Vascular suture device

Abstract

This application discloses a vascular suture device, including an operating component, a suture component, and a grasping component. The grasping component includes a first limiting member and a second limiting member, with the second limiting member surrounding the first limiting member. At least one of the first and second limiting members is connected to the operating component. The suture component is connected to the operating component and includes a suture needle with its tip facing the grasping component. The operating component can adjust the distance between the first and second limiting members. On the one hand, this reduces the frictional force on the suture needle as it moves to a predetermined position between the first and second limiting members, lowering the risk of separation between the suture needle and the suture. On the other hand, when the suture needle moves to the aforementioned predetermined position, the first and second limiting members can effectively clamp the suture needle under the action of the operating component, reducing the risk of the suture needle falling off the grasping component.

Description

Technical Field

[0001] This application belongs to the field of medical device technology, and in particular relates to a vascular suture device. Background Technology

[0002] Minimally invasive treatment is a treatment method that uses puncture needles, catheters, and other interventional devices under the guidance and monitoring of imaging equipment to insert specific instruments into the lesion site through natural orifices or tiny incisions in the human body for treatment. Taking vascular interventional medicine as an example, after opening an interventional port in the blood vessel, interventional devices are inserted into the blood vessel and delivered to the lesion site for treatment. After the treatment is completed, the interventional devices are retrieved and the interventional port is sutured.

[0003] Vascular suture devices are commonly used medical devices in vascular surgery, primarily for the repair and anastomosis of vascular injuries. However, the performance of current vascular suture devices still needs improvement. Utility Model Content

[0004] This application provides a vascular suture device that can improve the suturing performance of the vascular suture device.

[0005] In a first aspect, embodiments of this application provide a vascular suture device, including an operating component, a suture component, and a grasping component. The grasping component includes a first limiting member and a second limiting member, the second limiting member being disposed around the first limiting member, and at least one of the first limiting member and the second limiting member being connected to the operating component. The suture component is connected to the operating component and includes a suture needle with its tip facing the grasping component. The suture needle is configured to move in a direction close to or away from the grasping component. The operating component is at least used to adjust the distance between the first limiting member and the second limiting member, and the first limiting member and the second limiting member are configured to clamp the suture needle after it has moved to a predetermined position.

[0006] In some embodiments, the first limiting member includes an elastic member connected to the operating component, which is used to deform toward or away from the second limiting member under the action of the operating component.

[0007] In some embodiments, the elastic element includes a balloon, and the operating component includes a pressure regulating structure. The balloon is in communication with the pressure regulating structure and is used to expand in a direction close to the second limiting element or contract in a direction away from the second limiting element under the action of the pressure regulating structure.

[0008] In some embodiments, the elastic element further includes a protective tube that covers at least a portion of the balloon and is configured to expand or contract with the balloon, wherein the protective tube is located between the balloon and the suture needle in the capture state of the capture assembly.

[0009] In some embodiments, the elastic element includes a flexible tube, and the operating component includes a position adjustment structure. The flexible tube includes a fixed end and a movable end, the movable end being connected to the position adjustment structure. The flexible tube is used to adjust the relative position of the fixed end and the movable end under the action of the position adjustment structure, thereby realizing the deformation of the flexible tube in the direction of approaching or moving away from the second limiting element.

[0010] In some embodiments, the first limiting member further includes a fixing member, which includes a first fixing portion and a second fixing portion, the first fixing portion and the second fixing portion being arranged at a distance from each other, the flexible tube being located between the first fixing portion and the second fixing portion, the fixed end being fixedly disposed through the first fixing portion, and the movable end being connected to the operating component through the second fixing portion; and / or

[0011] The flexible tube has multiple notches in its wall, which are distributed along the circumference of the flexible tube.

[0012] In some embodiments, the distance between the first limiting member and the second limiting member is configured to be at least greater than the outer diameter of the suture needle before the suture needle moves to the predetermined position, and to be reduced to less than or equal to the outer diameter of the suture needle by adjustment of the operating component after the suture needle moves to the predetermined position.

[0013] In some embodiments, the operating component includes a first operating member and a second operating member, the first operating member being connected to the suture needle, and the second operating member being connected to at least one of the first limiting member and the second limiting member. The vascular suture device also includes a switch structure connected to the second operating member, the switch structure being configured to be triggered by the first operating member when the suture needle moves to a predetermined position, thereby causing the second operating member to adjust the distance between the first limiting member and the second limiting member.

[0014] In some embodiments, the suture assembly further includes a needle holder, a suture needle detachably disposed thereon, an operating component connected to the needle holder, and the needle holder being configured to separate from the suture needle after the suture needle is held between a first stop and a second stop.

[0015] In some embodiments, the operating component is configured to reduce the distance between the first and second limiting members after the suture needle has moved to a predetermined position in a direction close to the grasping component; or...

[0016] The operating component is configured to reduce the distance between the first and second limiting members as the suture needle moves in the region between the first and second limiting members in a direction close to the grasping component; or,

[0017] The operating component is configured to increase the distance between the first and second limit members before the suture needle moves in a direction close to the grasping component to the area between the first and second limit members, and to decrease the distance between the first and second limit members after the suture needle moves between the first and second limit members.

