Multidirectional bend-adjusting catheter and multidirectional bend-adjusting catheter device

Abstract

The utility model relates to the technical field of medical instruments, and particularly discloses a multidirectional bending adjusting catheter and a multidirectional bending adjusting catheter device. The catheter comprises a catheter main body and a stay wire, wherein the catheter main body comprises a first fixed section, a first deformation section, a second deformation section and a second fixed section which are sequentially connected from the far end to the near end; the pull wire penetrates through an inner cavity of the catheter body, the first end of the pull wire is fixed to the first fixing section, the second end of the pull wire penetrates out of the near end of the catheter body, and the pull wire can drive the first fixing section to extrude the first deformation section and the second deformation section so that the first deformation section can be bent around a first axis, and the second deformation section can be bent around a second axis. The first axis and the second axis form an included angle. According to the catheter, multi-direction bending adjustment of the catheter is achieved through the single pull wire, the design and machining difficulty is lowered, the overall structure is simplified, and the working reliability of the handle is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a multi-directional bending catheter and a multi-directional bending catheter device. Background Technology

[0002] Adjustable bendable catheters are medical devices used in cardiovascular, peripheral, or nervous system surgeries. Due to the complexity of the human body, the accuracy of positioning during interventional surgery is particularly important. To allow passage through blood vessels via different pathways, adjustable bendable catheters have the feature of adjustable distal bend, which helps doctors deliver implants more precisely to the target lesion location during surgery.

[0003] There are many types of adjustable catheters, and multi-directional adjustable catheters are commonly used in current technologies. Multi-directional adjustable catheters are typically made of medical-grade plastics and metals of varying hardness. During surgery, surgeons can adjust the degree of curvature at the distal end of the catheter as needed, ensuring safety throughout the procedure. The advantages of multi-directional adjustable catheters include adjustable curvature, good biocompatibility, and excellent durability, playing a vital role in surgical procedures.

[0004] Existing multi-directional bending catheters achieve multi-directional bending by embedding multiple sets of pull wires along the side of the catheter. The distal end of the pull wire is welded to a pull wire loop at the distal end of the multi-directional bending catheter, while the proximal end is connected to the handle. Bending is achieved by pulling the pull wire through the handle. However, traditional multi-directional bending technology uses two or more sets of pull wires, requiring the design of multiple control pull wire structures within the handle. This results in an overly complex overall handle structure and increased difficulty for doctors to operate. Utility Model Content

[0005] The purpose of this utility model is to provide a multi-directional bending guide tube and a multi-directional bending guide tube device, which uses a single pull line to achieve multi-directional bending of the guide tube, reduces the design and processing difficulty, simplifies the overall structure, and improves the working reliability of the handle.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A multi-directional bending catheter includes a catheter body and a pull wire. The catheter body includes a first fixed section, a first deformable section, a second deformable section, and a second fixed section connected sequentially from distal to proximal. The pull wire passes through the inner cavity of the catheter body. A first end of the pull wire is fixed to the first fixed section, and a second end of the pull wire extends out of the proximal end of the catheter body. The pull wire can drive the first fixed section to compress the first deformable section and the second deformable section, causing the first deformable section to bend around a first axis and the second deformable section to bend around a second axis, wherein the first axis and the second axis are set at an angle.

[0008] As an optional technical solution for multi-directional bending catheters, the catheter body includes a flexible sheath and a cutting tube. The flexible sheath has a first rigid segment, a first flexible segment, a second flexible segment, and a second rigid segment connected sequentially from the distal end to the proximal end. The cutting tube has a first tube segment and a second tube segment connected sequentially. The first tube segment is embedded in the inner ring of the first flexible segment, and the second tube segment is embedded in the inner ring of the second flexible segment. The first tube segment has a first cross-sectional area along the axial direction, and the second tube segment has a second cross-sectional area along the axial direction. At least one first cutting cross-section is distributed at intervals in the first cross-sectional area, and at least one second cutting cross-section is distributed at intervals in the second cross-sectional area. The first cutting cross-section and the second cutting cross-section have the same shape and are arranged by rotating the cutting tube 180 degrees circumferentially.

[0009] As an optional technical solution for multi-directional bending conduit, the conduit body further includes a bending ring, which is located in the inner ring of the first rigid section, and the first end of the pull wire is fixed to the bending ring.

