Angiographic catheter

Abstract

The utility model relates to an angiographic catheter. The angiographic catheter comprises a catheter body, a straightening tube and a connector, the catheter body is provided with an infusion channel, the two ends of the catheter body are provided with an infusion inlet and an infusion outlet respectively, the infusion inlet and the infusion outlet are both communicated with the infusion channel, the end, at the infusion outlet, of the catheter body is provided with a shaping part, and the shaping part is of a bent structure. The connector is connected to the infusion inlet. The straightening pipe is movably arranged outside the pipe body in a sleeving mode and used for straightening the shaping part to be of a linear structure. The angiographic catheter has the advantages of being convenient to operate and high in efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a contrast catheter. BACKGROUND

[0002] In the process of treating peripheral vascular stenosis, two steps including angiography and treatment are included. Among them, angiography is to understand the condition of blood vessels, observe lesions and determine the degree of stenosis to prepare for treatment. After treatment, angiography is needed again to compare with the preoperative blood vessel patency and evaluate the residual stenosis.

[0003] Angiography is to place a guide wire into a blood vessel, then insert a contrast catheter along the guide wire into the blood vessel, and inject contrast medium through the contrast catheter in the blood vessel or other cavity to make the part clearly visible in X-ray, CT and other imaging examinations. However, the shaping part at the front end of the contrast catheter can be set as a curved shape to adapt to different anatomical sites and operation requirements. When the curved shaping part at the front end of the contrast catheter is inserted into the guide wire, there is a situation of difficult insertion, which has the defects of poor convenience and low efficiency. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a contrast catheter aiming at the problems of poor convenience and low efficiency in use of the contrast catheter.

[0005] A contrast catheter comprises:

[0006] A pipe body is provided with a transfusion channel, two ends of the pipe body are respectively provided with a transfusion inlet and a transfusion outlet, the transfusion inlet and the transfusion outlet are both in communication with the transfusion channel, and the pipe body is provided with a shaping part at one end of the transfusion outlet, and the shaping part is a curved structure.

[0007] A joint is connected to the transfusion inlet; and

[0008] A straightening pipe is movably sleeved on the outside of the pipe body along the axial direction of the pipe body, and the straightening pipe is used to correct the shaping part to be a straight line structure.

[0009] In one of the embodiments, the straightening pipe comprises a straightening part and a connecting part, the straightening part is arranged around the pipe body, the straightening part is provided with a notch, the notch penetrates through the straightening part along the axial direction of the pipe body, the connecting part is arranged in the notch, and the connecting part is connected with the straightening part on both sides to arrange the connecting part and the straightening part in a ring structure and surround the periphery of the pipe body.

[0010] In one of the embodiments, the material of the connecting part is a tearable material; or,

[0011] The connecting portion has a body and an adhesive layer provided on the body, and the body is detachably connected to the straightening portion through the adhesive layer.

[0012] In one embodiment, the connecting portion is provided with a tearable opening, which is arranged at an end of the connecting portion along the straightening tube axis direction.

[0013] In one embodiment, the notch includes a first sub-notch and a second sub-notch, the connecting portion includes a first sub-connecting portion and a second sub-connecting portion, the first sub-notch and the second sub-notch are arranged along the circumference of the straightening portion, the first sub-notch penetrates the straightening portion along the axial direction of the tube body, the second sub-notch penetrates the straightening portion along the axial direction of the tube body, the first sub-connecting portion is arranged at the first sub-notch, both sides of the first sub-connecting portion are connected to the straightening portion, the second sub-connecting portion is arranged at the second sub-notch, both sides of the second sub-connecting portion are connected to the straightening portion, so that the first sub-connecting portion, the straightening portion and the second sub-connecting portion are arranged in a ring structure and surround the outer periphery of the tube body.

[0014] In one embodiment, the straightening tube further includes a first holding portion and a second holding portion, and the first holding portion and the second holding portion are arranged on the outer side wall of the straightening portion along the circumference of the straightening portion.