[0018] This application provides a vascular suture device, which includes an operating component, a suture component, and a grasping component. The grasping component includes a first limiting member and a second limiting member, with the second limiting member surrounding the first limiting member. At least one of the first and second limiting members is connected to the operating component. The suture component is connected to the operating component and includes a suture needle with its tip facing the grasping component. The suture needle is configured to move in a direction approaching or away from the grasping component. During vascular suturing, the suturing component can be inserted into the blood vessel, while the grasping component can be located outside the blood vessel. The operating component can move the suture needle and corresponding suture along the direction close to the grasping component, allowing the suture needle to pass through the blood vessel wall from the inside and move to a predetermined position between the first and second limiting members. During this process, the distance between the first and second limiting members can be set to be at least greater than the outer diameter of the suture needle, thereby helping to reduce the friction between the suture needle and the first and second limiting members, or even eliminating friction between the suture needle and the first and second limiting members. This reduces the risk of the suture needle separating from the grasping component during the grasping process. Furthermore, when the suture needle moves to the predetermined position between the first and second limiting members, the operating component can reduce the distance between the first and second limiting members, allowing the first and second limiting members to effectively clamp the suture needle. This helps to improve the reliability of the suture needle after it is grasped, reduces the risk of the suture needle falling off the grasping component, and improves the suturing performance of the vascular suturer. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a vascular suture device provided in one embodiment of this application;

[0021] Figure 2 The vascular suture device provided in some embodiments of this application is in Figure 1 A partial cross-sectional view at point AA in the middle;

[0022] Figure 3 This is a partial cross-sectional view of a vascular suture device installed in a blood vessel according to some embodiments of this application;

[0023] Figure 4 This is a partial cross-sectional view of the suture needle of the vascular suture device provided in some embodiments of this application after it has been moved to a predetermined position;

[0024] Figure 5 This is a partial cross-sectional view of the suture needle of the vascular suture device provided in other embodiments of this application after it has been moved to a predetermined position;

[0025] Figure 6 This is a structural diagram of the first limiting member of the vascular suture device provided in some embodiments of this application after the flexible tube is deformed in the direction closer to the second limiting member.

[0026] Label Explanation:

[0027] Vascular suture device 1000; vessel wall 2000;

[0028] Operating component 100; push handle 110; first operating element 120; second operating element 130; third operating element 140; suture assembly 200; suture needle 210; needle hub 220; capture assembly 300; first limiting element 310; elastic element 311; balloon 3111; protective tube 3112; flexible tube 3113; fixing element 312; first fixing part 3121; second fixing part 3122; second limiting element 320; support assembly 400; interventional catheter 500; distal end S1; proximal end S2. Detailed Implementation

[0029] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0031] In the vascular suture device, the grabbing component is located on the proximal side of the suture component. During the vascular suture process, the suture component can be inserted into the blood vessel first, and the grabbing component can be placed outside the blood vessel. By operating the component, the suture needle of the suture component and the suture thread connected to the suture needle can be driven from inside the blood vessel through the blood vessel wall and grabbed by the grabbing component outside the blood vessel.

[0032] Currently, during the capture process of the suture needle, the suture needle is prone to significant friction with the capture component. This friction can easily cause the suture to separate from the suture needle. Furthermore, the capture device has low reliability in capturing the suture needle, and the needle is prone to detaching from the capture component. Both the separation of the suture needle from the suture and the detachment of the suture needle from the capture component can easily lead to suturing failure, seriously affecting the suturing performance of the vascular suturer.

[0033] To address at least some of the aforementioned technical problems, embodiments of this application provide a vascular suture device. The vascular suture device provided by embodiments of this application is described below with reference to the accompanying drawings.

[0034] Please see Figures 1-3In a first aspect, embodiments of this application provide a vascular suture device 1000. The vascular suture device 1000 includes an operating component 100, a suture component 200, and a gripping component 300. The gripping component 300 includes a first limiting member 310 and a second limiting member 320, the second limiting member 320 being disposed around the first limiting member 310. At least one of the first limiting member 310 and the second limiting member 320 is connected to the operating component 100. The suture component 200 is connected to the operating component 100 and includes a suture needle 210, the tip of which is disposed toward the gripping component 300. The suture needle 210 is configured to move in a direction toward or away from the gripping component 300. The operating component 100 is at least used to adjust the distance between the first limiting member 310 and the second limiting member 320. The first limiting member 310 and the second limiting member 320 are configured to grip the suture needle 210 after it has moved to a predetermined position. In this embodiment, the vascular suture device 1000 may include a distal end S1 and a proximal end S2. The position of the vascular suture device 1000 closer to the operator is defined as the proximal end S2 of the vascular suture device 1000, and the position of the vascular suture device 1000 farther from the operator is defined as the distal end S1 of the vascular suture device 1000. The description of the distal end S1 and proximal end S2 of other components in the vascular suture device 1000 is based on a similar principle and will not be repeated hereafter.

[0035] In this application, the operation component 100 has a relatively complex function and structure. For example, the operation component 100 can be used to adjust the distance between all areas of the first limiting member 310 and the second limiting member 320 of the grasping component 300, thereby reducing the difficulty of matching the suture needle 210 with the grasping component 300. Alternatively, it can be used to adjust the distance between the areas of the first limiting member 310 and the second limiting member 320 that are opposite to the suture needle 210, without adjusting the distance between the areas of the first limiting member 310 and the second limiting member 320 that are not opposite to the suture needle 210, thereby reducing the difficulty of controlling the grasping component 300 by the operation component 100. Furthermore, the operation component 100 can also be used to drive the movement of the suture needle 210 of the suture component 200. In addition, the operation component 100 can also be used to drive other structures of the vascular suture device 1000, which is not limited in this embodiment. The specific structure of the operation component 100 will be described in detail below.