[0010] As an optional technical solution for multi-directional bending guide tubes, the first cross-sectional area is provided with at least two first cutting sections; and / or, the second cross-sectional area is provided with at least two second cutting sections.

[0011] As an optional technical solution for the multi-directional bending catheter, the cutting tube is made of stainless steel or nickel-titanium alloy; and / or, the flexible sheath is made of medical-grade plastic.

[0012] As an optional technical solution for multi-directional bending conduit, the inner wall of the cutting tube is also fixed with a threading tube, through which the pull wire passes.

[0013] As an optional technical solution for multi-directional bending guide tubes, the first end of the pull wire is welded and fixed to the bending ring.

[0014] As an optional technical solution for the multi-directional bending conduit, the multi-directional bending conduit also includes an inner liner tube, which is inserted into the flexible sheath tube and passes through the inner ring of the bending ring and the inner tube of the cutting tube.

[0015] A multi-directional bending guide device includes an adjustment handle and the aforementioned multi-directional bending guide, wherein the second end of the pull cable is connected to the adjustment handle.

[0016] As an optional technical solution for the multi-directional bending guide device, the control handle includes a handle body, a control knob, and a traction slider. The control knob is rotatably connected to the handle body, and the traction slider is slidably connected to the handle body. The second end of the pull wire is connected to the traction slider. When the control knob rotates relative to the handle body, it drives the traction slider to move axially. The traction slider moves while pulling the pull wire.

[0017] The beneficial effects of this utility model are:

[0018] This multi-directional bending catheter employs a single pull liner. When the liner is pulled from the proximal end of the catheter, it causes the first fixed segment to compress the first and second deformable segments, resulting in the first deformable segment bending around a first axis and the second deformable segment bending around a second axis. This enhances the flexibility and adaptability of the multi-directional bending catheter, allowing the catheter body to bend in multiple directions as intended. This facilitates multi-directional bending operations, enabling it to adapt to complex vascular curvatures and improving surgical flexibility and success rates. This design significantly reduces design and manufacturing complexity, minimizes structural components, and enhances reliability, while also greatly reducing the difficulty of surgical procedures. The multi-directional bending catheter and its device are scientifically designed, structurally stable, and easy to operate. They combine high operational efficiency with good biocompatibility. The unique design of the catheter body and pull liner allows for multi-directional bending within blood vessels. Overall, the multi-directional bending catheter provides users with an efficient, safe, and convenient medical experience, possessing high practical value and market potential.

[0019] This multi-directional bending catheter device combines a control handle with the multi-directional bending catheter, enabling remote and precise control and operation of the catheter via a pull-wire control method. This ensures improved handle reliability, allowing doctors to easily control the bending operation of the multi-directional bending catheter. It provides doctors with an efficient, safe, and convenient medical operation experience, improving operational flexibility and precision, enhancing surgical safety and efficiency, and facilitating the efficient conduct of surgery. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the multi-directional bending guide provided in this embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the cutting tube provided in this embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of a bending form of the multi-directional bending conduit provided in this utility model embodiment;

[0023] Figure 4 This is a schematic diagram of another bending form of the multi-directional bending conduit provided in this embodiment of the utility model;

[0024] Figure 5 This is a cross-sectional view of the cutting tube and the pull wire provided in this embodiment of the utility model;

[0025] Figure 6This is a schematic diagram of the structure of the multi-directional bending guide device provided in this embodiment of the utility model.

[0026] In the picture:

[0027] X, first axis; Y, second axis;

[0028] 100. Bending ring; 200. Cutting tube; 210. First cutting section; 220. Second cutting section; 230. Threading tube; 300. Flexible sheath; 400. Pulling wire; 500. Control handle; 510. Handle body; 520. Control knob. Detailed Implementation

[0029] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., 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 this utility model and for 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 this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0033] like Figures 1 to 5 As shown, this embodiment provides a multi-directional bending catheter, including a catheter body and a pull wire 400. The catheter body includes a first fixed section, a first deformable section, a second deformable section, and a second fixed section connected sequentially from the distal end to the proximal end. The pull wire 400 passes through the inner cavity of the catheter body. The first end of the pull wire 400 is fixed to the first fixed section, and the second end of the pull wire 400 passes through the proximal end of the catheter body. The pull wire 400 can drive the first fixed section to squeeze the first deformable section and the second deformable section, causing the first deformable section to bend around the first axis X and the second deformable section to bend around the second axis Y, wherein the first axis X and the second axis Y are set at an angle.

