Thrombus cutting system

Abstract

The thrombus cutting system comprises a polymer part, a bundling device, a core wire, a cutting pipe and a controller, the polymer part is columnar, the bundling device is of a net structure wound by multiple wires and covers the polymer part, one end of the bundling device is rotatably connected with one axial end of the polymer part, and the cutting pipe is of a hollow tubular structure. One axial end is fixed with the other axial end of the bundling device, the other end freely extends, the core wire is installed in the cutting pipe, one axial end is fixed with one axial end of the macromolecule part, the other end freely extends, the controller is arranged at the free ends of the cutting pipe and the core wire, and a preset distance is arranged between the far end of the cutting pipe and the near end of the macromolecule part. The core wire is kept fixed, the cutting tube is axially pushed to control the collecting device to be unfolded, in the thrombus pulling-back process, the self-spiral structure of the thrombus collecting device rotates when the near end of the thrombus collecting device is collected into the catheter, the thrombus which is not captured or not cut is thoroughly stripped from the blood vessel wall, and comprehensive cleaning of the blood vessel blocking area is achieved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a thrombus cutting system. 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 thrombectomy system that avoids damage to blood vessels during thrombectomy procedures.

[0005] According to one aspect of this application, a thrombus cutting system is provided, comprising: a polymer component, a catcher, a core wire, a cutting tube, and a controller;

[0006] The polymer component is columnar;

[0007] The converging device is a multi-filament wound mesh structure, which covers the outside of the polymer component, and one end is rotatably connected to the axial end of the polymer component.

[0008] The cutting tube is a hollow tubular structure, with one axial end fixed to the other axial end of the converging device, and the other end extending freely.

[0009] The core wire is installed inside the cutting tube, with one axial end fixed to one axial end of the polymer component and the other end extending freely.

[0010] The controller is arranged at the free end of the cutting tube and the core wire, the distal end of the cutting tube is spaced apart from the proximal end of the polymer member by a preset distance, the core wire is kept fixed, the cutting tube is axially pushed, and the constrictor is controlled to be in a full state or an empty state.

[0011] In a possible implementation, when the distal end of the cutting tube is spaced apart from the proximal end of the polymer member by a preset distance, the constrictor is in an empty state, and when the distal end of the cutting tube abuts against the proximal end of the polymer member, the constrictor is in a full state.

[0012] The diameter of the cutting tube is smaller than the circumferential diameter of the polymer member.

[0013] In a possible implementation, a groove is arranged on the side wall of the polymer member.

[0014] The mounting groove is arranged spirally along the axial direction of the polymer member.

[0015] The constrictor is matched with the mounting groove, and the cutting tube is rotated to drive the constrictor to shrink into the mounting groove.

[0016] In a possible implementation, the constrictor is spirally arranged as a whole.

[0017] The constrictor has the same helical direction as the mounting groove.

[0018] In a possible implementation, the controller comprises a control housing, a core wire fixing member and a cutting tube push button.

[0019] The control housing is a hollow housing structure.

[0020] The core wire fixing member is arranged on the control housing and is clamped to the free end of the core wire.

[0021] The cutting tube push button is arranged on the control housing and is connected to the proximal end of the cutting tube, and can axially push the cutting tube.

[0022] In a possible implementation, the controller further comprises a cutting tube rotating member.

[0023] The cutting tube rotating member is arranged on the control housing and is clamped to the free end of the cutting tube, and the cutting tube is rotationally connected to the control housing and can be rotationally driven.

[0024] In a possible implementation, the constrictor comprises a wire, a first wire base and a second wire base.

[0025] The first wire base and the second wire base are annular structures.

[0026] The wire is helical, and two ends are fixed with the first wire base and the second wire base respectively, and the wire is more than two, and the rotation direction of the more than two wires is the same;

[0027] The first wire base is annular structure, and the axial cross section of the first wire base is trapezoidal, 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, and the larger end of the axial cross section area of the first wire base is connected with the proximal end of the wire;

[0028] The second wire base is annular structure, and the axial cross section of the second wire base is trapezoidal, 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 piece is provided with a sliding groove in the circumferential direction, the sliding groove is an annular groove matched with the second wire base, and the second wire base is embedded in the sliding groove of the clamping groove piece and can rotate around the clamping groove piece.

