Thrombectomy device and system

Abstract

The application provides a thrombus crushing device and a thrombus removing system. The thrombus crushing device comprises a thrombus crushing unit and a separation unit. The separation unit is connected with the proximal end of the thrombus removing head, and part of the separation unit is located between the transmission pipe and the thrombus crushing knife to shield part of the opening. The separation unit plays a role of blocking the blood vessel wall. That is, the separation unit can block the blood vessel wall and the venous valve from entering the thrombus removing head during the thrombus removing process, thereby reducing the damage. Moreover, the separation unit can separate the mural thrombus from the blood vessel wall while blocking the blood vessel wall during the thrombus removing process, thereby increasing the removing efficiency of the mural thrombus and improving the thrombus removing effect. In addition, the thrombus crushing knife, the separation unit and the thrombus removing head form a multi-layer cutting structure during the thrombus removing process, so that repeated cutting of the thrombus is realized, the thrombus crushing efficiency is improved, and the operation time is reduced. Therefore, the thrombus crushing device and the thrombus removing system provided by the application not only can protect the blood vessel wall, but also can improve the thrombus crushing efficiency and the thrombus removing effect.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a thrombus fragmentation device and a thrombus removal system. Background Technology

[0002] Deep venous thrombosis (DVT) is a disease caused by abnormal blood clotting in the deep veins of the lower extremities. DVT leads to increased venous pressure, obstructed blood return, and symptoms such as swelling, pain, and dysfunction in the lower extremities. There is also a risk of thrombus detachment, which can travel with the bloodstream to the pulmonary artery, causing pulmonary embolism (PE). If DVT is not effectively treated in the acute phase, thrombus organization, venous obstruction, loss of valvular function, venous reflux, and venous hypertension can occur, leading to post-thrombosis syndrome (PTS), which endangers limb survival and threatens life.

[0003] Oral or injectable medications such as aspirin, heparin, or warfarin can enter the bloodstream, effectively dissolving venous thrombi and significantly reducing the incidence of deep vein thrombosis (DVT) and pulmonary embolism. However, drug prevention and treatment also have significant limitations. In patients with a predisposition to bleeding, hemorrhagic stroke, severe trauma, hemothorax, or anticoagulant disorders, it can lead to severe systemic bleeding, endangering the patient's life. Therefore, existing catheter-directed thrombolysis (CDT) can deliver thrombolytic drugs (such as urokinase) to the thrombus site, effectively reducing the thrombus burden and lowering the incidence of post-thrombotic syndrome (PTS). However, CDT treatment for DVT has the drawback of a long thrombolysis time, leading to prolonged catheterization, increased patient discomfort, and extended hospital stays; repeated blood draws, close monitoring, and high-level nursing care are required; and in cases of severe swelling or even limb survival-threatening conditions, it is not conducive to quickly restoring blood flow. Furthermore, CDT is not suitable for patients with high bleeding risk (such as severe hypertension) and is not suitable for patients in labor or pregnancy.

[0004] Therefore, for patients with severe DVT who cannot use thrombolytic drugs, traditional surgical thrombectomy can be used for treatment. However, traditional surgery also has drawbacks: venous thrombectomy is an invasive procedure and is not suitable for patients in poor general condition; thrombectomy may damage valve function; and residual thrombus may lead to wound complications if further thrombolysis and anticoagulation are performed.

[0005] In response to this, with technological advancements, percutaneous mechanical thrombectomy (PMT) devices have emerged in recent years. These devices are designed to remove acute and subacute thrombi within blood vessels, employing methods such as dissolution, fragmentation, and aspiration to remove the thrombus, restoring blood circulation and valvular function. PMTs are minimally invasive endovascular thrombectomy devices that can rapidly remove thrombi and restore blood flow. Some existing PMTs use a actuator to drive a delivery screw, which generates negative pressure to draw thrombi near the catheter tip into the catheter. The high-speed rotating screw then shears the thrombi and removes them through a tubing. However, due to the high-speed rotation of the delivery screw, during thrombus aspiration, the vessel wall can be drawn into the delivery tip and become entangled with the screw, posing a risk of damaging the vessel wall and causing vascular injury. Alternatively, some PMTs use a propulsion screw to drive a rotor, shearing thrombi near the inlet of the delivery tip and drawing them into the tip. The fragmented thrombi are then transported by the propulsion screw and removed through a disintegration catheter. However, because the rotor has a spiral structure, it can cause the blood vessel wall to get caught in the working head during the thrombus aspiration process, which poses a risk of damaging the blood vessel wall and causing vascular injury.

