Catheter for vascular intervention

Abstract

The invention provides a catheter for vascular intervention, and belongs to the technical field of interventional medical instruments. The catheter comprises a conveying pipe body, a first pipe cavity, a second pipe cavity and a supporting component. The delivery tube body at least comprises a protective layer, a supporting layer and a lining layer which are sequentially arranged from outside to inside, and the delivery tube body is used for establishing a passage along a blood vessel; the first pipe cavity extends in the axial direction of the conveying pipe body and is used for conveying treatment instruments. The second pipe cavity and the first pipe cavity are arranged in parallel; the supporting component is arranged in the second tube cavity in a penetrating manner and is in sliding fit with the second tube cavity, and the hardness of the supporting component is lower than that of the treatment instrument; during working, after the conveying pipe body enters a blood vessel to establish a passage, the supporting component enters the conveying pipe body along the second pipe cavity, so that the supporting performance of the conveying pipe body is improved; the catheter is used for solving the technical problems that an existing catheter is inconvenient in surgical operation, low in efficiency and low in safety performance due to contradictory requirements of turning performance and supporting performance.

Description

Technical Field

[0001] The present invention belongs to the technical field of interventional medical devices, and in particular relates to a catheter for vascular intervention. Background Art

[0002] Vascular intervention surgery has become the main treatment for vascular diseases due to its low trauma. In clinical surgery, doctors use catheters to establish a pathway from the body to the vascular lesion to facilitate the entry of therapeutic devices. Surgery often encounters situations with large bending angles. When establishing the pathway, the catheter needs to be relatively soft and have good bending performance. When the therapeutic device passes through the catheter, the catheter needs to have a certain degree of rigidity to support the passage of the therapeutic device.

[0003] For example, when using radial artery intervention to treat cerebrovascular disease, please refer to Figure 1 After entering the aortic arch 2, the catheter 1 needs to bend upward at a large angle to enter the cerebral blood vessels. Therefore, the catheter 1 needs to have very good flexibility and bend tracking performance at the aortic arch 2. For this reason, the catheter 1 needs to be designed to be very soft, but the soft tube body will cause the problem of insufficient support at the aortic arch 2. When a therapeutic device (such as a balloon, stent or other therapeutic device with poor curvature) is delivered to the cerebral blood vessels through the catheter 1, a downward reaction force will be generated on the inner wall of the catheter 1 lumen, causing the catheter 1 to fall back into the aorta.

[0004] The traditional solution requires the operator to push the device back and forth at the aortic arch multiple times to allow the device to pass smoothly. This requires a high level of experience and skills from the operator, is cumbersome and inefficient to operate, and is prone to complications.

[0005] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0006] The purpose of the present invention is to provide a catheter for vascular intervention to solve the technical problems of the existing catheters that lead to inconvenient surgical operation, low efficiency and low safety performance due to the conflicting requirements between bending and supporting properties.

[0007] In order to achieve the above-mentioned purpose, the catheter for vascular intervention of the present invention provides the following technical solutions:

[0008] A catheter for vascular intervention, comprising:

[0009] A delivery tube body, the delivery tube body at least comprising a protective layer, a support layer and an inner lining layer arranged in sequence from the outside to the inside, and the delivery tube body is used to establish a passage along the blood vessel;

[0010] A first lumen, the first lumen extending axially along the delivery tube body and used for delivering a therapeutic device;

[0011] a second lumen, the second lumen being arranged in parallel with the first lumen, and the length of the second lumen being no greater than the length of the first lumen;

[0012] A support component, the support component is used to pass through the second lumen and slide with the second lumen, and the hardness of the support component is lower than the hardness of the treatment device;

[0013] During operation, after the delivery tube body enters the blood vessel to establish a passage, the support component enters the delivery tube body along the second lumen to improve the support of the delivery tube body.

[0014] As a further optimized technical solution, the hardness of the supporting component gradually decreases from the proximal end to the distal end.

[0015] As a further optimized technical solution, the cross section of the second lumen is circular, the shape of the cross section of the supporting component is similar to the shape of the cross section of the second lumen, and the diameter gradually decreases from the proximal end to the distal end.

[0016] As a further optimized technical solution, the cross section of the second lumen is circular, the shape of the cross section of the support component is similar to the shape of the cross section of the second lumen, and the support component has a plurality of equal-diameter sections whose diameters decrease successively from the proximal end to the distal end.

