Thrombectomy assembly

Abstract

The application relates to a thrombus cutting assembly, which comprises a polymer member and a concentrator. The polymer member is in a columnar shape, one end of the polymer member is adapted to be fixed to the proximal end of a core wire of a cutting device, and the other end of the polymer member is provided with a clamping groove member. The concentrator is in a mesh structure with open ends, is sleeved outside the polymer member, and is fixed to the distal end of a cutting tube of the cutting device at one end. The other end of the concentrator is sleeved outside the clamping groove member and keeps the core wire of the cutting device fixed. The cutting tube of the cutting device is axially pushed to drive the concentrator to move axially, so that the concentrator is controlled to be filled or empty. In the thrombus pulling process, the self-spiral structure of the concentrator enables the proximal end of the concentrator to be retracted into a catheter while rotating, so that the thrombus which is not captured or not cut is completely separated from the blood vessel wall, the blocked area of the blood vessel is completely cleaned, the recanalization probability is improved, the blood vessel is reperfused in advance, the brain damage area of a patient is reduced, the operation time is shortened, and the prognosis of the patient is improved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a thrombus cutting component. Background Technology

[0002] Various types of thrombi can exist within the human blood vessels due to various reasons, involving both the arterial and venous systems. When thrombus fragments break off and circulate through the cardiovascular system, they can cause blockages in small distal blood vessels. In severe cases, this can lead to critical conditions such as pulmonary embolism and cerebral infarction, resulting in organ damage and potentially death. When drug treatment fails to eliminate thrombi in blood vessels, medical instruments are needed to break them up and remove them. Currently, the most common method is to use a hollow catheter inserted into the thrombus formation site during interventional surgery. Then, a suction device is used to draw the thrombus into the catheter and remove it from the body. However, due to different thrombus types, some thrombi have been formed for a long time and are very hard, making it difficult for the suction catheter to draw them in and remove them from the body. In such cases, a cup-shaped thrombectomy guidewire or other instruments are generally used to cut the thrombus and drag it out through the access route.

[0003] Existing thrombectomy guidewires or instruments are relatively thin and lack rigidity, making them ineffective at cutting and breaking up hard thrombi. Furthermore, the guidewires have low stiffness, leading to bending and kinking when passing through hard thrombi. This causes the guidewire tip to deviate during travel, resulting in damage to the vessel wall, potentially prolonging the procedure and placing an unnecessary burden on elderly patients. The difficulty and uncertainty of the procedure increase its complexity and risk. Therefore, avoiding damage to the vessel wall remains a pressing issue. Summary of the Invention

[0004] In view of this, this application proposes a thrombus cutting component to avoid damage to the blood vessel wall.

[0005] According to one aspect of this application, a thrombus cutting assembly is provided, comprising: a polymer component and a constrictor;

[0006] The polymer component is columnar, with one axial end suitable for fixing to the near end of the core wire of the cutting device, and the other end provided with a slot.

[0007] The convergent element is a mesh structure with openings at both ends, fitted over the polymer component. One end of the convergent element is fixed to the distal end of the cutting tube of the cutting device, and the other end is fitted over the slot component.

[0008] Keep the core wire of the cutting device fixed, push the cutting tube of the cutting device axially, and the cutting tube drives the condenser to move axially, controlling the condenser to be either filled or empty.

[0009] In a possible implementation, the side wall of the polymer member is provided with a mounting groove;

[0010] The mounting groove is helically arranged along the axial direction of the polymer member;

[0011] The converging device is matched with the mounting groove and can be contracted into the interior of the mounting groove.

[0012] In a possible implementation, the converging device is helically arranged as a whole;

[0013] The converging device is matched with the mounting groove and can be contracted into the interior of the mounting groove.

[0014] In a possible implementation, the converging device comprises a wire, a first wire base and a second wire base;

[0015] The first wire base and the second wire base are annular structures;

[0016] The wire is helically arranged and fixed at the first wire base and the second wire base at two ends.

[0017] In a possible implementation, the wire is more than two.

[0018] In a possible implementation, the wire is more than two.

[0019] In a possible implementation, the wire on the first wire base is arranged at equal intervals.

[0020] In a possible implementation, the wire is more than two.

[0021] In a possible implementation, the first wire base, the polymer member and the second wire base are coaxially arranged.

