Thrombectomy device and thrombectomy system

Abstract

The embodiment of the present specification provides a thrombus removal device and a thrombus removal system, wherein the thrombus removal device comprises: a stripping portion, the cross-sectional projection perpendicular to the axis of the thrombus removal device is in the shape of a ring, and the edge of the stripping portion contacts the blood vessel wall, suitable for stripping the thrombus during the movement of the thrombus removal device from the distal end to the proximal end; a collecting portion, connected to the stripping portion, suitable for collecting and accommodating the stripped thrombus. The above scheme can completely separate the thrombus from the blood vessel wall and collect it efficiently, reduce the generation of fine thrombus during the thrombus removal process, and can remove chronic emboli that are firmly bonded to the blood vessel wall, so as to more effectively treat the thrombus in the blood vessel.

Description

Technical Field

[0001] The embodiments of the present specification relate to the field of medical device technology, and in particular to a thrombus removal device and a thrombus removal system. Background Art

[0002] Pulmonary embolism (PE) and deep venous thrombosis (DVT) are collectively referred to as venous thromboembolism (VTE). It is estimated that the incidence of VTE is the third most common vascular disease after acute coronary syndrome and stroke. Due to the lack of specific clinical manifestations, the misdiagnosis and missed diagnosis rates are high, and it has become an important cause of death among the population.

[0003] Anticoagulation is the basis for the treatment of thromboembolism, but the therapeutic effect of anticoagulation alone is not significant in some high-risk and medium-risk patients. Catheter interventional treatment has the advantages of less trauma, fewer complications, and shorter postoperative recovery time, and has become the main research direction at present.

[0004] Catheter interventional treatment mainly includes: catheter thrombolysis, aspiration thrombectomy, stent thrombectomy, etc. Among them: catheter thrombolysis refers to spraying drugs around the thrombus to dissolve the formed thrombus; aspiration thrombectomy refers to placing the catheter at the thrombus and aspirating the thrombus into the catheter; stent thrombectomy refers to placing the stent for thrombectomy at the site of the thrombus in a minimally invasive manner, then combining the stent and the thrombus together, and pulling the thrombus out of the blood vessel through the stent. Since stent thrombectomy has a good thrombus removal effect, it is often used in the treatment of vascular embolism.

[0005] However, due to the structure of the product itself, the existing stent thrombectomy method is easy to destroy the thrombus, thereby producing a small volume of thrombus. These small volume of thrombus will still remain in the blood vessels or flow into the lungs with the blood flow, causing the recurrence of thrombotic diseases and even pulmonary embolism. In addition, the existing stents are not effective in treating old thrombi, and cannot completely remove the hardened thrombi adhered to the blood vessel wall. The blood vessels are not completely unobstructed, which is easy to cause embolism again. Summary of the invention

[0006] In view of this, the embodiments of this specification provide a thrombus removal device and a thrombus removal system, which can completely separate the thrombus from the blood vessel wall and collect it efficiently, reduce the generation of fine thrombus during the thrombus removal process, and can remove chronic emboli that are firmly adhered to the blood vessel wall, so as to more effectively treat the thrombus in the blood vessel.

[0007] First, the embodiment of this specification provides a thrombus removal device, including:

[0008] The stripping portion has a cross-sectional projection perpendicular to the axial direction of the thrombus removal device in the shape of a ring, and the edge of the stripping portion contacts the blood vessel wall, and is suitable for stripping the thrombus when the thrombus removal device moves from the distal end to the proximal end;

[0009] The collecting part is connected to the stripping part and is suitable for collecting and accommodating the stripped thrombus. Optionally, the surface of the stripping part which is perpendicular to the axial direction of the thrombus removal device and faces the proximal end of the thrombus removal device is suitable for contacting the thrombus.

[0010] Optionally, the stripping portion includes a first stripping rod and a second stripping rod, and the first stripping rod and the second stripping rod are spirally intersected to form a ring structure.

[0011] Optionally, the first peeling rod and the second peeling rod are both provided with connecting components; the proximal end of the collecting part is fixedly connected to the first peeling rod and the second peeling rod through the connecting components.

[0012] Optionally, the collecting portion is a grid cylindrical structure formed by a flexible material / structure connected to the connecting member, and the distal end of the grid cylindrical structure is contracted into a cone shape.

[0013] Optionally, the flexible material / structure includes braided wires; the grid cylindrical structure is formed by braiding the braided wires, and the size of the grid formed by the braided wires gradually decreases from the proximal end to the distal end of the thrombus removal device.

[0014] Optionally, the connecting member comprises: a connecting hole;

[0015] The braided wire is passed through the connection hole and is directly connected to the braided wire of the collecting part.

[0016] Optionally, the connecting member comprises a connecting hole combination arranged along the extending direction of the first peeling bar and the second peeling bar, and the connecting hole combination comprises: a first connecting hole and a second connecting hole;

[0017] The braided wire includes: a braided wire combination corresponding to the connecting hole combination, and the braided wire combination includes: a first braided wire and a second braided wire, wherein: the first braided wire is passed through the first connecting hole, and the second braided wire is passed through the second connecting hole to form an interlaced structure and then woven with the first braided wire to form the collecting part.

[0018] Optionally, the connecting member comprises a connecting hole combination arranged in a direction perpendicular to the extending direction of the first peeling bar and the second peeling bar, and the connecting hole combination comprises: a third connecting hole and a fourth connecting hole;

[0019] The braided wire includes: a braided wire combination corresponding to the connecting hole combination, the braided wire combination includes: a third braided wire and a fourth braided wire, wherein: the third braided wire is passed through the third connecting hole, the fourth braided wire is passed through the fourth connecting hole, and the third braided wire and the fourth braided wire form an interlaced structure and then are woven to form the collecting part.

[0020] Optionally, the connecting member comprises a connection hole combination arranged opposite to each other along two sides of the extending direction of the first peeling bar and the second peeling bar, and the connection hole combination comprises: a first through hole and a second through hole;

[0021] The braided wire includes: a braided wire combination corresponding to the connecting hole combination, and the braided wire combination includes: a fifth braided wire and a sixth braided wire, wherein: the fifth braided wire is passed through the first through hole, and the sixth braided wire is passed through the second through hole, and after forming an interlaced structure, it is woven with the fifth braided wire to form the collecting part.