[0036] In some embodiments, the operating component 100 may include an automated drive structure such as a motor or cylinder.

[0037] In some other embodiments, the operating component 100 may also be driven by a mechanical drive. Optionally, the operating component 100 may include multiple operating parts, each of which may be connected to structures such as the suturing component 200 and the capture component 300. Operators can drive structures such as the suturing component 200 and the capture component 300 by operating each operating part.

[0038] The suture assembly 200 is used to suture blood vessels. Optionally, the suture assembly 200 is disposed on the side of the operating assembly 100 near the distal end S1, and the grasping assembly 300 can be disposed on the side of the suture assembly 200 near the proximal end S2. The suture assembly 200 includes a suture needle 210 with a needle tip facing the grasping assembly 300. The suture assembly 200 can be connected to the operating assembly 100 in various ways. The suture needle 210 can be directly connected to the operating assembly 100, or the suture assembly 200 can also include other structures such as a needle hub, and be connected to the operating assembly 100 via a structure such as a needle hub 220. After the suture assembly 200 is connected to the operating assembly 100, under the drive of the operating assembly 100, the suture needle 210 can move in a direction approaching or away from the grasping assembly 300. For example, the suture needle 210 can move in a direction approaching or away from the grasping assembly 300, or the suture needle 210 can rotate in a direction approaching or away from the grasping assembly 300.

[0039] The suture needle 210 can be connected to the suture thread. During vascular suturing, the suture assembly 200 can be inserted into the blood vessel, and the grasping assembly 300 can be located outside the blood vessel. The tip of the suture needle 210 faces the grasping assembly 300. Therefore, by operating the assembly 100 to move the suture needle 210 in a direction close to the grasping assembly 300, the tip of the suture needle 210 can pass through the blood vessel wall 2000 from inside the blood vessel, thereby moving the suture thread to outside the blood vessel.

[0040] It is understood that in some embodiments of this application, the suture assembly 200 may contain multiple suture needles 210, and the number of suture needles 210 may be even. For example, there may be two suture needles 210, each connected to one end of the same suture. Under the action of the operating component 100, the two suture needles 210 can pass through the blood vessel wall 2000 from opposite sides of the wound, respectively, pulling the two ends of the same suture. After knotting at both ends of the suture, the wound can be sutured. Of course, the number of suture needles 210 may also be odd. For example, there may be three suture needles 210, in which case one suture needle 210 passes through one end of two sutures, and the other two suture needles 210 pass through the other end of one suture. This embodiment does not limit this.

[0041] The grasping component 300 is used to grasp the suture needle 210 after it has passed through the blood vessel wall 2000 outside the blood vessel. The grasping component 300 can be arranged opposite to the suture needle 210 in the direction of its movement. During vascular suturing, the grasping component 300 can be located outside the blood vessel. After the suture needle 210 passes through the blood vessel wall 2000 from inside the blood vessel and moves outside the blood vessel, the operating component 100 can continue to drive the suture needle 210 to move in a direction close to the grasping component 300, so that the suture needle 210 can be grasped by the grasping component 300.

[0042] Specifically, the capture assembly 300 includes a first limiting member 310 and a second limiting member 320. The second limiting member 320 may be approximately sleeve-shaped and is disposed around the outer periphery of the first limiting member 310. Optionally, the vascular suture device 1000 may extend approximately along its own axis, and around the axis, the second limiting member 320 may be disposed around the first limiting member 310. At least one of the first limiting member 310 and the second limiting member 320 is connected to the operating assembly 100, which can at least adjust the distance between the first limiting member 310 and the second limiting member 320.

[0043] Before the suture needle 210 moves to the predetermined position between the first limiting member 310 and the second limiting member 320, the distance between the first limiting member 310 and the second limiting member 320 can be greater than the outer diameter of the suture needle 210, so that the suture needle 210 can move to the predetermined position between the first limiting member 310 and the second limiting member 320 more smoothly. This helps to reduce the friction between the suture needle 210 and the first limiting member 310 and the second limiting member 320, or even make the suture needle 210 frictionless with the first limiting member 310 and the second limiting member 320, thereby reducing the risk of the suture needle 210 separating from the suture needle 210 during the capture process. After the suture needle 210 moves to the aforementioned predetermined position, the operating component 100 can reduce the distance between the first limiting member 310 and the second limiting member 320, so that the first limiting member 310 and the second limiting member 320 clamp the suture needle 210. At this time, the operating component 100 can also flexibly adjust the clamping force of the first limiting member 310 and the second limiting member 320 on the suture needle 210, thereby helping to improve the reliability of the suture needle 210 after it is captured, reduce the risk of the suture needle 210 falling off the capturing component 300, and improve the suturing performance of the vascular suturer 1000.

[0044] It should be noted that the operating component 100 can adjust the distance between the first limiting member 310 and the second limiting member 320 in various ways. For example, the operating component 100 can adjust the shape and / or position of the first limiting member 310 to adjust the distance between the first limiting member 310 and the second limiting member 320. Alternatively, the operating component 100 can adjust the shape and / or position of the second limiting member 320 to adjust the distance between the first limiting member 310 and the second limiting member 320. Alternatively, the operating component 100 can adjust the shape and / or position of the first limiting member 310 while simultaneously adjusting the shape and / or position of the second limiting member 320, thereby adjusting the distance between the first limiting member 310 and the second limiting member 320. This embodiment does not limit this approach.

