Pulmonary artery interventional therapy catheter and conveying system

Abstract

The utility model is suitable for the technical field of pulmonary artery interventional therapy devices, and provides a pulmonary artery interventional therapy catheter and a conveying system.The pulmonary artery interventional therapy catheter comprises a main catheter body, a guiding catheter body and an extending catheter body, the guiding catheter body is movably installed in the main catheter body, and a first elastic guiding section is formed at the far end of the guiding catheter body; the first elastic guide section can at least partially extend out of the far end of the main body catheter to form a first arc-shaped guide structure; the extension catheter is movably installed in the guiding catheter, a second elastic guiding section is formed at the far end of the extension catheter, and at least part of the second elastic guiding section can extend out of the far end of the guiding catheter to form a second arc-shaped guiding structure. According to the pulmonary artery interventional therapy catheter, the catheter does not need to be replaced in the interventional therapy process, and universality is high.

Description

Technical Field

[0001] This application belongs to the technical field of pulmonary artery interventional therapy devices, and more specifically, relates to a pulmonary artery interventional therapy catheter and delivery system. Background Technology

[0002] Pulmonary artery stenosis or occlusion can increase pulmonary vascular resistance and pulmonary artery pressure, ultimately leading to right ventricular failure and even death. These conditions include chronic thromboembolic pulmonary hypertension (CTEPH), pulmonary artery stenosis caused by aortitis, mediastinitis, or pulmonary lesions. Without effective treatment, the prognosis for these conditions is poor, and drug therapy has limited efficacy. In recent years, the efficacy and safety of balloon pulmonary angioplasty (BPA) for CTEPH have been confirmed. This technique has been widely used clinically in multiple centers both domestically and internationally. The effectiveness of BPA in treating pulmonary artery stenosis / occlusion caused by aortitis and mediastinitis has also been verified. BPA involves using an interventional device delivery system to deliver a balloon catheter to the target lesion in each segment or subsegment of the pulmonary artery for balloon dilation. This dilates the narrowed or occluded pulmonary artery lumen, thereby improving pulmonary blood flow perfusion, reducing pulmonary artery resistance, and lowering pulmonary artery pressure.

[0003] The pulmonary artery has numerous branches; the right pulmonary artery divides into 10 segments, and the left pulmonary artery into 9 segments. Each segment can further divide into 2-3 subsegments. Chronic thromboembolic pulmonary hypertension (BPA) typically involves multiple pulmonary segments or subsegments, requiring the treatment of as many as 40-60 target lesions. Efficient and successful delivery of the balloon catheter to each target vessel is crucial for BPA, but the numerous target lesions in the pulmonary artery and the varying opening angles of its branches (0°–90°) make this a critical issue.

[0004] However, most pulmonary artery interventional procedures currently use peripheral artery or coronary interventional devices, whose guiding catheter length or angle cannot be perfectly matched with the pulmonary artery. Different guiding catheters need to be changed during the interventional procedure, which increases the operation time, radiation dose and contrast agent usage, and also increases the risk of surgical complications. Utility Model Content

[0005] The purpose of this application is to provide a pulmonary artery interventional therapy catheter and delivery system, which aims to solve the technical problem in the prior art that the guiding catheter and the pulmonary artery cannot be completely matched, and different guiding catheters need to be replaced during interventional therapy.

[0006] To achieve the above objectives, according to one aspect of this application, a pulmonary artery interventional treatment catheter is provided, comprising: a main catheter, a guiding catheter, and an extension catheter, wherein the guiding catheter is movably installed within the main catheter, and a first elastic guiding segment is formed at the distal end of the guiding catheter, the first elastic guiding segment being able to extend at least partially from the distal end of the main catheter to form a first arc-shaped guiding structure; the extension catheter is movably installed within the guiding catheter, and a second elastic guiding segment is formed at the distal end of the extension catheter, the second elastic guiding segment being able to extend at least partially from the distal end of the guiding catheter to form a second arc-shaped guiding structure.