[0022] In a possible implementation, the first wire base is abutted and fixedly connected with the distal end of the cutting tube of the cutting device.

[0023] In a possible implementation, the first wire base is an annular structure and the axial cross section of the first wire base is trapezoidal;

[0024] The smaller end of the axial cross section area of the first wire base is fixedly connected with the distal end of the cutting tube of the cutting device;

[0025] The larger end of the axial cross section area of the first wire base is connected with the proximal end of the wire.

[0026] In a possible implementation, the second wire base is a ring structure, and an axial cross section of the second wire base is a trapezoid;

[0027] The larger end of the axial cross section area of the second wire base is connected with the distal end of the wire.

[0028] In a possible implementation, an outer sidewall of the clamping groove member is provided with a sliding groove in the circumferential direction, and the sliding groove is a ring groove matched with the second wire base;

[0029] The second wire base is embedded in the sliding groove of the clamping groove member and can rotate around the circumferential direction of the clamping groove member.

[0030] In a possible implementation, an axial cross section of the clamping groove member is a trapezoid;

[0031] The larger end of the cross section area of the clamping groove member is fixedly connected with the distal end of the polymer member;

[0032] The smaller end of the cross section area of the clamping groove member is provided with a developing head end.

[0033] In a possible implementation, the smaller end of the cross section area of the clamping groove member is provided with a developing mounting groove;

[0034] One end of the developing head end is provided with a developing mounting member matched with the developing mounting groove, and the developing head end is detachably connected with the developing mounting groove of the clamping groove member through the developing mounting member.

[0035] In a possible implementation, the developing mounting member is a 3 / 4 spherical structure.

[0036] In a possible implementation, the converging device is made of metal.

[0037] The thrombus cutting assembly has the following advantages: a polymer member is fixed on the flexible core wire at the delivery distal end of the cutting device, the diameter of the polymer member is adjustable to adapt to different inner diameters of the suction catheter, the length of the polymer member is adjustable to adapt to different lengths of the thrombus, the polymer member increases the toughness of the whole device and the passability of the thrombus, the mounting groove is provided on the polymer member, the retractable converging device is fixed in the mounting groove, the converging device can be expanded in the blood vessel to capture the thrombus, the adjustability of the converging device can keep the converging device in the expanded state, the self-spiral structure of the converging device can rotate when the proximal end of the converging device is retracted into the catheter, the thrombus that is not captured or cut is completely separated from the blood vessel wall, the occluded area of the blood vessel is completely cleaned, the recanalization probability is improved, the blood vessel is reperfused in advance, the brain damage area of the patient is reduced, the operation time is shortened, and the prognosis of the patient is improved.

[0038] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0039] The accompanying drawings are included to provide a further understanding of the exemplary embodiments, features and aspects of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and serve to explain the principles of the application.

[0040] Figure 1 A schematic diagram showing the main structure of a thrombus cutting assembly according to an embodiment of the application;

[0041] Figure 2 A schematic diagram showing the main structure of a proximal end of a concentrator according to an embodiment of the application;

[0042] Figure 3 A schematic diagram showing the main structure of a polymer piece according to an embodiment of the application;

[0043] Figure 4 A schematic diagram showing the main structure of a concentrator according to an embodiment of the application;

[0044] Figure 5 A schematic diagram showing another main structure of a thrombus cutting assembly according to an embodiment of the application;

[0045] Figure 6 A schematic diagram showing the main structure of a concentrator according to an embodiment of the application;

[0046] Figure 7 A schematic diagram showing the main structure of a film protection umbrella of a thrombus cutting assembly according to an embodiment of the application;

[0047] Figure 8 A schematic diagram showing the main structure of a woven protection umbrella of a thrombus cutting assembly according to an embodiment of the application;

[0048] Figure 9 A schematic diagram showing the main structure of a clamping slot piece according to an embodiment of the application;

[0049] Figure 10 A schematic diagram showing the main structure of a developer head end according to an embodiment of the application;

[0050] Figure 11 A schematic diagram showing the connection of a developer head end and a polymer piece according to an embodiment of the application. DETAILED DESCRIPTION

[0051] Various exemplary embodiments, features and aspects of the present application will be explained below in detail with reference to the drawings. The same reference numerals in different drawings denote the same or similar elements. Although various aspects of the embodiments are illustrated in the drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0052] It should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate relative or positional relationships based on the orientation or position shown in the drawings, and are used only for convenience of description or simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0053] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0054] The word "exemplary" herein means "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.