[0045] Please continue reading. Figure 2 and Figure 3 In some embodiments, the vascular suture device 1000 further includes a support component 400, which is disposed on the side of the suture component 200 near the proximal end S2. The support component 400 is connected to the operation component 100 and is used to unfold or retract under the action of the operation component 100.

[0046] Specifically, the support component 400 can be disposed between the suture component 200 and the grasping component 300. During vascular suture, the support component 400 can be located outside the blood vessel and can be deployed under the action of the operating component 100 to press against the blood vessel wall 2000 from the outside of the blood vessel, thereby supporting the blood vessel wall 2000. This helps to reduce the difficulty of the suture needle 210 passing through the blood vessel wall 2000, and also reduces the risk of damage to the blood vessel wall 2000 when the suture needle 210 passes through it.

[0047] The support assembly 400 can have various structures. For example, the support assembly 400 may include a balloon structure, which can be deployed or retracted by changing the internal air pressure of the balloon structure. Alternatively, the support assembly 400 may also include at least one rotatable wing, which can be deployed and retracted by rotation. Alternatively, the support assembly 400 may also include other rigid structures capable of deployment and retraction, which are not limited in this embodiment.

[0048] Optionally, such as Figure 1 As shown, the operating component 100 may include a push handle 110, which is connected to the support component 400 and is used to drive the support component 400 to unfold or retract.

[0049] Please continue reading. Figure 2 and Figure 3In some embodiments, the first limiting member 310 includes an elastic member 311, which is connected to the operating component 100. The elastic member 311 is used to deform toward or away from the second limiting member 320 under the action of the operating component 100.

[0050] Specifically, under the action of the operating component 100, if the elastic member 311 deforms toward the second limiting member 320, the distance between the first limiting member 310 and the second limiting member 320 will decrease; if the elastic member 311 deforms in a direction away from the second limiting member 320, the distance between the first limiting member 310 and the second limiting member 320 will increase.

[0051] For example, when the suture needle 210 moves in a direction close to the grasping assembly 300 to a predetermined position between the first limiting member 310 and the second limiting member 320, the operating assembly 100 can drive the elastic member 311 to deform in a direction close to the second limiting member 320 to reduce the distance between the elastic member 311 and the second limiting member 320, so that the elastic member 311 and the second limiting member 320 can clamp the suture needle 210.

[0052] In this embodiment, the first limiting member 310 includes an elastic member 311. By changing the shape of the elastic member 311, the distance between the first limiting member 310 and the second limiting member 320 can be adjusted, which helps to simplify the structure of the operation component 100 and the capture component 300 and reduce the difficulty of adjusting the distance between the first limiting member 310 and the second limiting member 320.

[0053] Please see Figure 4 In some embodiments, the elastic element 311 includes a balloon 3111, and the operating component 100 includes a pressure regulating structure. The balloon 3111 is connected to the pressure regulating structure. The balloon 3111 can be used to expand in the direction close to the second limiting member 320 under the action of the pressure regulating structure, and can also be used to contract in the direction away from the second limiting member 320 under the action of the operating component 100.

[0054] The pressure regulating structure may include an inflation / deflation channel, one end of which may connect to the balloon 3111, and the other end to an external device. The operating component 100 may include a switch for activating the external device. Under the action of the operating component 100, the external device can regulate the air pressure inside the balloon 3111 through the pressure regulating structure, causing the balloon 3111 to inflate or deflate. Optionally, the external device may inflate or deflate the balloon 3111 to cause it to inflate or deflate. Alternatively, the external device may also inflate or depress the balloon 3111 with liquid to cause it to inflate or deflate.

[0055] Specifically, when the balloon 3111 is inflated or filled with liquid, the balloon 3111 can expand outward. At this time, the balloon 3111 is equivalent to deforming in the direction closer to the second limiting member 320, and the distance between the balloon 3111 and the second limiting member 320 decreases. When the balloon 3111 is deflated or drained, the balloon 3111 can contract inward. At this time, the balloon 3111 is equivalent to deforming in the direction away from the second limiting member 320, and the distance between the balloon 3111 and the second limiting member 320 increases.

[0056] In this embodiment, the elastic element 311 includes a balloon 3111, and the operating component 100 includes a pressure adjustment mechanism. By changing the internal pressure of the balloon 3111 through the pressure adjustment mechanism, the distance between the first limiting member 310 and the second limiting member 320, as well as the clamping force of the first limiting member 310 and the second limiting member 320 on the suture needle 210, can be flexibly adjusted. At the same time, it also helps to further simplify the structure of the operating component 100 and the grasping component 300, and further reduce the difficulty of adjusting the distance between the first limiting member 310 and the second limiting member 320.

[0057] Please see Figure 4 In some embodiments, the elastic element 311 further includes a protective tube 3112 that covers at least a portion of the balloon 3111. The protective tube 3112 is configured to expand or contract with the balloon 3111. In the capture state of the capture assembly 300, the protective tube 3112 is located between the balloon 3111 and the suture needle 210.

