Neural intervention guide wire and catheter assembly

Abstract

The invention provides a nerve intervention guide wire and catheter assembly, and belongs to the technical field of interventional operation equipment. Comprising a guide wire, a catheter body and a guide supporting ball, the guide wire is used for guiding the catheter body to move towards a target position, and the outer side of the guide supporting ball is clamped at the far end of the catheter body and moves towards the far end along with the catheter body; a stop block used for stopping the guide supporting ball is fixedly arranged at the position, close to the far end, of the guide wire, and when the catheter body moves towards the far end along the guide wire, the guide supporting ball is used for filling a radial gap between the far end of the catheter body and the guide wire, so that the catheter body is guided to smoothly pass through the bifurcation position of the blood vessel. After the catheter body reaches a target position, in the process of withdrawing the guide wire towards the near end, the stop block pushes the guide supporting ball towards the near end to be separated from the far end of the catheter body and withdrawn out of the body through the catheter body; the suction catheter is mainly used for solving the technical problem that the windowsill effect exists in the process that an existing suction catheter is pushed towards the far end in the nerve interventional operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of interventional surgical devices, and particularly relates to a neurointerventional guide wire catheter assembly. Background Art

[0002] Interventional surgery is a minimally invasive technique that, under the guidance of medical imaging devices (such as X-ray, ultrasound, CT, MRI, etc.), uses instruments such as puncture needles, catheters, and guide wires to introduce the instruments into the lesion site through natural body cavities or small incisions for diagnosis and treatment. Compared with traditional open surgery, interventional surgery usually only requires a small incision on the skin or entry into the body through natural body orifices, resulting in less tissue damage, faster postoperative recovery, and shorter hospital stays, thus being widely promoted.

[0003] Taking thrombus aspiration as an example, the specific operation process is as follows: First, the femoral artery or radial artery is usually selected as the puncture site. After successful puncture using the technique, a vascular sheath is inserted to provide a passage for subsequent instruments to enter the blood vessel. The guide wire is slowly inserted into the blood vessel through the vascular sheath. Under the guidance of X-ray fluoroscopy, the guide wire is carefully pushed along the blood vessel path to the target intracranial blood vessel. The role of the guide wire is to provide guidance and support for the subsequent aspiration catheter. When the guide wire is in place, the aspiration catheter is sleeved outside the guide wire at the proximal end and pushed distally along the direction of the guide wire until the distal end of the aspiration catheter reaches the target position guided by the guide wire. Then, thrombus aspiration is completed by operating the aspiration device at the proximal end.

[0004] During the operation, as Figure 1 shown, since the diameter of the aspiration catheter is larger than that of the guide wire, there is a gap between the distal end of the aspiration catheter and the guide wire. This leads to the possibility that when the distal end of the aspiration catheter moves distally in the main blood vessel and encounters the position of a branch blood vessel, the distal end of the aspiration catheter may get stuck at the bifurcation of the branch blood vessel and the main blood vessel and be difficult to pass through, commonly known as the "windowsill effect"; especially during intracranial vascular interventional surgery, the intracranial blood vessels have tortuous paths, numerous branches, and variable angles. In the area where the intracranial blood vessel diameter transitions, especially from a relatively large main blood vessel to a smaller branch blood vessel, the aspiration catheter is more likely to be hindered during passage due to diameter mismatch and the gap with the guide wire, resulting in the occurrence of the "windowsill effect", which may in turn affect the smooth progress of the surgery.

[0005] Therefore, an improved technical solution is needed to address the deficiencies of the above-mentioned existing technologies. Summary of the Invention

[0006] The purpose of the present invention is to provide a neurointerventional guide wire catheter assembly to solve the technical problem of the existing aspiration catheter having a "windowsill effect" during the distal advancement in neurointerventional surgery.

