Angiographic catheter

Abstract

The angiographic catheter comprises a main body part, a first front end section and a second front end section, the first front end section and the second front end section are located on the same side of the main body part in the first direction, the first front end section is provided with a first end and a second end, the second front end section is provided with a third end and a fourth end, and the fourth end is spaced from the main body part in the first direction. The first front end section is far away from the main body part in the extending direction far away from the first end part, the first front end section is far away from the main body part in the first direction and the second direction, and the second front end section is far away from the third end part in the extending direction far away from the third end part, the second front end section is far away from the main body part in the first direction, and the second front end section is far away from the second end part in the second direction; the first front end section and the second front end section are arranged on the main body part and located on the side, close to the main body part, of the second end part, the first front end section and the second front end section can deform when being extruded in the second direction, and the second front end section can deform when being extruded in the first direction. The angiographic catheter can extend into the far end of the subclavian artery.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of angiography equipment, and particularly relates to an angiography catheter. BACKGROUND

[0002] In the prior art, when performing angiography on an artery, a pigtail catheter is usually used to extend to the distal end of the artery, and an angiography agent is delivered into the artery.

[0003] However, the inner diameters of the left subclavian artery and the right subclavian artery are small, and the existing catheter is difficult to extend to the distal end of the left subclavian artery and the right subclavian artery. CONTENT OF THE UTILITY MODEL

[0004] The present application aims to at least solve the problem that the existing catheter is difficult to extend to the distal end of the left subclavian artery and the right subclavian artery. The purpose is achieved in the following manner:

[0005] The present application provides an angiography catheter, which comprises a main body part and a front end part. The front end part comprises a first front end section and a second front end section located on the same side of the main body part in a first direction, the first front end section has a first end part and a second end part, the second front end section has a third end part and a fourth end part, the first end part is connected with the main body part, the second end part is connected with the third end part, the fourth end part is spaced from the main body part in the first direction, in the extension direction of the first end part away from the first end part of the first front end section, the first front end section is away from the main body part in the first direction and the second direction, in the extension direction of the third end part away from the third end part of the second front end section, the second front end section is away from the main body part in the first direction, the second front end section is away from the second end part in the second direction and is located on the side of the second end part close to the main body part, the first front end section and the second front end section are configured to be capable of deforming when being pressed in the second direction, the second front end section is further configured to be capable of deforming when being pressed in the first direction, and the first direction and the second direction are perpendicular.

[0006] The angiography catheter of the present application, the second front end section is configured to be able to deform when being pressed along the first direction, thereby, when the second front end section enters the subclavian artery and is pressed along the first direction, the second front end section is able to reduce the size of the front end part in the first direction by deforming, so that the angiography catheter is easy to extend to the distal end of the subclavian artery. Since the fourth end part is spaced apart from the main body part in the first direction, the second front end section has a larger deformation space, so as to further facilitate the extension of the angiography catheter to the distal end of the subclavian artery. The first front end section and the second front end section are both configured to be able to deform when being pressed along the second direction, when the first front end section and the second front end section enter the subclavian artery and are pressed along the second direction, the first front end section and the second front end section deform, thereby being able to adjust the position and shape of the second front end section, so that the second front end section is more easily deformed in the first direction, so that the angiography catheter is easy to extend to the distal end of the subclavian artery. The first front end section and the second front end section are both configured to be able to deform when being pressed along the second direction, which can also reduce the size of the front end part extending out of the main body part in the second direction, thereby facilitating the extension of the angiography catheter to the distal end of the subclavian artery. In the extension direction away from the first end part, the first front end section is away from the main body part in the first direction and the second direction, and in the extension direction away from the third end part, the second front end section is away from the main body part in the first direction, and the second front end section is away from the second end part in the second direction, which can increase the contact area of the front end part with the blood vessel, thereby being able to reduce the damage to the blood vessel caused by the front end part contacting the blood vessel. In addition, the first front end section and the second front end section are both configured to be able to deform when being pressed along the second direction, which can enable the first front end section and the second front end section to buffer the pressure from the second direction, thereby reducing the damage to the blood vessel. The second front end section is configured to be able to deform when being pressed along the first direction, so that the second front end section can buffer the pressure from the first direction, thereby being able to reduce the damage to the blood vessel.