[0017] As a further optimized technical solution, the equal-diameter section at the proximal end of the support component is a tubular structure, the equal-diameter section at the distal end of the support component is inserted into the equal-diameter section at the proximal end and slidably cooperates with the equal-diameter section at the proximal end, and a driving component is provided at the proximal end of the equal-diameter section at the distal end of the support component. The driving component extends along the equal-diameter section at the proximal end and extends from the proximal end of the equal-diameter section at the proximal end, and is used to push and pull the equal-diameter section at the distal end axially.

[0018] As a further optimized technical solution, the driving component is a push wire, and the diameter of the push wire is not greater than 1 / 10 of the diameter of the equal-diameter section at the proximal end.

[0019] As a further optimized technical solution, the second lumen is arranged outside the delivery tube body, and the cross-section of the first lumen is circular.

[0020] As a further optimized technical solution, the second tube cavity is arranged inside the conveying tube body, and the first tube cavity and the second tube cavity together constitute the inner cavity of the lining layer.

[0021] As a further optimized technical solution, the second tube cavity is arranged on the protective layer or the lining layer, the cross-section of the second tube cavity is arc-shaped, the cross-section of the supporting component is similar to the cross-section of the second tube cavity, and the section at the distal end of the supporting component is arranged with grooves at intervals along the axial direction, the grooves are arranged on both sides of the supporting component, and the grooves on both sides are staggered.

[0022] As a further optimized technical solution, the tube cavity of the conveying tube body is provided with an axially arranged partition, one side of the partition and the inner wall of the lining layer opposite to it constitute the first tube cavity, and the other side of the partition and the inner wall of the lining layer corresponding to it constitute the second tube cavity, and the partition is a straight line or a curve shape; the cross-section of the support component is similar to the cross-section of the second tube cavity, and the section at the distal end of the support component is arranged with grooves at intervals along the axial direction, and the grooves are arranged on both sides of the support component 160, and the grooves on both sides are staggered.

[0023] Beneficial effects: The catheter of the present invention has a softer and more compliant delivery tube body, which is convenient for entering the blood vessel and establishing a pathway along the blood vessel. After the pathway is established, the support component is inserted into the second lumen. The hardness of the support component is relatively softer than the therapeutic device. Therefore, during the pushing process along the second lumen, no large reverse force will be generated on the delivery tube body, making it easier to push into the second lumen. After the support component is pushed into the second lumen, the supporting performance of the delivery tube body is increased, and then the therapeutic device is pushed to the lesion position through the first lumen. At this time, because the support component increases the support of the delivery tube body, the pushing process is smoother, which effectively improves the operating efficiency, and there is no need to repeatedly push the catheter and the device at the bend of the blood vessel, which increases the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0025] Figure 1 This is a schematic diagram of the structure where the catheter passes through the aortic arch;

[0026] Figure 2 is a schematic diagram of the cross-sectional structure of a catheter according to Embodiment 1 of the present invention;

[0027] Figure 3 This is a schematic diagram of the axial structure of the support component of Example 1 of the present invention;

[0028] Figure 4 This is a schematic diagram of the axial structure of the support component of Example 2 of the present invention;

[0029] Figure 5 This is a schematic axial cross-sectional view of a support component according to Embodiment 3 of the present invention;

[0030] Figure 6 is a schematic diagram of the cross-sectional structure of a catheter according to Embodiment 4 of the present invention;

[0031] Figure 7is a schematic diagram of the cross-sectional structure of a catheter according to Embodiment 5 of the present invention;

[0032] Figure 8 for Figure 7 A right side view of the supporting component in the state;

[0033] Fig. 9 This is a schematic diagram of the axial structure of the support component of Example 6 of the present invention;

[0034] Fig.10 is a schematic diagram of the cross-sectional structure of a catheter according to Embodiment 7 of the present invention;

[0035] Fig.11 This is a schematic diagram of the cross-sectional structure of the catheter of Example 8 of the present invention.

[0036] In the figure: 1, catheter; 2, aortic arch; 100, delivery tube body; 110, protective layer; 120, support layer; 130, lining layer; 140, first lumen; 150, second lumen; 160, support component; 170, driving component; 180, partition;

[0037] in, Figure 4 , Figure 5 160a and 160b in the figure represent the equal diameter section at the proximal end and the equal diameter section at the distal end, respectively; Figure 8 161a in the figure represents the groove in Example 5; Fig. 9 161b in FIG. 1 represents the groove in Example 6. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0039] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. In addition, the term "proximal end" uniformly refers to the end close to the operator, and the "distal end" refers to the end away from the operator.

