Thrombus aspiration device

Abstract

The utility model relates to the technical field of medical instruments, and particularly discloses a thrombus aspiration device which comprises a sleeve, a plunger and a driving assembly, the far end of the sleeve is provided with an aspiration opening, the plunger is arranged in the sleeve, and the driving assembly is connected with the plunger to drive the plunger to move in the axial direction of the sleeve. The plunger comprises a plunger body and a plunger shaft connected with the plunger body, a butt joint structure is arranged on the near end side of the plunger body, the plunger shaft comprises a first rib plate and a second rib plate which extend in the axial direction of the plunger, the first rib plate and the second rib plate are arranged in a crossed mode, a receding opening is formed in the far end of the second rib plate, and at least part of the butt joint structure is located in the receding opening. According to the scheme, the avoiding opening is formed in the far end of the second rib plate, the separation effect of the plug shaft on the near end side of the plug body is reduced, the avoiding opening can avoid the butt joint structure, the size of the butt joint structure can be made to be large, and therefore the suction efficiency of the whole thrombus suction device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially, relates to a kind of thrombus suction device. BACKGROUND

[0002] Thrombus is the small piece formed on the surface of the blood flow in the vascular surface of cardiovascular system or repair site. When normal blood flow flows, arterial blood supplies nutrition to all parts of the body, provides oxygen, and after metabolism, metabolic products and carbon dioxide are returned to the heart with venous blood, and are metabolized by the lung, which is the circulation process. Local thrombus breaks the circulation state of flow, causing local obstruction. Arterial thrombus can cause blood supply organ infarction, and venous thrombus can cause venous thromboembolism, and severe cases can have pulmonary embolism class fatal disease. Therefore, thrombus is a dangerous disease, and prevention is needed to avoid thrombus formation, and early treatment is needed to avoid serious consequences.

[0003] There are some thrombus suction devices in the related art, but the thrombus suction device in the related art has low suction efficiency and is prone to blockage. For doctors, it is more physically demanding, and for patients, the treatment time is longer, increasing the pain of surgery. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of thrombus suction device, to solve the technical problem of low suction efficiency of thrombus suction device in the related art.

[0005] To solve the above problems, the utility model adopts the following technical solutions:

[0006] The application provides a thrombus suction device, comprising a sleeve, a plunger and a driving assembly.

[0007] The distal end of the sleeve is provided with a suction port, the plunger is arranged in the sleeve, and the driving assembly is connected with the plunger to drive the plunger to move along the axial direction of the sleeve.

[0008] The plunger comprises a plug body and a plug shaft connected to the plug body, the plug body is provided with a docking structure at its proximal end side, the plug shaft comprises a first rib plate and a second rib plate arranged in the axial direction of the plunger, the first rib plate and the second rib plate are arranged in cross, and the distal end of at least one of the first rib plate and the second rib plate has a avoiding port, and at least part of the docking structure is located in the avoiding port.

[0009] Further, the second rib plate comprises a first reinforcing rib and two second reinforcing ribs arranged at intervals, the avoiding port is formed between the two second reinforcing ribs, and the distal end of the first reinforcing rib is connected to the proximal end of the two second reinforcing ribs respectively.

[0010] Further, the distal end of the first rib plate is provided with an avoiding hole penetrating through the first rib plate, and the avoiding hole of the first rib plate is opposite to the avoiding gap formed between the two second reinforcing ribs.

[0011] Further, the second reinforcing rib is arranged along the edge of the avoiding hole of the first rib plate.

[0012] Further, the abutting structure is biased on the lower side of the plug body; and / or, the abutting structure is biased on at least one side of the first rib plate; and / or, the first rib plate is provided with an arc-shaped protrusion at both ends in the height direction of the first rib plate, and the arc-shaped protrusion is fitted with the inner wall of the sleeve.