[0029] In a possible implementation, the wires on the first wire base are arranged at equal intervals.

[0030] In a possible implementation, the straight length of the wire is greater than the axial length of the high polymer piece.

[0031] In a possible implementation, the first wire base, the high polymer piece and the second wire base are coaxially arranged.

[0032] The thrombus cutting system has the following beneficial effects: a high polymer piece is fixed on the flexible core wire at the delivery distal end of the cutting device, the high polymer piece increases the toughness of the whole and the passability of the harder thrombus, an installation groove is formed in the high polymer piece, a retractable and adjustable buncher is fixedly installed in the installation groove, the buncher can be unfolded in the blood vessel and capture the thrombus, the adjustability of the buncher can keep the buncher unfolded, and in the process of pulling back the thrombus, the self-spiral structure of the buncher enables the proximal end of the buncher to be retracted into the catheter while rotating, so that 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.

[0033] 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

[0034] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate examples of the application, and together with the description, serve to explain the principles of the application.

[0035] Figure 1 A schematic diagram showing the main structure of a thrombectomy system according to an embodiment of the application;

[0036] Figure 2 A schematic diagram showing the main structure of a proximal end of a concentrator according to an embodiment of the application;

[0037] Figure 3 A schematic diagram showing the main structure of a polymer according to an embodiment of the application;

[0038] Figure 4 A schematic diagram showing the main structure of a concentrator according to an embodiment of the application;

[0039] Figure 5 A schematic diagram showing another main structure of a thrombectomy system according to an embodiment of the application;

[0040] Figure 6 A schematic diagram showing the main structure of a concentrator according to an embodiment of the application;

[0041] Figure 7 A schematic diagram showing the main structure of a clamping slot according to an embodiment of the application;

[0042] Figure 8 A schematic diagram showing the main structure of a developer head end according to an embodiment of the application;

[0043] Figure 9 A schematic diagram showing the connection of a developer head end and a polymer according to an embodiment of the application;

[0044] Figure 10 A schematic diagram showing the structure of a controller according to an embodiment of the application. DETAILED DESCRIPTION

[0045] Various example embodiments, features and aspects of the application will be described in detail below with reference to the accompanying drawings. The same reference numbers in different drawings represent 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.

[0046] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0048] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0049] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0050] Figure 1 A schematic diagram of the main structure according to an embodiment of this application is shown. Figure 1 As shown, the thrombus cutting system of this application embodiment includes: a polymer component 100, a constrictor 200, a core wire 300, a cutting tube 400, and a controller 600. The polymer component 100 is columnar, and the constrictor 200 is a multi-filament wound mesh structure covering the outside of the polymer component 100. One end of the constrictor 200 is rotatably connected to one axial end of the polymer component 100. The cutting tube 400 is a hollow tubular structure. One axial end of the constrictor 200 is fixed to the other axial end of the constrictor 200, and the other end extends freely. The core wire 300 is installed inside the cutting tube 400. One axial end of the core wire 300 is fixed to one axial end of the polymer component 100, and the other end extends freely. The controller 600 is located at the free ends of the cutting tube 400 and the core wire 300. The distal end of the cutting tube 400 is spaced at a preset distance from the proximal end of the polymer component 100 to keep the core wire 300 fixed. The cutting tube 400 is pushed axially to control the constrictor 200 to be in a filled state or an empty state.

[0051] In this embodiment, a polymer member 100 is fixed on the delivery distal flexible core wire 300 of the cutting device, which increases the toughness of the whole and the passability to the harder thrombus. The polymer member 100 is provided with a mounting groove 110, and a retractable and adjustable buncher 200 is fixedly installed in the mounting groove 110. The buncher 200 can be unfolded in the blood vessel and capture the thrombus. The adjustability of the buncher 200 can keep the buncher 200 in an unfolded state. During the process of pulling back the thrombus, the self-spiral structure of the buncher 200 makes the proximal end of the buncher 200 enter the catheter with a rotating action, which completely separates the thrombus that is not captured or not cut by the cutting device from the blood vessel wall, realizes the comprehensive cleaning of the blocked area of the blood vessel, improves the recanalization probability, realizes the blood vessel reperfusion in advance, reduces the brain damage area of the patient, shortens the operation time, and improves the prognosis of the patient.