[0040] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0041] The present invention provides a catheter for vascular intervention, which has a delivery tube body. The delivery tube body has two parallel lumens, wherein the first lumen is used to deliver therapeutic equipment, and the second lumen is used to place a supporting component. During operation, a passage is first established in the blood vessel through the relatively soft delivery tube body, and then the supporting component is placed in the second lumen to increase the supporting performance of the delivery tube body, thereby facilitating the delivery of the therapeutic equipment into the first lumen.

[0042] Example 1

[0043] like Figure 2 As shown, the catheter for vascular intervention includes a delivery tube body 100 , a first lumen 140 , a second lumen 150 and a supporting component 160 .

[0044] The delivery tube body 100 is a hollow tube body, which includes at least a protective layer 110, a support layer 120 and an inner lining layer 130 which are fixedly connected in sequence from the outside to the inside. The delivery tube body 100 is used to establish a passage along the blood vessel. Among them, the protective layer 110 is made of polymer materials such as polyamide PA and / or polyurethane TPU. The support layer 120 is a metal reinforcement layer, which is usually made of wire weaving, spring winding or a combination of the two to prevent the catheter from being folded at the bend of the blood vessel. The inner lining layer 130 is made of PTFE material, which has a low friction coefficient, and is convenient for the corresponding vascular treatment device to pass through the inside.

[0045] The first lumen 140 is arranged in the inner lining layer 130 and extends axially along the conveying tube body 100. The second lumen 150 is arranged in parallel with the first lumen 140 and has the same length as the first lumen 140. The first lumen 140 is used to convey therapeutic devices, and the second lumen 150 is used to install the support component 160. In this embodiment, the distal end of the second lumen 150 is closed, thereby effectively preventing the distal end of the support component 160 from puncturing the blood vessel when conveying the support component 160.

[0046] The support component 160 is slidably matched with the second lumen 150, and the cross section of the support component 160 is similar to the cross section of the second lumen 150. It should be noted that "similar" means the same shape, but not necessarily the same size. The hardness of the support component 160 is lower than the hardness of the treatment device, so that when the support component 160 is pushed into the second lumen 150, the support component 160 can pass through the curved position of the delivery tube body 100 more smoothly than the treatment device, so as to achieve the purpose of the invention of increasing the support of the delivery tube body 100.

[0047] In this embodiment, the second lumen 150 is disposed outside the delivery tube body 100, specifically on the protective layer 110, and the cross-sections of the first lumen 140 and the second lumen 150 are both circular. The cross-section of the first lumen 140 is set to be circular, which makes it easier to deliver therapeutic devices (including but not limited to balloons, microcatheters, stents and other devices for treating lesions or catheters for transmitting therapeutic devices) along the first lumen 140.

[0048] In order to facilitate the pushing of the support component 160, the hardness of the support component 160 gradually decreases from the proximal end to the distal end. With this arrangement, the harder part at the proximal end facilitates the transmission of the pushing force inward, and the softer part at the distal end facilitates the forward movement of the curved blood vessel. The overall hardness of the support component 160 can be changed by processing different sections of the support component 160 with different materials, and then fixing and connecting multiple sections with different hardnesses in sequence. In this embodiment, the overall hardness of the support component 160 is adjusted by changing the shape of the support component 160 made of the same material, that is, the support component 160 is processed into a conical shape with a diameter that gradually decreases from the proximal end to the distal end. Specifically, Figure 3 shown.

[0049] During operation, the delivery tube body 100 is first used to enter the blood vessel to establish a passage, and then the support component 160 is inserted into the delivery tube body 100 along the second lumen 150. The support component 160 does not need to be completely pushed to the distal end of the delivery tube body 100, but at least needs to be pushed beyond the position where the blood vessel is more curved, so as to improve the support of the delivery tube body 100 at the curved position of the blood vessel, thereby facilitating the delivery of therapeutic devices into the first lumen 140.