[0006] It is evident that existing PMTs (platelet-modulated metallization devices) cause damage to the blood vessel walls. Therefore, a new thrombus fragmentation device and thrombus removal system are needed. Summary of the Invention

[0007] The purpose of this invention is to provide a thrombus fragmentation device and a thrombus removal system to solve the problem of how to avoid damage to the blood vessel wall during the thrombus fragmentation process.

[0008] To solve the above-mentioned technical problems, the present invention provides a thrombus breaking device, comprising: a thrombus breaking unit and a separation unit; wherein,

[0009] The thrombectomy unit includes a thrombectomy head, a thrombectomy blade, and a transmission tube; the thrombectomy head has an inner cavity with both ends connected, the thrombectomy blade is disposed in the inner cavity, and the thrombectomy blade is connected to the distal end of the transmission tube so that the thrombectomy blade rotates when the transmission tube rotates; the side wall of the thrombectomy head has an opening, the opening exposing part of the thrombectomy blade so that after the thrombus enters the inner cavity through the opening, it is cut into pieces by the rotating thrombectomy blade;

[0010] The separation unit is connected to the proximal end of the thrombectomy head, and a portion of the separation unit is located between the transmission tube and the thrombectomy blade to partially cover the opening.

[0011] Optionally, in the described thrombus breaking device, the separation unit includes a connected connector and a baffle; the connector is connected to the proximal end of the thrombus-retrieving head, the proximal end of the baffle is connected to the distal end of the connector, and the baffle is located between the transmission tube and the thrombus breaking blade to partially cover the opening.

[0012] Optionally, in the aforementioned thrombus-breaking device, the separation unit includes the connector and at least one of the baffles; the connector is an annular structure and is fixedly connected to the proximal end of the thrombus-removing head.

[0013] Optionally, in the aforementioned bolt-breaking device, the separation unit further includes a fixing member, which is disposed opposite to the connecting member; a baffle connects the connecting member and the fixing member; and the fixing member is spaced apart from the transmission tube.

[0014] Optionally, in the aforementioned bolt breaking device, when the number of baffles is greater than 1, all the baffles are spaced apart from each other along the circumference of the connector.

[0015] Optionally, in the aforementioned bolt-breaking device, the outer surface of the baffle is curved.

[0016] Optionally, in the described bolt-breaking device, the baffle includes a body and a protrusion extending from a portion of the sidewall of the body; the protrusion and the portion of the sidewall of the body partially cover the opening.

[0017] Optionally, in the aforementioned thrombus breaking device, the thrombus breaking unit further includes a baffle bar, which is disposed on the side wall of the thrombus taking head and partially blocks the opening.

[0018] Optionally, in the aforementioned thrombus-breaking device, the side wall of the thrombus-retrieving head has an outlet, which communicates with the opening and is located at one end of the opening along the axial direction of the thrombus-retrieving head.

[0019] Optionally, in the aforementioned plug-breaking device, the plug-breaking blade is a tubular hollow structure and has at least one blade edge; wherein the blade edge is positioned facing the side wall of the plug-retrieving head.

[0020] Optionally, in the aforementioned bolt breaking device, the transmission tube is a hollow tube, and the hollow tube is formed by twisting flexible wire.

[0021] Optionally, in the aforementioned thrombus-breaking device, the thrombus-breaking device further includes a conical structure; the conical structure is disposed at the distal end of the thrombus-retrieving head and has a top hole communicating with the inner cavity.

[0022] Optionally, in the aforementioned bolt-breaking device, the bolt-breaking device further includes a guide wire, which passes sequentially through the transmission tube and the tapered structure, and extends out through the top hole.

[0023] Optionally, in the aforementioned thrombectomy device, the thrombectomy device further includes a sheath tube, the distal end of which is connected to the proximal end of the thrombectomy head; the transmission tube passes through the sheath tube and is spaced apart from the inner wall of the sheath tube.

[0024] Based on the same inventive concept, the present invention also provides a thrombus removal system, comprising a thrombus fragmentation module and a thrombus aspiration module; wherein,

[0025] The bolt breaking module includes a drive device and the bolt breaking device; the drive device is connected to the transmission tube to drive the transmission tube to rotate and drive the bolt breaking knife to rotate.