[0052] In this embodiment, the polymer member 100 is in a columnar shape, which is used to improve the toughness of the cutting device and increase the passability to the harder thrombus. The mesh structure of the buncher 200 is wound by multiple wires, which can be unfolded or retracted by rotating one end relative to the other end, so as to fill or empty the inside of the blood vessel, so as to take out the thrombus or pass through the thrombus. The cutting tube 400 is a hollow tubular structure, which is convenient for the core wire 300 to pass through, and the tubular structure is also convenient for circumferential rotation. The free end is convenient for circumferential rotation by using the controller 600. The core wire 300 is installed in the cutting tube 400, and one end is closely connected with the axial end of the polymer member 100, which ensures the synchronous movement between the core wire 300 and the polymer member 100. The controller 600 is arranged near the free end of the cutting tube 400 and the core wire 300, which fixes the core wire 300 in the circumferential direction and realizes the circumferential rotation of the cutting tube 400.

[0053] In a specific embodiment, the mounting groove 110 is provided on the side wall of the polymer member 100, and the mounting groove 110 is arranged in the axial direction of the polymer member 100. The buncher 200 is matched with the mounting groove 110 and can be retracted into the mounting groove 110.

[0054] Further, in this embodiment, the mounting groove 110 is provided on the side wall of the polymer member 100, which further enhances the integration and functionality between the polymer member 100 and the buncher 200. The provision of the mounting groove 110 provides a unique storage space for the buncher 200, so that the buncher 200 can have a safe and compact storage position when it does not need to be completely unfolded to perform its constraint or support function.

[0055] Further, in the embodiment, the mounting 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 mounting 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 110, reducing friction and resistance. The spiral structure of the mounting groove 110 can also guide the expansion and retraction process of the retractor 200, making the operation more accurate and controllable.

[0056] In the spiral design of the mounting groove 110, the retractor 200 can gradually penetrate along the spiral track of the groove 110 during retraction, thereby further reducing the occupied space and increasing the compactness of the system.

[0057] In the embodiment, the polymer member 100 is columnar in shape, with both ends being tapered, and the cross-sectional area gradually decreases towards the middle of the polymer member 100. When the retractor 200 is in an empty or retracted state, the distal end of the polymer member 100 is pointed, facilitating the passage through the thrombus, so that the polymer member 100 and the retractor 200 are located on the other side of the thrombus, and then the retractor 200 is expanded to remove the thrombus.

[0058] In a specific embodiment, the retractor 200 is spiral in shape, and the direction of rotation of the retractor 200 is the same as that of the mounting groove 110, facilitating the retraction of the retractor 200 into the mounting groove 110 formed in the polymer member 100. Specifically, the retractor 200 is spiral in shape and can smoothly retract into the mounting groove 110 along the same spiral track, 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 then play the functions of support, constraint or guidance, providing necessary support and protection for the cutting operation.

[0059] Further, in the 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, facilitating the passage of the polymer member 100 and the retractor 200 through the thrombus, and then expanding the retractor 200 to cut and collect the thrombus.

[0060] In a specific embodiment, the controller 600 comprises a control housing, a core wire fixing member 620, a cutting tube pushing knob 630 and a cutting tube rotating member 640. The control housing is a hollow housing structure. The core wire fixing member 620 is arranged on the control housing and is connected to the free end of the core wire 300. The cutting tube rotating member 640 is arranged on the control housing 610 and is connected to the free end of the cutting tube 400. The cutting tube 400 is rotationally connected to the control housing 610 and can be driven to rotate circumferentially.

[0061] The cutting tube pushing knob 630 is arranged on the control housing 610 and can slide along the length direction of the controller 600. The cutting tube pushing knob 630 is connected to the proximal end of the cutting tube 400. The sliding direction of the cutting tube 400 is the same as the axial direction of the cutting tube 400. Therefore, when the cutting tube pushing knob 630 is slid, the cutting tube 400 can slide together with the cutting tube pushing knob 630.