[0007] Optionally, the distal radial line of the first arc-shaped guide structure and the proximal radial line of the first arc-shaped guide structure have a first radial angle, the size of which is α, 0°≤a≤75°.

[0008] Optionally, a second radial angle exists between the distal radial line of the second arc-shaped guide structure and the proximal radial line of the second arc-shaped guide structure, the size of which is b, 0°≤b≤15°.

[0009] Optionally, when the axis of the first arc-shaped guide structure is coplanar with the axis of the second arc-shaped guide structure, and the distal end of the second arc-shaped guide structure coincides with or at least partially extends from the distal end of the guide catheter, the distal tangent of the second arc-shaped guide structure has a guide angle between it and the distal extension of the main catheter, the guide angle being c, where 90°≤c≤180°.

[0010] Optionally, the extension catheter includes a catheter segment and a pusher segment, the catheter segment being located at the distal end of the pusher segment, the proximal end of the pusher segment being able to extend at least partially from the proximal end of the main catheter, and the distal end of the catheter segment forming a second elastic guide segment.

[0011] Optionally, a first channel is provided inside the main conduit, and the guide conduit is movably installed in the first channel. An interface is provided at the proximal end of the main conduit, and the interface communicates with the first channel. The main conduit can communicate with external devices through the interface.

[0012] According to another aspect of this application, a delivery system is provided, the delivery system including a pulmonary artery interventional therapy catheter, the pulmonary artery interventional therapy catheter being the aforementioned pulmonary artery interventional therapy catheter.

[0013] Optionally, the delivery system also includes a balloon device that is movably fitted onto a pulmonary artery interventional catheter, which guides the movement of the balloon device.

[0014] Optionally, the delivery system also includes a pushing device disposed at the proximal end of the main catheter and drivenly connected to the guiding catheter and / or extension catheter for pushing the guiding catheter and / or extension catheter to move within the main catheter.

[0015] Optionally, the delivery system also includes a torque device located at the proximal end of the main conduit and drivenly connected to the guide conduit and / or extension conduit for driving the guide conduit and / or extension conduit to rotate within the main conduit.

[0016] The beneficial effects of the pulmonary artery interventional catheter provided in this application are as follows: Compared with the prior art, the pulmonary artery interventional catheter provided in this application, by movably installing the guiding catheter within the main catheter and the extension catheter within the extension catheter, and by configuring the first elastic guiding segment at the distal end of the guiding catheter to extend at least partially from the distal end of the catheter main body to form a first arc-shaped guiding structure, and configuring the second elastic guiding segment at the distal end of the extension catheter to extend at least partially from the distal end of the extension catheter to form a second arc-shaped guiding structure, allows the pulmonary artery interventional catheter provided in this application to adjust the diameter angle of the first arc-shaped guiding structure by changing the length of the first elastic guiding segment extending from the distal end of the catheter main body, and to adjust the diameter angle of the second arc-shaped guiding structure by changing the length of the second elastic guiding segment extending from the distal end of the guiding catheter, thereby achieving the distal bending angle of the pulmonary artery interventional catheter. The adjustable angle allows physicians to adjust the distal bending angle of the pulmonary artery interventional catheter in real time according to the opening location of the pulmonary artery branches, eliminating the need to change the catheter during interventional treatment. This makes it highly versatile. Furthermore, when using the pulmonary artery interventional catheter provided in this application for pulmonary artery interventional treatment, only the extension catheter can be inserted into the target vessel. In this case, the pulmonary artery interventional catheter provides less support within the target vessel, but its compliance is higher, making it suitable for most subsegmental pulmonary artery reticular lesions, localized stenosis lesions, and subtotal occlusion lesions. Alternatively, the guiding catheter and extension catheter can be inserted overlapping to reach the target vessel, providing even stronger support. Finally, the main catheter, guiding catheter, and extension catheter can be inserted overlapping to reach the target vessel, further enhancing the support provided by the pulmonary artery interventional catheter within the target vessel, which is beneficial for interventional treatment of occlusive lesions. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the main catheter structure provided in an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the guiding catheter provided in an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the structure of the extension catheter provided in an embodiment of this application;