[0055] In addition, in order to better illustrate the present application, a large number of specific details are given in the specific embodiments below. Those skilled in the art should understand that the present application can also be implemented without some specific details. In some examples, methods, means, elements and circuits well known to those skilled in the art are not described in detail, in order to highlight the main idea of the present application.

[0056] As shown in Figures 1-4 The thrombus cutting assembly of the present application comprises a polymer member 100 and a concentrator 200. The polymer member 100 is columnar, and one end thereof is adapted to be fixed to the proximal end of a core wire 300 of a cutting device, and the other end is provided with a clamping groove member 700. The concentrator 200 is a mesh structure with open ends, and is sleeved outside the polymer member 100. One end of the concentrator 200 is fixed to the distal end of a cutting tube 400 of the cutting device, and the other end is sleeved outside the clamping groove member 700, and keeps the core wire 300 of the cutting device fixed. Axial pushing of the cutting tube 400 of the cutting device drives the concentrator 200 to move axially, and controls the concentrator 200 to be full or empty.

[0057] In this embodiment, a polymer component 100 is fixed on the flexible core wire 300 at the distal end of the cutting device. The polymer component 100 has a different diameter, which can be adjusted to adapt to aspiration catheters with different inner diameters. The polymer component 100 also has different lengths to accommodate thrombi of different lengths. The polymer component 100 increases the overall toughness and improves the passage of harder thrombi. An installation groove 110 is provided on the polymer component 100, and a retractable and adjustable condenser 200 is fixedly installed in the installation groove 110. The condenser 200 can be deployed in the blood vessel to capture the thrombus. Its adjustability allows the condenser 200 to remain in the deployed state. During the process of pulling the thrombus back, its self-spiral structure causes the proximal end to rotate when it is drawn into the catheter, completely separating any uncaptured or uncut thrombi from the blood vessel wall, achieving comprehensive clearing of the blocked area of ​​the blood vessel, thereby increasing the probability of recanalization, achieving blood vessel reperfusion earlier, reducing the area of ​​brain damage in the patient, shortening the operation time, and improving the patient's prognosis.

[0058] Among them, see Figure 5 When a cutting operation is required, the cutting tube 400 of the cutting device is pushed axially, which in turn moves the condenser 200 axially along the polymer component 100. During this process, the mesh structure of the condenser 200 can be controlled to be either filled or empty as needed. In the filled state, the condenser 200 can be tightly expanded to provide the necessary support and restraint for removing the thrombus, while in the empty state, it allows substances to flow or be released freely, facilitating movement within the blood vessel.

[0059] In one specific embodiment, see Figure 3 The polymer component 100 has an installation groove 110 on its side wall. The installation groove 110 is spirally arranged along the axial direction of the polymer component 100. The converging device 200 matches the installation groove 110 and can retract into the interior of the installation groove 110.

[0060] Furthermore, in this embodiment, a mounting groove 110 is provided on the side wall of the polymer component 100 to further enhance the integration and functionality between the polymer component 100 and the condenser 200. The mounting groove 110 provides a unique storage space for the condenser 200, allowing it to have a safe and compact storage location when it does not need to be fully extended to perform its constraint or support function.

[0061] Furthermore, in this embodiment, see... Figure 5The installation groove 110 is arranged in a spiral manner along the axial direction of the polymer member 100. The spiral structure increases the length of the installation groove 110, and provides more accommodation capacity for the retractor 200 in a limited space. The spiral shape helps to achieve a smoother transition when the retractor 200 is retracted into the groove, reducing friction and resistance. The spiral structure of the installation groove 110 can also guide the expansion and retraction process of the retractor 200, making the operation more accurate and controllable.

[0062] The spiral design of the installation groove 110 allows the retractor 200 to gradually penetrate along the spiral track of the groove during retraction, thereby further reducing the occupied space and increasing the compactness of the system.