[0062] Specifically, when the wire 210 of the collector 200 is retracted into the mounting groove 110 of the polymer member 100, the distal end of the cutting tube 400 is spaced apart from the proximal end of the polymer member 100 by a predetermined distance. When the cutting tube pushing knob 630 is pushed towards the polymer member 100, the cutting tube 400 and the collector 200 move towards the distal end. Since the distal end of the collector 200 is connected to the distal end of the polymer member 100, when the proximal end of the collector 200 slides towards the distal end of the collector 200, the wire 210 of the collector 200 is unfolded from the inside of the mounting groove 110. When the proximal end of the collector 200 slides towards the controller 600, the wire 210 of the collector 200 is retracted into the inside of the mounting groove 110.

[0063] In the embodiment, the controller 600 is composed of the control housing 610, the core wire fixing member 620 and the cutting tube rotating member 640, which together realize efficient and accurate operation control. The control housing 610 adopts a hollow housing structure design, which ensures the lightweight of the controller 600 and provides sufficient space for the layout of the internal mechanical structure. The core wire fixing member 620 stably and firmly connects the free end of the core wire 300, which can fix the polymer member 100 at the distal end and avoid circumferential rotation. The cutting tube rotating member 640 is connected to the free end of the cutting tube 400, which enables the cutting tube 400 to rotate circumferentially under the drive of the controller 600.

[0064] The core wire fixing member 620 is a ring-shaped claw structure and is coaxially arranged with the control housing 610. The core wire fixing member 620 can grip the core wire 300 and fix the core wire 300, so that the core wire 300 cannot rotate circumferentially and slide axially.

[0065] The cutting tube rotating member 640 is a ring-shaped claw structure coaxially arranged with the control housing 610 and can rotate circumferentially relative to the control housing 610 of the columnar structure. After the cutting tube rotating member 640 fixes the cutting tube 400, the cutting tube 400 is driven to rotate circumferentially relative to the core wire 300 by rotating the cutting tube rotating member 640, so as to expand the constriction device 200.

[0066] It should be noted that the cutting tube push button 630 is non-rigidly fixedly connected with the cutting tube 400. The cutting tube push button 630 can drive the cutting tube 400 to move axially by means of an intermediate gear, but remains rotatable circumferentially. Specifically, the cutting tube rotating member 640 is a ring-shaped claw structure and can drive the cutting tube 400 to rotate circumferentially without affecting the axial movement of the cutting tube 400. The cutting tube 400 can be driven to move axially by pushing the cutting tube push button 630 by means of an intermediate gear. The circumferential rotation and the axial movement of the cutting tube 400 do not affect each other.

[0067] In a specific embodiment, the constriction device 200 includes 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 helical and has two ends fixed to the first wire base 220 and the second wire base 230, respectively. Specifically, the wire 210 is woven or wound into a helix, so that the constriction device 200 can exhibit excellent flexibility and controllability when expanded and contracted. 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. The annular design ensures that the wire 210 can be neatly and orderly wound inside the mounting groove 110 of the high polymer member 100 when contracted, avoiding disorder and entanglement.

[0068] Further, in the constriction device 200, the two ends of the wire 210 are fixed to the first wire base 220 and the second wire base 230, respectively. When contraction is needed, the cutting tube 400 of the cutting device is moved towards the proximal end by pulling, so that the two bases are relatively close to each other. The helical 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 away from each other, and the wire 210 is gradually expanded along the helical trajectory and restored to the full state.

[0069] In a specific embodiment, referring to Figure 3, the number of the wires 210 is more than two. The wires 210 can work together to significantly improve the carrying capacity of the collector 200, and the wires 210 are not easy to break or fail, which ensures the stability and safety of the collector 200 as a whole. In addition, the spiral arrangement of the wires 210 makes the collector 200 more rapid and smooth when it is contracted and expanded. During the stress process, the 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.

[0070] Further, in the embodiment, the two ends of each wire 210 are still fixed with the first wire base 220 and the second wire base 230 respectively. The wires 210 are arranged closely together at the same spiral angle to form an integral structure. When contraction is needed, the two bases are relatively close to each other, and all the wires 210 are expanded synchronously. When expansion is needed, the bases are relatively far away from each other, and the wires 210 are gradually retracted to the inside of the mounting groove 110 along the respective spiral tracks.