[0022] Optionally, the connecting member comprises a connecting hole combination arranged along the extending direction of the first peeling bar and the second peeling bar, and the connecting hole combination comprises: a fifth connecting hole and a sixth connecting hole;

[0023] The braided wire includes: a braided wire combination corresponding to the connecting hole combination, and the braided wire combination includes: a seventh braided wire and an eighth braided wire, wherein: the seventh braided wire passes through the fifth connecting hole from one side of the first stripping rod, and then passes through the sixth connecting hole on the other side of the first stripping rod; the eighth braided wire passes through the fifth connecting hole from one side of the second stripping rod, and then passes through the sixth connecting hole on the other side of the second stripping rod, and forms an interlaced structure with the seventh braided wire to weave into the collecting part.

[0024] Optionally, the thrombus removal device further comprises: a support rod assembly, a proximal end of which is connected to the distal end of the stripping portion, and a distal end of which is connected to the collecting portion.

[0025] Optionally, the support rod assembly includes: a first support rod and a second support rod, the distal ends of the first support rod and the second support rod are fixedly connected, and the proximal ends of the first support rod and the second support rod are respectively fixed at different positions of the stripping portion.

[0026] Optionally, the thrombus removal device further comprises: a connecting rod assembly, a proximal end of which is fixedly connected to the supporting rod assembly or the stripping portion, and a distal end of which is connected to the collecting portion.

[0027] Accordingly, the embodiment of the present specification also provides a thrombus removal system, including:

[0028] The thrombus removal device described in any of the aforementioned embodiments is suitable for removing a thrombus from a blood vessel;

[0029] The delivery device cooperates with the thrombus removal device and is suitable for accommodating, releasing and retrieving the thrombus removal device.

[0030] Optionally, the thrombus removal system further comprises a limiting device, adapted to limit the retraction degree of the thrombus removal device.

[0031] Optionally, the limiting device comprises: a limiting ring, located on the thrombus removal device;

[0032] The limiting block is located on the conveying device and is suitable for cooperating with the limiting ring to limit the retraction degree of the thrombus removal device during the process of retrieving the thrombus removal device.

[0033] In the thrombus removal device provided in the embodiment of the present specification, since the edge of the removal part can contact the blood vessel wall, and the cross-sectional projection perpendicular to the axis of the thrombus removal device is in the shape of a ring, during the movement of the thrombus removal device from the distal end to the proximal end, the stripping part can continuously strip the thrombus from the blood vessel instead of directly destroying the thrombus, thereby retaining the integrity of the thrombus to a greater extent. Even if the thrombus is divided into multiple thrombus fragments during the stripping process, these thrombus fragments are large in size and cannot flow away from the collecting part, thereby ensuring that there are no residual thrombus fragments in the blood vessel, thereby improving the one-time removal rate of the thrombus. Therefore, the thrombus removal device in the embodiment of the present specification can completely separate the thrombus from the blood vessel wall and collect it efficiently, reduce the generation of fine thrombi during the thrombus removal process, and can remove chronic emboli that are firmly bonded to the blood vessel wall, so as to more effectively treat the thrombus in the blood vessel.

[0034] Furthermore, the stripping portion is axially perpendicular to the thrombus removal device and the surface facing the proximal end of the thrombus removal device is suitable for contacting the thrombus. During the retraction of the thrombus removal device, only the stripping portion in contact with the blood vessel wall can contact the thrombus, thereby being able to completely strip the thrombus from the blood vessel wall instead of cutting the thrombus, thereby being able to remove the thrombus at one time and improving the treatment efficiency.

[0035] Furthermore, the stripping portion includes a first stripping rod and a second stripping rod, and the first stripping rod and the second stripping rod are spirally intersected to form an annular structure. Since there is no other structure inside the annular structure, during the retraction of the thrombus removal device, the edge of the annular structure can be closely attached to the blood vessel wall and move continuously to completely strip the thrombus from the blood vessel wall instead of cutting the thrombus, thereby ensuring that there are no residual thrombus fragments in the blood vessel; and the supporting force rigidity of the formed annular structure is relatively large, so that the annular structure can maintain a stable shape in the blood vessel, and can effectively strip away chronic thrombi adhered to the blood vessel wall.

[0036] Furthermore, since the collecting part is a grid-like cylindrical structure formed by a flexible material / structure connected to the connecting member, the thrombus removal device can have better flexibility and can be smoothly deployed in blood vessels of various special shapes, thereby improving the flexibility and universality of the thrombus removal device and causing less damage to the blood vessel wall.

[0037] Furthermore, the flexible material / structure includes braided wires; the grid cylindrical structure is formed by braided wires, and the grid size formed by the braided wires gradually decreases from the proximal end to the distal end of the thrombus removal device. During the withdrawal of the thrombus removal device, the thrombus can be wrapped in all directions, and the effect of collecting the thrombus is better.

[0038] Furthermore, the connecting component includes: a connecting hole; the braiding wire is passed through the connecting hole for direct weaving, and the connecting method is simple, which can improve the connection efficiency of the stripping part and the collecting part, and the perforation fixing effect is good, which can prevent the dislocation between the stripping part and the collecting part during the thrombus removal process, and the braiding wire is passed through the connecting hole for direct weaving, and the weaving method is simple, which can improve the weaving efficiency of the collecting part.

[0039] Furthermore, the connecting member includes a connection hole combination arranged along the extending direction of the first stripping rod and the second stripping rod, and the connection hole combination includes: a first connection hole and a second connection hole; the braided wire includes: a braided wire combination corresponding to the connection hole combination, and the braided wire combination includes: a first braided wire and a second braided wire, wherein: the first braided wire is inserted into the first connection hole, and the second braided wire is inserted into the second connection hole, and after forming an interlaced structure, it is woven with the first braided wire to form the collecting part. The above connection method can increase the connection area of ​​the braided wire with the collecting part, increase the density of the collecting part formed by weaving, reduce the probability of thrombus detachment from the thrombus removal device, and the perforation fixation effect is good, which can prevent the dislocation between the stripping part and the collecting part during the thrombus removal process.

[0040] Further, the connecting member includes a connection hole combination arranged along the extending direction of the first stripping rod and the second stripping rod, the connection hole combination includes: a fifth connection hole and a sixth connection hole; the braided wire includes: a braided wire combination corresponding to the connection hole combination, the braided wire combination includes: a seventh connection wire and an eighth connection wire, wherein: the seventh braided wire is inserted into the fifth connection hole from one side of the first stripping rod, and then inserted into the sixth connection hole from the other side of the first stripping rod; the eighth braided wire is inserted into the fifth connection hole from one side of the second stripping rod, and then inserted into the sixth connection hole from the other side of the second stripping rod, and after forming an interlaced structure with the seventh braided wire, it is woven to form the braided wire connection of the collection part. The above connection method can, on the one hand, increase the connection area of ​​the braided wire with the collection part and increase the density of the collection part formed by weaving; on the other hand, it can realize the smooth connection between the seventh connection wire and the eighth connection and the braided wire of the collection part, avoid the generation of gaps at the connection, further enhance the supporting force at the connection, and the perforation fixing effect is good, which can prevent the dislocation between the stripping part and the collection part during the thrombus removal process.