[0034] This multi-directional bending catheter employs a single pull cord 400. When the pull cord 400 is pulled from the proximal end of the catheter, it compresses the first fixed section and the second deformable section, causing the first deformable section to bend around the first axis X and the second deformable section to bend around the second axis Y. This improves the flexibility and adaptability of the multi-directional bending catheter, allowing the catheter body to bend in multiple directions as expected. This facilitates multi-directional bending operations, enabling it to adapt to complex vascular bending variations and improving the flexibility and success rate of surgical procedures. This design significantly reduces design and manufacturing complexity, minimizes structural components, and enhances reliability, while also greatly reducing the difficulty of surgical procedures for doctors. The multi-directional bending catheter and its device are scientifically designed, structurally stable, and easy to operate, combining high operational efficiency with good biocompatibility. Its unique catheter body and pull cord 400 design enable multi-directional bending within blood vessels. Overall, the multi-directional bending catheter provides users with an efficient, safe, and convenient medical experience, possessing high practical value and market potential.

[0035] In this embodiment, the end that extends into the patient's body is defined as the distal end, and the end that is located outside the patient's body is defined as the proximal end.

[0036] Specifically, this embodiment only sets up a first deformation segment and a second deformation segment, thus only bending in two directions can be achieved. In other embodiments of this embodiment, the number of deformation segments connected end to end is not limited. For example, a third deformation segment adjacent to the second deformation segment can be added based on this embodiment. The third deformation segment can bend around a third axis, and the third axis is not parallel to the first axis X and the second axis Y. In this case, when the pull line 400 is pulled, the pull line 400 can drive the first fixed segment to squeeze the first deformation segment, the second deformation segment, and the third deformation segment, causing the first deformation segment, the second deformation segment, and the third deformation segment to bend in their respective preset directions. It can be understood that, based on the aforementioned embodiment, the number of deformation segments can be greater than three, and the bending directions of the deformation segments are different, thus achieving multi-directional adjustment of the bending direction of the bending guide according to actual needs.

[0037] In this embodiment, the catheter body includes a flexible sheath 300 and a cutting tube 200. The flexible sheath 300 has a first rigid segment, a first flexible segment, a second flexible segment, and a second rigid segment connected sequentially from the distal end to the proximal end. The cutting tube 200 has a first tube segment and a second tube segment connected sequentially. The first tube segment is embedded in the inner ring of the first flexible segment, and the second tube segment is embedded in the inner ring of the second flexible segment. The first tube segment has a first cross-sectional area along the axial direction, and the second tube segment has a second cross-sectional area along the axial direction. At least one first cutting section 210 is distributed at intervals in the first cross-sectional area, and at least one second cutting section 220 is distributed at intervals in the second cross-sectional area. The first cutting section 210 and the second cutting section 220 have the same shape and are arranged 180 degrees around the circumference of the cutting tube 200.

[0038] By utilizing the differentiated design of the first rigid section, first flexible section, second flexible section, and second rigid section on the flexible sheath 300, the flexibility and stability of the catheter body are increased, giving the multi-directional bending catheter excellent overall flexibility and operability, and enabling it to possess superior bending performance. Specifically, the design of the first cutting section 210 and the second cutting section 220 allows the cutting tube 200 to bend in multiple directions under the influence of the pull wire 400, ensuring that the first and second deformation sections deform as expected, thus guaranteeing the deformation capability of the multi-directional bending catheter. The catheter body adopts a combined design of the flexible sheath 300 and the cutting tube 200, achieving a combination of flexibility and bending function, thereby improving the usability of the multi-directional bending catheter.

[0039] Specifically, the rigidity of the first and second rigid segments is identical. The hardness of the second flexible segment is less than that of the first flexible segment, ensuring that the second flexible segment completes the bending process before the first flexible segment. These limitations allow doctors to accurately control the deformation sequence of the multi-directional bending catheter, ensuring that the first and second flexible segments complete the predetermined deformation in a timely manner as needed, thereby guaranteeing the effectiveness of the deformation and improving the user experience.