[0063] In a specific embodiment, the overall shape of the retractor 200 is spiral, and the rotational direction of the retractor 200 is the same as that of the installation groove 110, which facilitates the retraction of the retractor 200 into the installation groove 110 on the polymer member 100. Specifically, the overall shape of the retractor 200 is spiral, which can smoothly retract into the groove along the same spiral track as the installation groove 110, maximizing the use of space and the compactness of the system, reducing the interference of the retractor 200 with the external environment, and protecting its structure from unnecessary wear or damage. When the relevant operation needs to be performed, the retractor 200 can quickly and accurately expand along the spiral track to restore to the working state, and its mesh structure can immediately play a supporting, restraining or guiding function to provide necessary support and protection for the cutting operation.

[0064] Further, in the present embodiment, the retractor 200 is in a retracted or empty state before being delivered to the thrombus position inside the blood vessel together with the polymer member 100, so that the polymer member 100 and the retractor 200 can pass through the thrombus, and then the retractor 200 is expanded to cut and collect the thrombus.

[0065] In a specific embodiment, referring to Figure 6, the collector 200 comprises: a wire 210, a first wire base 220 and a second wire base 230, the first wire base 220 and the second wire base 230 are annular structures, the wire 210 is spirally arranged, and the two ends are fixed with the first wire base 220 and the second wire base 230 respectively. Specifically, the wire 210 is woven or wound into a spiral shape, so that the collector 200 can exhibit excellent flexibility and controllability when it is expanded and contracted, and the wire 210 is made of a metal material with a certain elasticity to ensure stable performance and reliable working condition during long-term use. The first wire base 220 and the second wire base 230 are designed as annular structures, and the annular design ensures that the wire 210 can be neatly and orderly wound inside the mounting groove 110 of the high polymer part 100 when it is contracted, avoiding confusion and entanglement.

[0066] Further, in the embodiment, referring to Figure 6 In the collector 200, the two ends of the wire 210 are fixed with the first wire base 220 and the second wire base 230 respectively. When contraction is needed, the cutting pipe 400 of the cutting device is moved towards the proximal end by pulling, so that the two bases are relatively close, and the spiral wire 210 is gradually contracted between the two bases, and finally completely hidden in the mounting groove 110. Conversely, when expansion is needed, the two bases are relatively far apart, and the wire 210 gradually expands along the spiral track and recovers to the full state.

[0067] In a specific embodiment, referring to Figure 3 The wire 210 is more than two. The common action of multiple wires 210 can significantly improve the carrying capacity of the collector 200, and is not easy to break or fail, ensuring the stability and safety of the collector 200 as a whole. In addition, the spiral arrangement of multiple wires 210 makes the collector 200 more rapid and smooth when it is contracted and expanded. During the stress process, multiple wires 210 can share the stress together, thereby reducing the burden and wear of a single wire 210, prolonging the service life of the collector 200 and improving the durability of the system.

[0068] Further, in the embodiment, referring to Figure 6 and Figure 2 The two ends of each wire 210 are still fixed with the first wire base 220 and the second wire base 230 respectively. Multiple wires 210 are closely arranged together at the same spiral angle to form an integral structure. When contraction is needed, the two bases are relatively close, and all wires 210 are expanded synchronously, and when expansion is needed, the bases are relatively far apart, and the wires 210 are gradually recovered to the inside of the mounting groove 110 along their respective spiral tracks.

[0069] In a specific embodiment, referring to Figure 5 The rotation directions of the more than two wires 210 are the same.

[0070] In a specific embodiment, the wires 210 on the first wire base 220 are arranged at equal intervals. The wires 210 arranged at equal intervals can ensure uniform distribution on the first wire base 220, so as to distribute stress. When the condenser 200 is working, whether it bears tension or other external force, the wires 210 arranged at equal intervals can share stress together, avoid local stress concentration, and prolong the service life of the condenser 200. Since the wires 210 are arranged at equal intervals, they can maintain consistent rhythm and speed during contraction and expansion, and avoid winding of adjacent wires 210.

[0071] In a specific embodiment, the straight length of the wire 210 is greater than the axial length of the polymer member 100. When the wire 210 is expanded, since the straight length of the wire 210 can be greater than the length of the polymer member 100, it will diffuse towards the circumference of the polymer member 100, and thus the inside of the blood vessel will be in a state of filling, facilitating the removal of the thrombus.