[0015] In one embodiment, one end of the first holding portion is smoothly connected to one end of the straightening portion, and a first groove is arranged between the other end of the first holding portion and the straightening portion; one end of the second holding portion is smoothly connected to one end of the straightening portion, and a second groove is arranged between the other end of the second holding portion and the straightening portion.

[0016] In one embodiment, the first holding portion is provided with a third groove along the circumference of the straightening tube; and the second holding portion is provided with a fourth groove along the circumference of the straightening tube.

[0017] In one embodiment, the end of the first holding portion provided with the first groove is arranged away from the straightening portion, and the end of the second holding portion provided with the second groove is arranged away from the straightening portion.

[0018] In one embodiment, the outer surface of the tube body is provided with a scale or a mark.

[0019] The contrast guide tube is characterized in that a transfusion channel is arranged in the tube body, the transfusion inlet and the transfusion outlet arranged in the tube body are connected with the transfusion channel, a connector is connected to the transfusion inlet, the connector is used for connecting a syringe or a contrast agent injection device, a curved shaping part is arranged at one end of the transfusion outlet, and the curved shaping part is suitable for different anatomical parts and operation requirements. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A structure schematic diagram of the contrast guide tube is shown in the embodiment of the present application.

[0021] Figure 2 A straightening use schematic diagram of the contrast guide tube is shown in the embodiment of the present application.

[0022] Figure 3 A tearing schematic diagram of the straightening tube of the contrast guide tube is shown in the embodiment of the present application.

[0023] Figure 4 A structure schematic diagram of the straightening tube of the contrast guide tube is shown in the embodiment of the present application.

[0024] Figure 5 An axial structure schematic diagram of the straightening tube of the contrast guide tube is shown in the embodiment of the present application.

[0025] REFERENCE SIGNS

[0026] 100, tube body; 100A, transfusion channel; 100B, transfusion inlet; 100C, transfusion outlet; 110, shaping part;

[0027] 200, straightening tube; 210, straightening part; 210A, notch; 211A, first sub-notch; 212A, second sub-notch; 220, connecting part; 220A, easy-to-tear opening; 221, first sub-connecting part; 222, second sub-connecting part; 230, first holding part; 230A, first groove; 230B, third groove; 240, second holding part; 240A, second groove; 240B, fourth groove;

[0028] 300, connector;

[0029] 10, guide wire. DETAILED DESCRIPTION

[0030] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described herein and by one of ordinary skill in the art without departing from the spirit and scope of the present application, and it is therefore intended that all such variations be considered as falling within the scope of the present application. It should be understood that the use of the terms "include", "comprise" or "contain" herein should not be understood as limiting the present application to the features or steps described herein, but rather the use of these terms is intended to cover the presence of the features or steps described herein as well as the presence of other features or steps not described herein.

[0031] In the description of the present application, it should be understood that, if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0032] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first", "second" can include at least one of the features explicitly or implicitly. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0033] In the present application, unless otherwise specifically defined and limited, if the terms "mount", "connect", "connect", "fix" and the like appear, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In the present application, unless specifically defined and limited otherwise, if there is a description of a first feature on or above or below a second feature, it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature can be above or above or above the second feature, which can be directly above or obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height. The first feature can be below or below or below the second feature, which can be directly below or obliquely below the second feature, or only means that the first feature is lower than the second feature in horizontal height.

[0035] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be an intermediate element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

[0036] Referring to Figures 1 to 3 , a structure diagram of a contrast catheter in an embodiment of the present application is shown, which includes a tube body 100, a straightening tube 200 and a connector 300. The tube body 100 is provided with a liquid delivery channel 100A. The tube body 100 is provided with a liquid delivery inlet 100B and a liquid delivery outlet 100C, which can be disposed at both ends of the tube body 100. The liquid delivery inlet 100B and the liquid delivery outlet 100C are in communication with the liquid delivery channel 100A. The tube body 100 is provided with a shaping portion 110 at one end of the liquid delivery outlet 100C. The shaping portion 110 is a curved tube structure. The tube body 100 has a certain elasticity and flexibility, so as to be able to smoothly pass through blood vessels or other cavities. The connector 300 is connected to the liquid delivery inlet 100B of the tube body 100. The connector 300 is used to connect a syringe or a contrast agent injection device. The straightening tube 200 is movably sleeved on the outside of the tube body 100 along the axial direction of the tube body 100. The straightening tube 200 is used to straighten the shaping portion 110 into a straight structure.