[0021] Figure 4 A partial cross-sectional schematic diagram of the distal end of a pulmonary artery interventional catheter having a first arc-shaped guiding structure and a second arc-shaped guiding structure, provided for an embodiment of this application;

[0022] Figure 5 A partial cross-sectional schematic diagram of the distal end of a pulmonary artery interventional catheter with a first arc-shaped guiding structure, provided for an embodiment of this application;

[0023] Figure 6 A partial cross-sectional schematic diagram of the distal end of a pulmonary artery interventional catheter with a second arc-shaped guiding structure, provided for an embodiment of this application;

[0024] The details of the reference numerals used in the above figures are as follows:

[0025] 10. Main conduit; 11. Interface section;

[0026] 20. Guiding catheter; 21. First elastic guiding segment;

[0027] 30. Extension catheter; 31. Catheter segment; 311. Second elastic guide segment; 32. Push rod segment. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0029] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly or indirectly on that other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to that other element. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0032] As described in the background section, pulmonary artery stenosis or occlusion can increase pulmonary vascular resistance and pulmonary artery pressure, ultimately leading to right ventricular failure and even death. These conditions include chronic thromboembolic pulmonary hypertension (CTEPH), pulmonary artery stenosis caused by aortitis, mediastinitis, or pulmonary lesions. Without effective treatment, these conditions have a poor prognosis, and drug therapy has limited effectiveness. In recent years, the efficacy and safety of balloon pulmonary angioplasty (BPA) for CTEPH have been confirmed. This technique has been widely used clinically in multiple centers both domestically and internationally. The effectiveness of BPA in treating pulmonary artery stenosis / occlusion caused by aortitis and mediastinitis has also been verified. BPA (Balloon Percutaneous Pulmonary Artery) is an interventional procedure that uses a device delivery system to advance a balloon catheter to the target lesion in each segment or subsegment of the pulmonary artery for balloon dilation. This expands the lumen of the narrowed or occluded pulmonary artery, thereby improving pulmonary blood flow perfusion, reducing pulmonary artery resistance, and lowering pulmonary artery pressure. The pulmonary artery has numerous branches; the right pulmonary artery has 10 segments, and the left pulmonary artery has 9 segments, each of which can further divide into 2-3 subsegments. Chronic thromboembolic pulmonary hypertension typically involves multiple pulmonary segments or subsegments, requiring the treatment of as many as 40-60 target lesions. Efficient and successful delivery of the balloon catheter to each target vessel is crucial for BPA. However, the numerous target lesions in the pulmonary artery and the varying opening angles of the branches (0°–90°) present challenges. Currently, most pulmonary interventional procedures use peripheral artery or coronary interventional devices, whose guiding catheter lengths or angles cannot perfectly match the pulmonary artery. This necessitates changing different guiding catheters during the interventional procedure, increasing the operation time, radiation dose, and contrast agent usage, and also raising the risk of surgical complications.

