1000 will drive the filter thrombus structure 2000 and the cutting thrombus structure 3000 to adaptively adjust their own volume according to the spatial size of the blood vessel, so that the cutting thrombus structure 3000 can adhere to the blood vessel wall of the blood vessel when cutting the thrombus, improve the effect of cutting the thrombus, and improve the efficiency of pulling the thrombus.

[0055] The filter structure 2000 can adopt a variety of structures and shapes that are convenient for capturing thrombi, as well as suitable biocompatible materials. As long as the filter structure 2000 can be placed harmlessly in the blood vessel and smoothly collect the thrombi cut by the thrombus cutting structure 3000, those skilled in the art can select suitable structures, shapes and materials to construct the filter structure 2000 according to actual needs, and no limitation is made here. In one embodiment, the filter structure 2000 is constructed by a soft membrane, which has compliance and can be elastically deformed under the action of external force. Since the support frame body 1000 has constructed a main structure, the membrane can be covered on the support frame body 1000, including covering the outside or inside of the support frame body 1000, and the shape of the filter structure 2000 is constructed by means of the main structure of the support frame body 1000, so as to construct a filter lumen for accommodating thrombi and a filter capture port 2000a for capturing thrombi, wherein the filter mesh 2000b can also be opened on the surface of the membrane according to actual needs. Therefore, the filter plug structure 2000 is constructed with a soft membrane. The filter plug structure 2000 has a filter plug inner cavity and a filter plug capture port 2000a connected to the filter plug inner cavity. The filter plug capture port 2000a can expand the opening accordingly as much as possible as the support frame body 1000 is unfolded. The filter plug structure 2000 has good blood vessel adaptability, improves the ability to capture thrombi, and prevents thrombi from leaking from the gap between the filter plug structure 2000 and the blood vessel wall.

[0056] See also Figure 2 As shown, the outer contour size of the membrane body gradually decreases from the proximal end to the distal end. This change in the outer contour size allows the membrane body to construct a larger filter thrombus capture port 2000a in the proximal direction to capture as many thrombi as possible and prevent the leakage of free thrombi. In the distal direction of the membrane body, a smaller size suitable for movement and not interfering with the blood vessel wall can be formed, that is, the proximal end is open and the distal end is closed. The outer contour size gradually decreases from the proximal end to the distal end, which is manifested as the largest opening size at the proximal end and gradually closes toward the distal end. For example, the membrane body can be constructed as follows Figure 2 The umbrella-like conical structure shown is suitable for intercepting free broken plugs.

[0057] Moreover, the filter thrombus capture port 2000a may expand its opening as much as possible as the support frame body 1000 is expanded, thereby improving the ability to capture thrombi and preventing thrombi from leaking out. In one embodiment, the edge of the filter thrombus capture port 2000a may be connected to the support frame body 1000 along the circumferential direction of the support frame body 1000, so that the filter thrombus capture port 2000a can shrink or expand accordingly as the support frame body 1000 shrinks or expands. When the support frame body 1000 is expanded to the maximum, the filter thrombus capture port 2000a can also open to the maximum size to fit the blood vessel wall, thereby reducing the risk of leakage of free small thrombi.

[0058] A part or all of the structure of the filter plug structure 2000 can be appropriately selected to be arranged on the inner side of the frame of the supporting frame body 1000. For example, a part of the filter plug structure 2000 close to the distal end or a part of the filter plug structure 2000 close to the proximal end is located on the inner side of the frame of the supporting frame body 1000, and the rest is located on the outer side of the frame of the supporting frame body 1000, or the filter plug structure 2000 is attached as a whole to the inner side of the frame of the supporting frame body 1000. Those skilled in the art can select the arrangement position and arrangement method of the filter plug structure 2000 on the supporting frame body 1000 according to actual needs, and there is no limitation here, as long as damage to the blood vessels can be avoided.