[0013] Further, the thrombus suction device further comprises a catheter, the catheter at least comprising a first pipe segment connected with the suction port and a second pipe segment connected with the abutting structure, and the first pipe segment and the second pipe segment are both provided with a one-way valve, and the opening area of the one-way valve is greater than or equal to the opening area of the catheter when the one-way valve is in an open state.

[0014] Further, the abutting structure comprises a first joint and a buckle, the end of the catheter is provided with a second joint, the catheter is connected with the first joint through the second joint, and the buckle is in clamping cooperation with the second joint.

[0015] Further, the first joint is a conical column structure, and the large end of the first joint is connected with the plug body.

[0016] Further, the plunger further comprises a wing plate connected outside the plug shaft, the wing plate is provided with a clamping groove corresponding to the first joint, and the catheter is clamped in the clamping groove.

[0017] Further, the driving assembly comprises a first arm, a second arm and an elastic reset member, the first arm and the second arm are hinged, the first arm is hinged with the sleeve, the second arm is hinged with the plunger, and the elastic reset member is connected with the first arm and the second arm.

[0018] Further, the outer wall of the sleeve is provided with a convex strip, the end of the first arm is provided with a mounting hole, and the first arm is rotatably sleeved on the convex strip through the mounting hole.

[0019] The technical scheme adopted by the utility model can achieve the following beneficial effects:

[0020] The thrombus suction device of the application can reduce the separation effect of the plug shaft on the proximal end side of the plug body by arranging an avoiding opening at the distal end of the second muscle plate, the avoiding opening can avoid the butt joint structure, so that the butt joint structure has a larger installation area on the proximal end side of the plug body, so that compared with the thrombus suction device in the related art, the flow diameter of the butt joint structure after butt joint can be greatly expanded and improved, thereby improving the suction efficiency of the whole thrombus suction device, and the blockage condition can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0022] Figure 1 is a structure schematic view of the thrombus suction device of the embodiment of the application;

[0023] Figure 2 is a structure schematic view of the thrombus suction device of the embodiment of the application;

[0024] Figure 3 is a structure schematic view of the sleeve of the embodiment of the application;

[0025] Figure 4 is a structure schematic view of the plunger of the embodiment of the application;

[0026] Figure 5 is a top view of the plunger of the embodiment of the application;

[0027] Figure 6 is Figure 5 a sectional view in A-A direction in FIG.

[0028] Figure 7 is a connection schematic view of the plunger and the catheter of the embodiment of the application;

[0029] Figure 8 is Figure 7 a local enlarged schematic view at B in FIG.

[0030] Figure 9 is a connection schematic view of the catheter and the one-way valve of the embodiment of the application;

[0031] Figure 10 is a cooperation schematic view of the plunger and the sleeve of the embodiment of the application;

[0032] Figure 11 is a structure schematic view of the plunger of the embodiment of the application;

[0033] Figure 12 is Figure 11 a sectional view along the direction of C-C in figure

[0034] Figure 13 is one of the structure schematic diagrams of the driving assembly of the embodiment of the present application;

[0035] Figure 14 is the second structure schematic diagram of the driving assembly of the embodiment of the present application.

[0036] in the figure:

[0037] 100, sleeve; 110, first sleeve segment; 111, convex strip; 120, second sleeve segment; 121, suction port; 130, first step surface; 200, plunger; 210, plug body; 211, butt joint structure; 2111, first joint; 2111a, discharge hole; 2112, buckle; 220, plug shaft; 221, first muscle plate; 2211, avoidance hole; 2212, arc-shaped protrusion; 222, second muscle plate; 2221, first reinforcing rib; 2222, second reinforcing rib; 2223, avoidance port; 230, wing plate; 231, clamping groove; 240, handle; 300, driving assembly; 310, first arm; 311, clamping part; 312, mounting hole; 313, guide column; 312a, open slot; 320, second arm; 321, shaft part; 330, elastic reset member; 400, catheter; 410, second joint; 411, second joint body; 412, boss; 412a, second step surface; 500, one-way valve. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of the present application.