[0058] Specifically, the protective tube 3112 can be an elastic tube. When the balloon 3111 is inflated or filled with liquid to make the balloon 3111 expand outward, the protective tube 3112 can deform along the direction close to the second limiting member 320 under the action of the balloon 3111 to achieve outward expansion. When the balloon 3111 is deflated or drained to make the balloon 3111 contract inward, the protective tube 3112 can recover its deformation along the direction away from the second limiting member 320 to achieve contraction.

[0059] The hardness of the protective tube 3112 can be greater than that of the balloon 3111. The protective tube 3112 covers at least a portion of the balloon 3111 and can protect the balloon 3111. In the capture state of the capture assembly 300, when the suture needle 210 moves between the balloon 3111 and the second limiting member 320, the protective tube 3112 can be located between the balloon 3111 and the suture needle 210 to effectively separate the suture needle 210 and the outer wall of the balloon 3111, reduce the risk of the suture needle 210 accidentally puncturing the balloon 3111, and help improve the reliability of the capture assembly 300 in capturing the suture needle 210.

[0060] The protective tube 3112 can completely cover the balloon 3111, or the protective tube 3112 can be arranged around the balloon 3111 circumferentially along the second limiting member 320 to effectively separate the suture needle 210 and the balloon 3111.

[0061] Please see Figure 5 In some embodiments, the elastic element 311 includes a flexible tube 3113, and the operating component 100 includes a position adjustment structure. The flexible tube 3113 includes a fixed end and a movable end. The movable end is connected to the position adjustment structure. The flexible tube 3113 is used to adjust the relative position of the fixed end and the movable end under the action of the position adjustment structure, thereby realizing the deformation of the flexible tube 3113 in the direction of approaching or moving away from the second limiting element 320.

[0062] A flexible tube 3113 refers to a tubular structure that can deform under external force. The material of the flexible tube 3113 may include metallic materials, non-metallic materials, or other materials. The flexible tube 3113 may have a fixed end and a movable end. The fixed end can be fixedly installed, and the movable end is connected to the operating component 100. The fixed end and the movable end may be arranged approximately along a direction from the proximal end S2 to the distal end S1 or from the distal end S1 to the proximal end S2.

[0063] It is known that the flexible tube 3113 is a hollow tubular structure, with its movable end connected to a position adjustment structure. When the position adjustment structure applies an external force to the flexible tube 3113, causing the movable end of the flexible tube 3113 to move closer to the fixed end, the tube wall at each point of the flexible tube 3113 deforms towards the second limiting member 320 under the action of this external force, thereby reducing the distance between the corresponding parts of the flexible tube 3113 and the second limiting member 320 in the circumferential direction. When the position adjustment structure applies an external force to the flexible tube 3113, causing the movable end of the flexible tube 3113 to move away from the fixed end, the tube wall at each point of the flexible tube 3113 deforms away from the second limiting member 320 under the action of this external force, thereby increasing the distance between the corresponding parts of the flexible tube 3113 and the second limiting member 320 in the circumferential direction.

[0064] In this embodiment, the elastic element 311 includes a flexible tube 3113, and the operating component 100 includes a position adjustment structure. The position adjustment structure applies an external force to the flexible tube 3113, causing the flexible tube 3113 to deform itself, thereby adjusting the distance between the first limiting member 310 and the second limiting member 320. On the one hand, this simplifies the structure of the operating component 100 and the capture component 300. On the other hand, compared to the elastic element 311 including a balloon 3111, which adjusts the distance between the first limiting member 310 and the second limiting member 320 by inflating or deflating the balloon 3111, the structure of the flexible tube 3113 in this embodiment is less likely to be affected by external factors such as the suture needle 210, thus helping to improve the reliability of the capture component 300 in capturing the suture needle 210.

[0065] Please see Figure 6 In some embodiments, the first limiting member 310 further includes a fixing member 312, which includes a first fixing part 3121 and a second fixing part 3122. The first fixing part 3121 and the second fixing part 3122 are arranged at a distance from each other. The flexible tube 3113 is located between the first fixing part 3121 and the second fixing part 3122. The fixed end is fixedly set through the first fixing part 3121, and the movable end is connected to the operating component 100 through the second fixing part 3122.

[0066] The first fixing part 3121 and the second fixing part 3122 can have various shapes; for example, the first fixing part 3121 and the second fixing part 3122 can be block-shaped. The first fixing part 3121 and the second fixing part 3122 are arranged at intervals relative to each other in the direction from the proximal end S2 to the distal end S1 or from the distal end S1 to the proximal end S2.

[0067] It is known that the flexible tube 3113 is a hollow tubular structure with open ends. When the flexible tube 3113 is placed between the first fixing part 3121 and the second fixing part 3122, the first fixing part 3121 and the second fixing part 3122 can respectively block the two openings of the flexible tube 3113 and connect to the corresponding ends of the flexible tube 3113 along the circumference of the flexible tube 3113.

[0068] The fixed end of the flexible tube 3113 is fixedly set by the first fixing part 3121, and the movable end is connected to the operating component 100 by the second fixing part 3122, which helps to reduce the assembly difficulty of the flexible tube 3113.

[0069] In some embodiments, the flexible tube 3113 has multiple notches in its wall, which are distributed along the circumference of the flexible tube 3113. This helps to reduce the difficulty of the flexible tube 3113 deforming in different directions along the circumference towards or away from the second limiting member 320.