[0026] The thrombectomy module includes a thrombectomy tube and a thrombectomy device; the proximal end of the thrombectomy tube is connected to the thrombectomy device, and the distal end of the thrombectomy tube is connected to the inner cavity of the thrombectomy head.

[0027] In summary, this invention provides a thrombectomy device and a thrombus removal system. The thrombectomy device includes a thrombectomy unit and a separation unit. The separation unit is connected to the proximal end of the thrombectomy head, making the separation unit relatively fixed to the thrombectomy head, and a portion of the separation unit is located between the transmission tube and the thrombectomy blade to partially block the opening. The separation unit serves to block the blood vessel wall. That is, during thrombectomy, the separation unit can prevent the blood vessel wall and venous valves from entering the thrombectomy head, reducing damage to the blood vessel wall and venous valves. Furthermore, while blocking the blood vessel wall during thrombectomy, the separation unit can separate the mural thrombus from the blood vessel wall, increasing the efficiency of removing the mural thrombus and improving the thrombus removal effect. In addition, during thrombectomy, the thrombectomy blade, the separation unit, and the thrombectomy head form a multi-layer cutting structure, which can achieve repeated cutting of the thrombus, improving thrombectomy efficiency and reducing operation time. Therefore, the thrombus fragmentation device and thrombus removal system provided by the present invention can not only protect the blood vessel wall and prevent it from being damaged during the thrombus fragmentation process, but also improve the thrombus fragmentation efficiency, reduce the operation time and improve the thrombus removal effect. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the thrombus breaking device in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the thrombectomy head in an embodiment of the present invention;

[0030] Figure 3 This is a top view schematic diagram of the bolt-breaking knife in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram showing the connection between the separation unit and the transmission tube in an embodiment of the present invention;

[0032] Figure 5-8 This is a schematic diagram of the structure of a separation unit in an embodiment of the present invention;

[0033] Figure 9 This is a schematic diagram showing the position of the baffle in an embodiment of the present invention;

[0034] Figure 10 This is a schematic diagram showing the location of the outlet in an embodiment of the present invention;

[0035] Figure 11 This is a schematic diagram of the structure of the thrombus breaking device in an embodiment of the present invention;

[0036] The attached figures are labeled as follows:

[0037] 10-Plug breaking unit; 101-Plug taking head; 101a-Proximal end of plug taking head; 101b-Distal end of plug taking head; 102-Plug breaking knife; 103-Transmission tube; 104-Opening; 105-Stop bar; 106-Outlet;

[0038] 20-Separation unit; 201a-Connector; 201b-Fixing component; 202-Baffle; 2021-Body; 2022-Protrusion;

[0039] 30 - Guidewire; 40 - Sheath; 50 - Conical structure. Detailed Implementation

[0040] To make the objectives, advantages, and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to facilitate and clearly illustrate the objectives of the embodiments of the present invention. Furthermore, the structures shown in the drawings are often part of the actual structures. In particular, different figures may emphasize different aspects and sometimes use different scales. It should also be understood that, unless specifically stated or indicated, the terms "first," "second," "third," etc., in the specification are only used to distinguish the various components, elements, steps, etc., in the specification, and are not used to indicate the logical or sequential relationships between the various components, elements, steps, etc.

[0041] In this article, "proximal" and "distal" are defined as follows: "distal" usually refers to the end of the medical device that first enters the patient's body during normal operation, while "proximal" usually refers to the end of the medical device that is closest to the operator during normal operation.

[0042] To address the aforementioned technical problems, this embodiment provides a thrombus breaking device. Please refer to [link / reference]. Figure 1 The thrombectomy device includes a thrombectomy unit 10 and a separation unit 20. The thrombectomy unit 10 includes a thrombectomy head 101, a thrombectomy blade 102, and a transmission tube 103. The thrombectomy head 101 has an inner cavity with both ends connected. The thrombectomy blade 102 is disposed within the inner cavity, and the distal end of the transmission tube 103 extends into the inner cavity. The thrombectomy blade 102 is connected to the distal end of the transmission tube 103 so that rotating the transmission tube 103 drives the thrombectomy blade 102 to rotate. The sidewall of the thrombectomy head 101 has an opening 104 that exposes a portion of the thrombectomy blade 102, allowing the thrombus to enter the inner cavity through the opening 104 and be fragmented by the rotating thrombectomy blade 102. The separation unit 20 is connected to the proximal end of the thrombectomy head 101, so that the separation unit 20 and the thrombectomy head 101 are relatively fixedly connected. A portion of the separation part 20 is located between the transmission tube 102 and the thrombectomy blade 102, thus partially obscuring the opening 104. The separation unit 20 serves to block the blood vessel wall.