[0007] In some embodiments, the front end part further comprises a third front end section, the third front end section is parallel to the main body part, one end of the third front end section is spaced apart from the main body part, the other end of the third front end section is connected to the fourth end part, and the third front end section is configured to be able to deform when being pressed along the first direction.

[0008] In some embodiments, the angiography catheter further comprises a front end tail part, one end of the front end tail part is located between the fourth end part and the main body part, and the other end of the front end tail part is connected to the fourth end part.

[0009] In some embodiments, the front end tail portion comprises a first tail segment, the first tail segment has a fifth end and a sixth end, the fifth end is connected with the fourth end, the sixth end is spaced from the main body portion, the first tail segment is closer to the main body portion in the first direction, and is farther away from the second end portion in the second direction and on the side of the second end portion closer to the main body portion in the extension direction away from the fifth end.

[0010] In some embodiments, the front end tail portion comprises a second tail segment and a third tail segment, the second tail segment is parallel to the main body portion, one end of the second tail segment is connected with the fourth end, the second tail segment is configured to deform when being pressed in the second direction, the third tail segment has a seventh end and an eighth end, the seventh end is connected with the other end of the second tail segment, the eighth end is spaced from the main body portion, the third tail segment is closer to the main body portion in the first direction, and is farther away from the second end portion in the second direction and on the side of the second end portion closer to the main body portion in the extension direction away from the seventh end.

[0011] In some embodiments, the front end tail portion is provided with a plurality of first side holes, each of the first side holes is arranged through the side wall of the front end tail portion, and the plurality of first side holes are arranged in the circumferential direction of the front end tail portion and in the extension direction of the front end tail portion.

[0012] In some embodiments, the second front end segment is provided with a plurality of second side holes, each of the second side holes is arranged through the side wall of the second front end segment, and the plurality of second side holes are arranged in the circumferential direction of the second front end segment and in the extension direction of the second front end segment.

[0013] In some embodiments, the first front end segment is provided with a plurality of third side holes, each of the third side holes is arranged through the side wall of the first front end segment, and the plurality of third side holes are arranged in the circumferential direction of the first front end segment and in the extension direction of the first front end segment.

[0014] In some embodiments, in the extension direction away from the third end portion, the distance between two adjacent second side holes increases in sequence; in the extension direction away from the first end portion, the distance between two adjacent third side holes increases in sequence.

[0015] In some embodiments, the first front end segment and the second front end segment are both arc-shaped, and the first front end segment and the second front end segment are smoothly connected. BRIEF DESCRIPTION OF DRAWINGS

[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein:

[0017] Figure 1 This is a schematic diagram of angiography catheters according to some embodiments of this application;

[0018] Figure 2 This is a schematic diagram of the angiography catheter entering the left subclavian artery according to some embodiments of this application;

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a schematic diagram of angiography catheters according to other embodiments of this application;

[0021] Figure 5 This is a schematic diagram of an angiography catheter for a further embodiment of this application;

[0022] Figure 6 This is a schematic diagram of an angiography catheter for a further embodiment of this application;

[0023] Figure 7 This is a schematic diagram of an angiography catheter for a further embodiment of this application;

[0024] Figure 8 This is a schematic diagram of an angiography catheter for a further embodiment of this application;

[0025] Figure 9 This is a schematic diagram of a pig tail catheter in related technologies.

[0026] The labels in the attached diagram are as follows:

[0027] 100. Angiography catheter; 200. Aorta; 300. Left subclavian artery;

[0028] 1. Main body;

[0029] 2. Front end portion; 21. First front end segment; 211. First end portion; 212. Second end portion; 213. Third side hole; 22. Second front end segment; 221. Third end portion; 222. Fourth end portion; 223. Second side hole; 23. Third front end segment;

[0030] 3. Front end; 31. First tail section; 311. Fifth end; 312. Sixth end; 32. Second tail section; 33. Third tail section; 331. Seventh end; 332. Eighth end; 34. First side hole;

[0031] 400. Pig tail duct;

[0032] 4. Pig's tail;

[0033] 5. Pipe body;

[0034] a) First direction; b) Second direction. Detailed Implementation

[0035] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.