[0070] Optionally, multiple notches are evenly distributed along the circumference of the flexible tube 3113, which helps to further reduce the difficulty of the flexible tube 3113 deforming at various points in the circumference towards or away from the second limiting member 320.

[0071] In some embodiments, the first limiting member 310 includes a first magnetic attracting member and a second magnetic attracting member. The second magnetic attracting member is disposed around the outer periphery of the first magnetic attracting member. Either the first magnetic attracting member or the second magnetic attracting member is energized and its polarity can be changed after being energized. The second magnetic attracting member is configured to deform in a direction approaching or moving away from the second limiting member 320. Before the suture needle 210 moves to a predetermined position between the first limiting member 310 and the second limiting member 320, the first magnetic attracting member and the second magnetic attracting member have opposite polarities and can attract each other. After the suture needle 210 moves to the predetermined position, one of the first magnetic attracting member and the second magnetic attracting member is energized and its polarity is changed. The first magnetic attracting member and the second magnetic attracting member have the same polarity and can repel each other. The repulsive force between them causes the second magnetic attracting member to deform in a direction approaching the second limiting member 320, thereby reducing the distance between the first limiting member 310 and the second limiting member 320.

[0072] In some embodiments, the distance between the first limiting member 310 and the second limiting member 320 is configured to be at least greater than the outer diameter of the suture needle 210 before the suture needle 210 moves to the predetermined position, and then reduced to less than or equal to the outer diameter of the suture needle 210 by the adjustment of the operating component 100 after the suture needle 210 moves to the predetermined position.

[0073] In this embodiment, the distance between the first limiting member 310 and the second limiting member 320 is configured to be at least greater than the outer diameter of the suture needle 210 before the suture needle 210 moves to the predetermined position. That is, in the initial state of the grasping assembly 300, the distance between the first limiting member 310 and the second limiting member 320 is at least greater than the outer diameter of the suture needle 210. Therefore, the operating assembly 100 does not need to adjust the distance between the first limiting member 310 and the second limiting member 320 before the suture needle 210 moves to the predetermined position. It only needs to reduce the distance between the first limiting member 310 and the second limiting member 320 after the suture needle 210 moves to the predetermined position between the first limiting member 310 and the second limiting member 320, so that the distance is less than or equal to the outer diameter of the suture needle 210. This helps to simplify the operation steps, reduce the operation difficulty, and improve the grasping efficiency of the grasping assembly 300.

[0074] Furthermore, before the suture needle 210 moves to the predetermined position, the distance between the first limiting member 310 and the second limiting member 320 can be greater than the sum of the outer diameter of the suture needle 210 and the line width of the suture thread, which helps to further reduce the friction between the suture needle 210 and the suture thread and the capture assembly 300, or even make the suture needle 210 and the suture thread and the capture assembly 300 frictionless.

[0075] In other embodiments, the distance between the first limiting member 310 and the second limiting member 320 in the initial state may be less than or equal to the sum of the outer diameter of the suture needle 210 and the width of the suture thread. Before the suture needle 210 moves to the predetermined position, the operating component 100 may first increase the distance between the first limiting member 310 and the second limiting member 320, making the distance greater than the sum of the outer diameter of the suture needle 210 and the width of the suture thread. Then, after the suture needle 210 moves to the predetermined position, the operating component 100 may reduce the distance between the first limiting member 310 and the second limiting member 320, making the distance between the first limiting member 310 and the second limiting member 320 less than or equal to the sum of the outer diameter of the suture needle 210 and the width of the suture thread, in order to clamp the suture needle 210.

[0076] Please see Figure 2 and Figure 6 In some embodiments, the operating component 100 includes a first operating element 120 and a second operating element 130. The first operating element 120 is connected to the suture needle 210, and the second operating element 130 is connected to at least one of the first limiting element 310 and the second limiting element 320. The vascular suture device 1000 also includes a switch structure connected to the second operating element 130. The switch structure is configured to be triggered by the first operating element 120 when the suture needle 210 moves to a predetermined position, so that the second operating element 130 adjusts the distance between the first limiting element 310 and the second limiting element 320.

[0077] The first operating member 120 can be directly or indirectly connected to the suture needle 210 for moving the suture needle 210 between the proximal end S2 and the distal end S1. The second operating member 130 is connected to at least one of the first limiting member 310 and the second limiting member 320 to adjust the distance between the first limiting member 310 and the second limiting member 320. The second operating member 130 may include the aforementioned pressure adjustment structure, or it may include the aforementioned position adjustment structure.

[0078] The switch structure is connected to the second operating member 130. It can be triggered by the first operating member 120 when the suture needle 210 moves to a predetermined position. After being triggered, the switch structure can drive the second operating member 130, so that the second operating member 130 automatically reduces the distance between the first limiting member 310 and the second limiting member 320, thereby realizing the automatic capture of the suture needle 210. This helps to further reduce the operation difficulty of the vascular suturer 1000 and improve the suturing efficiency of the vascular suturer 1000.