[0037] The contrast medium catheter provided by the embodiment of the present application has the following advantages. The infusion channel 100A is arranged on the tube body 100, and the infusion inlet 100B and the infusion outlet 100C arranged on the tube body 100 are connected with the infusion channel 100A. The connector 300 is connected to the infusion inlet 100B, and the connector 300 is used to connect a syringe or a contrast medium injection device. The contrast medium is delivered into the infusion channel 100A, and then injected into a blood vessel through the infusion outlet 100C. The shaping part 110 with different bending shapes is arranged at one end of the infusion outlet 100B, so as to be suitable for different anatomical sites and operation requirements. When the tube body 100 is inserted into the guide wire 10, the straightening tube 200 outside the tube body 100 is pushed to the shaping part 110 of the tube body 100, so that the straightening tube 200 straightens the shaping part 110, thereby enabling the staff to conveniently insert the tube body 100 into the guide wire 10.

[0038] The contrast medium catheter provided by the embodiment of the present application has the following advantages. The infusion channel 100A is arranged on the tube body 100, and the infusion inlet 100B and the infusion outlet 100C arranged on the tube body 100 are connected with the infusion channel 100A. The connector 300 is connected to the infusion inlet 100B, and the connector 300 is used to connect a syringe or a contrast medium injection device. The contrast medium is delivered into the infusion channel 100A, and then injected into a blood vessel through the infusion outlet 100C. The shaping part 110 with different bending shapes is arranged at one end of the infusion outlet 100B, so as to be suitable for different anatomical sites and operation requirements. When the tube body 100 is inserted into the guide wire 10, the straightening tube 200 outside the tube body 100 is pushed to the shaping part 110 of the tube body 100, so that the straightening tube 200 straightens the shaping part 110, thereby enabling the staff to conveniently insert the tube body 100 into the guide wire 10.

[0039] In combination Figure 4 The structure of the straightening tube 200 of the contrast medium catheter in the embodiment of the present application is shown in FIG. 2. In some embodiments, the straightening tube 200 includes a straightening part 210 and a connecting part 220. The straightening part 210 is arranged around the tube body 100. The straightening part 210 is provided with a notch 210A, and the notch 210A penetrates the straightening part 210 along the axial direction of the tube body 100. The connecting part 220 is arranged in the notch 210A, and the two sides of the connecting part 220 are connected with the straightening part 210, so that the connecting part 220 and the straightening part 210 are arranged in a ring structure and surround the outer periphery of the tube body 100. The straightening part 210 is arranged around the tube body 100. The notch 210A is arranged on the straightening part 210, and the connecting part 220 is filled in the notch 210A. The connecting part 220 is connected with the straightening part 210 to form a complete ring structure. The ring structure of the straightening tube 200 is slid on the tube body 100 to the shaping part 110, so as to straighten the shaping part 110.

[0040] In an exemplary embodiment, the material of the straightening part 210 is hard plastic, so that the straightening channel 200A of the straightening tube 200 maintains a straight line state, and the end of the tube body 100 is straightened.

[0041] Further, the side of the straightening part 210 close to the tube body 100 is provided with a circular arc surface, so that the straightening part 210 has better adhesion to the tube body 100, thereby improving the straightening degree of the tube body 100.

[0042] In an alternative embodiment, the straightening tube 200 on the tube body 100 cannot be removed or is inconvenient to remove after the guide wire 10 is inserted into the contrast catheter, thus affecting the operation during the operation. Therefore, as shown in Figure 3 the embodiment, the material of the connecting portion 220 is set to be a tearable material, so that the connecting portion 220 can be easily torn along the extension direction of the tube body 100 when subjected to a certain external force. After the guide wire 10 is inserted into the contrast catheter, the connecting portion 220 can be torn, so that the gap 210A of the straightening portion 210 is opened, thus conveniently separating the straightening tube 200 from the tube body 100, avoiding the influence of the straightening tube 200 on the operation during the operation, and having the advantage of convenient use.