[0050] Example 2

[0051] like Figure 4 As shown, this embodiment provides a support component 160 with a different structure. Except for the structure of the support component 160, the other structures of this embodiment are the same as those of Example 1, and will not be repeated here. In this embodiment, the cross section of the second tubular cavity 150 is still circular, and the shape of the cross section of the support component 160 is similar to the shape of the cross section of the second tubular cavity 150, and the support component 160 has two equal-diameter sections 160a at the proximal end and the equal-diameter section 160b at the distal end whose diameters decrease from the proximal end to the distal end, which are integrally fixedly connected. In this way, the equal-diameter section 160a at the proximal end and the equal-diameter section 160b at the distal end are made of the same material, but due to different diameters, the hardness of the equal-diameter section 160b at the distal end will be lower than that of the equal-diameter section 160a at the proximal end.

[0052] Example 3

[0053] like Figure 5As shown, this embodiment provides a support component 160 with different connection relationships of equal-diameter sections. Except for the connection relationship of the equal-diameter sections, the other structures of this embodiment are the same as those of Example 2, and are not repeated here. In this embodiment, the equal-diameter section 160a at the proximal end of the support component 160 is a tubular structure, and the equal-diameter section 160b at the distal end of the support component 160 is inserted into the equal-diameter section 160a at the proximal end and slidably cooperates with the equal-diameter section 160a at the proximal end, and a driving component 170 is provided at the proximal end of the equal-diameter section 160b at the distal end of the support component 160. The driving component 170 extends along the equal-diameter section 160b at the proximal end and extends from the proximal end of the equal-diameter section 160b at the proximal end, and is used to push and pull the equal-diameter section 160b at the distal end axially.

[0054] Specifically, the distal equal-diameter section 160b can be a hollow tubular structure or a solid rod-shaped structure, and its hardness is lower than that of the proximal equal-diameter section 160a. When in use, the distal inner wall of the proximal equal-diameter section 160a and the proximal outer wall of the distal equal-diameter section 160b are clamped together and pushed into the second tubular cavity 150. When the distal end of the proximal equal-diameter section 160a exceeds the bending position of the blood vessel, the distal equal-diameter section 160b is pulled proximally so that the distal equal-diameter section 160b is disengaged from the proximal equal-diameter section 160a and enters the interior of the proximal equal-diameter section 160a. In this way, the two equal-diameter sections overlap, so that the hardness of the overlapping section position is further enhanced, which can further ensure the support of the delivery tube body 100 at the bending position of the blood vessel.

[0055] In this embodiment, in order not to affect the overall hardness of the supporting component 160, the driving component 170 is a push wire, and the diameter of the push wire is not greater than 1 / 10 of the diameter of the equal-diameter section 160b at the proximal end.

[0056] Example 4

[0057] like Figure 6 As shown, this embodiment provides a second lumen 150 with a different arrangement. Except for the arrangement of the second lumen 150, the other structures of this embodiment are the same as those of embodiment 1, and are not repeated here. In this embodiment, the second lumen 150 is arranged inside the lining layer 130. At this time, the cross section of the first lumen 140 is no longer circular, and the first lumen 140 and the second lumen 150 together form the inner cavity of the lining layer 130. In this case, since there is no redundant structure on the outer wall of the delivery tube body 100, it is smoother and more convenient to push into the blood vessel.

[0058] Example 5

[0059] like Figure 7As shown, this embodiment provides a second lumen 150 with different cross-sectional shapes. Except for the arrangement shape of the second lumen 150, the other structures of this embodiment are the same as those of Embodiment 1, and are not repeated here. In this embodiment, the second lumen 150 is arranged on the protective layer 110 or the lining layer 130. The figure shows that the second lumen 150 is arranged on the lining layer 130. The second lumen 150 can also be arranged on the protective layer 110. When it is arranged on the protective layer, a guide layer with a smaller friction coefficient needs to be arranged on the inner wall of the second lumen 150. The friction coefficient of the guide layer is smaller than the friction coefficient of the lining layer, so as to facilitate the support component 160 to be pushed more smoothly at the curved position of the blood vessel.

[0060] The cross section of the second lumen 150 is in the shape of an arc, and the arc angle of the arc is not less than 180° and not more than 360°. The cross section of the supporting component 160 is similar to the cross section of the second lumen 150 .