[0039] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, not to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of a kind and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in a "or" relationship.

[0040] In the utility model, "proximal end" and "distal end" are relative positions of the structure in the use environment, relative to the human operation, to facilitate the description of the positional relationship between the components, and facilitate understanding; "proximal end" and "distal end" are relative positional relationship, not absolute.

[0041] The utility model is described in detail below in combination with the accompanying drawings Figures 1 to 14 The thrombus suction device provided by the embodiment of the application is described in detail in combination with specific examples and application scenarios.

[0042] Please refer to Figure 1 and Figure 2 The embodiment of the application discloses a thrombus suction device, which is mainly used for sucking thrombus in blood vessels, such as thrombus in coronary arteries, cerebral vessels and deep veins of lower limbs, and can place the suction catheter of the thrombus suction device at the occlusion on the basis of percutaneous coronary intervention, suck the thrombus out through suction, rapidly restore blood flow and reduce the pain and risk of patients.

[0043] Specifically, the thrombus suction device comprises a sleeve 100, a plunger 200 and a driving assembly 300, wherein the distal end of the sleeve 100 is provided with a suction port 121 in communication with the inner cavity of the sleeve 100, the plunger 200 is movably arranged in the sleeve 100, and the driving assembly 300 is connected with the plunger 200 to drive the plunger 200 to move along the axial direction of the sleeve 100.

[0044] Please refer to Figure 4 The plunger 200 comprises a plunger body 210 and a plunger shaft 220 connected with the plunger body 210, and the plunger body 210 is tightly attached to the inner wall of the sleeve 100. When the thrombus in the blood vessel is sucked, the driving assembly 300 is operated, the plunger body 210 is pulled back to move away from the suction port 121 through the plunger shaft 220, at this time, a negative pressure is formed in the sleeve 100, so that the thrombus is sucked into the sleeve 100, and the thrombus sucked into the sleeve 100 refers to the thrombus sucked into the accommodation space formed between the plunger body 210 and the distal end of the sleeve 100.

[0045] Please continue to refer to Figure 4 The plunger body 210 is provided with a docking structure 211 at the proximal end side, the docking structure 211 is used for docking with the catheter 400, and the thrombus accommodated in the accommodation space can be discharged to the catheter 400 through the docking structure 211. Specifically, when the storage capacity of the thrombus in the accommodation space reaches a certain amount, the plunger body 210 can be moved towards the suction port 121 by the plunger shaft 220, the plunger body 210 compresses the accommodation space and increases the pressure in the accommodation space, and the thrombus in the accommodation space is discharged to the catheter 400 through the docking structure 211, so that the thrombus suction device can perform the next suction operation.

[0046] The inventor found in the research process that, in the related art, in order to ensure the support strength of the plug shaft to the plug body, the cross section of the plug shaft at any position in the axial direction of the plug shaft is cross-shaped, so that the proximal end side of the plug body is divided into four areas distributed in the circumferential direction, and the four areas are separated by the plug shaft, and the discharge port for discharging thrombus and the corresponding docking structure 211 can only be arranged in one of the four areas, so that the caliber of the docking structure 211 for docking with the catheter 400 can only be small, thereby seriously affecting the pumping efficiency of the thrombus pumping device, and blockage is prone to occur.

[0047] In the embodiment of the present application, the plug shaft 220 comprises a first rib plate 221 and a second rib plate 222 arranged along the axial direction thereof, and the first rib plate 221 and the second rib plate 222 are arranged in cross shape, for example, the first rib plate 221 is perpendicular to the second rib plate 222, wherein the first rib plate 221 can be arranged vertically, and the second rib plate 222 is arranged horizontally, please refer to Figure 3 The vertical direction referred to herein is the Z-axis direction in Figure 3 The vertical direction referred to herein is the X-axis direction in Figure 3 .