[0007] To achieve the above object, the neurointerventional guide wire catheter assembly of the present invention provides the following technical solutions:

[0008] A neurointerventional guide wire catheter assembly, comprising:

[0009] A guide wire for guiding the catheter body to move towards the target position;

[0010] A catheter body for moving along the guide wire towards the target position;

[0011] A guiding support ball, the outer side of which is used to be radially clamped at the distal end of the catheter body and move along with the catheter body towards the distal end of the guide wire;

[0012] A stop block for stopping the guiding support ball is fixedly arranged at a position near the distal end of the guide wire. When the catheter body moves along the guide wire towards the distal end, the guiding support ball is used to fill the radial gap between the distal end of the catheter body and the guide wire, so as to smoothly pass the catheter body at the blood vessel bifurcation position. After the catheter body reaches the target position, during the process of withdrawing the guide wire proximally, the stop block pushes the guiding support ball proximally to disengage from the distal end of the catheter body and withdraw it out of the body through the catheter body.

[0013] As a further optimized technical solution, the guiding support ball is of a hollow structure, and there is a channel for blood flow at the sliding position between the guiding support ball and the guide wire.

[0014] As a further optimized technical solution, the guiding support ball is in an ellipsoidal shape.

[0015] As a further optimized technical solution, the extending direction of the major axis of the guiding support ball is arranged along the axial extending direction of the guide wire.

[0016] As a further optimized technical solution, the distal end of the catheter body is clamped near the minor axis position of the guiding support ball.

[0017] As a further optimized technical solution, the guiding support ball is spherical, the axial extending direction of the guiding support ball is arranged along the axial extending direction of the guide wire, and the distal end of the catheter body is clamped near the radial position of the guiding support ball.

[0018] As a further optimized technical solution, the proximal end of the stop block is conical, and the radial dimension gradually decreases along the extending direction from the distal end to the proximal end.

[0019] As a further optimized technical solution, sliding rings are arranged at both ends of the guiding support ball, and each sliding ring has a drainage hole for sliding along the guide wire. The drainage hole of the distal sliding ring is a conical hole with an inclination not greater than the taper of the stop block, and the radial dimension gradually decreases along the extending direction from the distal end to the proximal end.

[0020] As a further optimized technical solution, the inclination of the tapered hole of the sliding ring at the distal end is adapted to the taper of the stop block.

[0021] As a further optimized technical solution, perforations communicating with the internal space are circumferentially arranged at the distal end of the guiding support ball.

[0022] Beneficial effects:

[0023] By providing the guiding support ball, the present invention effectively fills the gap between the distal end of the catheter body and the guide wire, enabling a smooth transition connection between the distal end of the catheter body and the guide wire through the outer surface of the guiding support ball. When the distal end of the catheter body passes through the position of the branch blood vessels in the skull again, a smooth transition can be achieved under the action of the guiding support ball, allowing the catheter body to pass through the branch blood vessel position smoothly, thereby avoiding the "windowsill effect" at the bifurcation position of the intracranial blood vessels, greatly improving the success rate of advancing the catheter in the intracranial blood vessels, and making the interventional operation more smooth; in addition, the design of the stop block on the guide wire facilitates the withdrawal of the guiding support ball in the later stage. After the catheter body is in place, by pulling the guide wire proximally, the stop block pushes the guiding support ball proximally to disengage from the distal end of the catheter body and withdraw it from the body through the catheter body, thus facilitating the subsequent aspiration action of the catheter body.

[0024] Furthermore, the design of the hollow structure of the guiding support ball and the related blood flow channels ensures the normal blood flow in the intracranial blood vessels during the operation. At the same time, the hollow-structured guiding support ball is easier to withdraw subsequently, and the blood flow-filled guiding support ball can ensure the original function of the catheter body communicating with the blood flow while increasing the support of the guiding support ball, thereby facilitating the operator to judge the position of the catheter body according to the blood flow situation and reducing the adverse impact of the operation on the patient's blood circulation system.

[0025] Furthermore, the different shape designs of the guiding support ball and its cooperation with the catheter body and the guide wire can adapt to different intracranial blood vessel structures and surgical requirements, improving the versatility and adaptability of the neurointerventional guide wire catheter assembly. Description of the drawings

[0026] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. Among them:

[0027] Figure 1 is a working schematic diagram of the aspiration catheter being transported along the guide wire in the prior art;

[0028] Figure 2 is an overall structural schematic diagram of Embodiment 1 of the neurointerventional guide wire catheter assembly of the present invention;

[0029] Figure 3 Schematic perspective view of Embodiment 1 of the neurointerventional guide wire catheter assembly of the present invention;

[0030] Figure 4 Schematic working state view of Embodiment 1 of the neurointerventional guide wire catheter assembly of the present invention;

[0031] Figure 5 Schematic overall structure view of Embodiment 2 of the neurointerventional guide wire catheter assembly of the present invention;

[0032] Figure 6 Schematic overall structure view of Embodiment 3 of the neurointerventional guide wire catheter assembly of the present invention;

[0033] Figure 7 is Figure 6 Enlarged schematic view of the cooperation state of the sliding ring and the stop block in the middle and distal ends.