[0043] Therefore, during thrombectomy, the baffle 202 can prevent the vessel wall and venous valves from entering the thrombectomy head, reducing damage to the vessel wall and venous valves. Furthermore, while the separation unit 20 blocks the vessel wall during thrombectomy, it can separate the mural thrombus from the vessel wall, increasing the efficiency of removing the mural thrombus and improving the thrombus removal effect. In addition, during thrombectomy, the thrombectomy blade 102, the separation unit 20, and the thrombectomy head 101 form a multi-layer cutting structure, which can achieve repeated cutting of the thrombus, improving thrombectomy efficiency and reducing operation time. Thus, the thrombectomy device provided in this embodiment not only protects the vessel wall from damage during thrombectomy but also improves thrombectomy efficiency, reduces operation time, and enhances thrombus removal effect.

[0044] Specifically, in this embodiment, the separation unit 20 includes a connecting member 201a and a baffle 202 connected together. The connecting member 201a is connected to the proximal end of the thrombectomy head 101, and the proximal end of the baffle 102 is connected to the distal end of the connecting member 201a. The baffle 102 is located between the transmission tube 103 and the thrombectomy blade 102 to partially cover the opening 104. The connecting member 201a can be connected to the proximal end of the thrombectomy head 101 by interference fit, snap-fit, or other means, so that the connecting member 201a and the thrombectomy head 101 are relatively fixedly connected. The baffle 202 and the connecting member 201a can be integrally formed or fixedly connected by welding or other means. Therefore, the baffle 202 serves to block the blood vessel wall.

[0045] The number of baffles 202 can be one or more. Please refer to [reference needed]. Figure 5When there is only one baffle 202, it is located between the transmission tube 103 and the bolt cutter 102 to partially cover the opening 104. When there are multiple baffles 202, they are evenly distributed along the circumference of the connector 201a. For example, if there are two baffles 202, they are spaced apart along the circumference of the connector 201a to form a door-shaped gap. Each baffle 202 partially covers the opening 104. Compared to covering the opening 104 from one side, covering both sides simultaneously allows the uncovered portion of the opening 104 to be placed in the middle of the original opening 104, thus adjusting the opening position.

[0046] The following is in conjunction with the appendix Figure 1-11 The thrombus-breaking device provided in this embodiment is described in detail below:

[0047] Please continue reading. Figure 1-3 The thrombectomy head 101 is a hollow tube with an inner cavity connected at both ends. Preferably, the hollow tube is made of flexible wire twisted together. The flexible wire is made of, but is not limited to, metal. Since the thrombectomy blade 102 and the transmission tube 103 are disposed within the inner cavity, the thrombectomy head 101 increases the distance between the thrombectomy blade 102 and the blood vessel wall, reducing the contact volume between the blood vessel wall and the thrombectomy blade 102, thus protecting the blood vessel wall during the thrombectomy process.

[0048] The thrombectomy blade 102 has a tubular, hollow structure, which not only occupies little space and facilitates rotation while mounted on the transmission tube 103, but also allows for multiple blades to be set, improving cutting efficiency. Furthermore, the hollow design facilitates the flow of gas and liquid during rotation, reducing rotational resistance and improving the stability of the thrombectomy device during operation. Further, depending on the required degree of thrombectomy, the thrombectomy blade 102 can have one, two, or multiple blades; more blades result in higher thrombectomy efficiency. Moreover, the blades are positioned towards the side wall of the thrombectomy head 101, i.e., towards the opening 104, so that the thrombus is cut when it enters the inner cavity through the opening 104.

[0049] Please see Figure 1 , 4 In addition to 5, the separation unit 20 is also disposed in the inner cavity. Preferably, the connector 201a in the separation unit 20 is an annular structure and is sleeved on the transmission tube 103. Furthermore, the proximal end of the connector 201a is connected to the proximal end 101a of the thrombectomy head, and the distal end of the connector 201a is connected to the proximal end of the baffle 202, so that the baffle 202 can always block part of the opening 104 during thrombectomy, thereby blocking the blood vessel wall outside the thrombectomy head 101 and preventing it from being caught in the inner cavity by the rotating thrombectomy blade 102, causing damage.