[0059] In one embodiment, the bolt cutting structure 3000 is assembled on the support frame body 1000, and the bolt cutting structure 3000 has a deformation function, and the deformation function of the bolt cutting structure 3000 is used to make the bolt cutting structure 3000 also shrink and expand accordingly with the support frame body 1000. The bolt cutting structure 3000 can adopt a variety of structures and shapes that are convenient for cutting thrombus, as long as the bolt cutting structure 3000 can smoothly cut the thrombus. Those skilled in the art can select a suitable structure, shape and material to construct the bolt cutting structure 3000 according to actual needs, and no limitation is made here. On this basis, the bolt cutting structure 3000 may include at least one group of annular cutting elements, which are arranged along the axial direction of the support frame body, and each group of annular cutting elements has multiple connection points along the annular circumference, and the multiple connection points are connected to multiple positions on the support frame body 1000 along the circumferential direction of the support frame body 1000, so that the bolt cutting structure 3000 can shrink or expand accordingly with the contraction or expansion of the support frame body 1000, and adapt to the shape of the blood vessel, cutting the thrombus attached to the wall along the vascular wall of the blood vessel, thereby improving the thrombus cutting effect.

[0060] The annular cutting element can be constructed in a variety of structures and shapes, such as a circular ring, a wavy ring, etc. For example, in one embodiment, each group of annular cutting elements includes a plurality of V-shaped cutting pieces 3100, and the plurality of V-shaped cutting pieces 3100 are sequentially connected end to end along the annular circumference, thereby forming an annular cutting element formed by a plurality of V-shaped cutting pieces 3100 surrounding a circle. This annular cutting element can minimize the dragging of blood vessels during the process of cutting thrombus, reduce the damage caused by dragging blood vessels, and avoid the formation of new vascular lesions. The thrombus cutting structure 3000 can be appropriately selected to be arranged on the inner side of the frame of the support frame body 1000, and as close to the blood vessel wall as possible according to the needs, so as to improve the effect of cutting thrombus. Those skilled in the art can select the arrangement position and arrangement method of the thrombus cutting structure 3000 on the support frame body 1000 according to actual needs, which is not limited here.

[0061] The support frame body 1000 can be manufactured in a variety of ways, for example, the support frame body 1000 can be cut by pipes, etc. Moreover, the support frame body 1000 can be selected to adopt an integrated structure or a split structure according to needs. For example, in one embodiment, the support frame body 1000 includes a filter plug frame area 1000a and a cut plug frame area 1000b, so that the filter plug structure 2000 and the cut plug structure 3000 can have a clear area separation on the support frame body 1000, wherein the distal end of the cut plug frame area 1000b is connected to the proximal end of the filter plug frame area 1000a, the filter plug structure 2000 is assembled on the filter plug frame area 1000a, and the cut plug structure 3000 is assembled on the cut plug frame area 1000b.

[0062] See also Figure 1 As shown, the positions of the thrombus cutting structure 3000 and the thrombus cutting frame area 1000b are equivalent, and the thrombus cutting frame area 1000b also has a similar structure for cutting thrombi, so it can be understood that at this time, the thrombus cutting frame area 1000b of the support frame body 1000 can also be used as a substitute or auxiliary structure for the thrombus cutting structure 3000 to help cut thrombi. Those skilled in the art can improve the specific structure of the thrombus cutting frame area 1000b according to needs, for example, setting a sharp part that is conducive to cutting thrombi while ensuring safety to assist in cutting thrombi, which is not limited here.

[0063] The thrombus cutting frame area 1000b and the filter thrombus frame area 1000a may belong to separate bracket body structures, and then be connected by welding or the like, or the thrombus cutting frame area 1000b and the filter thrombus frame area 1000a may also belong to an integral structure, but the structural shape is specifically designed according to the functional and structural characteristics of the filter thrombus structure 2000 and the thrombus cutting structure 3000, so as to improve the thrombus capture and thrombus cutting effects of the filter thrombus structure 2000 and the thrombus cutting structure 3000. Those skilled in the art may make targeted designs according to needs, which is not limited here.