[0036] like Figure 9 As shown, the pig tail catheter 400 includes a tube body 5 and a pig tail portion 4 located at the front end of the tube body 5 and connected to the tube body 5.

[0037] Because the radial dimension of the pig's tail 4 is too large, the inner diameter of the left and right subclavian arteries is small, making it difficult for existing catheters to reach the distal ends of the left and right subclavian arteries.

[0038] To at least address the problem that existing catheters have difficulty reaching the distal ends of the left and right subclavian arteries, embodiments of this application propose an angiography catheter 100 capable of reaching the distal ends of the left and right subclavian arteries.

[0039] The following is combined Figures 1 to 8 The angiography catheter 100 according to an embodiment of this application is described.

[0040] Combination Figures 1 to 8 As shown, the contrast catheter 100 of this application embodiment includes a main body 1 and a front end portion 2. The front end portion 2 includes a first front end segment 21 and a second front end segment 22 located on the same side of the main body 1 in a first direction a. The first front end segment 21 has a first end portion 211 and a second end portion 212, and the second front end segment 22 has a third end portion 221 and a fourth end portion 222. The first end portion 211 is connected to the main body 1, the second end portion 212 is connected to the third end portion 221, and the fourth end portion 222 is spaced apart from the main body 1 in the first direction a.

[0041] In the direction of extension of the first front end segment 21 away from the first end 211, the first front end segment 21 is away from the main body 1 in both the first direction a and the second direction b. In the direction of extension of the second front end segment 22 away from the third end 221, the second front end segment 22 is away from the main body 1 in the first direction a and away from the second end 212 in the second direction b, and is located on the side of the second end 212 close to the main body 1. Both the first front end segment 21 and the second front end segment 22 are configured to deform when compressed along the second direction b. The second front end segment 22 is also configured to deform when compressed along the first direction a. The first direction a and the second direction b are perpendicular.

[0042] In some embodiments of this application, for ease of explanation, a first direction a and a second direction b are defined, and the first direction a and the second direction b are perpendicular to each other. For ease of explanation, as... Figures 1 to 8 As shown by the arrows, the direction of arrow a is the first direction a, and the direction of arrow b is the second direction b. As an example, when the angiography catheter 100 is naturally and normally positioned, the length direction of the main body 1 is the second direction b.

[0043] It should be noted that the compression along the second direction b can be generated by a compression force parallel to the second direction b, or by a compression force intersecting the second direction b and having a component force along the second direction b. Similarly, the compression along the first direction a can be generated by a compression force parallel to the first direction a, or by a compression force intersecting the first direction a and having a component force along the first direction a.

[0044] Combination Figure 2 and Figure 3 As shown, the second front end segment 22 is configured to deform when compressed along the first direction a. Therefore, when the second front end segment 22 enters the subclavian artery and is compressed along the first direction a, it can reduce the size of the front end portion 2 in the first direction a through deformation, making it easier for the angiography catheter 100 to extend to the distal end of the subclavian artery. Since the fourth end portion 222 is spaced apart from the main body portion 1 in the first direction a, the second front end segment 22 has a larger deformation space, further facilitating the extension of the angiography catheter 100 to the distal end of the subclavian artery.

[0045] In addition, the second front end segment 22 is configured to deform when compressed along the first direction a, so that the second front end segment 22 can buffer the compression in the first direction a, thereby reducing damage to blood vessels.

[0046] Combination Figure 2 and Figure 3As shown, both the first front end segment 21 and the second front end segment 22 are configured to deform when compressed along the second direction b. When the first front end segment 21 and the second front end segment 22 enter the subclavian artery and are compressed from the second direction b, the first front end segment 21 and the second front end segment 22 deform, thereby adjusting the position and shape of the second front end segment 22, making it easier for the second front end segment 22 to deform in the first direction a, making it easier for the angiography catheter 100 to extend to the distal end of the subclavian artery. The fact that both the first front end segment 21 and the second front end segment 22 are configured to deform when compressed along the second direction b also reduces the size of the front end portion 2 extending out of the main body portion 1 in the second direction b, thereby facilitating the extension of the angiography catheter 100 to the distal end of the subclavian artery.