[0071] In a specific embodiment, the wires 210 are arranged in the same direction.

[0072] In a specific embodiment, the wires 210 are arranged in the same direction.

[0073] 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, thereby distributing the stress. When the collector 200 is working, whether it is subjected to tension or other external force, the wires 210 arranged at equal intervals can share the stress together, avoid local stress concentration, and prolong the service life of the collector 200. Because 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.

[0074] In a specific embodiment, the straight length of the wire 210 is greater than the axial length of the high polymer member 100. When the wire 210 is expanded, because the straight length of the wire 210 can be greater than the length of the high polymer member 100, the wire 210 will spread towards the circumference of the high polymer member 100, and the inside of the blood vessel will be in a state of filling, which is convenient for removing the thrombus.

[0075] In a specific embodiment, 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, the efficiency and stability of their functions are ensured, and when the retractor 200 performs the contraction or expansion action, it can rotate or move around the common axis, thereby ensuring the synchronization and consistency of the movement, and the doctor can accurately control the retractor 200 and the polymer member 100 during the operation to perform the surgical thrombectomy.

[0076] Specifically, the coaxial arrangement enhances the stability and durability of the structure of the retractor 200, and the mutual interaction and support relationship between them is more stable, which helps to resist external impact and vibration, protects the internal components of the retractor 200 from damage, and thereby prolongs its service life.

[0077] In a specific embodiment, the first wire base 220 is in abutment with the distal end of the cutting tube 400 of the cutting device and is fixedly connected, and the circumferential rotation of the proximal end of the cutting tube 400 can be controlled to control the circumferential rotation of the first wire base 220 and the retractor 200.

[0078] In a specific embodiment, referring to Figure 2 , the first wire base 220 has a ring 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 tube 400 of the cutting device, 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 to fix one end of the wire 210 and is fixedly connected with the distal end of the cutting tube 400, and the axial direction is isosceles trapezoidal, which is convenient for passing through the thrombus and the like.

[0079] Among them, the smaller end of the axial cross section area of the first wire base 220 matches the distal end of the cutting tube 400, and can be fixed by mechanical die casting or welding, while 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 ring.

[0080] In a specific embodiment, the second wire base 230 has a ring structure, and the axial cross section of the second wire base 230 is trapezoidal. 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 a ring structure and is arranged at the other end of the wire 210, and the second wire base 230 has an isosceles trapezoidal cross section, which is convenient for passing through the thrombus and will not touch the thrombus.

[0081] The second wire base 230 has one end with a larger axial cross-sectional area for fixing the wire 210 and the other end with a smaller cross-sectional area for passing through the thrombus. The second wire base 230 can be provided with a developing member at the end with the smaller cross-sectional area.

[0082] In an embodiment, the cutting device further comprises a clamping groove member 700. The outer side wall of the clamping groove member 700 is provided with a circumferential sliding groove 710. 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 high polymer member 100 away from the first wire base 220. 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 of the clamping groove member 700, and can rotate in the circumferential direction relative to the sliding groove 710.

[0083] Specifically, the cutting tube 400 is rotated and the core wire 300 is fixed. At this time, the high polymer member 100 is in a fixed state. The rotation of the cutting tube 400 makes the converging device 200 rotate circumferentially.

[0084] In this embodiment, the axial cross-section of the clamping groove member 700 is trapezoidal, which is convenient for passing through the thrombus. The larger end of the cross-sectional area of the clamping groove member 700 is fixedly connected with the distal end of the high polymer member 100. The smaller end of the cross-sectional area of the clamping groove member 700 is provided with the developing head 500. The trapezoidal cross-section of the clamping groove member 700 presents a gradually changing width or thickness in the axial direction. The other end of the clamping groove member 700, i.e. the smaller end of the cross-sectional area, integrates the developing head 500. The doctor can clearly observe the position of the instrument and the thrombus during the operation through the medical imaging equipment, which greatly improves the accuracy and safety of the operation. The developing head 500 is arranged at the smaller end of the cross-sectional area of the clamping groove member 700, which is convenient for flexible shuttle in the blood vessel and can accurately position when needed, ensuring the accuracy of the operation.