[0064] In one embodiment, the filter plug frame area 1000a may include a plurality of filter plug support rods 2100, the distal ends of the plurality of filter plug support rods 2100 are connected in a bundle, and the proximal ends of the plurality of filter plug support rods 2100 are separated from each other, forming a support structure with a small distal end and a large proximal end, similar to a cone or umbrella shape. The bolt cutting frame area 1000b may also include a plurality of bolt cutting support rods 2200, the proximal ends of the plurality of bolt cutting support rods 2200 are connected in a bundle, and the distal ends of the plurality of bolt cutting support rods 2200 are separated from each other, forming a support structure with a large distal end and a small proximal end, similar to a cone or umbrella shape. The proximal end of the filter plug support rod 2100 is connected to the distal end of the bolt cutting support rod 2200 to form a complete support frame body 1000. The filter plug support rod 2100 and the bolt cutting support rod 2200 may be made of nickel-titanium materials or the like according to requirements.

[0065] The filter plug support rod 2100 may be provided with a welding pipe, which can be hot-melted at a predetermined temperature. The hot-melting of the welding pipe can make the filter plug structure 2000 and the support frame body 1000 form a welded connection, wherein the welding pipe can be made of a heat-meltable polymer material. In addition, when the filter plug frame area 1000a adopts other structural forms, the heat-meltable polymer material can also be constructed to be suitable for assembly in the filter plug frame area 1000a and can be realized with the filter plug structure 2000 through hot melting. Those skilled in the art can set it according to the hot-melt connection requirements, which is not limited here.

[0066] See also Figure 7 As shown, in one embodiment, the filter plug support rod 2100 can extend in the direction from the distal end to the proximal end, so that each filter plug support rod 2100 maintains approximately equidistant adjacent spacing during the extension process from the distal end to the proximal end. Figure 8 As shown, the filter plug support rod 2100 can also be spirally wound along the circumferential direction of the filter plug frame area 1000a, and a similar cone outer contour is formed by spiral winding. Those skilled in the art can select a suitable shape to construct the plug cutting frame area 1000b and the filter plug frame area 1000a according to actual needs, which is not limited here.

[0067] In order to facilitate the smooth movement of the thrombus removal device in the blood vessel and achieve smooth advancement and withdrawal, a guide unit segment 1000c may be further provided in at least one of the thrombus filtering frame area 1000a and the thrombus cutting frame area 1000b. The guide unit segment 1000c may be constructed into a shape similar to a conical end. For example, the outer contour size of the guide unit segment 1000c on the thrombus filtering frame area 1000a gradually decreases from the proximal end to the distal end, and the outer contour size of the guide unit segment 1000c on the thrombus cutting frame area 1000b gradually decreases from the distal end to the proximal end. Those skilled in the art may choose to construct an adaptive guide unit segment 1000c in the thrombus filtering frame area 1000a and the thrombus cutting frame area 1000b according to actual needs to improve the smoothness of movement of the thrombus removal device in the blood vessel, which is not limited here.

[0068] In one embodiment, the support frame body 1000 includes a filter bolt frame connection element 2100a, and the distal ends of multiple filter bolt support rods 2100 are mutually bundled and connected through the filter bolt frame connection element 2100a, wherein the filter bolt frame connection element 2100a can be a hollow tube, or a solid metal sheet, etc., as long as it can be convenient to fix the distal ends of multiple filter bolt support rods 2100. In one embodiment, the support frame body 1000 includes a bolt cutting frame connection element 2200a, and the proximal ends of multiple bolt cutting support rods 2200 are mutually bundled and connected through the bolt cutting frame connection element 2200a. After the bolt cutting frame connection element 2200a bundles the multiple bolt cutting support rods 2200 at the proximal end, the bolt cutting frame connection element 2200a can also be used to form a connection with an external bolt pulling inner tube or bolt pulling wire or other bolt pulling component 100, and the bolt pulling operation is performed through the external bolt pulling inner tube or bolt pulling wire or other bolt pulling component 100.