[0061] In this embodiment, in order to properly adjust the hardness of the support component 160, a groove structure can be provided at the distal end of the support component 160. The groove structure can be a continuous spiral shape or other shapes. Specifically, in this embodiment, Figure 8 As shown in the figure, the support component 160 is shown in Figure 7 In the right view in FIG. 1 , the distal section of the support member 160 is provided with grooves 161a spaced apart along the axial direction, and the grooves 161a have a set angle with the radial direction of the support member 160, so that the grooves 161a are arranged tilted in the state shown in the figure, and the grooves 161a are arranged on both sides of the support member 160, and the grooves 161a on both sides are arranged staggered. It should be noted that the grooves 161a shown in the figure are opened to the position of the axis, and in other embodiments, the edge of the groove 161a can maintain a set distance from the axis.

[0062] Example 6

[0063] like Fig. 9 As shown, this embodiment provides a groove 161b with a different arrangement. Except for the arrangement of the groove 161b, the other structures of this embodiment are the same as those of Example 5, and are not repeated here. In this embodiment, the groove 161b is perpendicular to the axial direction of the support member 160, so that the groove 161b is vertically arranged in the state shown in the figure, and the groove 161b is arranged on both sides of the support member 160, and the grooves 161b on both sides are staggered. It should be noted that the groove 161b in the figure is opened to the position of the axis. In other embodiments, the edge of the groove 161b can maintain a set distance from the axis.

[0064] Example 7

[0065] like Fig.10As shown, this embodiment provides a different processing method for the second lumen 150. Except for the processing method of the second lumen 150, the other structures of this embodiment are the same as those of Example 5, and will not be repeated here. In this embodiment, the lumen of the delivery tube body 100 has an axially arranged partition 180, one side of the partition 180 and the inner wall of the lining layer 130 opposite to it constitute the first lumen 140, and the other side of the partition 180 and the inner wall of the lining layer 130 corresponding to it constitute the second lumen 150, and the partition 180 is a straight line shape; the cross section of the support component 160 is similar to the cross section of the second lumen 150. At this time, the support component 160 can be processed from a D-shaped pipe.

[0066] In this embodiment, in order to properly adjust the hardness of the support component 160, the support component 160 can also be adjusted by setting a groove structure. In the specific adjustment method, the groove structure can be a spirally extended structure shape, and the hardness of the support component 160 can be properly adjusted according to the pitch. For example, if the pitch is increased, the hardness of the support component 160 decreases, and vice versa. In other embodiments, the structure of the groove can also be the same as that of embodiment 5 or embodiment 6.

[0067] Example 8

[0068] like Fig.11 As shown, this embodiment provides a partition 180 of different shapes. Except for the shape of the partition 180, the other structures of this embodiment are the same as those of embodiment 7, and will not be repeated here. In this embodiment, the partition 180 is in a shape of or a curve, preferably an arc shape.

[0069] Example 9

[0070] This embodiment provides a second lumen 150 with a different structure. Except for the structure of the second lumen 150, the other structures of this embodiment are the same as those of embodiment 1, and will not be repeated here. In this embodiment, the distal end of the second lumen 150 is open, and a soft guide wire is selected for the support component 160. Since the distal end of the guide wire is soft, it will not damage the blood vessel, and the guide wire penetrates deep into the blood vessel, which can play a better role in anchoring the catheter; in addition, since the support component 160 is a structure that gradually hardens from the distal end to the proximal end, the relative position of the support component 160 and the conveying tube body 100 in the axial direction can be adjusted to adjust the strength of the support for the curved part of the conveying tube body 100.

[0071] Example 10

[0072] This embodiment provides a second lumen 150 of different lengths. Except for the length of the second lumen 150 , the other structures of this embodiment are the same as those of embodiment 1, and will not be repeated here. In this embodiment, the length of the second lumen 150 may be less than the length of the first lumen 140 .

[0073] Embodiment 11

[0074] This embodiment provides a support component 160 with a different structure. Except for the structure of the support component 160, the other structures of the embodiment are the same as those of the embodiment 1, and will not be repeated here. In this embodiment, the support component 160 is divided into a first section and a second section from the proximal end to the distal end. The first section is a core wire structure of equal diameter, and the second section has a core wire structure of variable diameter and a sheath of equal diameter arranged on the outside of the core wire structure of variable diameter. The diameter of the core wire structure of the second section gradually decreases from the proximal end to the distal end, and the proximal end of the core wire structure of the second section is fixedly connected with the distal end of the core wire structure of the first section. The outer diameter of the sheath is equal to the diameter of the first section. The sheath can be a spring structure or a cylindrical structure made of polymer material.