[0041] Furthermore, the thrombus removal device further comprises a support rod assembly, the proximal end of which is connected to the distal end of the stripping part, and the distal end of which is connected to the collecting part. The support rod assembly can provide support force for the stripping part, thereby improving the rigidity of the stripping part, so that the stripping part can still maintain a stable shape in the blood vessel, thereby improving the thrombus removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 This is a schematic diagram of the structure of a thrombus removal system in an embodiment of this specification;

[0044] Figure 2 This is a schematic diagram of the structure of a peeling portion in an embodiment of this specification;

[0045] Figure 3 It is a schematic diagram of a cross-sectional projection of a stripping portion perpendicular to the axial direction of the thrombus removal device in an embodiment of this specification;

[0046] Figure 4 This is a schematic diagram of a connection structure between a stripping portion and a collecting portion in an embodiment of this specification;

[0047] Figure 5This is a schematic diagram of another connection structure between the stripping part and the collecting part in the embodiment of this specification;

[0048] Figure 6 This is a schematic diagram of a braided wire being passed through a connecting member in an embodiment of this specification;

[0049] Figure 7 This is a schematic diagram of another braided wire being passed through a connecting member in an embodiment of this specification;

[0050] Figure 8 This is a schematic diagram of another braided wire being passed through a connecting member in an embodiment of this specification;

[0051] Fig. 9 This is a schematic diagram of another braided wire being passed through a connecting member in an embodiment of this specification;

[0052] Fig.10 This is a schematic diagram of another braided wire being passed through a connecting member in an embodiment of this specification;

[0053] Fig.11 This is a structural schematic diagram of a support rod assembly in an embodiment of this specification;

[0054] Fig.12 This is a schematic diagram of a connection structure of another stripping part and a collecting part in an embodiment of this specification;

[0055] Fig.13 for Figure 1 A partial enlarged view of

[0056] Fig.14 for Figure 1 Another partial enlarged view of;

[0057] Fig.15 This is a schematic diagram of the process of treating a thrombus in a blood vessel using a thrombectomy system according to an embodiment of the present specification. DETAILED DESCRIPTION

[0058] As described in the background technology, existing devices for processing thrombi tend to produce tiny thrombus chunks when they directly destroy thrombi. However, due to the structure of the device itself (for example, for some devices with larger gaps, smaller thrombus chunks will flow away with the blood; for another example, for some devices that are only configured to destroy thrombus volume, they do not have the ability to capture smaller thrombus chunks), these tiny object fragments cannot be further processed, so that these tiny thrombus chunks still remain in the blood vessels, leading to disease recurrence.

[0059] In order to solve the above problems, an embodiment of the present specification provides a thrombus removal device, which may include: a stripping portion, wherein the cross-sectional projection perpendicular to the axial direction of the thrombus removal device is in the shape of a circular ring, and the edge of the stripping portion is in contact with the blood vessel wall, and is suitable for stripping off the thrombus when the thrombus removal device moves from the distal end to the proximal end; a collecting portion, connected to the stripping portion, and suitable for collecting and accommodating the stripped thrombus.

[0060] When the thrombus removal device is in the blood vessel, since the edge of the stripping portion can contact the blood vessel wall, and the cross-sectional projection perpendicular to the axis of the thrombus removal device is in the shape of a ring, during the movement of the thrombus removal device from the distal end to the proximal end, the stripping portion can continuously strip the thrombus from the blood vessel instead of directly destroying the thrombus, thereby preserving the integrity of the thrombus to a greater extent. Even if the thrombus is divided into multiple thrombus fragments during the stripping process, these thrombus fragments are large in size and cannot flow away from the collecting portion, thereby ensuring that there are no residual thrombus fragments in the blood vessel, thereby improving the one-time removal rate of the thrombus. In addition, the stripping portion has high rigidity and can effectively strip the thrombus. Therefore, the thrombus removal device in the embodiment of this specification can completely separate the thrombus from the blood vessel wall and collect it efficiently, reduce the generation of fine thrombi during the thrombus removal process, and can remove chronic emboli that are firmly bonded to the blood vessel wall, thereby more effectively treating the thrombus in the blood vessel.

[0061] In order to enable those skilled in the art to better understand and implement the embodiments of the present invention, the concepts, schemes, principles and advantages of the embodiments of this specification are described in detail below with reference to the drawings and through specific application examples.

[0062] For ease of description and understanding, in the embodiments of this specification, the proximal end and the distal end are first described, wherein the "proximal end" refers to the end close to the operator during thrombus removal, and the "distal end" refers to the end away from the operator during thrombus removal.

[0063] Reference Figure 1 The schematic diagram of the structure of a thrombus removal system in the embodiment of the present specification is shown in FIG. In some embodiments of the present specification, such as Figure 1 As shown, the thrombus removal system may include a thrombus removal device 110, and the thrombus removal device 110 may include: a stripping portion 111 and a collecting portion 112, wherein:

[0064] The stripping portion 111 has a cross-sectional projection perpendicular to the axial direction of the thrombus removal device 110 in a circular ring shape, and the edge of the stripping portion 111 is in contact with the blood vessel wall ( Figure 1 Not shown) contact, suitable for stripping the thrombus during the movement of the thrombus removal device 110 from the distal end to the proximal direction ( Figure 1 not shown);

[0065] The collecting part 112 is connected to the stripping part 111 and is suitable for collecting and accommodating the stripped thrombus. When the thrombus removal device 110 is fully deployed in the blood vessel, the edge of the stripping part 111 can contact the blood vessel wall, and the stripping part 111 can be projected into a circular ring shape in a cross section perpendicular to the axial direction of the thrombus removal device 110. During the movement of the thrombus removal device 110 from the distal end to the proximal end, the stripping part 111 can continuously strip the thrombus from the blood vessel instead of directly destroying the thrombus, thereby preserving the integrity of the thrombus to a greater extent. Even if the thrombus is divided into multiple thrombus fragments during the stripping process, these thrombus fragments are large in size and cannot flow away from the collecting part 112, thereby ensuring that there are no residual thrombus fragments in the blood vessel, thereby improving the one-time removal rate of the thrombus.

