Vascular wall cleaning device

Abstract

The utility model provides a blood vessel wall cleaning device, and belongs to the field of interventional medicine. The device comprises a catheter, a plurality of supporting pieces arranged in an inner cavity of the catheter at intervals and a guide wire arranged in the catheter. A through hole is preset in the supporting piece, reducing openings are formed in the two ends of the through hole, and the diameters of the reducing openings are gradually reduced towards the center. The guide wire comprises a core wire and a head end connected to the front end of the core wire, the guide wire penetrates through the through hole to be arranged in the catheter, the head end is suspended at the front end of the catheter, and the other end, away from the head end, of the core wire is suspended at the rear end of the catheter. According to the thrombus removing device, the resistance of the guide wire in the catheter can be reduced, so that the probability of bending deformation of the guide wire is effectively reduced, the guide wire can smoothly enter a designated position of a blood vessel to clean the removed thrombus, and the removing effect is improved.

Description

Technical Field

[0001] The utility model belongs to the field of interventional medicine, and more specifically, relates to a blood vessel wall cleaning device. Background Art

[0002] Interventional medicine is a medical field that uses minimally invasive techniques for diagnosis and treatment. It combines imaging, radiology, and minimally invasive surgical techniques to achieve precise treatment. This field involves the use of catheters, endoscopes, lasers, and other advanced equipment to treat various diseases, especially in the cardiovascular system, oncology, and neurological systems. Vascular surgery, as an important part of interventional medicine, focuses on treating diseases involving blood vessels, such as atherosclerosis, thrombosis, and vascular stenosis. Through technologies such as intravascular ultrasound, balloon angioplasty, and stent implantation, vascular surgeons can effectively clean the inner walls of blood vessels, restore blood flow, and prevent and treat cardiovascular diseases. The development of interventional medicine has not only improved the precision of treatment, but also reduced surgical trauma and recovery time.

[0003] In existing devices for removing thrombi from blood vessel walls, a guidewire is typically inserted directly into the through-hole of a single rotary cutter, where the guidewire is used to clear the thrombus, thereby removing the thrombus from the body along the axis of the catheter. During this process, the guidewire is prone to colliding with the inner wall of the catheter as it enters the catheter from its outer end, increasing the resistance of the guidewire within the catheter. This resistance can easily cause the guidewire to bend and deform, preventing it from smoothly entering the designated location in the blood vessel to clear the removed thrombus, resulting in poor removal effectiveness. Utility Model Content

[0004] The main purpose of this application is to provide a blood vessel wall cleaning device that can reduce the resistance of the guide wire in the catheter, thereby effectively reducing the probability of the guide wire bending and deformation, so that the guide wire can smoothly enter the designated position of the blood vessel, clean the removed thrombus, and improve the cleaning effect.

[0005] In order to achieve the above-mentioned purpose, the present application proposes a blood vessel wall cleaning device, comprising: a catheter, a plurality of support members arranged in a gap in the inner cavity of the catheter, and a guide wire arranged in the catheter;

[0006] The support member is provided with a through hole, and both ends of the through hole are provided with a diameter-changing opening, and the diameter of the diameter-changing opening gradually decreases toward the center;

[0007] The guide wire includes a core wire and a head end connected to the front end of the core wire. The guide wire is arranged in the catheter through a through hole, the head end is suspended at the front end of the catheter, and the other end of the core wire away from the head end is suspended at the rear end of the catheter.

[0008] Furthermore, the support member includes: a connecting ring, an outer ring rotatably arranged in the connecting ring, and an inner ring arranged in the outer ring and connected to the outer ring through a supporting edge. The connecting ring is sleeved in the catheter and connected to the inner wall of the catheter.

[0009] Furthermore, there are a plurality of supporting edges, which diverge toward the outer ring with the inner ring as the center.

[0010] Furthermore, foreign matter passages for the cleaning objects are formed between adjacent supporting edges.

[0011] Furthermore, the side of the supporting edge close to the front end of the catheter is in the shape of a blade, which can cut the cleaned material.

[0012] Furthermore, the blade-shaped structure is provided with a blade edge, and the blade edge is arranged to be tilted clockwise or counterclockwise.

[0013] Furthermore, balls are provided between the outer ring and the connecting ring, and the balls enable the connecting ring and the outer ring to rotate relative to each other.

[0014] Furthermore, the front end of the core wire is provided with a rounded corner.

[0015] The blood vessel wall cleaning device proposed in this utility model has the following beneficial effects:

[0016] (1) The utility model can reduce the resistance of the guide wire in the catheter, thereby effectively reducing the probability of the guide wire bending and deformation, so that the guide wire can smoothly enter the designated position of the blood vessel, clean the removed thrombus, and improve the cleaning effect.