[0048] In the embodiment of the present application, the distal end of the second rib plate 222 has a avoiding port 2223, and at least part of the docking structure 211 is located in the avoiding port 2223. By arranging the avoiding port 2223 at the distal end of the second rib plate 222, the separating effect of the plug shaft 220 on the proximal end side of the plug body 210 can be reduced, and the avoiding port 2223 can avoid the docking structure 211, so that the docking structure 211 has a larger mounting area on the plug body 210. Thus, when the docking structure 211 is docked with the catheter 400, the docking caliber of the docking structure 211 can be larger, compared with the thrombus pumping device in the related art, the pumping efficiency of the whole thrombus pumping device can be improved, and blockage can be avoided.

[0049] Please continue to refer to Figure 4The second rib plate 222 comprises a first reinforcing rib 2221 and a second reinforcing rib 2222, the two second reinforcing ribs 2222 are arranged at intervals to form the aforementioned avoiding port 2223 therebetween, and the distal end of the first reinforcing rib 2221 is connected to the proximal end of the two second reinforcing ribs 2222, respectively. In this way, the interval arrangement of the two second reinforcing ribs 2222 can form the avoiding port 2223 of the docking structure 211, and can also ensure that the distal end of the second rib plate 222 can effectively support the plug body 210, so as to avoid the situation that the plug body 210 is easy to deflect around the distal end of the first rib plate 221 when subjected to load in the case that only the distal end of the first rib plate 221 supports the plug body 210, that is, the first rib plate 221 and the two second reinforcing ribs 2222 arranged at intervals are connected to the plug body 210 together, which can ensure the stability of the connection between the plug body 210 and the plunger 200 while having the avoiding port 2223.

[0050] In a further technical solution, please refer to Figure 5 and Figure 6 The distal end of the first rib plate 221 is provided with an avoiding hole 2211 penetrating the first rib plate 221, and the avoiding hole 2211 of the first rib plate 221 is opposite to the avoiding port 2223 formed between the two second reinforcing ribs 2222. On the one hand, the design of the avoiding port 2223 penetrating the avoiding port 2223 can provide more avoiding space for the docking structure 211, which is conducive to making the caliber of the docking structure 211 relative to the catheter 400 larger, increasing the pumping efficiency of the thrombus pumping device and playing a blocking prevention effect, on the other hand, based on the penetrating design of the avoiding port 2223, the mold can be pulled from both sides of the first rib plate 221 when the plunger 200 is injection molded, which is convenient for production.

[0051] In an optional embodiment of the application, the second reinforcing rib 2222 is arranged along the edge of the avoiding hole 2211 of the first rib plate 221, so that the opening size of the avoiding hole 2211 can be maximized within the area defined by the two second reinforcing ribs 2222, and the avoiding effect of the avoiding hole 2211 can be improved to provide a larger avoiding space for the arrangement of the docking structure 211.

[0052] In the application embodiment, please refer to Figure 4 , Figure 7 and Figure 8The docking structure 211 includes a first connector 2111 and a buckle 2112, and the thrombus suction device can further include a catheter 400. The first connector 2111 and the buckle 2112 are both arranged on the proximal end side of the plug body 210. The first connector 2111 has an exhaust hole 2111a penetrating through the plug body 210. The end of the catheter 400 is provided with a second connector 410. The end of the catheter 400 is sleeved on the first connector 2111 through the second connector 410. The buckle 2112 is in clamping cooperation with the second connector 410 to avoid the catheter 400 from being separated from the first connector 2111. When the first connector 2111 and the second connector 410 are in abutment, the exhaust hole 2111a is in communication with the above-mentioned accommodation space and the catheter 400. Exemplarily, please refer to Figure 8 The second connector 410 includes a second connector body 411 and a boss 412 radially protruding from the second connector body 411. The proximal end surface of the boss 412 constitutes a second stepped surface 412a. The clamping hook part of the buckle 2112 is clamped on the second stepped surface 412a, so as to realize the connection and fixation of the first connector 2111 and the second connector 410.