[0043] In other embodiments, the connecting portion 220 has a body and an adhesive layer provided on the body, and the body is detachably connected to the straightening portion 210 through the adhesive layer. By detachably connecting the body of the connecting portion 220 to the straightening portion 210 through the adhesive layer, when it is necessary to disassemble the straightening tube 200, the adhesive layer is torn, thus opening the gap 210A of the straightening portion 210, conveniently disassembling the straightening tube 200 from the tube body 100, and avoiding the influence of the straightening tube 200 on the operation during the operation.

[0044] In an alternative embodiment, as shown in Figure 4 the connecting portion 220 is provided with a tearable opening 220A, which is arranged at the end of the connecting portion 220 along the axis direction of the straightening tube 200. In order to conveniently tear the connecting portion 220, the tearable opening 220A is arranged at the end, so that the connecting portion 220 is more convenient to tear, and the use convenience of the contrast catheter is improved.

[0045] In an alternative embodiment, as shown in Figure 5As shown, the gap 210A includes a first sub-gap 211A and a second sub-gap 212A, the connecting portion 220 includes a first sub-connecting portion 221 and a second sub-connecting portion 222, the first sub-gap 211A and the second sub-gap 212A are arranged along the circumference of the straightening portion 210, the first sub-gap 211A penetrates the straightening portion 210 along the axial direction of the pipe body 100, the second sub-gap 212A penetrates the straightening portion 210 along the axial direction of the pipe body 100, the first sub-connecting portion 221 is arranged at the first sub-gap 212A, both sides of the first sub-connecting portion 221 are connected with the straightening portion 210, the second sub-connecting portion 222 is arranged at the second sub-gap 212A, both sides of the second sub-connecting portion 222 are connected with the straightening portion 210, so that the first sub-connecting portion 221, the straightening portion 210 and the second sub-connecting portion 222 are arranged in a ring structure and surround the outer periphery of the pipe body 100. The straightening portion 210 is divided into two separate bodies by the first sub-gap 211A and the second sub-gap 212A, and the two separate bodies are connected by the first sub-connecting portion 221 and the second sub-connecting portion 222. When it is necessary to disassemble the straightening pipe 200, the first sub-connecting portion 221 and the second sub-connecting portion 222 are torn off, the straightening portion 210 is divided into two separate bodies, and the two separate bodies are taken off from both sides, which has the advantage of convenient operation.

[0046] In an alternative embodiment, as shown in Figure 4 The straightening pipe 200 includes a first holding portion 230 and a second holding portion 222, which are arranged on the outer side wall of the straightening portion 210 along the circumference of the straightening portion 210. In order to improve the convenience of use of the straightening pipe 200, the first holding portion 230 and the second holding portion 222 are arranged on both sides of the straightening portion 210, so that the worker can push and adjust the position of the straightening pipe 200 by holding the first holding portion 230 and the second holding portion 222, which makes the adjustment more convenient and accurate.

[0047] In an exemplary embodiment, as shown in Figure 4As shown, one end of the first holding part 230 is smoothly connected with one end of the straightening part 210, and the other end of the first holding part 230 is provided with a first groove 230A relative to the straightening part 210; one end of the second holding part 240 is smoothly connected with one end of the straightening part 210, and the other end of the second holding part 240 is provided with a second groove 240A relative to the straightening part 210. That is, the first holding part 230 and the second holding part 240 are integrally connected with the straightening part 210. In the embodiment, the first holding part 230 and the second holding part 240 are part of the straightening part 210 extended and folded, so that the first groove 230A is formed between the first holding part 230 and the straightening part 210, and the second groove 240A is formed between the second holding part 240 and the straightening part 210, so that the overall machining process of the straightening tube 200 is simple, the structural strength meets the requirements, the structure of the first groove 230A and the second groove 240A can save production materials, and the overall structure is simple and practical.