[0085] In an embodiment, the smaller end of the cross-sectional area of the clamping groove member 700 is provided with a developing mounting groove 720. One end of the developing head 500 is provided with a developing mounting member 510. The developing mounting member 510 is matched with the developing mounting groove 720. The developing head 500 is detachably connected with the clamping groove member 700 through the developing mounting member 510. The developing mounting groove 720 provides an accurate and stable platform for the installation and fixation of the developing head 500, so that the whole structure is compact while also having high flexibility and maintainability.

[0086] Wherein, through the detachable connection mode of the developing mounting member 510 and the developing mounting groove 720, the developing head end 500 can be easily combined or separated with the card groove member 700, and can be selected to be used or not used according to the needs.

[0087] Further, the developing mounting member 510 is a 3 / 4 spherical structure, and the developing mounting groove 720 is a matching structure, and the installation and disassembly of the developing head end 500 and the card groove member 700 can be completed by adopting the buckle mode.

[0088] In a specific embodiment, a plurality of key grooves are arranged on the outer side wall of the cutting tube 400, and the interval distance of the plurality of key grooves near the collector 200 is smaller than the interval distance of the plurality of interval key grooves near the controller 600. In this way, the number of key grooves arranged on the cutting tube 400 is larger and more dense, and the interval distance between adjacent two key grooves is smaller, so that the flexibility of the distal end of the cutting tube 400 is stronger, and the collector 200 is facilitated to rotate.

[0089] In a specific embodiment, the head end of the developing is a spiral spring structure.

[0090] According to the above embodiment, the high polymer member 100 made of high polymer injection molding has uniform mounting grooves 110, the collector 200 has a plurality of silk lines 210 and silk line 210 seats at the head and tail, the silk line 210 of the collector 200 is matched with the groove 110 on the high polymer member 100 and is sleeved outside the high polymer member 100, and the number of silk lines 210 is equal to or multiple of the number of mounting grooves 110. The developing head end 500 is arranged at the distal end of the instrument, is made of metal wire with developing performance, and is cut and processed from metal pipe material. The delivery hypotube made of metal pipe material is sleeved outside the delivery core wire 300 and can freely slide and rotate, and the distal end thereof is hard connected with the first silk line seat 220. The developing head end 500 at the distal end of the instrument is matched with the card groove member 700, and the outer side wall of the card groove member 700 is provided with an annular sliding groove 710. The distal end silk line 210 seat of the collector 200 is matched and inlaid with 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.

[0091] Further, the high polymer member 100 and the developing head end 500 improve the overall rigidity of the instrument when passing through the narrow blocked blood vessel during instrument delivery, so that the delivery force can better penetrate the entire instrument. The spiral structure of the high polymer member 100 can make the instrument obtain stronger rotation through performance when necessary by operating the hypotube hard connected thereto. When the head end of the high polymer member 100 passes through the blocked blood vessel, several grooves on the main body can quickly form a flow-through channel to achieve rapid reperfusion of blood flow during the operation. This not only achieves a certain degree of immediate reperfusion, but also uses flowing blood to achieve a certain thrombolytic effect, thereby improving the prognosis of the patient. The developing head end 500 not only has a developing effect, but can also be shaped into a specific shape when necessary to improve its through performance on the thrombus. The traditional mechanical thrombectomy stent only pushes and pulls the thrombus in the front and back directions of the blood flow, and the thrombus generally distributes along the blood flow direction to the distal end of the blood vessel. Sometimes repeated thrombectomy is required several times to completely separate 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 clamp the delivery core wire 300, and the front knob can clamp the hypotube and be designed with a rotation mechanism. The collector 200 can be driven to continuously rotate after clamping the hypotube, and the center push rod and the front and rear knobs are provided with a linkage mechanism. When the front knob enters the clamping state and the rear knob clamps the delivery core wire 300, the center push rod can be used to push the hypotube forward to make the collector 200 originally attached to the groove of the high polymer member 100 open, allowing the operator to adjust the expansion 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 appropriately contracted during retraction to reduce the risk of blood vessel injury.