[0079] In this application, the switch structure can be of various types. In one example, the switch structure may include a spring connected to the second operating member 130. When the first operating member 120 drives the suture needle 210 to move in the direction close to the proximal end S2, the spring can be compressed or stretched by the first operating member 120. Before the suture needle 210 moves to the predetermined position, the compression or stretching of the spring may be less than the critical value at which the spring can drive the second operating member 130, and the switch structure is not triggered. When the suture needle 210 moves to the predetermined position, the compression or stretching of the spring is greater than the critical value at which the spring can drive the second operating member 130, and the switch structure is triggered. The elastic force of the spring can drive the second operating member 130, causing the second operating member 130 to reduce the distance between the first limiting member 310 and the second limiting member 320, thereby realizing the automatic capture of the suture needle 210.

[0080] In another example, the switch structure can be a magnetic attraction device. For example, the switch structure may include a first magnetic attraction component disposed on the first operating member 120 and a second magnetic attraction component disposed on the second operating member 130. When the suture needle 210 moves to the predetermined position, the first magnetic attraction component and the second magnetic attraction component generate a large magnetic force. Under the action of the magnetic force, the second operating member 130 reduces the distance between the first limiting member 310 and the second limiting member 320, thereby realizing the automatic capture of the suture needle 210.

[0081] Please continue reading. Figure 2 The operating component 100 may also include a third operating element 140, which is connected to the support component 400 to drive the support component 400 to unfold or retract.

[0082] Please continue reading. Figure 2 , Figure 4 and Figure 5 In some embodiments, the suture assembly 200 further includes a needle holder 220, a suture needle 210 detachably disposed on the needle holder 220, an operating assembly 100 connected to the needle holder 220, and the needle holder 220 configured to be detachable from the suture needle 210 after the suture needle 210 is clamped between the first limiting member 310 and the second limiting member 320.

[0083] Specifically, the operating component 100 is connected to the suture needle 210 via the needle holder 220. Compared to being directly connected to the suture needle 210, the operating component 100 does not directly apply force to the suture needle 210, which helps to reduce the risk of the suture needle 210 breaking.

[0084] The suture needle 210 is detachably connected to the needle holder 220 to facilitate the assembly and disassembly of the suture needle 210.

[0085] During vascular suturing, the operating component 100 can move the suture needle 210 along the direction close to the grasping component 300 via the needle holder 220 until the suture needle 210 moves to a predetermined position between the first limiting member 310 and the second limiting member 320 and is clamped by the first limiting member 310 and the second limiting member 320. Then, the operating component 100 can apply an external force to the needle holder 220 along the direction close to the distal end S1. Under the action of this external force and the clamping force of the first limiting member 310 and the second limiting member 320 on the suture needle 210, the needle holder 220 can separate from the suture needle 210. After separation, the needle holder 220 can move away from the grasping component 300 under the action of the operating component 100, thus achieving repositioning.

[0086] Please see Figure 1 In some embodiments, the vascular suture device 1000 further includes an interventional catheter 500, which has at least one push chamber. A portion of the operating component 100 is disposed in the push chamber and connected via the push chamber to at least one of the suture needle 210, the support component 400, the first limiting member 310, and the second limiting member 320.

[0087] A portion of the operating component 100 may be located outside the interventional catheter 500 for operation by an operator, while another portion is integrated inside the interventional catheter 500 and connected to structures such as the suture component 200 through the push cavity of the interventional catheter 500, so as to facilitate the intervention of the vascular suture device 1000 into the human body.

[0088] In some embodiments, the operating component 100 is configured to reduce the distance between the first limiting member 310 and the second limiting member 320 after the suture needle 210 has moved to a predetermined position in a direction close to the grasping component 300.

[0089] In this embodiment, the distance between the first limiting member 310 and the second limiting member 320 in the initial state can be greater than the sum of the outer diameter of the suture needle 210 and the width of the suture thread. The operating component 100 does not need to adjust the distance between the first limiting member 310 and the second limiting member 320 before the suture needle 210 moves to the predetermined position. It only needs to reduce the distance between the first limiting member 310 and the second limiting member 320 after the suture needle 210 moves to the predetermined position between the first limiting member 310 and the second limiting member 320, so that the first limiting member 310 and the second limiting member 320 can clamp the suture needle 210.

[0090] In other embodiments, the operating component 100 is configured to reduce the distance between the first stop 310 and the second stop 320 as the suture needle 210 moves in a direction close to the grasping component 300 within the area between the first stop 310 and the second stop 320.

[0091] In this embodiment, the distance between the first limiting member 310 and the second limiting member 320 in the initial state can be greater than the sum of the outer diameter of the suture needle 210 and the width of the suture thread. The operating component 100 does not need to adjust the distance between the first limiting member 310 and the second limiting member 320 before the suture needle 210 moves to the predetermined position. It can gradually reduce the distance between the first limiting member 310 and the second limiting member 320 as the suture needle 210 enters the area between the first limiting member 310 and the second limiting member 320 and moves in the area, so that the first limiting member 310 and the second limiting member 320 clamp the suture needle 210.

[0092] In some other embodiments, the operating component 100 is configured to increase the distance between the first limit member 310 and the second limit member 320 before the suture needle 210 moves in a direction close to the grasping component 300 to the area between the first limit member 310 and the second limit member 320, and to decrease the distance between the first limit member 310 and the second limit member 320 after the suture needle 210 moves to a predetermined position.