[0017] (2) The utility model can cut the cleaning materials, effectively reducing the accumulation of cleaning materials on the support member.

[0018] (3) The present invention has a rounded corner design on the guide wire tip, which has good elasticity and will not cause damage to the blood vessel wall during the cleaning process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the blood vessel wall cleaning device of the present invention;

[0020] Figure 2 This is a schematic structural diagram of the support member of the utility model;

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the support member of the present invention.

[0022] In the figure, 1, catheter, 2, support member, 21, connecting ring, 22, outer ring, 23, supporting rib, 24, inner ring, 25, ball bearing, 26, reducing port, 3, guide wire. DETAILED DESCRIPTION

[0023] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0024] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0025] Example

[0026] In the prior art, devices for removing thrombi from blood vessel walls typically employ a common design scheme, wherein a guidewire is directly inserted into the through hole of a single rotary cutter in the device, and the thrombus is cleared by the guidewire. The purpose of this process is to effectively remove the thrombus from the body along the axis of the catheter through the operation of the guidewire. However, in actual use, the guidewire is prone to collision with the inner wall of the catheter, thereby increasing the resistance of the guidewire within the catheter. This resistance not only causes the guidewire to bend and deform, but also affects the guidewire's smooth entry into the designated position of the blood vessel, thereby affecting the clearance effect of the removed thrombus, resulting in poor thrombus removal effect.

[0027] To overcome this problem, this embodiment proposes an improved blood vessel wall cleaning device, which aims to reduce the collision between the guide wire and the inner wall of the catheter and improve the effect of thrombus removal. Figure 1-3 , this improved device includes the following main components: a catheter 1, a support member 2 and a guide wire 3. Specifically, the support member 2 is fixedly installed in the catheter 1 along the axial direction of the catheter 1, and includes at least three support members, wherein the three support members are respectively located in the middle and both ends of the catheter 1. The main function of the support member is to provide support for the catheter 1 and ensure the stability and linearity of the catheter during use. Each support member 2 is provided with a through hole, and a reducing port 26 is provided at both ends of the through hole. The diameter of these reducing ports 26 gradually decreases along the center direction thereof, forming a conical pit. This conical design is intended to better guide the passage of the guide wire 3. Among them, the guide wire 3 includes a core wire and a head end connected to the front end of the core wire. The guide wire 3 is arranged in the catheter through the through hole, the head end of the guide wire 3 is suspended at the front end of the catheter 1, and the other end of the core wire away from the head end is suspended at the rear end of the catheter 1. In this embodiment, reference Figure 1, the core wire is defined as the straight tubular structure in the figure, and the front end of the core wire is the curved part connected to the straight tubular structure. When the guide wire 3 contacts the inner surface of this pit, it can be directly guided into the inner ring 24 through the smooth arc surface. This design not only simplifies the guiding process of the guide wire 3, but also reduces the resistance that the guide wire 3 may encounter when passing through the through hole, ensuring that the guide wire 3 can pass through the structure of the support member 2 more smoothly. The guide wire 3 can pass smoothly through these through holes. In this design, at least three support members 2 can provide support for the guide wire 3, thereby effectively avoiding the guide wire 3 from directly colliding with the inner wall of the catheter 1 when it travels in the catheter 1. This design innovation can not only significantly reduce the resistance of the guide wire in the catheter, but also prevent the guide wire 3 from undergoing extreme bending deformation, ensuring that the guide wire can smoothly enter the designated position of the blood vessel. The provision of the support member 2 also enables the guide wire 3 to maintain stability throughout the clearing process, avoiding the instability caused by the collision of the guide wire 3 with the inner wall of the catheter. Through this improvement measure, the guide wire 3 can clear the thrombus more effectively, and ultimately improve the overall effect of thrombus removal.

[0028] The improved device design also offers other advantages, such as reducing the additional resistance generated by the collision of the guidewire 3 with the inner wall of the catheter 1 during operation, thereby reducing the complexity and difficulty of the operation and improving operational safety. Furthermore, reducing resistance and maintaining the stability of the guidewire also means that the service life of the device is extended, thereby reducing the frequency of maintenance and replacement. These improvements work together to significantly enhance the overall performance of the vascular wall cleaning device, enabling better results in actual medical operations.

[0029] In summary, this embodiment effectively addresses the issue of guidewire collision with the inner wall of the catheter in conventional devices by disposing multiple supports 2 within the catheter 1 and pre-setting through-holes therein. This innovative design not only improves the operational stability of the guidewire and the effectiveness of thrombus removal, but also enhances the performance and reliability of the overall device.