[0053] In the embodiment of the present application, the number of buckles 2112 is at least two, and all the buckles 2112 are distributed along the circumference of the first connector 2111. The plurality of buckles 2112 distributed along the circumference of the first connector 2111 helps to improve the stability of the connection of the first connector 2111 and the second connector 410. Each buckle 2112 plays a certain fixing role, which ensures that the first connector 2111 and / or the second connector 410 can maintain a relatively stable state when subjected to external disturbance. In the preferred embodiment, the buckles 2112 are two symmetrically about the center of the first connector 2111, and the distribution directions of the two buckles 2112 are perpendicular to the opening direction of the avoiding port 2223. In this way, the stability of the connection can be ensured, and the space occupation on the proximal end side of the plug body 210 can be reduced.

[0054] In the embodiment of the present application, the catheter 400 includes a first pipe segment connected with the suction port 121 and a second pipe segment connected with the docking structure 211. When the suction operation is performed, the first pipe segment is used to suction the thrombus in the blood vessel into the above-mentioned accommodation space, and the second pipe segment is used to exhaust the thrombus in the accommodation space outward.

[0055] In the embodiment of the present application, please refer to Figure 9The conduit 400 is provided with a one-way valve 500 on each of the first pipe segment and the second pipe segment: when the plug shaft 220 pushes the plug body 210 to move towards the suction port 121 to expel the thrombus in the accommodation space, the one-way valve 500 on the first pipe segment can prevent the thrombus in the accommodation space from flowing back through the first pipe segment, so as to avoid causing a surgical safety accident; when the plug shaft 220 pulls the plug body 210 to move away from the suction port 121, the one-way valve 500 on the second pipe segment can prevent the thrombus expelled through the first joint 2111 from flowing back into the accommodation space.

[0056] It can be understood that, in the case that the one-way valve 500 is in an open state, if the opening area of the one-way valve 500 is smaller than the opening area of the conduit 400, the thrombus will be limited when passing through the one-way valve 500, thereby the suction efficiency of the thrombus suction device is affected, and even the conduit 400 is blocked. Based on this situation, in the embodiments of the present application, in the case that the one-way valve 500 is in an open state, the opening area of the one-way valve 500 is greater than or equal to the opening area of the conduit 400, thereby avoiding the influence of the one-way valve 500 on the flow rate of the conduit 400, and ensuring the suction efficiency of the thrombus suction device. Exemplarily, the one-way valve 500 can be a duckbill valve, which is a kind of elastic check valve, and its structure is similar to the shape of a duckbill. When the thrombus in the conduit 400 flows in a preset direction, the duckbill valve will open to allow the thrombus to pass through; and when the thrombus moves reversely, the duckbill valve will automatically close to prevent the thrombus from flowing back.

[0057] Please refer to Figure 11 and Figure 12 , along the height direction of the plug body 210, the abutting structure 211 is offset to the lower side of the plug body 210, so that the first joint 2111 is connected to the lower part of the aforementioned accommodation space, and based on the action of gravity, the thrombus in the accommodation space is more likely to be expelled from the first joint 2111.

[0058] In further technical solutions, the first joint 2111 is a tapered column structure, the large end of the first joint 2111 is connected to the plug body 210, and the small end of the first joint 2111 faces the proximal end. When the second joint 410 is connected to the first joint 2111, the small end of the first joint 2111 will first extend into the second joint 410, thereby playing a pre-positioning role and increasing the convenience of the connection of the two, and in the process of the continuous extension of the first joint 2111, the outer wall of the first joint 2111 gradually abuts against the inner wall of the second joint 410 to form a tight fit, which can also increase the stability and sealing performance of the connection of the two.