[0034] In the figure: 1, guide wire; 2, catheter body; 3, guiding support ball; 301, sliding ring; 302, drainage hole; 303, perforation; 4, stop block; 5, main blood vessel; 6, branch blood vessel. Detailed implementation manners

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0036] In the description of the present invention, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention rather than requiring the present invention to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The terms "connected" and "coupled" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations. In addition, the term "proximal end" uniformly refers to the end close to the operator, and the "distal end" refers to the end far from the operator.

[0037] The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments. It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0038] The shapes and sizes of the components in the drawings do not reflect the actual proportions of the products, and are only intended to illustrate the contents of the present invention.

[0039] The present invention provides a neurointerventional guidewire catheter assembly, which is mainly composed of a guide wire 1, a catheter body 2 and a guide support ball 3. The guide wire 1 is used to guide the catheter body 2 to move to the target position. The catheter body 2 moves forward along the guide wire 1. The guide support ball 3 is clamped on the outer side of the catheter body 2 at the distal end, and is used to fill the radial gap between the distal end of the catheter body 2 and the guide wire 1, so as to assist the catheter body 2 to pass smoothly through the bifurcation of the intracranial blood vessels. The stop block 4 at the position close to the distal end of the guide wire 1 stops the guide support ball 3 when advancing, ensures the position of the catheter body 2, and squeezes the guide support ball 3 toward the proximal end when withdrawing the guide wire 1 to separate it from the catheter body 2. The present invention effectively solves the "window sill effect" in the advancement of the suction catheter during neurointervention surgery, ensures blood circulation, improves the convenience and accuracy of surgical operation, and has a wide range of clinical application value. Please refer to the following examples for specific detailed implementation methods.

[0040] Example 1

[0041] like Figure 2 , Figure 3 As shown, the neurointervention guidewire catheter assembly includes a guide wire 1, a catheter body 2 and a guide support ball 3.

[0042] Guide wire 1 The guide wire 1 is a slender filamentous structure, which is convenient for moving in the blood vessel and is used to guide the catheter body 2 to move toward the target position.

[0043] In this embodiment, the catheter body 2 is a suction catheter, which is used to move along the guide wire 1 to the position (target position) of the thrombus to be treated guided by the guide wire 1.

[0044] The outer side of the guide support ball 3 is used to radially clamp on the distal end of the catheter body 2 and move with the catheter body 2 to the distal end of the guide wire 1. In this way, the guide support ball 3 fills the radial gap between the distal end of the catheter body 2 and the guide wire 1, so that the distal end of the suction catheter and the guide wire 1 are connected by a smooth transition through the outer surface of the guide support ball 3. When the distal end of the suction catheter passes through the branch blood vessel 6 again, a smooth transition can be achieved under the action of the guide support ball 3, and then the "window sill effect" will no longer appear at the bifurcation position of the intracranial blood vessels. In this embodiment, the guide support ball 3 is made of a soft elastic material (such as silicone), which is convenient for deformation during subsequent withdrawal to detach from the distal end of the suction catheter.

[0045] After the aspiration catheter is in place, in order to prevent the guiding support ball 3 from interfering with the aspiration function of the aspiration catheter, a stop block 4 for stopping the guiding support ball 3 is fixedly arranged at a position near the distal end of the guide wire 1. The specific scenarios of stopping the guiding support ball 3 include: stopping the in-place guiding support ball 3 and stopping and limiting the guiding support ball 3 when it is withdrawn. Specifically, when the aspiration catheter moves distally along the guide wire 1, under the action of the stop block 4, the aspiration catheter can accurately stop after reaching the target position. In addition, during the process of withdrawing the guide wire 1 proximally, the stop block 4 squeezes proximally to push the guiding support ball 3 away from the distal end of the catheter body 2 and withdraw it outside the body through the catheter body 2.