[0066] Therefore, by using the above-mentioned thrombus removal device, the thrombus can be completely separated from the blood vessel wall and collected efficiently, reducing the generation of fine thrombi during the thrombus removal process, and can remove chronic emboli that are firmly adhered to the blood vessel wall, thereby more effectively treating thrombi in the blood vessels.

[0067] In order to enable those skilled in the art to better understand and implement the embodiments of the present invention, some specific examples are given below for the specific implementation of the thrombus removal device in the embodiments of this specification.

[0068] In some embodiments of the present specification, the stripping portion serves to separate the thrombus from the blood vessel wall. To avoid damaging the thrombus, during the process of removing the thrombus, the surface of the stripping portion that is perpendicular to the axis of the thrombus removal device and faces the proximal end of the thrombus removal device can contact the thrombus. In other words, during the withdrawal of the thrombus removal device, the stripping portion that contacts the blood vessel wall can contact the thrombus, thereby completely stripping the thrombus from the blood vessel wall instead of cutting the thrombus, thereby removing the thrombus at one time and improving the treatment efficiency.

[0069] In the specific implementation, refer to Figure 2 The stripping portion 20 may include a first stripping rod 21 and a second stripping rod 22 , and the first stripping rod 21 and the second stripping rod 22 are spirally intersected to form a ring structure.

[0070] like Figure 2 As shown, since there is no other structure inside the annular structure, during the withdrawal of the thrombus removal device, the edge of the annular structure can move continuously and closely against the blood vessel wall, completely peeling off the thrombus from the blood vessel wall instead of cutting the thrombus, which can ensure that there are no residual thrombus fragments in the blood vessel. And by spirally intersecting the first stripping rod and the second stripping rod, the supporting force rigidity of the formed annular structure can be improved, so that the annular structure can maintain a stable shape in the blood vessel and effectively peel off the chronic thrombus adhered to the blood vessel wall.

[0071] In some embodiments of the present specification, when the first stripping rod and the second stripping rod are spirally intertwined to form a ring structure and are fully deployed in the blood vessel, Figure 3 As shown, the annular structure is projected into a circular ring shape O in a cross section perpendicular to the axial direction of the thrombus removal device. During the withdrawal process, the edge of the circular ring shape O can be closely attached to the blood vessel wall to peel off the thrombus from the blood vessel wall. In addition, the circular ring shape fits the shape of the blood vessel, which can avoid damage to the blood vessel wall.

[0072] It is understandable that the structure of the stripping portion is only an example. In a specific embodiment, the stripping portion may be expanded or deformed, or may be directly formed as one piece using a stripping process; or, for example, the first stripping rod and the second stripping rod may be spirally intersected to form an elliptical shape, which is not limited in the embodiments of this specification.

[0073] In a specific embodiment, the first peeling bar and the second peeling bar are both provided with a connecting member. Figure 2 As described above, the first peeling bar 21 is provided with a connecting member 231 , and the second peeling bar 22 is provided with connecting members 232 , 233 and 234 .

[0074] Accordingly, the proximal end of the collecting portion is fixedly connected to the first peeling bar and the second peeling bar through the connecting member. For example, the proximal end of the collecting portion can be fixedly connected to the first peeling bar 21 through the connecting member 231, and connected to the second peeling bar 234 through the connecting members 232, 233 and 234, thereby realizing the connection between the peeling portion and the collecting portion.

[0075] In the embodiments of the present specification, the thrombus removal device may have different configurations based on the number of connecting members and their distribution on the first peeling bar and the second peeling bar.

[0076] As an example, combining Figure 2 , refer to Figure 4 Sub-figures (a) and (b) show a schematic diagram of the connection relationship between a stripping portion and a collecting portion in an embodiment of the present specification, wherein sub-figures (a) and (b) are schematic diagrams of the connection relationship of the thrombectomy device from different perspectives.

[0077] like Figure 4 As shown in Figures (a) and (b), the entire area of ​​the first stripping rod 21 and the second stripping rod 22 is provided with a connecting member (such as Figure 4The connecting members 21-1, 21-2, 21-3 and 21-4 on the first peeling rod 21; the connecting members 22-1, 22-2, 22-3 and 22-4 on the second peeling rod 22 are shown, and the proximal end of the collecting portion 2A can be connected to the entire area of ​​the first peeling rod 21 and the second peeling rod 22 through the connecting members, that is, all areas of the annular structure can be connected to the collecting portion 2A.

[0078] As another example, combining Figure 2 , refer to Figure 5 Another schematic diagram of the connection structure between the stripping part and the collecting part in the embodiment of this specification is shown in FIG. Figure 5 As shown in the neutron diagrams (a) and (b), Figure 4 The difference is that the connecting members are only distributed in the area near the distal ends of the first peeling bar 21 and the second peeling bar 22, and the number of the connecting members is relatively small. Figure 5 The connecting members 21-1 and 21-2 shown in the figure are distributed in the area near the distal end of the first peeling rod 21, and the proximal end of the collecting part 2A is only connected to the distal areas of the first peeling rod 21 and the second peeling rod 22, that is, part of the annular structure is connected to the collecting part 2A.

[0079] It should be noted that the above-mentioned figures are only examples and do not represent the actual distribution positions of the connecting components on the first peeling rod or the second peeling rod. They are only used to illustrate that the collecting part can be fixedly connected to the first peeling rod and the second peeling rod through the connecting components. The number of connecting components is also an example. In specific implementations, the number of connecting components on the first peeling rod and the second peeling rod can be flexibly set according to actual needs, and the embodiments of this specification do not limit this.

[0080] In a specific implementation, in order to reduce damage to the blood vessel wall and improve the flexibility of the thrombus removal device in a special-shaped blood vessel, the thrombus removal device may be flexible, that is, the thrombus removal device may be made of a flexible material / structure. The flexible material / structure may include metal materials and / or polymer materials; the manufacturing method may include at least one of weaving, laser cutting and three-dimensional printing (3D Printing, 3DP).

[0081] In a specific implementation, the peeling portion may be made of a shape memory alloy. More specifically, the peeling portion may be formed by laser cutting the shape memory alloy.

[0082] The collecting part of the thrombectomy device can be made of flexible material / structure, so that the thrombectomy device has better flexibility and can be smoothly deployed in blood vessels of various special shapes, thereby improving the flexibility and universality of the thrombectomy device and causing less damage to the blood vessel wall.