[0033] See Figures 1 to 6As shown, in order to solve the above problems, according to one aspect of this application, an embodiment of this application provides a pulmonary artery interventional treatment catheter, which includes: a main catheter 10, a guiding catheter 20, and an extension catheter 30, wherein the guiding catheter 20 is movably installed in the main catheter 10, and a first elastic guiding segment 21 is formed at the distal end of the guiding catheter 20. The first elastic guiding segment 21 can extend at least partially from the distal end of the main catheter 10 to form a first arc-shaped guiding structure; the extension catheter 30 is movably installed in the guiding catheter 20, and a second elastic guiding segment 311 is formed at the distal end of the extension catheter 30. The second elastic guiding segment 311 can extend at least partially from the distal end of the guiding catheter 20 to form a second arc-shaped guiding structure. The pulmonary artery interventional catheter provided in this embodiment movably mounts a guiding catheter 20 within a main catheter 10 and an extension catheter 30 within an extension catheter 30. The first elastic guiding segment 21 at the distal end of the guiding catheter 20 is configured to extend at least partially from the distal end of the catheter body, forming a first arc-shaped guiding structure. Similarly, the second elastic guiding segment 311 at the distal end of the extension catheter 30 is configured to extend at least partially from the distal end of the extension catheter 30, forming a second arc-shaped guiding structure. This allows the pulmonary artery interventional catheter provided in this embodiment to adjust the diameter angle of the first arc-shaped guiding structure by changing the length of the first elastic guiding segment 21 extending from the distal end of the catheter body, and to adjust the diameter angle of the second arc-shaped guiding structure by changing the length of the second elastic guiding segment 311 extending from the distal end of the guiding catheter 20. This, in turn, allows physicians to adjust the distal bending angle of the pulmonary artery interventional catheter, enabling them to... The distal bending angle of the pulmonary artery interventional catheter can be adjusted in real time according to the opening position of the pulmonary artery branch, eliminating the need to change the catheter during interventional treatment. This makes it highly versatile. Furthermore, when using the pulmonary artery interventional catheter provided in this embodiment for pulmonary artery interventional treatment, only the extension catheter 30 can be inserted into the target vessel. In this case, the pulmonary artery interventional catheter provides less support within the target vessel, but its compliance is higher, making it suitable for most subsegmental pulmonary artery reticular lesions, localized stenosis lesions, and subtotal occlusion lesions. Alternatively, the guiding catheter 20 and the extension catheter 30 can be inserted overlappingly into the target vessel, providing even stronger support. Finally, the main catheter 10, guiding catheter 20, and extension catheter 30 can be inserted overlappingly into the target vessel, further enhancing the support provided by the pulmonary artery interventional catheter within the target vessel, which is beneficial for interventional treatment of occlusive lesions.

[0034] In one specific embodiment, the proximal end of each component of the pulmonary artery interventional catheter provided in this embodiment is the end closer to the operator, and the distal end of each component of the pulmonary artery interventional catheter is the end farther away from the operator.

[0035] Pulmonary artery lesions can be classified into localized stenosis, reticular lesions, subtotal occlusion, total occlusion, and tortuous occlusion. Currently, the success rate of opening pulmonary artery occlusion lesions is not high, mainly because existing single guiding catheters cannot provide sufficient support. While localized stenosis, reticular lesions, and subtotal occlusion lesions do not require very strong support, they do require a certain degree of catheter compliance to ensure that the catheter can reach each segment and subsegment of the pulmonary artery.

[0036] To address the aforementioned issues, the pulmonary artery interventional catheter provided in this embodiment has a guiding catheter 20 movably installed within the main catheter 10. The first elastic guiding segment 21 at the distal end of the guiding catheter 20 is configured to extend at least partially from the distal end of the catheter body, forming a first arc-shaped guiding structure. An extension catheter 30 is movably installed within the guiding catheter 20, and the second elastic guiding segment 311 at the distal end of the extension catheter 30 is configured to extend at least partially from the distal end of the extension catheter 30, forming a second arc-shaped guiding structure. This allows the pulmonary artery interventional catheter provided in this embodiment to reach the target vessel by inserting only the extension catheter 30 into the target vessel, with the guiding catheter 20 and extension catheter 30 overlapping and inserted. Within the target vessel, the main catheter 10, guiding catheter 20, and extension catheter 30 are inserted in an overlapping manner to provide different levels of support at the target vessel. When only the extension catheter 30 is inserted into the target vessel, the pulmonary artery interventional catheter provides less support but has higher compliance, making it suitable for most subsegmental pulmonary artery reticular lesions, localized stenosis lesions, and subtotal occlusion lesions. When the guiding catheter 20 and extension catheter 30 are inserted in an overlapping manner to reach the target vessel, or when the main catheter 10, guiding catheter 20, and extension catheter 30 are inserted in an overlapping manner to reach the target vessel, the pulmonary artery interventional catheter provides stronger support within the target vessel, which is beneficial for interventional treatment of occlusive lesions.

[0037] In one alternative embodiment, the main catheter 10 provided in this embodiment is a blood sheath.