[0072] In a specific embodiment, referring to Figure 6 , the first wire base 220, the polymer member 100, and the second wire base 230 are coaxially arranged. When the first wire base 220, the polymer member 100, and the second wire base 230 are coaxially arranged, it ensures the efficiency and stability of their functions. When the condenser 200 performs contraction or expansion action, it can rotate or move around the common axis, so as to ensure the synchronization and consistency of movement. The doctor can accurately control the condenser 200 and the polymer member 100 during the operation, and perform the operation to remove the thrombus.

[0073] Specifically, the coaxial arrangement enhances the stability and durability of the structure of the condenser 200, and the interaction and support relationship between them is more stable, which helps to resist external impact and vibration, protect the internal components of the condenser 200 from damage, and thus prolong the service life.

[0074] In a specific embodiment, the first wire base 220 abuts against the distal end of the cutting tube 400 of the cutting device, and is fixedly connected. The proximal end of the cutting tube 400 can be controlled to rotate circumferentially, so as to control the circumferential rotation of the first wire base 220 and the condenser 200.

[0075] In a specific embodiment, referring to Figure 2, the first wire base 220 is annular structure, and the axial cross section of the first wire base 220 is trapezoidal, the smaller end of the axial cross section area of the first wire base 220 is fixedly connected with the distal end of the cutting pipe 400, and the larger end of the axial cross section area of the first wire base 220 is connected with the proximal end of the wire 210. The first wire base 220 is used for fixing one end of the wire 210, and is fixedly connected with the distal end of the cutting pipe 400, and the axial direction is isosceles trapezoidal, which is convenient for passing through the thrombus.

[0076] The smaller end of the axial cross section area of the first wire base 220 is matched with the distal end of the cutting pipe 400, and can be fixed by mechanical die casting or welding, and the larger end of the axial cross section area of the first wire base 220 can increase the number of wires 210 by increasing the diameter of the annular structure.

[0077] In a specific embodiment, referring to Figure 2 and Figure 6 , the second wire base 230 is annular structure, and the axial cross section of the second wire base 230 is trapezoidal, and the larger end of the axial cross section area of the second wire base 230 is connected with the distal end of the wire 210. The second wire base 230 also adopts an annular structure and is arranged at the other end of the wire 210, and the second wire base 230 is isosceles trapezoidal in cross section, which is convenient for passing through the thrombus and will not touch the thrombus.

[0078] The larger end of the axial cross section area of the second wire base 230 is used for fixing the wire 210, and the smaller end of the cross section area is convenient for passing through the thrombus, and a developing member can be arranged at the smaller end of the cross section area of the second wire base 230.

[0079] In a specific embodiment, referring to Figure 6 , Figure 9 and Figure 10 , the outer side wall of the clamping groove member 700 is provided with a sliding groove 710 in the circumferential direction, the sliding groove 710 is an annular groove matched with the second wire base 230, the second wire base 230 is embedded in the sliding groove 710 of the clamping groove member 700 and can rotate around the clamping groove member 700. The clamping groove member 700 is arranged at the end of the first wire base 220 away from the high polymer member 100, and the annular structure of the second wire base 230 can be sleeved outside the clamping groove member 700 and located in the sliding groove 710 opened on the clamping groove member 700 and can rotate in the circumferential direction relative to the sliding groove 710.

[0080] Specifically, by rotating the cutting pipe 400 and fixing the core wire 300, the high polymer member 100 is in a fixed state, and rotating the cutting pipe 400 makes the convergent device 200 rotate in the circumferential direction.

[0081] In this embodiment, referring to Figure 9, the axial section of the clamping groove part 700 is trapezoidal, which is convenient for passing through the thrombus. The larger end of the cross-sectional area of the clamping groove part 700 is fixedly connected with the distal end of the high polymer part 100, and the smaller end of the cross-sectional area of the clamping groove part 700 is provided with the developing head end 500. The trapezoidal cross-section of the clamping groove part 700 presents a gradually changing width or thickness in the axial direction, and the other end of the clamping groove part 700, i.e. the smaller end of the cross-sectional area, integrates the developing head end 500. The doctor clearly observes the position of the instrument and the thrombus through the medical imaging equipment during the operation, which greatly improves the accuracy and safety of the operation. The developing head end 500 is arranged at the smaller end of the cross-sectional area of the clamping groove part 700, which is convenient for flexible shuttle in the blood vessel and can accurately position when needed, ensuring the accuracy of the operation.