[0046] In this embodiment, the guiding support ball 3 has a hollow structure, and there is a channel for blood flow to pass through at the sliding position between the guiding support ball 3 and the guide wire 1. In addition, the hardness of the proximal part of the hollow-structured guiding support ball 3 is greater than that of the distal part. Specifically, taking the clamping position with the aspiration catheter as the boundary, the boundary can also be offset distally by some distance (the specific offset distance does not exceed 10% of the major axis dimension of the guiding support ball 3). The hardness of the part of the guiding support ball 3 from the boundary to the proximal end is greater than that of the part from the boundary to the distal end. In this way, the hollow structure can continue to maintain the function of the existing technology that the aspiration catheter communicates with the blood flow, facilitating the operator to judge the in-place situation of the aspiration catheter according to the blood flow condition. In addition, during the process of the hollow-structured guiding support ball 3 advancing with the aspiration catheter in the early stage, due to the relatively high hardness of the clamping position, it is easier to maintain position stability. When it needs to be withdrawn in the later stage, the stop block 4 squeezes the distal part of the guiding support ball 3, so this part is relatively soft. Therefore, under the squeezing action of the stop block 4, it is easier to deform and sink inward (proximally), causing the distal part to sink into the proximal part, so that the guiding support ball 3 can be more easily retracted into the aspiration catheter and withdrawn outside the body. In addition, although the hollow-structured guiding support ball 3 is relatively easier to deform compared with the solid structure, the blood flow filling the inside during the process of advancing with the aspiration catheter in the early stage will further increase the radial support performance of the guiding support ball 3, thus smoothly realizing its guiding function.

[0047] In this embodiment, the guiding support ball 3 is ellipsoidal in shape, and the extending direction of the major axis of the guiding support ball 3 is arranged along the axial extending direction of the guide wire 1. Since the radial transformation speed of the ellipsoid along the major axis direction is slower, that is, the arc curvature is smaller, a smooth transitional guidance from the guiding support ball 3 to the aspiration catheter can be achieved at the intracranial blood vessel bifurcation position, and the guiding effect is better.

[0048] Further, the distal end of the catheter body 2 is clamped near the short axis position of the guiding support sphere 3. It should be noted that "near the short axis position of the guiding support sphere 3" means that the distal end of the aspiration catheter can be directly clamped at the short axis position of the guiding support sphere 3 or at a position close to the short axis of the guiding support sphere 3. At this time, as long as the specific degree of proximity is within the range of 5% of the long axis length deviating from the short axis position of the guiding support sphere 3, this can not only ensure the smooth transition between the guiding support sphere 3 and the aspiration catheter, but also facilitate the deformation of the guiding support sphere 3 into the lumen of the aspiration catheter for withdrawal from the body in the later stage.

[0049] Further, the proximal end of the stop block 4 is conical, and the radial dimension gradually decreases in the extending direction from the distal end to the proximal end. In this embodiment, the stop block 4 is integrally conical. The purpose of such a design is that, firstly, the proximal end of the stop block 4 can more easily enter the channel for blood flow to pass through at the distal end of the guiding support sphere 3, so as to facilitate the end sealing of the guiding support sphere 3 for the evacuation operation of the guiding support sphere 3; in addition, the conical stop block 4 has an inclined conical surface, and the end sealing of the guiding support sphere 3 can be achieved without strictly controlling the diameter dimension, thereby effectively reducing the processing accuracy and difficulty and improving the production efficiency.

[0050] In this embodiment, sliding rings 301 are arranged at both ends of the guiding support sphere 3, and each sliding ring 301 has a drainage hole 302 for sliding along the guide wire 1. During the process of the aspiration catheter advancing distally, blood enters the guiding support sphere 3 from the distal drainage hole 302 and then is discharged from the proximal drainage hole 302. That is, the distal drainage hole 302 of the guiding support sphere 3, the space inside the guiding support sphere 3 and the proximal drainage hole 302 of the guiding support sphere 3 constitute the channel for blood flow to pass through in the present invention.