[0038] In one alternative embodiment, the blood sheath provided in this embodiment is 75 cm in length.

[0039] In one optional embodiment, the outer diameter of the blood sheath provided in this embodiment is 7F, where 1F≈0.33mm.

[0040] In one alternative embodiment, the guiding catheter 20 provided in this embodiment has a length of 105 cm.

[0041] In one alternative embodiment, the outer diameter of the guiding catheter 20 provided in this embodiment is 6F.

[0042] In one alternative embodiment, the length of the extension catheter 30 provided in this embodiment is 125 cm.

[0043] See Figure 2 , Figure 4 and Figure 5 As shown, in a specific embodiment, there is a first radial angle between the distal diameter and the proximal diameter of the first arc-shaped guide structure, where the size of the first radial angle is α, 0°≤a≤75°. Adjusting the length of the guide catheter 20 extending distally from the main catheter 10 can change the size of the first radial angle of the first arc-shaped guide structure. The larger the first radial angle of the first arc-shaped guide structure, the greater the degree of distal bending of the pulmonary artery interventional catheter. Setting the size of the first radial angle to be greater than or equal to 0° and less than or equal to 75° allows the distal end of the pulmonary artery interventional catheter provided in this embodiment to have a greater degree of flexibility, thereby making the pulmonary artery interventional catheter applicable to most pulmonary artery branches.

[0044] In an optional embodiment, when the first meridian angle of the first arc-shaped guide structure provided in this embodiment is 75°, the distance between the distal end and the proximal end of the first arc-shaped guide structure in the length direction of the proximal end of the guide catheter 20 is 4 cm.

[0045] In one specific embodiment, the size of the first radial angle provided in this embodiment is set to be greater than or equal to 0° and less than or equal to 75°, so that when the guiding catheter 20 extends at least partially from the distal end of the main catheter 10, there is an adjustable angle range of 105° to 180° between the distal tangent of the guiding catheter 20 and the distal extension line of the main catheter 10.

[0046] See Figure 3 , Figure 4 and Figure 6 As shown, in a specific embodiment, the distal diameter of the second arc-shaped guide structure and the proximal diameter of the second arc-shaped guide structure have a second radial angle, the size of which is b, 0°≤b≤15°. Adjusting the length of the extension catheter 30 extending distal to the guiding catheter 20 can change the size of the second radial angle of the second arc-shaped guide structure. When guiding the movement of the pulmonary artery interventional catheter solely through the extension catheter 30 or simultaneously through the extension catheter 30 and the guiding catheter 20, the larger the second radial angle of the second arc-shaped guide structure, the greater the degree of distal bending of the pulmonary artery interventional catheter. Setting the size of the second radial angle to be greater than or equal to 0° and less than or equal to 15° can further increase the flexibility of the distal end of the pulmonary artery interventional catheter, thereby making the pulmonary artery interventional catheter applicable to all pulmonary artery branches.

[0047] In one specific embodiment, the second radial angle provided in this embodiment is set to be greater than or equal to 0° and less than or equal to 15°, so that when the extension catheter 30 extends at least partially from the distal end of the guiding catheter 20, there is an adjustable angle range of 165° to 180° between the distal tangent of the extension catheter 30 and the distal tangent of the guiding catheter 20.

[0048] In an optional embodiment, when the second meridian angle of the second arc-shaped guide structure provided in this embodiment is 15°, the distance between the distal end and the proximal end of the second arc-shaped guide structure in the length direction of the proximal end of the extension catheter 30 is 2 cm.