[0047] In addition, both the first front end segment 21 and the second front end segment 22 are configured to deform when compressed along the second direction b, which enables the first front end segment 21 and the second front end segment 22 to buffer the compression from the second direction b, thereby reducing damage to blood vessels.

[0048] In the direction of extension of the first front end segment 21 away from the first end segment 211, the first front end segment 21 is away from the main body 1 in both the first direction a and the second direction b. In the direction of extension of the second front end segment 22 away from the third end segment 221, the second front end segment 22 is away from the main body 1 in the first direction a and away from the second end segment 212 in the second direction b. This can increase the contact area between the front end segment 2 and the blood vessel, thereby reducing the damage caused by the contact between the front end segment 2 and the blood vessel.

[0049] like Figure 4 As shown, in some alternative embodiments, the fourth end portion 222 is located on the same side of the main body 1 as the first end portion 211 in the second direction b. This allows for a reduction in the size of the anterior end portion 2 in the first direction a, making it easier for the angiography catheter 100 to extend distally into the subclavian artery.

[0050] like Figure 6 As shown, in some embodiments, the front end portion 2 further includes a third front end segment 23, which is parallel to the main body portion 1. One end of the third front end segment 23 is spaced apart from the main body portion 1, and the other end of the third front end segment 23 is connected to the fourth end portion 222. The third front end segment 23 is configured to deform when compressed along the first direction a.

[0051] By making the third front end segment 23 parallel to the main body 1, the probability of the front end segment 2 being blocked by the blood vessel wall can be reduced, thereby allowing the front end segment 2 to discharge the contrast agent more smoothly.

[0052] like Figure 6As shown, furthermore, the other end of the third front segment 23 is smoothly connected to the fourth end segment 222. This reduces the risk of damage to blood vessels at the connection between the third front segment 23 and the second front segment 22.

[0053] Combination Figure 5 and Figure 7 As shown, in some embodiments, the angiography catheter 100 further includes a front tail portion 3, one end of which is located between the fourth end portion 222 and the main body portion 1, and the other end of which is connected to the fourth end portion 222.

[0054] One end of the anterior tail 3 is located between the fourth end 222 and the main body 1, which can further reduce the probability of the anterior end 2 being blocked by the blood vessel wall, thereby enabling the anterior end 2 to discharge the contrast agent more smoothly.

[0055] By positioning one end of the front tail portion 3 between the fourth end portion 222 and the main body portion 1, the probability of the front tail portion 3 contacting the inner wall of the blood vessel can be reduced, thereby further reducing damage to the blood vessel.

[0056] like Figure 5 As shown, in some embodiments, the front end tail portion 3 includes a first tail segment 31, the first tail segment 31 having a fifth end portion 311 and a sixth end portion 312, the fifth end portion 311 being connected to the fourth end portion 222, the sixth end portion 312 being spaced apart from the main body portion 1, the first tail segment 31 extending away from the fifth end portion 311 in the extension direction, the first tail segment 31 being close to the main body portion 1 in the first direction a, the first tail segment 31 being away from the second end portion 212 in the second direction b, and located on the side of the second end portion 212 close to the main body portion 1.

[0057] In the direction of extension of the first tail segment 31 away from the fifth end segment 311, the first tail segment 31 is close to the main body 1 in the first direction a, and away from the second end segment 212 in the second direction b, and is located on the side of the second end segment 212 close to the main body 1, so that the sixth end segment 312 is located between the fourth end segment 222 and the main body 1. This can further reduce the probability of the anterior end segment 2 being blocked by the blood vessel wall, thereby allowing the anterior end segment 2 to expel the contrast agent more smoothly, and can also reduce the probability of the sixth end segment 312 contacting the inner wall of the blood vessel, thereby further reducing damage to the blood vessel.

[0058] like Figure 5 As shown, the fifth end 311 and the fourth end 222 are smoothly connected. This reduces the risk of damage to blood vessels at the connection between the first tail segment 31 and the second front segment 22.