[0059] In the embodiments of the present application, the number of the first joint 2111 can be one or two. In the case that the number of the first joint 2111 is two, the suction efficiency of the entire thrombus suction device can be improved. Please continue to refer to Figure 11 and Figure 12The first joints 2111 are biased to at least one side of the first web plate 221. Specifically, when the first joint 2111 is one, the first joint 2111 can be distributed on the left side of the first web plate 221, or on the right side of the first web plate 221; when the first joint 2111 is two, the two first joints 2111 can be arranged on the left and right sides of the first web plate 221, rather than in the extension direction of the first web plate 221. Based on the above scheme, the first joint 2111 is biased to the extension direction of the first web plate 221, so that the conduit 400 connected with the first joint 2111 can avoid the second reinforcing rib 2222 of the second web plate 222 at a small bending amplitude, which on the one hand facilitates the connection between the conduit 400 and the first joint 2111, and on the other hand reduces the bending amplitude or bending position of the conduit 400, facilitating the smooth discharge of the thrombus sucked into the accommodation space.

[0060] In the embodiment of the present application, the first web plate 221 is provided with arc-shaped protrusions 2212 at both ends in the height direction, the arc-shaped protrusions 2212 are in close contact with the inner wall of the sleeve 100, the number of arc-shaped protrusions 2212 can be multiple, and the multiple arc-shaped protrusions 2212 extend in the axial direction of the sleeve 100. Specifically, the arc-shaped protrusions 2212 distributed on the upper and lower ends of the first web plate 221 can provide support for the plunger shaft 220 in the height direction, so that the plunger 200 can have good coaxiality with the sleeve 100 when moving, avoiding the driving assembly 300 from swinging the plunger shaft 220 up and down during driving to generate a gap between the plunger shaft 220 and the inner wall of the sleeve 100, thereby reducing the sealing performance of the plunger body 210 to the accommodation space; at the same time, the arc-shaped protrusions 2212 can reduce the scratching of the inner wall of the sleeve 100, avoiding damage to the inner wall of the sleeve 100 to affect the sealing performance between the plunger body 210.

[0061] Please refer to Figure 4 and Figure 7The plunger 200 further comprises wing plates 230 connected to the outer side of the plunger shaft 220, the wing plates 230 being distributed at the proximal end of the plunger body 210, the wing plates 230 being in abutment with the inner wall of the sleeve 100 to limit the cooperation with the sleeve 100 in the radial direction of the sleeve 100, the wing plates 230 being provided with clamping grooves 231 penetrating through the wing plates 230, and the catheter 400 connected with the first connector 2111 being clamped in the clamping grooves 231. In this way, the clamping grooves 231 can play a certain clamping and fixing role on the catheter 400, and can avoid the redundancy of the catheter 400 in the sleeve 100, and the redundant part of the catheter 400 is easily squeezed by the sleeve 100 and the plunger 200 to cause the catheter 400 to be excessively bent or form too many bending parts, therefore, the clamping grooves 231 for clamping the catheter 400 on the wing plates 230 are beneficial to the smooth discharge of the thrombus; at the same time, the wing plates 230 limit the cooperation with the sleeve 100 in the radial direction, which can further enhance the coaxiality of the plunger 200 and the sleeve 100, and ensure the stability of the movement of the plunger 200 and the sealing performance of the accommodation space.

[0062] In a further technical solution, please refer to Figure 3 and Figure 10 The sleeve 100 can comprise a first sleeve segment 110 and a second sleeve segment 120, the second sleeve segment 120 being connected to the distal end of the first sleeve segment 110, the aforementioned suction port 121 being arranged at the distal end of the second sleeve segment 120, the caliber of the first sleeve segment 110 being larger than the caliber of the second sleeve segment 120, and a first step surface 130 being formed between the first sleeve segment 110 and the second sleeve segment 120, along the direction of pushing the plunger body 210 by the plunger shaft 220, the wing plates 230 can limit the cooperation with the first step surface 130 to limit the maximum stroke of the plunger shaft 220 pushing the plunger body 210.