[0075] It should be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0076] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A catheter for vascular intervention, characterized in that: include: A delivery tube body (100), the delivery tube body (100) comprising at least a protective layer (110), a support layer (120) and an inner lining layer (130) arranged in sequence from the outside to the inside, and the delivery tube body (100) is used to establish a passage along a blood vessel; A first lumen (140), the first lumen (140) extending axially along the delivery tube body (100) and used for delivering a therapeutic device; A second tubular cavity (150), wherein the second tubular cavity (150) is arranged in parallel with the first tubular cavity (140), and the length of the second tubular cavity (150) is not greater than the length of the first tubular cavity (140); A support component (160), the support component (160) being used to be inserted into the second tubular cavity (150) and to be slidably matched with the second tubular cavity (150), and the hardness of the support component (160) is lower than the hardness of the treatment device; During operation, after the delivery tube body (100) enters the blood vessel to establish a passage, the support component (160) enters the delivery tube body (100) along the second lumen (150) to improve the support of the delivery tube body (100).

2. The vascular intervention catheter according to claim 1, characterized in that: The hardness of the support component (160) gradually decreases from the proximal end to the distal end.

3. The vascular intervention catheter according to claim 2, characterized in that: The cross section of the second lumen (150) is circular, and the shape of the cross section of the support component (160) is similar to the shape of the cross section of the second lumen (150), and the diameter gradually decreases from the proximal end to the distal end.

4. The vascular intervention catheter according to claim 2, characterized in that: The cross section of the second lumen (150) is circular, the cross section of the support component (160) is similar in shape to the cross section of the second lumen (150), and the support component (160) comprises a plurality of equal-diameter sections (160a, 160b) whose diameters decrease successively from the proximal end to the distal end.

5. The vascular intervention catheter according to claim 4, characterized in that: The equal-diameter section (160a) at the proximal end of the support component (160) is a tubular structure, the equal-diameter section (160b) at the distal end of the support component (160) is inserted into the equal-diameter section (160a) at the proximal end and slidably cooperates with the equal-diameter section (160a) at the proximal end, and a driving component (170) is provided at the proximal end of the equal-diameter section (160b) at the distal end of the support component (160). The driving component (170) extends along the equal-diameter section (160b) at the proximal end and extends from the proximal end of the equal-diameter section (160b) at the proximal end, and is used to push and pull the equal-diameter section (160b) at the distal end in the axial direction.

6. The vascular intervention catheter according to claim 5, characterized in that: The driving component (170) is a push wire, and the diameter of the push wire is not greater than 1 / 10 of the diameter of the equal-diameter section (160b) at the proximal end.

7. The vascular intervention catheter according to any one of claims 3 to 6, characterized in that: The second tube cavity (150) is arranged outside the delivery tube body (100), and the cross section of the first tube cavity (140) is circular.

8. The vascular intervention catheter according to any one of claims 3 to 6, characterized in that: The second tube cavity (150) is arranged inside the conveying tube body (100), and the first tube cavity (140) and the second tube cavity (150) together constitute the inner cavity of the lining layer (130).

9. The vascular intervention catheter according to claim 2, characterized in that: The second tube cavity (150) is arranged on the protective layer (110) or the lining layer (130), and the cross-section of the second tube cavity (150) is arc-shaped. The cross-section of the supporting component (160) is similar to the cross-section of the second tube cavity (150), and the distal section of the supporting component (160) is provided with grooves (161a, 161b) arranged at intervals along the axial direction, and the grooves (161a, 161b) are arranged on both sides of the supporting component (160), and the grooves (161a, 161b) on both sides are staggered.

10. The vascular intervention catheter according to claim 2, characterized in that: The tube cavity of the conveying tube body (100) has an axially arranged partition (180), one side of the partition (180) and the inner wall of the lining layer (130) opposite to it constitute the first tube cavity (140), and the other side of the partition (180) and the inner wall of the lining layer (130) corresponding to it constitute the second tube cavity (150), and the partition (180) is in a straight line or a curve shape; the cross-section of the support component (160) is similar to the cross-section of the second tube cavity (150), and the section at the distal end of the support component (160) is arranged with grooves (161a, 161b) at intervals along the axial direction, and the grooves (161a, 161b) are arranged on both sides of the support component 160, and the grooves (161a, 161b) on both sides are staggered.

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