[0050] To further limit the position of the baffle 202 and ensure stability during operation, the separation unit 20 also includes a fixing member 201b. The fixing member 201b is disposed opposite to the connecting member 201a, and the connecting member 201a and the fixing member 201b are respectively connected to opposite ends of the baffle 202. Preferably, the fixing member 201b is also a ring structure, sleeved on the distal end of the transmission pipe 103, spaced apart from the transmission pipe 103, meaning the fixing member 201b does not contact the transmission pipe 103. Therefore, when the transmission pipe 103 rotates, it will not affect the fixing member 201b, thus ensuring the static state of the separation unit 20. Furthermore, when the baffle 202 is subjected to a large impact from gas or liquid, it will twist. Under the restraint of the fixing member 201b, the amplitude of the twisting of the baffle 202 will be reduced, ensuring the stability of the bolt breaking device. Of course, to reduce costs and simplify the device, only the connector 201a can be provided, without the fastener 201b. For example... Figure 6 As shown, the separation unit 20 includes a connector 201a and a baffle 202. The connector 201a is connected to the proximal end of the baffle 202 and the proximal end 101a of the thrombectomy head, which can also achieve the effect of protecting the blood vessel wall.

[0051] Furthermore, when the separation unit 20 also includes a fixing member 201b, the number of baffles 202 can be one, two, or three, etc. When the number of baffles 202 is greater than one, all the baffles 202 are spaced apart from each other along the circumference of the connecting member 201a. Figure 7 The number of baffles 202 shown is two. Two baffles 202 are spaced apart from each other along the circumference of the connector 201a, forming a door-shaped gap. Each baffle 202 partially covers the opening 104. Compared to covering the opening 104 from one side, simultaneously covering both sides allows the uncovered portion of the opening 104 to be placed in the middle of the original opening 104, thus adjusting the opening position.

[0052] The outer surface of the baffle 202 is curved, optionally an arc-shaped surface, to fit the outer contours of the connector 201a and the fixing member 201b. Furthermore, besides... Figure 4-7 The baffle 202 shown is a regular arc-shaped surface; however, the baffle 202 can also be an irregular arc-shaped surface. For example... Figure 8As shown, the baffle 202 includes a body 2021 and a protrusion 2022 extending from a portion of the sidewall of the body 2021. The protrusion 2022 and a portion of the sidewall of the body 2021 partially cover the opening 104, so that the shape and position of the uncovered portion of the opening 104 can be changed according to the needs of breaking the bolt, thereby obtaining different covering states and providing good expandability.

[0053] To further improve the blocking effect, such as Figure 9 As shown, the thrombectomy unit 10 provided in this embodiment further includes at least one baffle 105, which is disposed on the side wall of the thrombectomy head 101 and partially blocks the opening 104. Optionally, the baffle 105 partially blocks the opening along the axial direction of the thrombectomy head 101. During the thrombectomy process, when the blood vessel wall is attracted to the opening 104, the volume of the blood vessel wall entering the internal space of the thrombectomy knife 102 is reduced under the blocking action of the baffle 3. Secondly, under the dual action of the pushing of the thrombectomy knife 102 and the blocking action of the baffle 202, the blood vessel wall is pushed out of the internal space of the thrombectomy knife 102 and detached from the opening 104 under the tension of the blood vessel wall, thereby avoiding damage to the blood vessel wall and separating the mural thrombus from the blood vessel wall.

[0054] Furthermore, the baffle 105 also functions to cut the thrombus. Under the rapid rotation of the thrombectomy blade 102, both the thrombus and the vessel wall are drawn towards the opening 104 by suction. When the rapidly flowing thrombus comes into contact with the baffle 105, it experiences a significant reaction force, causing the thrombus to be cut and achieving the purpose of thrombus fragmentation. Compared to the soft external tissue of the thrombus, the vessel wall has a certain tension and is densely packed, thus it will not be cut by the baffle 105. Conversely, the baffle 105 can prevent the vessel wall from entering the lumen, thus protecting the vessel. Preferably, the baffle 105 is integrally formed with the thrombectomy head 101. Therefore, during the thrombectomy process, the thrombectomy blade 102, the baffle 105, the baffle 202, and the opening 104 form a multi-layered cutting structure, which can achieve repeated cutting of the thrombus, improve thrombus fragmentation efficiency, and reduce surgical time.