[0063] In the embodiments of the present application, please refer to Figures 13 to 14 The driving assembly 300 comprises a first arm 310, a second arm 320 and an elastic reset member 330, the first arm 310 and the second arm 320 being hingedly connected, the first arm 310 being hingedly connected with the sleeve 100, the second arm 320 being hingedly connected with the plunger 200, and the elastic reset member 330 being connected between the first arm 310 and the second arm 320, in this way, the entire driving assembly 300 is in the structure of a trigger, and the first arm 310 and the second arm 320 can be swung towards each other by pressing, the plunger 200 connected with the second arm 320 moving away from the suction port 121 to realize the suction of the thrombus in the blood vessel, and the elastic reset member 330 is elastically deformed in this process; and after the pressing force applied to the first arm 310 and the second arm 320 is removed, the elastic reset member 330 restores the deformation and applies a reset elastic force to the first arm 310 and the second arm 320, the plunger 200 connected with the second arm 320 moving towards the suction port 121 to compress the accommodation space, so that the thrombus in the accommodation space is discharged outward through the first connector 2111.

[0064] Based on the foregoing scheme, the first arm 310 and the second arm 320, the first arm 310 and the sleeve 100, and the second arm 320 and the plunger 200 are connected in a hinged manner, without screws, bolts or other threaded fasteners, making assembly simpler and reducing the use of parts and saving costs.

[0065] Specifically, referring to Figure 3 and Figure 13 , the outer wall of the sleeve 100 is provided with a protrusion 111 at both ends in the radial direction, the first arm 310 has two oppositely arranged clamping portions 311, and the clamping portions 311 are provided with mounting holes 312 corresponding to the protrusions 111, the mounting holes 312 are counterbores, and the bottom wall of the mounting holes 312 is further provided with an opening slot 312a penetrating the bottom wall. When the first arm 310 is installed with the sleeve 100, the protrusion 111 can be clamped into the mounting hole 312 through the opening slot 312a, and the protrusion 111 can be dislocated from the opening slot 312a by rotating and abutting against the bottom wall of the mounting hole 312, so as to prevent the first arm 310 from being separated from the sleeve 100. That is, the first arm 310 is rotatably sleeved on the protrusion 111 through the clamping portion 311 to realize hinging.

[0066] Please continue to refer to 2, Figure 4 and Figure 14 , the plunger 200 further includes a handle 240 arranged at the proximal end of the plunger shaft 220, and the upper end of the second arm 320 is provided with a shaft portion 321, and the handle 240 is sleeved on the shaft portion 321 to realize the hinging of the second arm 320 and the plunger 200.

[0067] In the embodiments of the present application, referring to Figure 13 and Figure 14 , in order to facilitate the assembly between the first arm 310, the second arm 320, the elastic reset member 330 and the plunger 200, the first arm 310 and the second arm 320 can be of a split structure, specifically, the first arm 310 can be formed by butt joint of two opposite first arm units, and the second arm 320 can be formed by butt joint of two opposite second arm units.

[0068] In order to avoid the use of threaded fasteners, one of the two first arm units is provided with a guide column 313, and the other is provided with a hole position matched with the guide column 313. Through the plug-in cooperation of the guide column 313 and the hole position, the synchronous movement of the two first arm units when the operation driving assembly 300 is operated can be realized, and the two second arm units are movably sleeved on the guide column 313 and are limited between the two first arm units. It should be understood that the cross section of the guide column 313 is non-circular, and exemplarily, the cross section of the guide column 313 can be a regular hexagon.

[0069] It should be noted that the terms "comprising," "including," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a... " does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element. Additionally, it should be noted that the scope of the methods and apparatus of the present embodiments are not limited by the order of the steps or the sequence for performing the steps, and can include performing the steps in different order, or substantially concurrently, or in reverse order, such as described, and can also include adding, omitting, or combining various steps. Additionally, features described in relation to certain examples can be combined in other examples.