[0083] For example, Figure 5 and Figure 4 As shown, the collecting portion 2A may be a grid cylindrical structure formed by a flexible material / structure connected to the connecting member, wherein the distal end of the grid cylindrical structure is contracted into a cone shape.

[0084] Specifically, the flexible material / structure may include braided wires; the mesh cylindrical structure is formed by braiding the braided wires, and the mesh size formed by the braided wires gradually decreases from the proximal end to the distal end of the thrombus removal device. On the one hand, the collection part woven by the braided wires has good flexibility and less damage to the blood vessel wall; on the other hand, by making the mesh size gradually decrease from the proximal end to the distal end of the thrombus removal device, the thrombus can be fully wrapped during the withdrawal of the thrombus removal device, and the effect of collecting the thrombus is better.

[0085] Among them, the type and thickness of the braided wire can be selected according to the specific scene and needs. For example, the braided wire can be a metal wire and / or a polymer wire, and its thickness can range from 0.1 millimeter (mm) to 0.4 millimeter (mm). Furthermore, the polymer can be a nickel-titanium (NiTi) alloy wire. The embodiment of this specification does not specifically limit the type and thickness of the braided wire.

[0086] It can be understood that the mesh size of the mesh tube structure formed by the braided wires can change in size from the proximal end to the distal end of the thrombus removal device for other situations. For example, the mesh size of the mesh tube structure can gradually decrease from the proximal end to the distal end of the thrombus removal device, but when the mesh size is reduced to a certain value, the mesh size no longer changes, that is, the mesh size of the mesh tube structure near the distal end remains the same; for another example, the mesh size of the mesh tube structure changes alternately in size from the proximal end to the distal end of the thrombus removal device, that is, the hollow size changes from small to large, and then from large to small, but overall, the mesh size at the distal end is still the smallest.

[0087] In order to enable those skilled in the art to more clearly understand and implement the connection method of the stripping part and the collecting part through the connecting part in the embodiment of this specification, the following is a schematic description through specific examples with reference to the accompanying drawings.

[0088] Reference Figure 6 The schematic diagram of a braided wire being inserted into a connecting member in an embodiment of the present specification is shown in FIG. Figure 6 As shown, the connecting member may include: connecting holes K, and the connecting holes K may be distributed on the first peeling rod and the second peeling rod, such as Figure 6 The connecting hole K shown can be provided on the first stripping rod G; after the braiding wire S is passed through the connecting hole K, it can be directly woven to form the collecting portion (not shown in FIG. 5 ).

[0089] The above-mentioned connection method has a simple connection mode, can improve the connection efficiency of the stripping part and the collecting part, and has a good perforation fixing effect, can prevent the dislocation between the stripping part and the collecting part during the thrombus removal process, and the braiding wire is passed through the connecting hole and directly weaving is performed, the weaving method is simple, and can improve the weaving efficiency of the collecting part.

[0090] It should be noted that Figure 6 The braided wire S includes two strands of wire for illustration. In other examples, the braided wire may include other strands of wire. For example, the braided wire S may include one strand of wire, or three strands of wire, etc. Figure 6 Only one connection hole K on the first peeling rod G is illustrated. In actual application scenarios, multiple connection holes can be set on the first peeling rod G. The embodiments of this specification do not limit the specific number of connection holes. Correspondingly, the second peeling rod can adopt the same structure as the first peeling rod G, which will not be elaborated here.

[0091] For example, refer to Figure 7 Another schematic diagram of a braided wire being inserted into a connecting member in an embodiment of the present specification is shown in FIG. Figure 7 As shown, the connecting member may include a first peeling bar G and a second peeling bar ( Figure 7 A connection hole combination (not shown) is arranged in an extending direction, and the connection hole combination may include: a first connection hole K1 and a second connection hole K2; the braided wire may include: a braided wire combination corresponding to the connection hole combination, and the braided wire combination may include: a first braided wire S1 and a second braided wire S2, wherein: the first braided wire S1 can be passed through the first connection hole K1, and the second braided wire S2 can be passed through the second connection hole K2, and after forming an interlaced structure, they are woven with the first braided wire S1 to form the collecting part.

[0092] By adopting the connection method in the above example, the first braided wire is passed through the first connecting hole, and the second connecting wire is passed through the second connecting hole to form an interlaced structure and then woven with the first braided wire, the connection area with the collecting part can be increased, and after the interlaced structure is formed, the density of the collecting part formed by weaving is larger, which can reduce the probability of thrombus detachment from the thrombus removal device.

[0093] For example, refer to Figure 8 Schematic diagram of another embodiment of the present specification in which a braided wire is inserted into a connecting member, as shown in FIG. Figure 8 As shown, the connecting member may include a first peeling bar G and a second peeling bar ( Figure 8A connection hole combination is arranged in a direction perpendicular to the extension direction (not shown), and the connection hole combination may include: a third connection hole K3 and a fourth connection hole K4; the braided wire may include: a braided wire combination corresponding to the connection hole combination, and the braided wire combination may include: a third braided wire S3 and a fourth braided wire S4, wherein: the braided connection wire S3 can be passed through the third connection hole K3, and the fourth braided wire S4 can be passed through the fourth connection hole K4, and the third braided wire S3 and the fourth braided wire S4 form an interlaced structure and then are woven to form the collecting part.

[0094] By adopting the connection method in the above example, after the third braided wire is passed through the third connecting hole and the fourth braided wire is passed through the fourth connecting hole, the third braided wire and the fourth braided wire are formed into an interlaced structure and then weaved. This can increase the connection area with the collecting part, increase the density of the collecting part formed by weaving, and reduce the probability of thrombus detaching from the thrombus removal device. The perforation fixing effect is good, and can prevent misalignment between the stripping part and the collecting part during the thrombus removal process.

[0095] It should be noted that Figure 8 and Figure 7 The description is made by taking a connection hole combination set on the first peeling rod as an example. In a specific implementation, multiple connection hole combinations can be set on the first peeling rod, and each connection hole combination can include 3 connection holes, 4 connection holes, or more connection holes. Correspondingly, the second peeling rod can adopt the same structure as the first peeling rod, which will not be elaborated here.