[0051] Further, the drainage hole 302 of the distal sliding ring 301 is a conical hole with an inclination not greater than the taper of the stop block 4, and the radial dimension gradually decreases in the extending direction from the distal end to the proximal end. The purpose of such a design is that, firstly, the distal drainage hole 302 can be in a flared shape facing the blood flow entry direction, further ensuring the smoothness of blood flow, and secondly, it can better cooperate with the stop block 4.

[0052] In this embodiment, the inclination of the conical hole of the distal sliding ring 301 is adapted to the taper of the stop block 4. In this way, the stop block 4 and the distal sliding ring 301 can be better adapted, and the contact area is larger when the stop block 4 and the distal sliding ring 301 cooperate, so as to better ensure the sealing performance.

[0053] In actual surgical operations, first, with the aid of professional instruments, the guiding wire 1 is sent into the patient's blood vessel through the vascular sheath. Under the precise guidance of the X-ray fluoroscopy equipment, the guiding wire 1 is gradually pushed to the target blood vessel position. At this time, the stop block 4 at the distal end of the guiding wire is located at the position where the aspiration catheter needs to reach. Subsequently, the guiding support ball 3 is sleeved on the guiding wire 1 from the proximal end, then the aspiration catheter is sleeved on the guiding wire 1, and the guiding support ball 3 is clamped at the distal end of the aspiration catheter. When the aspiration catheter starts to advance distally along the guiding wire 1, specifically as Figure 4 shown, the guiding support ball 3 fills the radial gap between the distal end of the aspiration catheter and the guiding wire 1 and travels distally along the main blood vessel 5 with the aspiration catheter. When encountering a blood vessel bifurcation, such as the bifurcation of the main blood vessel 5 and the branch blood vessel 6 shown in the figure, the guiding support ball 3 can guide the aspiration catheter to pass through smoothly and successfully avoid the "windowsill effect". When the catheter body 2 reaches the target position, the guiding support ball 3 needs to be withdrawn. At this time, the guiding wire 1 needs to be withdrawn proximally. The stop block 4 squeezes the distal end of the guiding support ball 3 under the pulling action of the guiding wire 1. The guiding support ball 3 first drains the blood inside, and then the distal end of the guiding support ball 3 deforms and enters the inside of the aspiration catheter, and is withdrawn from the body smoothly by moving along the aspiration catheter and with the guiding wire 1.

[0054] Embodiment 2

[0055] As Figure 5 shown, the catheter body 2 of this embodiment is basically the same as that of Embodiment 1 in terms of material, but is slightly different from Embodiment 1 in shape. In this embodiment, the guiding support ball 3 is spherical, and the axial extension direction of the guiding support ball 3 is arranged along the axial extension direction of the guiding wire 1. The distal end of the catheter body 2 is clamped near the radial position of the guiding support ball 3.

[0056] Embodiment 3

[0057] As Figure 6 、 Figure 7 shown, the shape of the drainage hole 302 of this embodiment is basically the same as that of Embodiment 1, but is slightly different from Embodiment 1 in the design of the inclination. In this embodiment, sliding rings 301 are provided at both ends of the guiding support ball 3, and each sliding ring 301 has a drainage hole 302 for sliding along the guiding wire 1. The drainage hole 302 of the distal sliding ring 301 is a tapered hole with an inclination less than the taper of the stop block 4. At this time, compared with the tapered hole with an inclination equal to the taper of the stop block 4, the drainage hole 302 does not need to be strictly matched with the inclination of the stop block 4, so the processing precision and difficulty can be effectively reduced, and the production efficiency can be improved; in addition, a smaller inclination will make the proximal diameter of the drainage hole 302 larger, which is more conducive to blood entering the guiding support ball 3.

[0058] Embodiment 4

[0059] The structure of the catheter body 2 in this embodiment is basically the same as that in Embodiment 1, but there are slight differences in the type selection. In this embodiment, the catheter body 2 can be selected from other catheter structures except the aspiration catheter, as long as it is a catheter structure that needs to be guided to the target position by the guide wire 1 and there is a gap between the distal end and the guide wire 1.