[0040] In this embodiment, the design that the first cutting section 210 and the second cutting section 220 have the same shape and rotate 180 degrees circumferentially around the cutting tube 200 is a preferred design. The rotation angle of the first cutting section 210 and the second cutting section 220 in the circumferential direction includes, but is not limited to, 180 degrees. In other embodiments of this embodiment, the rotation angle of the first cutting section 210 and the second cutting section 220 in the circumferential direction can be set to other rotation angles as needed, such as 60 degrees, 90 degrees, or 120 degrees.

[0041] Furthermore, the catheter body also includes a bending ring 100, which is located in the inner ring of the first rigid section, and the first end of the pull wire 400 is fixed to the bending ring 100.

[0042] The design of the bending ring 100, located in the first rigid section and extending axially along the flexible sheath 300, makes the connection of the pull wire 400 more stable, facilitating the bending adjustment of the multi-directional bending catheter during operation. Combined with the pull wire 400 being fixed to the bending ring 100 and passing through the cutting tube 200, the bending accuracy and controllability of the multi-directional bending catheter are enhanced by traction of the bending ring 100 and deformation of the cutting tube 200. This enables the bending function of the distal and middle parts of the multi-directional bending catheter, achieving precise bending of the catheter body and improving the accuracy of surgical operations.

[0043] In one embodiment of this invention, the first cross-sectional area is provided with at least two first cutting sections 210, and the second cross-sectional area is provided with at least two second cutting sections 220.

[0044] By limiting the number of cutting sections in the first and second section areas, the deformation effect of the cutting tube 200 is ensured, which helps to improve the accuracy of the multi-directional bending guide tube's operation, making the multi-directional bending guide tube more flexible and practical in operation, and further enhancing the working efficiency of the multi-directional bending guide tube.

[0045] Specifically, the cross-sectional area is equipped with 10 to 20 cutting sections, each with a width of 0.5mm-1mm and a spacing of 1mm between adjacent sections. The flexible section's bending design allows the multi-directional bending guide to better adapt to the human body structure and reach the target position. Too many cutting sections would complicate the manufacturing process of the multi-directional bending guide; too few would result in insufficient bending angles to meet usage requirements.

[0046] In another embodiment of this invention, only the first cross-sectional area has at least two first cutting sections 210. In yet another embodiment of this invention, only the second cross-sectional area has at least two second cutting sections 220. The number of cutting sections is set according to actual needs to meet different surgical requirements.

[0047] In this embodiment, the cutting tube 200 is made of stainless steel or nickel-titanium alloy.

[0048] The cutting tube 200 is made of materials such as stainless steel or nickel-titanium alloy, which ensures the structural strength, corrosion resistance, flexibility and biocompatibility of the multi-directional bending catheter during long-term use, and ensures the biosafety of the multi-directional bending catheter during surgery.

[0049] For example, the flexible sheath 300 is made of medical-grade plastic.

[0050] The flexible sheath 300 is made of medical-grade plastic, ensuring its safety and non-toxicity in medical environments. The material selection also guarantees the strength, flexibility, safety, and biocompatibility of the multi-directional bending catheter. The flexible sheath 300 is wrapped around the outer periphery of the cutting tube 200 using a heat-shrink process to prevent axial sliding between the cutting tube 200 and the flexible sheath 300.

[0051] Specifically, medical-grade plastics can be used in different degrees of hardness depending on the design structure. When the traction cable is 400 degrees, the softer part of the medical-grade plastic is bent first, and then the harder part of the medical-grade plastic is bent.

[0052] The following are three examples of flexible sheath material 300 used in actual engineering projects:

[0053] Example 1: The first rigid section is made of Pebax 7233 and has a length of 5mm; the second rigid section is made of Pebax 7233 and has a length of 700mm; the first flexible section is made of Pebax 5533 and has a length of 50mm; and the second flexible section is made of Pebax 3533 and has a length of 30mm. This multi-directional bending catheter with the flexible sheath 300 is used in cardiovascular surgery.