[0048] Further, as shown in Figure 4 , the first holding part 230 is provided with a third groove 230B along the circumference of the straightening tube 200; the second holding part 240 is provided with a fourth groove 240B along the circumference of the straightening tube 200. By providing the third groove 230B and the fourth groove 240B, the staff can hold the first holding part 230 and the second holding part 240 more in line with the shape of the hand, so that the straightening tube 200 is more convenient to use and the experience is good.

[0049] Further, as shown in Figure 4 , the end of the first holding part 230 provided with the first groove 230A is away from the straightening part 210, and the end of the second holding part 240 provided with the second groove 240A is away from the straightening part 210, that is, the end of the first holding part 230 and the end of the second holding part 240 are outwardly tilted, so that when the staff pushes the straightening tube 200, the hand can abut against the tilted end, so that the straightening tube 200 is more ergonomic when pushed and the experience is better.

[0050] In an optional embodiment, the outer surface of the tube body 100 is provided with scales or marks, which can be used to indicate the depth and position of the insertion of the tube body 100, helping the doctor to accurately grasp the position of the tube body 100 and ensure that the contrast agent can be accurately injected into the target site.

[0051] In an optional embodiment, as shown in Figures 1 to 3As shown, the shape of the shaping portion 110 is a bend or pigtail shape. Different shaping portion 110 shapes are suitable for different anatomical sites and operational needs. The bend-shaped shaping portion 110 can better adapt to the curved parts of the blood vessels according to different bending angles and shapes, while the pigtail-shaped catheter tip is curled like a pigtail, which is commonly used in cardiovascular angiography and other examinations, and can form a better contrast agent filling effect in the blood vessels.

[0052] In an optional embodiment, the material of the tube body 100 is medical plastic, which has good flexibility and operability, good compatibility with human tissues and blood, and is not easy to cause allergic reactions or inflammation and other adverse reactions. Further, the length and diameter of the tube body 100 are different according to different use sites and purposes. The length of the commonly used tube body 100 is between 50 cm and 150 cm, and the diameter is between 1 mm and several mm.

[0053] In an optional embodiment, the connector 300 is a luer connector 300. The connector 300 of the contrast catheter generally adopts a standard luer connector, which is a standardized medical connector design. The luer connector is composed of a conical male connector and a matching female connector, which are tightly connected by rotation or insertion. This design can ensure the firm connection between the contrast catheter and the syringe or other contrast agent injection device, preventing the leakage of contrast agent.

[0054] Further, the material of the connector 300 is usually selected from medical grade plastics such as polycarbonate and polypropylene. These plastics have good biocompatibility, chemical stability and mechanical strength, and can withstand the chemical corrosion of contrast agent and the pressure during injection, while not causing adverse effects on the human body.

[0055] Further, the input end of the connector 300 is provided with a gasket, which further ensures the tight connection of the connector 300 with the syringe or other contrast agent injection device, preventing the leakage of contrast agent.

[0056] The contrast catheter described in the embodiments of the present application has the following beneficial effects:

[0057] 1. By providing the movable straightening tube 200 on the tube body 100, the shaping portion 110 can be straightened to a straight state after the straightening tube 200 is pushed to the shaping portion 110, so that the guide wire 10 can be easily inserted from the infusion outlet 100C, which has the advantages of convenient operation and high efficiency.

[0058] 2. After the guide wire 10 is inserted into the contrast catheter, the connecting portion 220 can be torn, so that the gap 210A of the straightening portion 210 is opened, thereby facilitating the separation of the straightening tube 200 from the tube body 100, avoiding the influence of the straightening tube 200 on the operation during the operation, and having the advantage of convenient use.

[0059] Any combination of the technical features in the above-described embodiments can be made. For the sake of brevity, the foregoing description is not intended to be exhaustive or to limit the scope of the application to the precise form disclosed. Modifications and alterations can occur to others upon reading and understanding the disclosure. Accordingly, the scope of the application is intended to be limited only by the appended claims.