[0060] Embodiment 5

[0061] The material of the guiding and supporting ball 3 in this embodiment is basically the same as that in Embodiment 1, but there are slight differences in the structural design. In this embodiment, in order to further enrich the blood flow path, reduce the interference with the hemodynamics in the blood vessel, and provide guarantee for the smooth progress of the operation, perforations 303 communicating with the internal space are circumferentially arranged at the distal end of the guiding and supporting ball 3. The setting of the perforations 303 can reduce the interference of the guiding and supporting ball 3 on blood flow. In addition, after the stopper 4 blocks the distal drainage hole 302 in the later stage, the blood flow stop and the flow of the aspiration catheter can be avoided. In addition, the existence of the perforations 303 makes it easier for the guiding and supporting ball 3 to deform when the stopper 4 is used to squeeze the guiding and supporting ball 3.

[0062] In summary, the neurointerventional guide wire catheter assembly provided by the present invention successfully solves the problem of the "window sill effect" during the advancement of the aspiration catheter in the existing neurointerventional surgery through the innovative design of the core structure and the optimized combination of key components.

[0063] Of course, the above description is only an example illustration of the technical solution of the present invention, and the changes and expansions in actual applications are all within the scope covered by the embodiments of this application.

[0064] It can be understood that the above description is only exemplary, and the embodiments of this application do not limit this.

[0065] The above are only the preferred embodiments of the present invention, and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are within the scope of the claims of the present invention awaiting approval.

Claims

1. A neurointerventional guidewire catheter assembly, characterized in that: include: A guide wire (1), wherein the guide wire (1) is used to guide the catheter body (2) to move toward a target position; A catheter body (2), the catheter body (2) being used to move toward a target position along a guide wire (1); A guide support ball (3), the outer side of which is used to be radially clamped on the distal end of the catheter body (2) and to move along with the catheter body (2) to guide the distal end of the guide wire (1); A stop block (4) for stopping the guide support ball (3) is fixedly provided near the distal end of the guide wire (1). When the catheter body (2) moves toward the distal end along the guide wire (1), the guide support ball (3) is used to fill the radial gap between the distal end of the catheter body (2) and the guide wire (1), so that the guide catheter body (2) can pass smoothly at the bifurcation position of the blood vessel. After the catheter body (2) reaches the target position, during the process of withdrawing the guide wire (1) toward the proximal end, the stop block (4) pushes the guide support ball (3) toward the proximal end to separate from the distal end of the catheter body (2) and withdraw it out of the body through the catheter body (2).

2. The neurointervention guidewire catheter assembly according to claim 1, characterized in that: The guide support ball (3) is a hollow structure, and a channel for blood flow to pass through is provided at the sliding position between the guide support ball (3) and the guide wire (1).

3. The neurointervention guidewire catheter assembly according to claim 2, characterized in that: The guide support ball (3) is in the shape of an ellipsoid.

4. The neurointervention guidewire catheter assembly according to claim 3, characterized in that: The long axis extension direction of the guide support ball (3) is arranged along the axial extension direction of the guide wire (1).

5. The neurointervention guidewire catheter assembly according to claim 4, characterized in that: The distal end of the catheter body (2) is clamped near the short axis position of the guide support ball (3).

6. The neurointervention guidewire catheter assembly according to claim 2, characterized in that: The guide support ball (3) is spherical, and the axial extension direction of the guide support ball (3) is arranged along the axial extension direction of the guide wire (1), and the distal end of the catheter body (2) is clamped near the radial position of the guide support ball (3).

7. The neurointervention guidewire catheter assembly according to any one of claims 2 to 6, characterized in that: The proximal end of the stop block (4) is conical, and the radial dimension in the extending direction from the distal end to the proximal end gradually decreases.

8. The neurointervention guidewire catheter assembly according to claim 7, characterized in that: Sliding rings (301) are provided at both ends of the guide support ball (3), and each sliding ring (301) has a drainage hole (302) that slides along the guide wire (1). The drainage hole (302) of the sliding ring (301) at the distal end is a conical hole with an inclination not greater than the taper of the stop block (4), and the radial dimension gradually decreases in the extending direction from the distal end to the proximal end.

9. The neurointervention guidewire catheter assembly according to claim 8, characterized in that: The inclination of the tapered hole of the sliding ring (301) at the far end is adapted to the taper of the stop block (4).

10. The neurointervention guidewire catheter assembly according to any one of claims 2 to 6, characterized in that: The far end of the guide support ball (3) is circumferentially arranged with a through hole (303) communicating with the internal space.

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