[0096] For example, refer to Fig. 9 Another schematic diagram of a braided wire being inserted into a connecting member in an embodiment of the present specification is shown in FIG. Fig. 9 As shown, the connecting member includes a first peeling bar G and a second peeling bar ( Fig. 9 The connecting hole combination is arranged opposite to each other on both sides of the extending direction of the connecting hole combination (not shown), and the connecting hole combination may include: a first through hole T1 and a second through hole ( Fig. 9 Not shown); the braided wire may include: a braided wire combination corresponding to the connecting hole combination, the braided wire combination including: a fifth braided wire S5 and a sixth braided wire S6, wherein: the fifth braided wire S5 is passed through the first through hole T1, the sixth braided wire S6 is passed through the second through hole, and after forming an interlaced structure, it is woven with the fifth braided wire S5 to form the collecting part.

[0097] By adopting the connection method in the above example, after the fifth braided wire is passed through the first through hole and the sixth connecting wire is passed through the second through hole to form an interlaced structure and then woven with the fifth braided wire, the connection area with the collecting part can be increased, the density of the finally formed collecting part can be increased, and the probability of thrombus detaching from the thrombus removal device can be reduced.

[0098] It is understandable that the solutions in the above-mentioned embodiments can be combined and cross-referenced with each other without conflict, thereby extending a variety of possible implementation plans, which can all be considered as embodiment solutions disclosed and open in the embodiments of this specification, and the embodiments of this specification do not limit these extended solutions.

[0099] In some embodiments of this specification, reference is made to Fig.10 Schematic diagram of another embodiment of the present specification in which a braided wire is inserted into a connecting member, as shown in FIG. Fig.10 As shown, the connecting member may include a connecting hole combination arranged along the extension direction of the first stripping rod G1 and the second stripping rod G2, and the connecting hole combination may include: a fifth connecting hole and a sixth connecting hole, for example, the connecting hole combination may include a fifth connecting hole K51 and a sixth connecting hole K61 arranged in the extension direction of the first stripping rod G1, and a fifth connecting hole K52 and a sixth connecting hole K62 arranged in the extension direction of the second stripping rod G2; the braided wire may include: a braided wire combination corresponding to the connecting hole combination, and the braided wire combination may include: a seventh braided wire S7 and an eighth braided wire S8, wherein: the seventh braided wire S7 can pass through the fifth connecting hole K51 from one side of the first stripping rod G1, and then pass through the sixth connecting hole K61 on the other side of the first stripping rod G1; the eighth braided wire S8 can pass through the fifth connecting hole K52 from one side of the second stripping rod G2, and then pass through the sixth connecting hole K62 on the other side of the second stripping rod G2, and form an interlaced structure with the seventh connecting wire S7 and then weave to form the collecting part.

[0100] By adopting the connection method in the above example, after the seventh braided wire passes through the other side of the first stripping rod and the eighth braided wire passes through the other side of the second stripping rod, the seventh braided wire and the eighth braided wire are formed into an interlaced structure and then weaved together, a smooth connection between the seventh braided wire and the eighth braided wire and the corresponding stripping rod can be achieved, avoiding gaps at the connection, further enhancing the supporting force of the connection, and the perforation fixing effect is good, which can prevent misalignment between the stripping part and the collecting part during thrombus removal.

[0101] In a specific implementation, when the thrombus removal device is fully deployed, it may be impacted by the blood in the blood vessel, and its shape may change, thereby affecting the thrombus removal effect. Based on this, the thrombus removal device may further include: a support rod assembly, whose proximal end is connected to the distal end of the stripping part, and whose distal end is connected to the collecting part. The support rod assembly can provide support force for the stripping ring, thereby improving the rigidity of the stripping part, so that the stripping part can still maintain a stable shape in the blood vessel, thereby improving the thrombus removal effect.

[0102] In this embodiment, if Fig.11As shown, the proximal end of the support rod assembly 40 is connected to the first peeling rod 4A and the second peeling rod 4B, wherein the support rod assembly 40 may include: a first support rod 41 and a second support rod 42, the distal ends of the first support rod 41 and the second support rod 42 are fixedly connected, and the proximal ends of the first support rod 41 and the second support rod 42 are respectively fixed at different positions of the peeling portion. Fig.11 As shown, the proximal end of the first support rod 41 can be fixed on the first peeling rod 4A, and the proximal end of the second support rod 42 can be fixed on the second peeling rod 42 .

[0103] In the specific implementation, continue to refer to Fig.11 When more support rod assemblies 40 are provided on the thrombus removal device, the support rod assemblies 40 can form a diamond mesh structure with the first stripping rod 41 and the second stripping rod 42. The formed diamond mesh structure is stable and can improve the rigidity of the first stripping rod 41 and the second stripping rod 42.

[0104] In some embodiments of the present specification, a plurality of connection holes may be provided on the first support rod and the second support rod, and the proximal end of the collecting part may be connected to the stripping part through the connection holes. Fig.12 Another schematic diagram of the connection structure between the stripping part and the collecting part in the embodiment of this specification is shown in FIG. Fig.12 The thrombus removal device may include two support rod assemblies 53 and 54 fixedly connected to the distal ends of the first stripping rod 51 and the second stripping rod 52, wherein the support rod assembly 53 may include a first support rod assembly 531 and a second support rod assembly 532, the distal ends of the first support rod 531 and the second support rod assembly 532 are fixedly connected, and a connecting hole C1 is provided; the support rod assembly 54 may include a first support rod assembly 541 and a second support rod assembly 542, the distal ends of the first support rod 541 and the second support rod assembly 542 are fixedly connected, and a connecting hole C2 is provided.

[0105] The braided wires of the collecting part 5A can be fixedly connected to the support rod assembly 53 through the connecting hole C1, and fixedly connected to the support rod assembly 54 through the connecting hole C2, and then each braided wire can be braided. The specific braiding process can be referred to in the above Figures 7 to 10 Related description in .

[0106] Understandably, Fig.12 The description is made by taking the example that the thrombus removal device includes two support rod assemblies. In a specific implementation, more support rod assemblies may be provided to further improve the rigidity of the stripping portion.

[0107] Further, in order to increase the weaving density of the collection part, continue to refer to Fig.12In some embodiments of the present specification, the thrombus removal device may further include connecting rod assemblies 55 and 56, wherein the proximal end of the connecting rod assembly 55 is fixedly connected to the support rod assembly 53 or the stripping portion (specifically, the first stripping rod 51), and the distal end thereof is connected to the collecting portion 5A, and the proximal end of the connecting rod assembly 56 is fixedly connected to the support rod assembly 54 or the stripping portion (specifically, the second stripping rod 52), and the distal end thereof is connected to the collecting portion 5A.