[0059] like Figure 7As shown, in some embodiments, the front tail portion 3 includes a second tail segment 32 and a third tail segment 33. The second tail segment 32 is parallel to the main body portion 1, one end of the second tail segment 32 is connected to the fourth end portion 222, and the second tail segment 32 is configured to deform when compressed along the second direction b.

[0060] The third tail segment 33 has a seventh end 331 and an eighth end 332. The seventh end 331 is connected to the other end of the second tail segment 32, and the eighth end 332 is spaced apart from the main body 1. In the extension direction away from the seventh end 331, the third tail segment 33 is close to the main body 1 in the first direction a, and in the second direction b, the third tail segment 33 is away from the second end 212 and is located on the side of the second end 212 that is close to the main body 1.

[0061] In the direction of extension of the third tail segment 33 away from the seventh end segment 331, the third tail segment 33 is close to the main body 1 in the first direction a, and away from the second end segment 212 in the second direction b, and is located on the side of the second end segment 212 close to the main body 1, so that the eighth end segment 332 is located between the fourth end segment 222 and the main body 1. This can further reduce the probability of the anterior end segment 2 being blocked by the blood vessel wall, thereby allowing the anterior end segment 2 to expel the contrast agent more smoothly, and can also reduce the probability of the sixth end segment 312 contacting the inner wall of the blood vessel, thereby further reducing damage to the blood vessel.

[0062] like Figure 7 As shown, the second tail segment 32 and the third tail segment 33 are smoothly connected, and the second tail segment 32 is smoothly connected to the second front segment 22. This reduces the damage to blood vessels at the connection between the second tail segment 32 and the third tail segment 33, and also reduces the damage to blood vessels at the connection between the second tail segment 32 and the second front segment 22.

[0063] like Figure 7 As shown, in some embodiments, the front end tail 3 is provided with a plurality of first side holes 34, each of which is disposed through the side wall of the front end tail 3. The plurality of first side holes 34 are spaced apart in the circumferential direction and the extension direction of the front end tail 3.

[0064] By setting the first side hole 34, the contrast agent can be discharged more evenly in the blood vessel, thereby allowing the blood vessel to fill with contrast agent more quickly.

[0065] By setting the first side hole 34, the pressure generated by the contrast agent in the front end 3 can be reduced, thereby allowing the contrast agent to be discharged from the contrast catheter 100 more smoothly.

[0066] Combination Figure 7 and Figure 8As shown, in some embodiments, the second front end segment 22 is provided with a plurality of second side holes 223, each second side hole 223 is disposed through the side wall of the second front end segment 22, and the plurality of second side holes 223 are spaced apart in the circumferential direction of the second front end segment 22 and the extension direction of the second front end segment 22.

[0067] By setting the second side hole 223, the contrast agent can be discharged more evenly in the blood vessel, thereby allowing the blood vessel to fill with contrast agent more quickly.

[0068] By providing a second side hole 223, the pressure generated by the contrast agent in the front end 2 can be reduced, thereby allowing the contrast agent to be discharged more smoothly from the contrast catheter 100.

[0069] Combination Figure 7 and Figure 8 As shown, in some embodiments, the first front end segment 21 is provided with a plurality of third side holes 213, each third side hole 213 is disposed through the side wall of the first front end segment 21, and the plurality of third side holes 213 are spaced apart in the circumferential direction and the extension direction of the first front end segment 21.

[0070] By setting the third side hole 213, the contrast agent can be discharged more evenly in the blood vessel, thereby allowing the blood vessel to fill with contrast agent more quickly.

[0071] By providing a third side hole 213, the pressure generated by the contrast agent in the front end 2 can be reduced, thereby allowing the contrast agent to be discharged more smoothly from the contrast catheter 100.

[0072] In some embodiments, in the direction of extension of the second front end segment 22 away from the third end segment 221, the distance between two adjacent second side holes 223 increases sequentially. In the direction of extension of the first front end segment 21 away from the first end segment 211, the distance between two adjacent third side holes 213 increases sequentially. This minimizes the number of second side holes 223 and third side holes 213, thereby reducing manufacturing complexity.