[0082] In a specific embodiment, the smaller end of the cross-sectional area of the clamping groove part 700 is provided with a developing installation slot 720, one end of the developing head end 500 is provided with a developing installation part 510, the developing installation part 510 matches the developing installation slot 720, and the developing head end 500 is detachably connected with the developing installation slot 720 of the clamping groove part 700 through the developing installation part 510. The presence of the developing installation slot 720 provides an accurate and stable platform for the installation and fixation of the developing head end 500, so that the whole structure is compact while also having high flexibility and maintainability.

[0083] Among them, through the detachable connection mode of the developing installation part 510 and the developing installation slot 720, the developing head end 500 can be easily combined or separated with the clamping groove part 700, and can be selected to be used or not used according to the needs.

[0084] Further, referring to Figure 10 The developing installation part 510 is a 3 / 4 spherical structure, and the developing installation slot 720 is a matching structure, which can complete the installation and disassembly of the developing head end 500 and the clamping groove part 700 by adopting the buckle mode.

[0085] According to the above-mentioned embodiments, the polymer part 100 formed by high polymer injection molding has uniform mounting grooves 110 on the part, the collector 200 has a plurality of wire 210 and wire 210 seat at the head and tail, the wire 210 of the collector 200 matches the groove on the polymer part 100 and is sleeved outside the polymer part 100, and the number of the wire 210 is equal to or multiple of the number of the mounting grooves 110. The instrument distal end is provided with a developing head end 500, which is made of a wire with developing performance, and a delivery hypotube made of metal pipe material is sleeved outside the delivery core wire 300 and can freely slide and rotate, the distal end of which is hard connected with the first wire seat 220, and there is a clamping groove part 700 between the developing head end 500 of the instrument distal end and the polymer part 100, and the outer side wall of the clamping groove part 700 is provided with an annular sliding groove 710, the distal end wire seat 210 of the collector 200 matches and inlays the sliding groove 710 and can rotate along the axis of the instrument. The cutting device is provided with a detachable controller 600, which can control the fixation and rotation of the core wire 300 and the cutting tube 400.

[0086] Further, the polymer part 100 and the developing head end 500 improve the overall rigidity of the instrument when passing through the narrow blocked blood vessel during the instrument delivery process, so that the delivery force can better penetrate the entire instrument, the spiral structure of the polymer part 100 can make the instrument obtain stronger rotation through performance when necessary by the operation of the hypotube hard connected therewith, if the head end of the polymer part 100 passes through the blocked blood vessel, a plurality of groove bodies on the main body can quickly form a flow-through channel to realize the rapid recanalization of blood flow during the operation, which not only can realize a certain degree of immediate reperfusion, but also can achieve a certain thrombolytic effect by using flowing blood, that is, the prognosis of the patient can be improved, the developing head end 500 not only has developing effect, but also can be shaped into a specific shape when necessary to improve the through performance of the thrombus. The traditional mechanical thrombectomy stent only pushes and pulls the thrombus in the front and rear directions of the blood flow, and the thrombus generally distributes along the blood flow direction to the distal end of the blood vessel, and sometimes needs to be repeatedly taken out for several times to completely strip the thrombus from the blood vessel wall. After the instrument of the present application is deployed at the lesion, the collector 200 can be controlled and operated by pushing and pulling or rotating the hypotube. The rear knob of the controller 600 can rotate and clench the delivery core wire 300, the front knob can clench and design a rotating mechanism for the hypotube, which can continuously rotate after clenching the hypotube, the center push rod and the front and rear knobs are provided with a linkage mechanism, when the front knob enters the clenching state, the center push rod can be used to push the hypotube forward after the rear knob clutches the delivery core wire 300, so that the collector 200 originally attached to the groove body of the polymer part 100 is opened, allowing the operator to adjust the inflation degree of the collector 200 according to the diameter of the target blood vessel, the adjustable outer diameter size of the collector 200 can better adapt to the size of the target blood vessel, and the stent size can also be moderately contracted during the withdrawal process to reduce the risk of blood vessel injury;

[0087] Further, since the hypotube head end is hard connected with the collector 200 tail end, the wire 210 seat of the collector 200 head end can rotate in the sliding slot along the instrument axis, and the hypotube can be rotated alone by continuously rotating the front knob, so that the expanded collector 200 continuously rotates along the blood vessel lumen and peels off the thrombus adhered to the blood vessel wall in the blood vessel lumen, especially the partially organized or hard fibrin-rich and viscous thrombus, from the blood vessel wall, reduces the adhesion of the thrombus to the blood vessel wall, and then the thrombus is pulled back, which can greatly improve the recanalization probability, so that the patient's brain can obtain high blood perfusion in the first time, and the patient's prognosis can be improved.