[0055] Furthermore, such as Figure 1 and 10As shown, the sidewall of the thrombectomy head 101 has an outlet 106, which communicates with the opening 104 and is located at one end of the opening 104 along the axial direction of the thrombectomy head 101. During the thrombectomy process, when the vessel wall is attracted to the opening 104, on the one hand, under the action of the baffle 202, the vessel wall cannot be wound into the thrombectomy head 101 by the thrombectomy blade 102; on the other hand, under the pushing action of the thrombectomy blade 102, the vessel wall is pushed to the outlet 106 and squeezed out of the opening 104 under the blocking action of the baffle 202 and the tension of the vessel wall, thereby avoiding damage to the vessel wall and separating the mural thrombus from the vessel wall.

[0056] Please see Figure 11 The thrombectomy device further includes a guide wire 30, a sheath 40, and a conical structure 50. The conical structure 50 is located at the distal end 101b of the thrombectomy head 101 and has a top hole communicating with the inner cavity. The guide wire 30 passes sequentially through the transmission tube 103 and the conical structure 50, and extends through the top hole to guide the thrombectomy device when it enters the target working area. The distal end of the sheath 40 is connected to the proximal end 101a of the thrombectomy head, and the transmission tube 103 passes through the sheath 40 and is spaced apart from the inner wall of the sheath 40. After being fragmented, the thrombus enters the inner cavity of the thrombectomy head 101 and falls into the thrombectomy module through the gap between the transmission tube 103 and the sheath 40.

[0057] Based on the same inventive concept, this embodiment also provides a thrombus removal system, including a thrombus fragmentation module and a thrombus aspiration module. The thrombus fragmentation module includes a driving device and a thrombus fragmentation device. The driving device is connected to the transmission tube 103 to drive the transmission tube 103 to rotate and drive the thrombus fragmentation knife 102 to rotate. Optionally, the driving device is a motor. The thrombus aspiration module includes a thrombus aspiration tube and a thrombus aspiration device. The proximal end of the thrombus aspiration tube is connected to the thrombus aspiration device, and the distal end of the thrombus aspiration tube is connected to the sheath 40 and communicates with the inner cavity of the thrombectomy head 101. Optionally, the thrombus aspiration device is a peristaltic pump.

[0058] When the driving device is activated, it drives the transmission tube 103 to rotate, which in turn drives the thrombectomy blade 102 to rotate. Simultaneously, the thrombectomy device is activated, generating a suction effect. The thrombus, after suction, passes through the opening 104 and is broken up by the thrombectomy blade 102. The thrombus fragments then pass through the inner lumen to the sheath 40, and are then suctioned out through the suction tube, thus completing the thrombectomy. The baffle 202, the baffle strip 105, and the outlet 106 all prevent the blood vessel wall from being sucked in and damaged, thus protecting the blood vessel wall. Furthermore, the multiple cutting actions of the opening 104, the baffle 202, the baffle strip 105, and the thrombectomy blade 102 improve the cutting efficiency and the thrombus removal effect.

[0059] In summary, this embodiment provides a thrombus fragmentation device and a thrombus removal system. The thrombus fragmentation device includes a fragmentation unit 10 and a separation unit 20. The separation unit 20 is connected to the proximal end 101a of the thrombectomy head, and a portion of the separation unit 20 is located between the transmission tube 103 and the fragmentation blade 102 to partially obscure the opening, thus blocking the blood vessel wall. That is, during thrombectomy, the separation unit 20 can prevent the blood vessel wall and venous valves from entering the thrombectomy head 101, reducing damage to the blood vessel wall and venous valves.

[0060] Furthermore, during thrombectomy, the separation unit 20, while blocking the vessel wall, can separate the mural thrombus from the vessel wall, increasing the efficiency of thrombus removal and improving the thrombus clearance effect. In addition, during thrombectomy, the thrombectomy blade 102, the separation unit 20, and the thrombectomy head 101 form a multi-layer cutting structure, enabling repeated cutting of the thrombus, improving thrombectomy efficiency, and reducing surgical time. Therefore, the thrombectomy device and thrombus removal system provided in this embodiment not only protect the vessel wall from damage during thrombectomy but also improve thrombectomy efficiency, reduce surgical time, and enhance thrombus clearance effect.