[0054] Example 2: The first rigid segment is made of Pebax 5533 and is 3mm long; the second rigid segment is made of Pebax 7233 and is 1000mm long; the first flexible segment is made of Pebax 4533 and is 50mm long; the second flexible segment is made of Pebax 2533 and is 50mm long. This multi-directional bending catheter with the flexible sheath 300 is used in neurovascular surgery.

[0055] Example 3: The first rigid segment is made of Pebax 5533 and is 3mm long; the second rigid segment is made of Pebax 7233 and is 800mm long; the first flexible segment is made of Pebax 3533 and is 100mm long; and the second flexible segment is made of Pebax 2533 and is 80mm long. This multi-directional bending catheter with the flexible sheath 300 is used in peripheral vascular surgery.

[0056] The above design uses a variety of high-polymer medical plastics with different degrees of softness and hardness to achieve different stages and degrees of bending effect at various points of the flexible sheath 300.

[0057] In this embodiment, a threading tube 230 is also fixedly connected to the inner wall of the cutting tube 200, and the pull wire 400 passes through the threading tube 230.

[0058] Several types of suture tubes 230 are fixed to the inner wall of the cutting tube 200, enabling smooth passage of the pull suture 400 and reducing resistance during its movement. The contact between the pull suture 400 and the suture tube 230 ensures smooth force application from the pull suture 400 to the cutting tube 200, reducing wear on the pull suture 400 and thus guaranteeing stable operation. This allows the cutting tube 200 to deform smoothly as expected, extending the service life of the multi-directional bending catheter and improving the smoothness of surgical procedures. This design enhances the precise fit between the pull suture 400 and the cutting tube 200, ensuring the accuracy of the multi-directional bending catheter's deformation. Simultaneously, the suture tube 230 also protects the pull suture 400, enhancing the stability and durability of the multi-directional bending catheter.

[0059] For example, the first cutting section 210 is rectangular in shape. Since the first cutting section 210 and the second cutting section 220 have the same shape, the second cutting section 220 is also rectangular in shape.

[0060] The use of rectangular first cutting section 210 and second cutting section 220 enables more effective deformation, ensuring the deformation capability of the cutting tube 200, while also adapting to different deformation requirements, thereby enhancing the operational performance and working efficiency of the multi-directional bending guide tube.

[0061] In this embodiment, the first end of the pull wire 400 is welded and fixed to the bending ring 100.

[0062] The welding and fixing of the first end of the pull wire 400 to the bending ring 100 enhances the connection strength between the two, improves the durability of the pull wire 400, ensures the stability and reliability of the multi-directional bending catheter during operation, and improves the safety of the surgery.

[0063] For example, the multi-directional bending conduit also includes an inner liner tube that passes through the flexible sheath tube 300 and through the inner ring of the bending ring 100 and the inner tube of the cutting tube 200.

[0064] The addition of the inner liner further enhances the smoothness and operability of the multi-directional bending catheter, which can further improve the overall stability and operability of the multi-directional bending catheter. At the same time, the inner liner protects the blood vessels, reduces the damage to the multi-directional bending catheter during the operation, protects the bending ring 100 and the cutting tube 200, and extends the patency and service life of the multi-directional bending catheter.

[0065] like Figures 1 to 6 As shown, this embodiment also provides a multi-directional bending conduit device, including an adjustment handle 500 and the aforementioned multi-directional bending conduit, with the second end of the pull wire 400 connected to the adjustment handle 500.

[0066] This multi-directional bending catheter device, through the combination of the control handle 500 and the multi-directional bending catheter, and by controlling the pull wire 400, achieves remote and precise control and operation of the multi-directional bending catheter. This ensures improved handle reliability, allowing doctors to easily control the bending operation of the multi-directional bending catheter, providing doctors with an efficient, safe, and convenient medical operation experience, improving operational flexibility and precision, enhancing surgical safety and efficiency, and facilitating efficient surgical procedures.

[0067] In this embodiment, the control handle 500 includes a handle body 510, a control knob 520, and a traction slider. The control knob 520 is rotatably connected to the handle body 510, and the traction slider is slidably connected to the handle body 510. The second end of the pull cable 400 is connected to the traction slider. When the control knob 520 rotates relative to the handle body 510, it drives the traction slider to move axially. While the traction slider moves, it pulls the pull cable 400.