[0093] In this embodiment, the distance between the first limiting member 310 and the second limiting member 320 in the initial state can be less than or equal to the sum of the outer diameter of the suture needle 210 and the line width of the suture. Before the suture needle 210 moves to the predetermined position between the first limiting member 310 and the second limiting member 320, the operating component 100 can first increase the distance between the first limiting member 310 and the second limiting member 320 so that the distance is greater than the sum of the outer diameter of the suture needle 210 and the line width of the suture. Then, after the suture needle 210 moves to the predetermined position, the operating component 100 reduces the distance between the first limiting member 310 and the second limiting member 320 so that the first limiting member 310 and the second limiting member 320 clamp the suture needle 210.

[0094] In some other embodiments, the operating component 100 is configured to increase the distance between the first limit member 310 and the second limit member 320 before the suture needle 210 moves in a direction close to the grasping component 300 to the area between the first limit member 310 and the second limit member 320, and to decrease the distance between the first limit member 310 and the second limit member 320 during the movement of the suture needle 210 in the area between the first limit member 310 and the second limit member 320.

[0095] In this embodiment, the distance between the first limiting member 310 and the second limiting member 320 in the initial state can be less than or equal to the sum of the outer diameter of the suture needle 210 and the line width of the suture. Before the suture needle 210 moves to the predetermined position between the first limiting member 310 and the second limiting member 320, the operating component 100 can first increase the distance between the first limiting member 310 and the second limiting member 320 so that the distance is greater than the sum of the outer diameter of the suture needle 210 and the line width of the suture. Subsequently, as the suture needle 210 enters the area between the first limiting member 310 and the second limiting member 320 and moves within this area, the operating component 100 can gradually reduce the distance between the first limiting member 310 and the second limiting member 320 so that the first limiting member 310 and the second limiting member 320 clamp the suture needle 210.

[0096] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A vascular suture device, characterized in that, include: Operational components; The capture component includes a first limiting member and a second limiting member, the second limiting member being disposed around the first limiting member, and at least one of the first limiting member and the second limiting member being connected to the operating component. A suture assembly connected to the operating assembly, the suture assembly including a suture needle with the tip of the suture needle facing the grasping assembly, the suture needle being configured to move in a direction toward or away from the grasping assembly; The operating component is at least used to adjust the distance between the first limiting member and the second limiting member, which are configured to clamp the suture needle when the suture needle moves to a predetermined position.

2. The vascular suture device according to claim 1, characterized in that, The first limiting member includes an elastic member, which is connected to the operating component and is used to deform toward or away from the second limiting member under the action of the operating component.

3. The vascular suture device according to claim 2, characterized in that, The elastic element includes a balloon, and the operating component includes a pressure regulating structure. The balloon is connected to the pressure regulating structure, and the balloon is used to expand in the direction close to the second limiting member or contract in the direction away from the second limiting member under the action of the pressure regulating structure.

4. The vascular suture device according to claim 3, characterized in that, The elastic element further includes a protective tube that covers at least a portion of the balloon and is configured to expand or contract with the balloon. In the capture state of the capture assembly, the protective tube is located between the balloon and the suture needle.

5. The vascular suture device according to claim 2, characterized in that, The elastic element includes a flexible tube, and the operating component includes a position adjustment structure. The flexible tube includes a fixed end and a movable end. The movable end is connected to the position adjustment structure. The flexible tube is used to adjust the relative position of the fixed end and the movable end under the action of the position adjustment structure, thereby realizing the deformation of the flexible tube in the direction of approaching or moving away from the second limiting element.

6. The vascular suture device according to claim 5, characterized in that, The first limiting member further includes a fixing member, which includes a first fixing part and a second fixing part, the first fixing part and the second fixing part being arranged at a distance from each other, the flexible tube being located between the first fixing part and the second fixing part, the fixed end being fixedly disposed through the first fixing part, and the movable end being connected to the operating component through the second fixing part; and / or, The flexible tube has multiple notches in its wall, and these notches are distributed along the circumference of the flexible tube.

7. The vascular suture device according to any one of claims 1-6, characterized in that, The distance between the first limiting member and the second limiting member is configured to be at least greater than the outer diameter of the suture needle before the suture needle moves to the predetermined position, and then reduced to less than or equal to the outer diameter of the suture needle by the adjustment of the operating component after the suture needle moves to the predetermined position.

8. The vascular suture device according to claim 7, characterized in that, The operating assembly includes a first operating member and a second operating member, the first operating member being connected to the suture needle, and the second operating member being connected to at least one of the first limiting member and the second limiting member. The vascular suture device further includes a switch structure connected to the second operating member. The switch structure is configured to be triggered by the first operating member when the suture needle moves to the predetermined position, causing the second operating member to adjust the distance between the first limiting member and the second limiting member.

9. The vascular suture device according to any one of claims 1-6, characterized in that, The suture assembly further includes a needle holder, the suture needle is detachably disposed on the needle holder, the operating component is connected to the needle holder, and the needle holder is configured to separate from the suture needle after the suture needle is clamped between the first limiting member and the second limiting member.

10. The vascular suture device according to any one of claims 1-6, characterized in that, The operating component is configured to reduce the distance between the first limiting member and the second limiting member after the suture needle moves to the predetermined position in a direction close to the grasping component; or, The operating component is configured to reduce the distance between the first limiting member and the second limiting member as the suture needle moves in the area between the first limiting member and the second limiting member in a direction close to the grasping component; or, The operating component is configured to increase the distance between the first and second limiting members before the suture needle moves in a direction close to the grasping component to the area between the first and second limiting members, and to decrease the distance between the first and second limiting members after the suture needle moves between the first and second limiting members.

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