[0061] Furthermore, it should be understood that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the technical solutions of the present invention based on the disclosed technical content, or equivalent embodiments can be modified accordingly, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, shall still fall within the scope of protection of the present invention.

Claims

1. A pick device, characterized in that The device comprises: a thrombus breaking unit and a separation unit; wherein, the thrombus breaking unit comprises a thrombus breaking head, a thrombus breaking knife and a transmission pipe; the thrombus breaking head has an inner cavity with two ends in communication, the thrombus breaking knife is arranged in the inner cavity, the thrombus breaking knife is connected with the distal end of the transmission pipe to drive the thrombus breaking knife to rotate when the transmission pipe rotates; the side wall of the thrombus breaking head has an opening, the opening exposes part of the thrombus breaking knife, so that the thrombus is cut into pieces by the rotating thrombus breaking knife after entering the inner cavity through the opening; the separation unit is connected with the proximal end of the thrombus breaking head, part of the separation unit is located between the transmission pipe and the thrombus breaking knife to shield part of the opening.

2. The plug device of claim 1, wherein The separation unit comprises a connecting piece and a baffle; the proximal end of the connecting piece is connected with the proximal end of the thrombus breaking head, the proximal end of the baffle is connected with the distal end of the connecting piece, and the baffle is located between the transmission pipe and the thrombus breaking knife to shield part of the opening.

3. The plug device of claim 2, wherein The separation unit comprises the connecting piece and at least one baffle; the connecting piece is in the form of a ring structure, and the connecting piece is fixedly connected with the proximal end of the thrombus breaking head.

4. The plug device of claim 3, wherein The separation unit further comprises a fixing piece, the fixing piece is arranged opposite to the connecting piece; the baffle connects the connecting piece and the fixing piece; the fixing piece is arranged in a spaced manner with the transmission pipe.

5. A splicing device according to any one of claims 2-4, characterised in that When the number of baffles is greater than 1, all the baffles are arranged in a spaced manner along the circumference of the connecting piece.

6. A splicing device according to any one of claims 2-4, characterised in that The outer surface of the baffle is in the form of a curved surface.

7. A splicing device according to any one of claims 2-4, characterised in that The baffle comprises a body and a protruding part extending from part of the side wall of the body; the protruding part and part of the side wall of the body shield part of the opening.

8. The plug device of claim 1, wherein The thrombus breaking unit further comprises a baffle strip, the baffle strip is arranged on the side wall of the thrombus breaking head and shields part of the opening.

9. The plug device of claim 1, wherein The side wall of the thrombus breaking head has a guide outlet, the guide outlet is in communication with the opening, and the guide outlet is located at one end of the opening along the axial direction of the thrombus breaking head.

10. The plug device of claim 1, wherein The thrombus breaking knife is in the form of a tubular hollow structure and has at least one blade; wherein, the blade is arranged towards the side wall of the thrombus breaking head.

11. The plug device of claim 1, wherein The transmission pipe is in the form of a hollow pipe, and the hollow pipe is twisted by a flexible wire.

12. The plug device of claim 1, wherein The thrombus breaking device further comprises a conical structure; the conical structure is arranged at the distal end of the thrombus breaking head and has a top hole in communication with the inner cavity.

13. The plug device of claim 12, wherein, The thrombus breaking device further comprises a guide wire, the guide wire penetrates the transmission pipe and the conical structure in sequence and extends out through the top hole.

14. The plug device of claim 1, wherein The thrombus breaking device further comprises a sheath tube, the distal end of the sheath tube is connected with the proximal end of the thrombus breaking head; the transmission pipe penetrates the sheath tube and is spaced from the inner wall of the sheath tube.

15. A thrombectomy system, comprising: The device comprises a thrombus breaking module and a thrombus suction module; wherein, the thrombus breaking module comprises a driving device and the thrombus breaking device as claimed in any one of claims 1-14; the driving device is connected with the transmission pipe to drive the transmission pipe to rotate and drive the thrombus breaking knife to rotate; the thrombus suction module comprises a thrombus suction pipe and a thrombus suction device; the proximal end of the thrombus suction pipe is connected with the thrombus suction device, and the distal end of the thrombus suction pipe is in communication with the inner cavity of the thrombus breaking head.

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