[0060] The above-described embodiments are merely illustrative of several embodiments of the present application, and the description is relatively specific and detailed, but should not be construed as limiting the scope of the patent application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of the patent of the present application should be subject to the appended claims.

Claims

1. A contrast catheter, characterized in that, include: The tube body (100) is provided with an infusion channel (100A), an infusion inlet (100B) and an infusion outlet (100C), both of which are connected to the infusion channel (100A). The tube body (100) is provided with a shaping part (110) at one end of the infusion outlet (100C), and the shaping part (110) is a curved structure. Connector (300), said connector (300) being connected to the infusion inlet (100B); and A straightening tube (200) is movably sleeved on the outside of the tube body (100) along the axial direction of the tube body (100). The straightening tube (200) is used to correct the straight structure of the shaping part (110).

2. The angiography catheter according to claim 1, characterized in that: The straightening tube (200) includes a straightening section (210) and a connecting section (220). The straightening section (210) is arranged around the tube body (100). The straightening section (210) has a notch (210A). The notch (210A) passes through the straightening section (210) along the axial direction of the tube body (100). The connecting section (220) is arranged at the notch (210A), and both sides of the connecting section (220) are connected to the straightening section (210), so that the connecting section (220) and the straightening section (210) are arranged in a ring structure and surround the outer periphery of the tube body (100).

3. The angiography catheter according to claim 2, characterized in that: The connecting part (220) is made of a tearable material; or, The connecting part (220) has a body and an adhesive layer disposed on the body, the body being detachably connected to the straightening part (210) through the adhesive layer.

4. The angiography catheter according to claim 3, characterized in that: The connecting part (220) is provided with an easy-tear opening (220A), which is located at the end of the connecting part (220) along the axial direction of the straightening tube (200).

5. The angiography catheter according to claim 2, characterized in that: The notch (210A) includes a first sub-notch (211A) and a second sub-notch (212A), and the connecting portion (220) includes a first sub-connecting portion (221) and a second sub-connecting portion (222). The first sub-notch (211A) and the second sub-notch (212A) are spaced apart circumferentially along the straightening portion (210). The first sub-notch (211A) penetrates the straightening portion (210) axially along the tube body (100), and the second sub-notch (212A) penetrates the straightening portion axially along the tube body (100). 210), the first sub-connecting part (221) is disposed at the first sub-notch (211A), and both sides of the first sub-connecting part (221) are connected to the straightening part (210). The second sub-connecting part (222) is disposed at the second sub-notch (212A), and both sides of the second sub-connecting part (222) are connected to the straightening part (210), so that the first sub-connecting part (221), the straightening part (210) and the second sub-connecting part (222) are arranged in a ring structure and surround the outer periphery of the tube body (100).

6. The angiography catheter according to claim 5, characterized in that: The straightening tube (200) further includes a first gripping part (230) and a second gripping part (240), the first gripping part (230) and the second gripping part (240) being disposed at circumferential intervals on the outer side wall of the straightening part (210).

7. The angiography catheter according to claim 6, characterized in that: One end of the first gripping part (230) is smoothly connected to one end of the straightening part (210), and a first groove (230A) is provided between the other end of the first gripping part (230) and the straightening part (210); one end of the second gripping part (240) is smoothly connected to one end of the straightening part (210), and a second groove (240A) is provided between the other end of the second gripping part (240) and the straightening part (210).

8. The angiography catheter according to claim 7, characterized in that: The first gripping part (230) is provided with a third groove (230B) along the circumference of the straightening tube (200); the second gripping part (240) is provided with a fourth groove (240B) along the circumference of the straightening tube (200).

9. The angiography catheter according to claim 7, characterized in that: The first gripping part (230) is positioned with the end of the first groove (230A) away from the straightening part (210), and the second gripping part (240) is positioned with the end of the second groove (240A) away from the straightening part (210).

10. The angiography catheter according to any one of claims 1-9, characterized in that: The outer surface of the tube (100) is provided with scales or markings.

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