[0030] In certain embodiments, reference Figure 2The structural design of the support member 2 includes several key components, specifically a connecting ring 21, an outer ring 22 rotatably mounted within the connecting ring 21, supporting ribs 23, and an inner ring 24 mounted within the outer ring 21. The interplay of these components within the support member 2 plays a crucial role, improving the functionality and effectiveness of the vascular wall thrombus removal device. First, the connecting ring 21 is sheathed onto the inner wall of the catheter 1, forming the anchoring base for the support member 2. The design of the connecting ring 21 ensures the entire support member 2 is stably secured within the catheter. The inner ring region of the connecting ring 21 serves as the rotational base for the outer ring 22, which can freely rotate within the annular region of the connecting ring 21. Multiple supporting ribs 23 are evenly distributed on the outer ring 22, designed to gradually diverge from the center of the outer ring 22. The diverging design of the supporting ribs 23 helps to stably secure the inner ring 24, which is securely mounted at the central location of the supporting ribs 23. The presence of through-holes is a key feature of the support member 2 design. These through holes extend from the connecting ring 21 to the outer ring 22 and further extend to the inner ring 24, providing necessary channels for the passage of the guide wire 3. Specifically, the guide wire 3 can pass through these holes, thereby operating in the catheter 1.

[0031] In this embodiment, the guide wire 3 is driven by an external force to rotate. When the guide wire 3 passes through the outer ring 22, the outer ring 22 will rotate with the guide wire 3 because the outer ring 22 and the connecting ring 21 can rotate relative to each other. In this way, when the guide wire 3 rotates inside the blood vessel, a rotational centrifugal force is generated. This rotational centrifugal force exerts a driving force on the guide wire 3 toward or away from the cleaning material, thereby helping the guide wire 3 to smoothly reach the predetermined thrombus position or quickly remove the thrombus from the designated position in actual operation. It should be emphasized that the head end of the guide wire 3 is defined as the end facing the thrombus. During the cleaning process, the head end of the guide wire 3 forms a cleaning effect inside the blood vessel by rotating, effectively removing the thrombus or other adhesions attached to the blood vessel wall. The rotation of the guide wire 3 will gradually remove the thrombus or adhesions, thereby improving the cleaning effect of the blood vessel wall cleaning device.

[0032] In general, the design of the support member 2 includes a connecting ring 21, an outer ring 22, a supporting ridge 23, and an inner ring 24. Through the synergistic effect of these components, the guidewire 3 can obtain better support and guidance when clearing blood clots. The relative rotation design of the outer ring 22 and the connecting ring 21, combined with the application of rotating centrifugal force, allows the guidewire 3 to pass smoothly through the support member 2 during the cleaning process, reducing the risk of bending and deformation of the guidewire 3, thereby effectively improving the effect of blood clot removal. During the rotation process, the guidewire 3 clears the attachments on the blood vessel wall, making the entire blood vessel cleaning process more efficient and accurate.

[0033] In some specific embodiments, adjacent supporting ridges 23 are formed to form foreign body channels for the passage of cleaning materials. The design purpose of these foreign body channels is to allow the cleaning materials to pass smoothly, while effectively reducing the risk of the cleaning materials being blocked in the support member 2. In the figure, these foreign body channels are identified as 12. However, these 12 foreign body channels are only for schematic illustration, and the number of foreign body channels is not limited in actual application and can be adjusted according to actual needs. The arrangement of the foreign body channels in the design ensures that during the cleaning process in the blood vessel, the cleaning materials can pass through the support member 2 smoothly, and will not cause a decrease in the cleaning effect or damage to the equipment due to blockage.

[0034] In addition, in another embodiment, the side of the support rib 23 near the front end of the catheter is a blade-shaped structure. This design has a cutting function and can effectively reduce the size of the cleaning material, thereby reducing the probability of blockage. This blade-shaped support rib 23 is provided with a sharp blade, and the blade can be tilted in a clockwise or counterclockwise direction. Such a design enables the support rib 23 to cut during the rotation of the guide wire 3, further reducing the volume of the cleaning material. Specifically, when the guide wire 3 rotates, due to contact with the inner ring 24, the inner ring 24 will also rotate. This rotation causes the support rib 23 to rotate as well. The tilted setting of the blade plus the rotation function make cutting the cleaning material more efficient. The blade design effectively improves the cutting efficiency and further reduces the possibility of clogging of the cleaning material.

[0035] In some other embodiments, reference Figure 3 To reduce wear caused by direct friction between the outer ring 22 and the connecting ring 21, balls 25 are designed between the two rings. The placement of these balls 25 significantly reduces friction between the two rings. When the outer ring 22 and the connecting ring 21 rotate relative to each other, the balls 25 roll between them, reducing direct friction and wear. In this way, the balls 25 extend the life of the device, reduce maintenance frequency, and improve overall operational smoothness and stability.