[0049] See Figures 4 to 6 As shown, in a specific embodiment, when the axis of the first arc-shaped guide structure is coplanar with the axis of the second arc-shaped guide structure, and the distal end of the second arc-shaped guide structure coincides with or at least partially extends from the distal end of the guiding catheter 20, a guiding angle exists between the distal tangent of the second arc-shaped guide structure and the distal extension line of the main catheter 10. The size of the guiding angle is c, where 90°≤c≤180°. The guiding angle between the distal tangent of the second arc-shaped guide structure and the distal extension line of the main catheter 10 reflects the degree of distal curvature of the pulmonary artery interventional catheter. By adjusting the length and direction of the first arc-shaped guide structure and / or the second arc-shaped guide structure, the size of the guiding angle can be changed. Setting the guiding angle to be greater than or equal to 90° and less than or equal to 180° allows the pulmonary artery interventional catheter to be applicable to all pulmonary artery branches.

[0050] See Figure 3 As shown, in one specific embodiment, the extension catheter 30 includes a catheter segment 31 and a pusher segment 32. The catheter segment 31 is located distal to the pusher segment 32, and the proximal end of the pusher segment 32 can extend at least partially from the proximal end of the main catheter 10. The distal end of the catheter segment 31 forms a second elastic guide segment 311. By setting the catheter segment 31 distal to the pusher segment 32 and configuring the proximal end of the pusher segment 32 to extend at least partially from the proximal end of the main catheter 10, a physician can push the catheter segment 31 within the main catheter 10 using the pusher segment 32.

[0051] In one alternative embodiment, the catheter segment 31 provided in this embodiment is 20 cm in length.

[0052] In one alternative embodiment, the outer diameter of the catheter segment 31 provided in this embodiment is 5F.

[0053] In one alternative embodiment, the length of the push rod segment 32 provided in this embodiment is 105cm.

[0054] See Figure 1 As shown, in a specific embodiment, the main conduit 10 has a first channel, and the guide conduit 20 is movably installed in the first channel. An interface portion 11 is provided at the proximal end of the main conduit 10, and the interface portion 11 communicates with the first channel. The main conduit 10 can communicate with external devices through the interface portion 11. By providing the interface portion 11 at the proximal end of the main conduit 10 and communicating it with the first channel, external devices can communicate with the main conduit 10 through the interface portion 11.

[0055] In one optional embodiment, the distal end of the guiding catheter 20 provided in this embodiment is provided with a contrast ring. By providing a contrast ring at the distal end of the guiding catheter 20, doctors can clearly observe the distal position of the guiding catheter 20 under imaging equipment such as X-rays.

[0056] In another embodiment, the distal end of the extension catheter 30 provided in this embodiment is provided with a contrast ring. By providing a contrast ring at the distal end of the extension catheter 30, doctors can clearly observe the distal position of the extension catheter 30 under imaging equipment such as X-rays.

[0057] In another embodiment, the distal end of the main catheter 10 provided in this embodiment is provided with a contrast ring. By providing a contrast ring at the distal end of the main catheter 10, doctors can clearly observe the distal position of the main catheter 10 under imaging equipment such as X-rays.

[0058] In an optional embodiment, the outer wall of the guiding catheter 20 and / or the extension catheter 30 provided in this embodiment is provided with a first scale line distributed along the length direction of the pulmonary artery interventional catheter. By providing the first scale line distributed along the length direction of the pulmonary artery interventional catheter on the outer wall of the guiding catheter 20, it can help doctors determine the length of the guiding catheter 20 and / or the extension catheter 30 inserted into the main catheter 10.

[0059] In an optional embodiment, the guiding catheter 20 and / or extension catheter 30 provided in this embodiment are provided with a second scale line distributed circumferentially along the pulmonary artery interventional catheter on their outer wall. By providing the second scale line distributed circumferentially along the pulmonary artery interventional catheter on the outer wall of the guiding catheter 20, it can help the doctor determine the circumferential position of the guiding catheter 20 and / or extension catheter 30 relative to the main catheter 10. According to another aspect of this application, a delivery system is provided, the delivery system including a pulmonary artery interventional catheter, the pulmonary artery interventional catheter being the aforementioned pulmonary artery interventional catheter.

[0060] In one specific embodiment, the delivery system further includes a balloon device movably fitted onto a pulmonary artery interventional catheter, which guides the movement of the balloon device. By movably fitting the balloon device onto the pulmonary artery interventional catheter, the delivery system can guide the balloon device through the pulmonary artery interventional catheter.