[0108] In a specific implementation, the distal ends of the connecting rod assemblies 55 and 56 may be provided with connecting holes. For example, the connecting rod assembly 55 may be provided with a connecting hole C3, and the connecting rod assembly 56 may be provided with a connecting hole C4. The braided wire of the collecting part 5A may be fixedly connected to the connecting rod assembly 55 through the connecting hole C3, and may be fixedly connected to the connecting rod assembly 56 through the connecting hole C4.

[0109] It should be noted that Fig.12 The example in which the connecting part includes two connecting rods is used for explanation. In a specific implementation, more connecting rods may be provided to increase the number of connecting holes and improve the density of the collecting part formed by weaving.

[0110] It is understandable that, in a specific implementation, when the thrombus removal device includes a stripping portion, a support rod assembly, and a connecting rod assembly at the same time, the collecting portion may be fixedly connected to at least one, for example, the collecting portion may be fixedly connected to only one of the stripping portion, the support rod assembly, and the connecting rod assembly; the collecting portion may be fixedly connected to two of the stripping portion, the support rod assembly, and the connecting rod assembly, for example, the collecting portion may be fixedly connected to the stripping portion and the support rod assembly at the same time, and for another example, the collecting portion may be fixedly connected to the stripping portion, the support rod assembly, and the connecting rod assembly at the same time. The embodiments of this specification do not limit this, as long as a fixed connection with the collecting portion can be achieved.

[0111] This specification also provides a thrombus removal system corresponding to the thrombus removal device described in any of the above embodiments, which is introduced below. It should be noted that the content of the thrombus removal device described below can be referenced to the content of the thrombus removal device described above.

[0112] In the specific implementation, continue to refer to Figure 1 The thrombus removal system 100 provided in the embodiment of the present specification may include: the thrombus removal device 110 and the delivery device 120 described in any of the above embodiments, wherein:

[0113] The thrombus removal device 110 is suitable for removing thrombus in a blood vessel;

[0114] The delivery device 120 cooperates with the thrombus removal device and is suitable for accommodating, releasing and retrieving the thrombus removal device 110 .

[0115] Among them, the specific contents such as the structure, connection relationship, function, working principle, etc. of the thrombus removal device can be referred to the description and drawings of the above relevant parts, and will not be repeated here.

[0116] In a specific implementation, the components of the conveying device can be set according to specific application scenarios and requirements, and the embodiments of this specification do not limit this.

[0117] In a specific application scenario, combined with Figure 1 , refer to Fig.13 and Fig.14 ,in, Fig.13 and Fig.14 for Figure 1 The delivery device 120 may include a core shaft tube A, an inner tube B and an outer tube C, wherein:

[0118] The core shaft tube A is connected to the distal end of the thrombus removal device 110 and is suitable for retrieving the thrombus removal device 110;

[0119] The inner tube B is connected to the proximal end of the thrombus removal device 110 and is suitable for guiding the moving direction of the thrombus removal device 110;

[0120] The outer tube C is sleeved on the inner tube B and the core shaft tube A, and is suitable for accommodating the thrombus removal device 110 .

[0121] In some embodiments of this specification, continue to refer to Fig.13 and Fig.14 The thrombus removal system 100 may further include a first fixing device 130 , which may be a fixing ring, through which the inner tube B can be connected to the proximal end of the thrombus removal device 110 .

[0122] The thrombus removal system 100 may further include a second fixing device 140 . The second fixing device 140 may be a conical head. The core shaft tube A may be connected to the distal end of the thrombus removal device 110 through the conical head.

[0123] In order to enable those skilled in the art to more clearly understand and implement the thrombus removal system provided in the embodiments of this specification, the following is a schematic description through specific examples with reference to the accompanying drawings.

[0124] In an optional example, if Fig.15 The figure shows a process diagram of a thrombus removal system provided in an embodiment of the present specification for treating a thrombus in a blood vessel.

[0125] Reference Fig.15In sub-figure (a), the delivery device 120 is inserted into the blood vessel XG where the thrombus XS needs to be removed. When the delivery device 120 passes through the thrombus XS for a certain distance (the distance is determined according to specific needs and the volume of the thrombus), the outer tube C is withdrawn, and at the same time, the inner tube B and the core shaft tube A are pushed toward the distal end of the thrombus XS. The thrombus removal device 110 automatically unfolds in the blood vessel XG, and the unfolded thrombus removal device 110 adheres to the inner wall of the blood vessel XG.

[0126] Reference Fig.15 In sub-figure (b), when the thrombus removal device 110 is fully deployed, the inner tube B, the connecting tube and the core shaft tube A are withdrawn, driving the thrombus removal device 110 to move proximally. During the movement, the thrombus removal device 110 is closely attached to the blood vessel wall and peels the thrombus XS off the blood vessel wall.

[0127] Reference Fig.15 In sub-figure (c), the inner tube B, the connecting tube and the core shaft tube A are continuously withdrawn, and the thrombus XS is kept in the collecting part of the thrombus removal device 110. The thrombus removal device 110 is closely attached to the inner wall of the blood vessel XG to prevent the thrombus XS from flowing out from the distal end.

[0128] Reference Fig.15 In sub-figure (d), during the withdrawal process, the structures at the proximal end of the thrombus removal device 110 gradually gather together, and the thrombus XS is compressed and lengthened, following the thrombus removal device 110 into the sheath D.

[0129] In a specific implementation, in order to determine the position of the thrombectomy device in the blood vessel, the thrombectomy device can be positioned by angiography, for example, a positioning component can be provided at the proximal end of the core shaft tube A. By angiography, the position of the thrombectomy device in the blood vessel can be accurately determined, thereby ensuring that the thrombus is within the spatial range after the thrombectomy device is deployed.

[0130] In the embodiment of the present specification, in order to prevent the thrombus from rupturing due to excessive contraction of the thrombus removal device, the thrombus removal system provided in the embodiment of the present specification may also include a limiting device, which is suitable for limiting the retraction degree of the thrombus removal device.

[0131] As a specific example, continue to refer to Fig.13 and Fig.14 , the limiting device may include: a limiting ring D, located on the thrombus removal device 110;

[0132] The limiting block E is located on the conveying device 120 and is adapted to cooperate with the limiting ring D to limit the retraction degree of the thrombus removal device 110 during the process of retrieving the thrombus removal device 110 .

[0133] Specifically, the limit block E can be located on the core shaft tube A. When the thrombus removal device 110 is recovered, the core shaft tube A moves toward the proximal end, thereby driving the limit ring D to move toward the proximal end. When the limit ring D is engaged with the limit block E, the core shaft tube A stops moving and the thrombus removal device 110 no longer retracts.