[0088] According to the above embodiment, in a specific embodiment, referring to Figure 7 Further comprising: a thin film protection umbrella 800, the thin film protection umbrella 800 is a middle-hole conical structure, and both ends are open, and is installed inside the collector 200 and located on the second wire base 230. Specifically, the larger opening end of the thin film protection umbrella 800 faces the first wire base 220, and the smaller opening end faces the second wire base 230 and is detachably connected with the second wire base 230.

[0089] In this embodiment, the height of the thin film protection umbrella 800 is 1 / 4-1 / 3 of the height of the high polymer part 100. During use, since the smaller opening end of the thin film protection umbrella 800 faces the second wire base 230, it is also convenient to pass through the thrombus, and during the thrombus extraction process, the wire 210 of the collector 200 is unfolded, and the conical structure of the thin film protection umbrella 800 can provide a certain supporting force for the wire 210, and can resist the thrombus, facilitating cutting and extraction.

[0090] According to the above embodiment, in a specific embodiment, referring to Figure 8 Further comprising: a woven protection umbrella 900, the woven protection umbrella 900 is a middle-hole conical structure, and both ends are open, and is installed inside the collector 200 and located on the second wire base 230. Specifically, the larger opening end of the woven protection umbrella 900 faces the first wire base 220, and the smaller opening end faces the second wire base 230 and is detachably connected with the second wire base 230.

[0091] The woven protective umbrella 900 is of woven structure, the small opening end is provided with an attraction ring, the woven wire is woven in a conical structure towards the first wire base 220, the polymer member 100 is pre-added with a plurality of magnetic poles in the injection molding production process, the head end of the woven wire of the woven protective umbrella 900 is fixed on an attraction ring made of martensitic stainless steel, the woven protective umbrella 900 is sleeved from the distal end of the device, so that the attraction ring is attracted to the corresponding magnetic pole in the polymer member 100 and is fixed on the device, the large expansion opening of the woven protective umbrella 900 is designed as a four-part development, has a development function, and the clamping member in the development interval is clamped with the wire 210 corresponding to the collector 200, so that the protective umbrella is synchronized with the collector 200 when the collector 200 is opened and closed. Further, the development head end 500 of the distal end of the thrombectomy device can be made into a detachable modular design, which can be flexibly adjusted according to the operation process, the clamping groove member 700 is cut and the polymer member 100 is bonded at the proximal end of the development head end 500, so that the development head end 500 can be replaced in the operation.

[0092] Specifically, the thrombectomy device is provided with a protective umbrella, including a film protective umbrella 800 and a woven protective umbrella 900, the thrombus cut off by the collector 200 in the operation will be captured by the protective umbrella, so as to prevent the occlusion of the small blood vessels at the distal end, further, the protective umbrella can adopt a modular design, the magnetic poles buried in the polymer member 100 can generate appropriate attractive force with the attraction ring of the protective umbrella, so that the operator can implement different coping strategies according to the disease or according to the actual situation in the operation, for example, when the thrombus is a large hard thrombus, a protective umbrella with larger porosity can be installed before taking the thrombus again to reduce the influence on the blood flow in the operation, if a protective umbrella with smaller porosity is needed to prevent small thrombus from escaping, the operator can directly replace and use it. Moreover, the interaction between the thrombus and the thrombectomy device is mainly adhesive, not only mechanical (direct mechanical interaction of the thrombectomy device on the thrombus), the modular design which can be detached and reinstalled makes it easier to clean when the device needs to be reused, reduces the waiting time in the operation, and improves the operation efficiency; and the doctor can shape the development head end 500 of the device to improve its passability to the thrombus or branch blood vessels in the operation, as the thrombus is gradually removed, the too long development head end 500 may cause damage to the inner wall of the blood vessel when the device is repeatedly used for thrombus removal, the operator can remove the development head end 500 and load a shorter development head end 500 or a development point without affecting the overall function of the device. The modular design which can be detached and replaced can obtain different functions using the same set of devices, greatly increases the functionality of the device on the premise of increasing a small part of the cost, provides more choices for the operator, thereby improving the operation efficiency, reduces the cost and risk borne by the patient, and improves the prognosis of the patient.