[0070] The above description is merely that of the specific embodiments of the present application, but the scope of the present application is not limited thereto. It will be readily apparent to those skilled in the art that various changes and / or modifications can be made thereto without departing from the scope of the present application disclosed in the present application.

Claims

1. A thrombus aspiration device, characterized in that, Includes a sleeve (100), a plunger (200), and a drive assembly (300); wherein: The sleeve (100) is provided with a suction port (121) at its distal end. The plunger (200) is located inside the sleeve (100). The drive assembly (300) is connected to the plunger (200) to drive the plunger (200) to move along the axial direction of the sleeve (100). The plunger (200) includes a plunger body (210) and a plunger shaft (220) connecting the plunger body (210). The plunger body (210) has a mating structure (211) on its proximal side. The plunger shaft (220) includes a first rib (221) and a second rib (222) extending along the axial direction of the plunger (200). The first rib (221) and the second rib (222) are arranged intersectingly, and the distal end of the second rib (222) has a clearance opening (2223). At least a portion of the mating structure (211) is located within the clearance opening (2223).

2. The thrombus aspiration device according to claim 1, characterized in that, The second stiffener (222) includes a first stiffener (2221) and two spaced second stiffeners (2222), with the clearance opening (2223) formed between the two second stiffeners (2222), and the distal end of the first stiffener (2221) is connected to the proximal end of the two second stiffeners (2222).

3. The thrombus aspiration device according to claim 2, characterized in that, The far end of the first stiffener (221) is provided with a clearance hole (2211) that penetrates the first stiffener (221), and the clearance hole (2211) of the first stiffener (221) is opposite to the clearance opening (2223) formed between the two second stiffeners (2222).

4. The thrombus aspiration device according to claim 3, characterized in that, The second reinforcing rib (2222) is disposed along the edge of the clearance hole (2211) of the first rib plate (221).

5. The thrombus aspiration device according to any one of claims 1 to 4, characterized in that, The docking structure (211) is offset to the lower side of the plug (210); And / or, the docking structure (211) is biased to at least one side of the first stiffener (221); And / or, the first stiffener (221) is provided with arc-shaped protrusions (2212) at both ends in the height direction, and the arc-shaped protrusions (2212) are in contact with the inner wall of the sleeve (100).

6. The thrombus aspiration device according to any one of claims 1 to 4, characterized in that, It also includes a conduit (400), which includes at least a first section connected to the suction port (121) and a second section connected to the docking structure (211). Both the first section and the second section are provided with a one-way valve (500), and when the one-way valve (500) is in the open state, the opening area of ​​the one-way valve (500) is greater than or equal to the opening area of ​​the conduit (400).

7. The thrombus aspiration device according to claim 6, characterized in that, The docking structure (211) includes a first connector (2111) and a snap fastener (2112). The end of the conduit (400) is provided with a second connector (410). The conduit (400) is connected to the first connector (2111) through the second connector (410). The snap fastener (2112) is engaged with the second connector (410).

8. The thrombus aspiration device according to claim 7, characterized in that, The first connector (2111) is a conical column structure, and the large end of the first connector (2111) is connected to the plug (210). And / or, the plunger (200) further includes a wing plate (230) connected to the outside of the plunger shaft (220), the wing plate (230) being provided with a groove (231) corresponding to the first connector (2111), and the conduit (400) being inserted into the groove (231).

9. The thrombus aspiration device according to any one of claims 1 to 4, characterized in that, The drive assembly (300) includes a first arm (310), a second arm (320), and an elastic reset member (330). The first arm (310) and the second arm (320) are hinged together. The first arm (310) is hinged to the sleeve (100), and the second arm (320) is hinged to the plunger (200). The elastic reset member (330) connects the first arm (310) and the second arm (320).

10. The thrombus aspiration device according to claim 9, characterized in that, The outer wall of the sleeve (100) is provided with a protrusion (111), and the end of the first arm (310) is provided with a mounting hole (312). The first arm (310) is rotatably sleeved on the protrusion (111) through the mounting hole (312).

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