[0069] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A thrombus removal device, characterized in that: The thrombus removal device comprises: A support frame body, wherein the support frame body has a deformation function and is used to adaptively shrink or expand according to the magnitude of the force applied to the support frame body; A filter plug structure, the filter plug structure is assembled on the supporting frame body, and is used to shrink and expand accordingly with the supporting frame body, the filter plug structure has a filter plug inner cavity and a filter plug capture port connected to the filter plug inner cavity, the filter plug capture port faces the proximal end, and a filter plug mesh hole connected to the filter plug inner cavity is formed on the surface of the filter plug structure, the filter plug mesh hole allows blood to pass through and prevents thrombus from passing through; A cutting bolt structure is provided on the supporting frame body, and the cutting bolt structure is located at the proximal end of the filter bolt structure.

2. The thrombus removal device according to claim 1, characterized in that: The filter plug structure is a membrane body, and the membrane body covers the support frame body, thereby constructing the filter plug inner cavity and the filter plug capture port, and the filter plug mesh is opened on the surface of the membrane body.

3. The thrombus removal device according to claim 2, characterized in that: The edge of the filter plug capture port is connected to the support frame body along the circumference of the support frame body, and is used to shrink or expand accordingly with the contraction or expansion of the support frame body; and / or, The outer contour size of the membrane body gradually decreases from the proximal end to the distal end; and / or, The membrane body is made of biocompatible material.

4. The thrombus removal device according to claim 1, characterized in that: The cutting bolt structure includes at least one group of annular cutting elements, at least one group of the annular cutting elements is arranged along the axial direction of the support frame body, each group of the annular cutting elements has multiple connection points along the annular circumference, and the multiple connection points are connected to multiple positions on the support frame body along the circumference of the support frame body.

5. The thrombus removal device according to claim 4, characterized in that: Each group of the annular cutting elements includes a plurality of V-shaped cutting pieces, and the plurality of V-shaped cutting pieces are sequentially connected end to end along the annular circumference to form the annular cutting element.

6. The thrombus removal device according to claim 1, characterized in that: At least a portion of the filter plug structure is located inside the frame of the supporting frame body; and / or, The cutting bolt structure is located inside the frame of the supporting frame body.

7. The thrombus removal device according to claim 1, characterized in that: The support frame body comprises: A filter plug frame region, on which the filter plug structure is assembled; A bolt cutting frame region, the distal end of which is connected to the proximal end of the filter frame region, and the bolt cutting structure is assembled on the bolt cutting frame region; The filter plug frame area and / or the cutting plug frame area have a guide unit section, and the outer contour size of the guide unit section of the filter plug frame area gradually decreases from the proximal end to the distal end, and the outer contour size of the guide unit section of the cutting plug frame area gradually decreases from the distal end to the proximal end.

8. The thrombus removal device according to claim 7, characterized in that: The filter plug frame area includes a plurality of filter plug support rods, the distal ends of the plurality of filter plug support rods are bundled and connected, and the proximal ends of the plurality of filter plug support rods are separated from each other; The bolt cutting frame area includes a plurality of bolt cutting support rods, the proximal ends of the plurality of bolt cutting support rods are clustered and connected, and the distal ends of the plurality of bolt cutting support rods are separated from each other, wherein the proximal end of the filter bolt support rod is connected to the distal end of the bolt cutting support rod.

9. The thrombus removal device according to claim 8, characterized in that: The filter plug support rod extends from the distal end to the proximal end; or, The filter plug support rod is spirally coiled along the filter plug frame area.

10. The thrombus removal device according to claim 8, characterized in that: The support frame body comprises: A filter plug frame connecting element, through which the distal ends of the plurality of filter plug support rods are mutually bundled and connected; and / or, The proximal ends of the plurality of the cutting bolt support rods are connected to each other in a cluster through the cutting bolt frame connecting element.

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