[0093] Having described various embodiments of the application, it is to be understood that the above description is meant not to limit and not to encompass all of the possible embodiments. Many modifications and variations of this application can be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. It is intended that the scope of the application be defined by the scope of the patent and by the claims as allowed by the patent office, which can include adaptations based on the description, equivalents, and / or substitutions of elements individually or collectively to the entire disclosure.

Claims

1. A thrombus-cutting assembly, characterized in that, The application relates to a high-molecular element and a collector. The high-molecular element is in a columnar shape, one end of the high-molecular element is adapted to be fixed to the proximal end of a core wire of a cutting device, and the other end of the high-molecular element is provided with a clamping groove element. The collector is in a mesh structure with open ends, the collector is sleeved outside the high-molecular element, one end of the collector is sleeved outside the clamping groove element, the other end of the collector is fixed to the distal end of a cutting tube of the cutting device, and the distal end of the cutting tube is spaced apart from the high-molecular element by a preset distance. The core wire of the cutting device is fixed, the cutting tube of the cutting device is axially pushed, the cutting tube drives the collector to move axially, and the collector is controlled to be filled or empty. An installation groove is formed in the side wall of the high-molecular element, the installation groove is spirally arranged along the axial direction of the high-molecular element, the collector is matched with the installation groove and can be contracted into the installation groove, the wire of the collector is restored to a filled state along a spiral track, or the wire of the collector is contracted into the installation groove of the high-molecular element. The collector is in a spiral shape, and the rotation direction of the collector is the same as that of the installation groove. The collector comprises a wire, a first wire base and a second wire base.

2. The thrombectomy assembly of claim 1, wherein, The first wire base and the second wire base are both in ring structures. The wire is in a spiral shape, and two ends of the wire are respectively fixed to the first wire base and the second wire base. The wire is more than two.

3. The thrombectomy assembly of claim 2, wherein, The rotation directions of the more than two wires are the same.

4. The thrombectomy assembly of claim 3, wherein, The wires on the first wire base are arranged at equal intervals.

5. The thrombectomy assembly of claim 4, wherein, The straightened length of the wire is greater than the axial length of the high-molecular element.

6. The thrombectomy assembly of claim 2, wherein, The first wire base, the high-molecular element and the second wire base are coaxially arranged.

7. The thrombectomy assembly of claim 2, wherein, The first wire base is in abutment with the distal end of the cutting tube of the cutting device and is fixedly connected.

8. The thrombectomy assembly of claim 7, wherein, The first wire base is in a ring structure, and the axial cross section of the first wire base is in a trapezoidal shape.

9. The thrombectomy assembly of claim 8, wherein, The smaller end of the axial cross section area of the first wire base is fixedly connected with the distal end of the cutting tube of the cutting device. The larger end of the axial cross section area of the first wire base is connected with the proximal end of the wire. The second wire base is in a ring structure, and the axial cross section of the second wire base is in a trapezoidal shape.

10. The thrombectomy assembly of claim 7, wherein, The larger end of the axial cross section area of the second wire base is connected with the distal end of the wire. The outer side wall of the clamping groove element is circumferentially provided with a sliding groove, the sliding groove is an annular groove and is matched with the second wire base.

11. The thrombectomy assembly of claim 10, wherein, The second wire base is embedded in the sliding groove of the clamping groove element and can rotate around the clamping groove element. The axial cross section of the clamping groove element is in a trapezoidal shape.

12. The thrombectomy assembly of claim 11, wherein, The larger end of the cross section area of the clamping groove element is fixedly connected with the distal end of the high-molecular element. The smaller end of the cross section area of the clamping groove element is provided with a developing head end. The smaller end of the cross section area of the clamping groove element is provided with a developing installation groove.

13. The thrombectomy assembly of claim 12, wherein, One end of the developing head end is provided with a developing installation element, the developing installation element is matched with the developing installation groove, and the developing head end is detachably connected with the developing installation groove of the clamping groove element through the developing installation element. The developing installation element is in a 3 / 4 spherical structure.

14. The thrombectomy assembly of claim 13, wherein, ​ 15. The thrombectomy assembly of claim 1, wherein, The converging device is made of metal.

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