[0061] In one specific embodiment, the balloon device provided in this embodiment has a conventional structure in the prior art, which will not be described in detail here.

[0062] In one specific embodiment, the delivery system further includes a pushing device disposed at the proximal end of the main catheter 10 and drivenly connected to the guiding catheter 20 and / or the extension catheter 30, for pushing the guiding catheter 20 and / or the extension catheter 30 to move within the main catheter 10. By providing the pushing device at the proximal end of the main catheter 10 and drivingly connecting it to the guiding catheter 20 and / or the extension catheter 30, the delivery system can push the guiding catheter 20 and / or the extension catheter 30 via the pushing device, thereby adjusting the distal curvature of the pulmonary artery interventional catheter.

[0063] In one specific embodiment, the delivery system further includes a torque device disposed at the proximal end of the main catheter 10 and drivenly connected to the guiding catheter 20 and / or the extension catheter 30, for driving the guiding catheter 20 and / or the extension catheter 30 to rotate within the main catheter 10. By disposing of the torque device at the proximal end of the main catheter 10 and drivingly connecting it to the guiding catheter 20 and / or the extension catheter 30, the delivery system can rotate the guiding catheter 20 and / or the extension catheter 30 via the torque device, thereby adjusting the distal bending direction of the pulmonary artery interventional catheter.

[0064] In one specific embodiment, the specific structure of the pushing device and torque device provided in this embodiment is a conventional structure in the prior art, and will not be described in detail here.

[0065] In one specific embodiment, when using the delivery system provided in this embodiment for interventional treatment, the patient is first punctured with a percutaneous blood vessel. Then, the vascular sheath of the pulmonary artery interventional treatment catheter is inserted into the patient's left or right pulmonary artery along the guidewire. Next, the guiding catheter 20 is inserted through the vascular sheath along the guidewire to the openings of the left or right pulmonary artery segments. The extension catheter 30 is inserted through the guiding catheter 20 along the guidewire to the openings of the left or right pulmonary artery segments. The length of the guiding catheter 20 extending distal to the blood sheath and the length of the extension catheter 30 extending distal to the guiding catheter 20 are adjusted by a pushing device to change the curvature of the distal end of the pulmonary artery interventional treatment catheter. The guiding catheter 20 and the extension catheter 30 are rotated relative to the blood sheath by a torque device to change the curvature direction of the distal end of the pulmonary artery interventional treatment catheter, so that the distal end of the pulmonary artery interventional treatment catheter can accurately enter the target blood vessel. After the pulmonary artery interventional treatment catheter provided in this embodiment enters the target blood vessel, the balloon device can be delivered into the target blood vessel through the pulmonary artery interventional treatment catheter for interventional treatment.

[0066] In summary, the pulmonary artery interventional catheter and delivery system provided in this embodiment have at least the following beneficial technical effects: The pulmonary artery interventional catheter provided in this embodiment, by movably installing the guiding catheter 20 within the main catheter 10 and the extension catheter 30 within the extension catheter 30, and by configuring the first elastic guiding segment 21 at the distal end of the guiding catheter 20 to extend at least partially from the distal end of the catheter body to form a first arc-shaped guiding structure, and configuring the second elastic guiding segment 311 at the distal end of the extension catheter 30 to extend at least partially from the distal end of the extension catheter 30 to form a second arc-shaped guiding structure, allows the pulmonary artery interventional catheter provided in this embodiment to adjust the diameter angle of the first arc-shaped guiding structure by changing the length of the first elastic guiding segment 21 extending from the distal end of the catheter body, and to adjust the diameter angle of the second arc-shaped guiding structure by changing the length of the second elastic guiding segment 311 extending from the distal end of the guiding catheter 20, thereby achieving pulmonary artery intervention. The adjustable distal bending angle of the interventional catheter allows physicians to adjust the angle in real time according to the opening location of the pulmonary artery branches, eliminating the need to change the catheter during interventional treatment and offering greater versatility. Furthermore, when using the pulmonary artery interventional catheter provided in this embodiment for pulmonary interventional treatment, only the extension catheter 30 can be inserted into the target vessel. In this case, the pulmonary artery interventional catheter provides less support within the target vessel, but its compliance is higher, making it suitable for most subsegmental pulmonary artery reticular lesions, localized stenosis lesions, and subtotal occlusion lesions. Alternatively, the guiding catheter 20 and the extension catheter 30 can be inserted overlappingly into the target vessel, providing even stronger support. Finally, the main catheter 10, guiding catheter 20, and extension catheter 30 can be inserted overlappingly into the target vessel, further enhancing the support provided by the pulmonary artery interventional catheter within the target vessel, which is beneficial for interventional treatment of occlusive lesions.