[0134] In specific implementations, according to actual application scenarios and requirements, the thrombectomy system in the embodiments of this specification can be further expanded to further improve the thrombectomy effect.

[0135] For example, continue to refer to Fig.15 The thrombus removal system 100 may further include a suction device 10A connected to the delivery device 120. When the thrombus removal device 110 completely enters the sheath F, the thrombus remaining in the sheath F may be sucked out by the suction device 10A (eg, a syringe).

[0136] It should be noted that, in the description of this specification, unless otherwise clearly specified and limited, the terms in this specification can be understood according to different application scenarios. For example, the verb "connect" can be understood as fixed connection, detachable connection, rotation connection, integral connection, etc.; for another example, the verb "expand" can be understood as expansion, stretching, etc. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0137] It should be noted that, in the description of this specification, the terms "first", "second", "third", etc. are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined by the terms "first", "second", "third", etc. may explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second", "third", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or express importance. It is understood that the terms used in this way can be interchangeable where appropriate.

[0138] Although the embodiments of this specification are disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A thrombus removal device, characterized in that: include: The stripping portion, the cross-sectional projection perpendicular to the axial direction of the thrombus removal device is in the shape of a ring, and the edge of the stripping portion contacts the blood vessel wall, and is suitable for stripping the thrombus when the thrombus removal device moves from the distal end to the proximal end; wherein the stripping portion includes a first stripping rod and a second stripping rod, and the first stripping rod and the second stripping rod are both provided with a connecting member; A plurality of connecting rods, the proximal ends of the connecting rods are connected to the stripping portion, and the distal ends of the plurality of connecting rods are respectively provided with connecting holes; The collecting part has a proximal end fixedly connected to the connecting members on the first stripping rod and the second stripping rod of the stripping part, and fixedly connected to the connecting hole of the connecting rod, and is suitable for collecting and accommodating the stripped thrombus.

2. The thrombus removal device according to claim 1, characterized in that: The stripping portion is perpendicular to the axial direction of the thrombus removal device and the surface thereof facing the proximal end of the thrombus removal device is suitable for contacting the thrombus.

3. The thrombus removal device according to claim 1, characterized in that: The first stripping rod and the second stripping rod are spirally intersected to form an annular structure.

4. The thrombus removal device according to claim 3, characterized in that: The collecting portion is a grid cylindrical structure formed by a flexible material / structure connected to the connecting member, and the distal end of the grid cylindrical structure is folded into a cone shape.

5. The thrombus removal device according to claim 4, characterized in that: The flexible material / structure comprises braided wire; The grid cylindrical structure is formed by weaving braided wires, and the size of the grid formed by the braided wires gradually decreases from the proximal end to the distal end of the thrombus removal device.

6. The thrombus removal device according to claim 5, characterized in that: The connecting member comprises: a connecting hole; The braided wire is passed through the connection hole and then directly braided to form the collecting portion.

7. The thrombus removal device according to claim 5, characterized in that: The connecting member comprises a connecting hole combination arranged along the extending direction of the first peeling bar and the second peeling bar, and the connecting hole combination comprises: a first connecting hole and a second connecting hole; The braided wire includes: a braided wire combination corresponding to the connecting hole combination, and the braided wire combination includes: a first braided wire and a second braided wire, wherein: the first braided wire is passed through the first connecting hole, and the second braided wire is passed through the second connecting hole to form an interlaced structure and then woven with the first braided wire to form the collecting part.

8. The thrombus removal device according to claim 5, characterized in that: The connecting member comprises a connecting hole combination arranged in a direction perpendicular to the extending direction of the first peeling bar and the second peeling bar, the connecting hole combination comprises: a third connecting hole and a fourth connecting hole; The braided wire includes: a braided wire combination corresponding to the connecting hole combination, the braided wire combination includes: a third braided wire and a fourth braided wire, wherein: the third braided wire is inserted into the third connecting hole, the fourth braided wire is inserted into the fourth connecting hole, and the third braided wire and the fourth braided wire form an interlaced structure and then are woven to form the collecting part.

9. The thrombus removal device according to claim 5, characterized in that: The connecting member comprises a connecting hole combination arranged opposite to each other along the extending direction of the first peeling bar and the second peeling bar, wherein the connecting hole combination comprises: a first through hole and a second through hole; The braided wire includes: a braided wire combination corresponding to the connecting hole combination, and the braided wire combination includes: a fifth braided wire and a sixth braided wire, wherein: the fifth braided wire is passed through the first through hole, and the sixth braided wire is passed through the second through hole, and after forming an interlaced structure, it is woven with the fifth braided wire to form the collecting part.

10. The thrombus removal device according to claim 5, characterized in that: The connecting member comprises a connecting hole combination arranged along the extending direction of the first peeling bar and the second peeling bar, and the connecting hole combination comprises: a fifth connecting hole and a sixth connecting hole; The braided wire includes: a braided wire combination corresponding to the connecting hole combination, the braided wire combination includes: a seventh braided wire and an eighth braided wire, wherein: the seventh braided wire passes through the fifth connecting hole from one side of the first stripping rod, and then passes through the sixth connecting hole on the other side of the first stripping rod; the eighth braided wire passes through the fifth connecting hole from one side of the second stripping rod, and then passes through the sixth connecting hole on the other side of the second stripping rod, and forms an interlaced structure with the seventh braided wire and then weaves to form the collecting part.

11. The thrombus removal device according to any one of claims 1 to 10, characterized in that: Also includes: A support rod assembly has a proximal end connected to the distal end of the stripping portion, and a distal end connected to the collecting portion.

12. The thrombus removal device according to claim 11, characterized in that: The support rod assembly includes: a first support rod and a second support rod, the distal ends of the first support rod and the second support rod are fixedly connected, and the proximal ends of the first support rod and the second support rod are respectively fixed at different positions of the stripping portion.

13. A thrombus removal system, characterized in that: include: The thrombus removal device according to any one of claims 1 to 12, suitable for removing a thrombus in a blood vessel; The delivery device cooperates with the thrombus removal device and is suitable for accommodating, releasing and retrieving the thrombus removal device.

14. The thrombus removal system according to claim 13, characterized in that: It also includes a limiting device, which is suitable for limiting the retraction degree of the thrombus removal device.

15. The thrombus removal system according to claim 14, characterized in that: The limiting device comprises: A limiting ring, located on the thrombus removal device; The limiting block is located on the conveying device and is suitable for cooperating with the limiting ring to limit the retraction degree of the thrombus removal device during the process of retrieving the thrombus removal device.

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