[0073] like Figure 7 As shown, specifically, there are a total of 6 side holes: the first side hole 34, the second side hole 223, and the third side hole 213.

[0074] like Figure 1 As shown, in some embodiments, both the first front end segment 21 and the second front end segment 22 are arc-shaped, and the first front end segment 21 and the second front end segment 22 are smoothly connected. This can reduce the damage to blood vessels at the connection between the first front end segment 21 and the second front end segment 22.

[0075] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0076] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0077] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure rotates, then an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0078] In the description of the application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", "height direction", "first direction", "second direction", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0079] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0080] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A contrast catheter, characterized in that, include: Main body; The front end portion includes a first front end segment and a second front end segment located on the same side of the main body portion in a first direction. The first front end segment has a first end and a second end, and the second front end segment has a third end and a fourth end. The first end is connected to the main body portion, the second end is connected to the third end, and the fourth end is spaced apart from the main body portion in the first direction. In the extension direction of the first front end segment away from the first end, the first front end segment is away from the main body in both the first and second directions. In the extension direction of the second front end segment away from the third end, the second front end segment is away from the main body in the first direction. The second front end segment is away from the second end in the second direction and is located on the side of the second end segment close to the main body. Both the first and second front end segments are configured to deform when compressed along the second direction. The second front end segment is also configured to deform when compressed along the first direction. The first and second directions are perpendicular.

2. The angiography catheter according to claim 1, characterized in that, The front end portion further includes a third front end segment, which is parallel to the main body portion. One end of the third front end segment is spaced apart from the main body portion, and the other end of the third front end segment is connected to the fourth end portion. The third front end segment is configured to deform when subjected to compression along the first direction.

3. The angiography catheter according to claim 1, characterized in that, The angiography catheter also includes a front tail portion, one end of which is located between the fourth end portion and the main body portion, and the other end of which is connected to the fourth end portion.

4. The angiography catheter according to claim 3, characterized in that, The front end includes a first tail segment, which has a fifth end and a sixth end. The fifth end is connected to the fourth end, and the sixth end is spaced apart from the main body. In the direction of extension of the first tail segment away from the fifth end, the first tail segment is close to the main body in the first direction, and the first tail segment is away from the second end in the second direction and is located on the side of the second end close to the main body.

5. The angiography catheter according to claim 3, characterized in that, The front and rear portions include: The second tail section is parallel to the main body, one end of the second tail section is connected to the fourth end section, and the second tail section is configured to deform when compressed along the second direction. The third tail segment has a seventh end and an eighth end, the seventh end being connected to the other end of the second tail segment, the eighth end being spaced apart from the main body, the third tail segment extending away from the seventh end in the first direction, the third tail segment being close to the main body in the second direction, the third tail segment being away from the second end in the second direction, and located on the side of the second end close to the main body.

6. The angiography catheter according to claim 3, characterized in that, The front end is provided with a plurality of first side holes, each of which penetrates the side wall of the front end. The plurality of first side holes are spaced apart in both the circumferential direction and the extension direction of the front end.

7. The angiography catheter according to any one of claims 1 to 6, characterized in that, The second front end segment is provided with a plurality of second side holes, each of which penetrates the side wall of the second front end segment. The plurality of second side holes are spaced apart in both the circumferential direction and the extension direction of the second front end segment.

8. The angiography catheter according to claim 7, characterized in that, The first front end segment is provided with a plurality of third side holes, each of which is disposed through the side wall of the first front end segment. The plurality of third side holes are spaced apart in both the circumferential direction and the extension direction of the first front end segment.

9. The angiography catheter according to claim 8, characterized in that, In the direction of extension of the second front end segment away from the third end, the distance between two adjacent second side holes increases sequentially; In the direction of extension of the first front end segment away from the first end, the distance between two adjacent third side holes increases sequentially.

10. The angiography catheter according to any one of claims 1 to 6, characterized in that, Both the first front end segment and the second front end segment are arc-shaped, and the first front end segment and the second front end segment are smoothly connected.

Images