[0067] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pulmonary artery interventional catheter, characterized in that, The pulmonary artery interventional catheter includes: Main catheter (10); A guiding catheter (20) is movably installed inside the main catheter (10). A first elastic guiding section (21) is formed at the distal end of the guiding catheter (20). The first elastic guiding section (21) can extend at least partially from the distal end of the main catheter (10) to form a first arc-shaped guiding structure. An extension catheter (30) is movably installed within the guiding catheter (20). The distal end of the extension catheter (30) is formed with a second elastic guiding section (311), which is at least partially extended from the distal end of the guiding catheter (20) to form a second arc-shaped guiding structure.

2. The pulmonary artery interventional catheter according to claim 1, characterized in that, The distal radial line of the first arc-shaped guide structure and the proximal radial line of the first arc-shaped guide structure have a first radial angle, the size of which is a, 0°≤a≤75°.

3. The pulmonary artery interventional catheter according to claim 1, characterized in that, The distal radial line of the second arc-shaped guide structure and the proximal radial line of the second arc-shaped guide structure have a second radial angle, the size of which is b, 0°≤b≤15°.

4. The pulmonary artery interventional catheter according to claim 1, characterized in that, When the axis of the first arc-shaped guide structure is coplanar with the axis of the second arc-shaped guide structure, and the distal end of the second arc-shaped guide structure coincides with or at least partially extends from the distal end of the guide catheter (20), the distal tangent of the second arc-shaped guide structure has a guide angle between it and the distal extension of the main catheter (10), the guide angle being c, where 90°≤c≤180°.

5. The pulmonary artery interventional catheter according to claim 1, characterized in that, The extension catheter (30) includes a catheter segment (31) and a push rod segment (32), the catheter segment (31) being located at the distal end of the push rod segment (32), the proximal end of the push rod segment (32) being able to extend at least partially from the proximal end of the main catheter (10), and the distal end of the catheter segment (31) forming the second elastic guide segment (311).

6. The pulmonary artery interventional catheter according to claim 1, characterized in that, The main conduit (10) is provided with a first channel, and the guide conduit (20) is movably installed in the first channel. The proximal end of the main conduit (10) is provided with an interface (11), which is connected to the first channel. The main conduit (10) can be connected to an external device through the interface (11).

7. A conveying system, characterized in that, The delivery system includes a pulmonary artery interventional therapy catheter, which is the pulmonary artery interventional therapy catheter as described in any one of claims 1 to 6.

8. The conveying system according to claim 7, characterized in that, The delivery system also includes a balloon device, which is movably fitted onto the pulmonary artery interventional catheter, and the pulmonary artery interventional catheter is used to guide the movement of the balloon device.

9. The conveying system according to claim 7, characterized in that, The delivery system further includes a pushing device disposed at the proximal end of the main conduit (10) and drivenly connected to the guiding conduit (20) and / or the extension conduit (30) for pushing the guiding conduit (20) and / or the extension conduit (30) to move within the main conduit (10).

10. The conveying system according to claim 7, characterized in that, The delivery system further includes a torque device disposed at the proximal end of the main conduit (10) and drivenly connected to the guide conduit (20) and / or the extension conduit (30) for driving the guide conduit (20) and / or the extension conduit (30) to rotate within the main conduit (10).

Images