[0036] To further explain, in the design of the present invention, the tip of the core wire is specially designed with rounded corners. This rounded corner design is intended to improve the flexibility and adaptability of the guide wire 3 during intravascular operation. When the guide wire 3 is rotated by an external force, its tip rotates within the blood vessel, effectively clearing thrombi or other adhesions attached to the vessel wall. Because the tip of the core wire is rounded, it has good elasticity and can avoid damaging the vessel wall during the cleaning process. The rounded corner design of the guide wire 3 reduces the direct impact of sharp edges on the inner wall of the vessel during rotational cleaning, thereby protecting the vessel wall from damage. This rounded corner design provides several important advantages: First, the gentle shape of the rounded corners makes it easier for the guide wire 3 to adapt to the complex environment within the blood vessel, reducing friction with the vessel wall and potential damage. Second, the rounded corner design helps the guide wire 3 more effectively reach and remove thrombi or other impurities attached to the vessel wall during the cleaning process. Because the tip of the guide wire 3 can rotate smoothly and form less frictional contact with the inner wall of the vessel, the overall cleaning effect is more significant.

[0037] It should be noted that the catheter front end referred to in the above embodiments refers to the end closest to the front end of the core wire, and the guidewire tip end refers to the tip of the core wire. During a thrombus removal procedure, medical personnel first insert a guidewire through the patient's blood vessels. The guidewire's material and design enable it to pass smoothly through the blood vessels without damaging the vessel walls. Next, the medical personnel carefully advance the guidewire along the path of the blood vessel until it reaches the material to be removed. Subsequently, the medical personnel advance a catheter, slightly thicker than the guidewire, along the guidewire's path. The catheter's function is to provide a passage. During this process, the guidewire passes through multiple support members within the catheter's lumen, providing support for the guidewire and preventing collisions between the catheter and the guidewire. The catheter's lumen typically has a certain degree of flexibility to accommodate the tortuosity of the blood vessel. Finally, under the action of external force, the guidewire gradually sweeps the removed material into the foreign body passage, where it is then gradually removed from the blood vessel. The cleared matter referred to in the above embodiment may be thrombus, air bubble, atherosclerotic plaque (composed of fat, cholesterol, calcium salts, etc., deposited on the blood vessel wall, which may cause vascular stenosis or blockage), etc.

[0038] In the present invention, the above improvements make the process of clearing thrombus more efficient and safer, and provide a more reliable solution for the practical application of medical devices.

[0039] In the description of the present invention, it should be understood that the terms "middle", "two ends", "head end", "front end", "inside", "outside", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0040] In the present invention, unless otherwise expressly specified or limited, a first feature "on" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. "Multiple" means at least two, such as two or three, unless otherwise expressly specified or limited.

[0041] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two components or interaction between two components, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0042] The above is only for explaining the implementation mode of the present invention and is not intended to limit the present invention. For those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention without creative work should be included in the scope of protection of the present invention.

Claims

1. A blood vessel wall cleaning device, characterized in that: include: A catheter, a plurality of support members spaced apart and arranged in the catheter lumen, and a guide wire disposed in the catheter; The support member is provided with a through hole, and both ends of the through hole are provided with a diameter-changing opening, and the diameter of the diameter-changing opening gradually decreases toward the center; The guide wire includes a core wire and a head end connected to the front end of the core wire. The guide wire is arranged in the catheter through the through hole, the head end is suspended at the front end of the catheter, and the other end of the core wire away from the head end is suspended at the rear end of the catheter. The support member includes: a connecting ring, an outer ring rotatably arranged in the connecting ring, and an inner ring arranged in the outer ring and connected to the outer ring through a supporting edge. The connecting ring is sleeved in the catheter and connected to the inner wall of the catheter. Adjacent supporting edges form foreign matter passages for passing the cleaning objects; The side of the supporting edge close to the front end of the catheter is in the shape of a blade and can cut the cleaning material.

2. The blood vessel wall cleaning device according to claim 1, characterized in that: There are a plurality of supporting edges, which diverge toward the outer ring with the inner ring as the center.

3. The blood vessel wall cleaning device according to claim 1, characterized in that: The blade-shaped structure is provided with a cutting edge, and the cutting edge is arranged to be inclined in a clockwise or counterclockwise direction.

4. The blood vessel wall cleaning device according to claim 1, characterized in that: Ball bearings are provided between the outer ring and the connecting ring, and the balls enable the connecting ring and the outer ring to rotate relative to each other.

5. The blood vessel wall cleaning device according to claim 1, characterized in that: The head end of the front end of the core wire is provided with a rounded corner.

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