[0068] The design of the traction slider within the control handle 500 enables precise control of the pull wire 400, facilitating accurate operation of the multi-directional bending catheter. Rotating the control knob 520 moves the traction slider axially, thereby pulling the pull wire 400 and achieving the bending function of the multi-directional bending catheter, further enhancing its operational performance. These improvements give the control handle 500 remote control capabilities, allowing for wide application in medical surgery. Its rational design, stable structure, and simple operation provide an efficient, precise, and easy-to-use surgical tool, improving the convenience and success rate of surgery, and demonstrating high practical value and market potential.

[0069] The structural design, material selection, and operation method of the control handle 500 are all designed to meet the high requirements of medical surgery, enabling precise control and improving the flexibility and convenience of multi-directional bending catheter movements.

[0070] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A multi-directional bending catheter, characterized by, The multi-directional bending catheter comprises a catheter body and a pull wire (400), the catheter body comprises a first fixed section, a first deformation section, a second deformation section and a second fixed section connected in sequence from a distal end to a proximal end, the pull wire (400) penetrates the inner cavity of the catheter body, the first end of the pull wire (400) is fixed to the first fixed section, the second end of the pull wire (400) penetrates the proximal end of the catheter body, and the pull wire (400) can drive the first fixed section to extrude the first deformation section and the second deformation section, so that the first deformation section bends around a first axis (X) and the second deformation section bends around a second axis (Y), wherein the first axis (X) and the second axis (Y) are arranged at an included angle.

2. The multi-directional bending guide catheter of claim 1, wherein, The catheter body comprises a flexible sheath tube (300) and a cutting tube (200), the flexible sheath tube (300) has a first rigid section, a first flexible section, a second flexible section and a second rigid section connected in sequence from a distal end to a proximal end, the cutting tube (200) has a first tube section and a second tube section connected in sequence, the first tube section is embedded in the inner ring of the first flexible section, the second tube section is embedded in the inner ring of the second flexible section, the first tube section is provided with a first cross section area in the axial direction, the second tube section is provided with a second cross section area in the axial direction, at least one first cutting cross section (210) is distributed in the first cross section area, and at least one second cutting cross section (220) is distributed in the second cross section area, the first cutting cross section (210) and the second cutting cross section (220) are the same in shape and are arranged at a circumferential rotation of 180 degrees of the cutting tube (200).

3. The multi-directional bending guide catheter of claim 2, wherein, The catheter body further comprises a bending adjustment ring (100), the bending adjustment ring (100) is arranged in the inner ring of the first rigid section, and the first end of the pull wire (400) is fixed to the bending adjustment ring (100).

4. The multi-directional bending guide catheter of claim 2, wherein, The first cross section area is provided with at least two first cutting cross sections (210); and / or, The second cross section area is provided with at least two second cutting cross sections (220).

5. The multi-directional bending guide catheter of claim 2, wherein, The material of the cutting tube (200) is stainless steel or nickel-titanium alloy; and / or, The material of the flexible sheath tube (300) is medical-grade plastic.

6. The multi-directional bending guide catheter of claim 3, wherein, The inner wall of the cutting tube (200) is further fixedly connected with a threading tube (230), and the pull wire (400) penetrates the threading tube (230).

7. The multi-directional bending guide catheter of claim 3, wherein, The first end of the pull wire (400) is welded and fixed to the bending adjustment ring (100).

8. The multi-directional bending guide catheter of claim 7, wherein, The multi-directional bending catheter further comprises an inner lining tube, the inner lining tube is arranged in the flexible sheath tube (300) and penetrates the inner ring of the bending adjustment ring (100) and the inner tube of the cutting tube (200).

9. A multi-directional bending catheter device, characterized by, The multi-directional bending catheter comprises a control handle (500) and the multi-directional bending catheter of any one of claims 1-8, and the second end of the pull wire (400) is connected to the control handle (500).

10. The multi-directional bending guide catheter device of claim 9, wherein, The control handle (500) comprises a handle body (510), a control knob (520) and a traction slider, the control knob (520) is rotationally connected to the handle body (510), the traction slider is slidingly connected to the handle body (510), the second end of the pull wire (400) is connected to the traction slider, the control knob (520) rotates relative to the handle body (510) to drive the traction slider to move axially, and the traction slider moves while pulling the pull wire (400).

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