[0092] Further, because the head end of the hypotube is hard connected to the tail end of the collector 200, the wire 210 seat at the head end of the collector 200 can rotate along the axis of the instrument in the sliding clamping groove. By continuously rotating the front knob, the hypotube can be rotated alone, so that the expanded collector 200 continuously rotates along the blood vessel lumen and peels off the thrombus adhered to the inner wall of the blood vessel, especially the partially organized or hard fibrous and viscous thrombus, from the blood vessel wall, thereby reducing the adhesion of the thrombus to the blood vessel wall. Then, retraction and thrombectomy can greatly improve the reperfusion probability, so that the patient's brain can obtain high blood perfusion in the first time, thereby improving 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 system, characterized in that, include: Polymer components, bundlers, core wires, cutting tubes, and controllers; The polymer component is columnar; The converging device is a multi-filament wound mesh structure, which covers the outside of the polymer component, and one end is rotatably connected to the axial end of the polymer component. The cutting tube is a hollow tubular structure, with one axial end fixed to the other axial end of the converging device, and the other end extending freely. The core wire is installed inside the cutting tube, with one axial end fixed to one axial end of the polymer component and the other end extending freely. The controller is located at the free ends of the cutting tube and the core wire. The distal end of the cutting tube is spaced at a preset distance from the proximal end of the polymer component. The controller keeps the core wire fixed, pushes the cutting tube axially, and controls the condenser to be in a filled or empty state.

2. The thrombus cutting system according to claim 1, characterized in that, When the distal end of the cutting tube is spaced at a predetermined distance from the proximal end of the polymer component, the convergent device is in an unloaded state; when the distal end of the cutting tube abuts against the proximal end of the polymer component, the convergent device is in a filled state. The diameter of the cutting tube is smaller than the circumferential diameter of the polymer component.

3. The thrombus cutting system according to claim 2, characterized in that, The polymer component has grooves on its sidewalls; The groove is spirally arranged along the axial direction of the polymer component; The condenser matches the groove, and rotating the cutting tube causes the condenser to retract into the interior of the groove.

4. The thrombus cutting system according to any one of claims 1-3, characterized in that, The overall shape of the convergent is spiral; The direction of rotation of the condenser is the same as the direction of rotation of the mounting groove.

5. The thrombus cutting system according to any one of claims 1-3, characterized in that, The controller includes: a control housing, a core wire fixing component, and a cutting tube push button; The control housing is a hollow housing structure; The core wire fixing member is disposed on the control housing and is engaged with the free end of the core wire; The cutting tube push button is located on the control housing and is connected to the proximal end of the cutting tube, enabling it to axially push the cutting tube.

6. The thrombus cutting system according to claim 5, characterized in that, The controller further includes: a tube cutting rotating component; The cutting tube rotating component is mounted on the control housing and is engaged with the free end of the cutting tube. The cutting tube is rotatably connected to the control housing and can drive the cutting tube to rotate circumferentially.

7. The thrombus cutting system according to claim 3, characterized in that, The condenser includes: a filament, a first filament base, and a second filament base; Both the first thread base and the second thread base are annular structures; The thread is spiral-shaped, with its two ends fixed to the first thread base and the second thread base respectively, and there are two or more threads, with the two or more threads spiraling in the same direction; The first wire base is a ring structure, and the cross-section of the first wire base along the axial direction is trapezoidal. The smaller end of the axial cross-sectional area of ​​the first wire base is fixedly connected to the far end of the cutting tube of the cutting device, and the larger end of the axial cross-sectional area of ​​the first wire base is connected to the near end of the wire. The second wire base is a ring-shaped structure, and the cross-section of the second wire base along the axial direction is trapezoidal. The larger end of the axial cross-sectional area of ​​the second wire base is connected to the far end of the wire. The outer wall of the slot is provided with a circumferential groove. The groove is an annular groove that matches the second wire base. The second wire base is embedded in the groove of the slot and can rotate around the circumference of the slot.

8. The thrombus cutting system according to claim 7, characterized in that, The threads on the first thread base are arranged at equal intervals.

9. The thrombus cutting system according to claim 4, characterized in that, The straightened length of the filament is greater than the axial length of the polymer component.

10. The thrombus cutting system according to claim 7, characterized in that, The first filament base, the polymer component, and the second filament base are coaxially arranged.

Images