Blood vessel closing device

Abstract

The present invention relates to a vascular closure device comprising: an outer tube extending along a longitudinal axis; a sealant disposed on a distal end side in the outer tube; the push tube is arranged in the outer tube in a sliding manner, and the far end side of the push tube is close to the sealant; the connecting rod assembly comprises a center rod, a pull rod and a push rod, the two ends of the pull rod are rotationally connected with one end of the center rod and the outer pipe respectively, and the two ends of the push rod are rotationally connected with the other end of the center rod and the push pipe respectively; the movement of the center rod can drive the outer pipe and the push pipe to move oppositely so that the sealant can be pushed out of the outer pipe to be released. The blood vessel closing device is easy to operate and good in hemostatic effect.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and in particular to a vascular closure device. Background Technology

[0002] Interventional therapy, guided by medical imaging equipment, involves using a puncture needle to create a channel and inserting specialized catheters, guidewires, and other precision instruments into the body through a vascular puncture site (or opening) to diagnose and treat internal conditions. After the interventional procedure, the vascular puncture site must be closed to stop bleeding.

[0003] Currently, common methods for hemostasis at the puncture site after interventional procedures include manual compression and mechanical compression. However, these methods suffer from long compression times, poor hemostatic effects, and complications such as bleeding, oozing, and hematoma. While specialized vascular closure devices for hemostasis have been developed, existing devices are complex to operate, require a high level of operator skill, and necessitate repeated switching between different instruments to accurately locate and close the puncture site. Summary of the Invention

[0004] Therefore, it is necessary to provide a vascular closure device to address the problems of complex operation and poor hemostasis effect of existing vascular closure devices during the closure process. This vascular closure device includes: an outer tube extending along a longitudinal axis; a sealant disposed at the distal end of the outer tube; a push tube slidably disposed within the outer tube, with its distal end close to the sealant; and a linkage assembly including a central rod, a pull rod, and a push rod. The two ends of the pull rod are rotatably connected to one end of the central rod and the outer tube, respectively, and the two ends of the push rod are rotatably connected to the other end of the central rod and the push tube, respectively. The movement of the central rod can drive the outer tube and the push tube to move in opposite directions to push the sealant out of the outer tube for release.

[0005] Furthermore, the vascular closure device also includes a support frame, which has cavities extending through its upper and lower side walls, and the connecting rod assembly passes through the cavity of the support frame and is movably connected to the support frame.

[0006] Furthermore, the left and / or right walls of the support frame are provided with a first and / or a second sliding groove along the longitudinal axis, the end of the push rod that is rotatably connected to the outer tube is slidably connected to the first sliding groove, and the end of the push rod that is rotatably connected to the push tube is slidably connected to the second sliding groove.

[0007] Furthermore, a center rod locking element is provided near the rotation center of the center rod; the left or right side wall of the support frame is also provided with a limiting hole and a rotating hole that communicate with each other; when the center rod locking element is located in the limiting hole, the center rod is locked and cannot rotate relative to the support frame; when the center rod locking element is moved to the rotating hole, the center rod is unlocked and can rotate relative to the support frame.

[0008] Furthermore, when the support frame moves to the distal end relative to the central rod, the central rod locking member can be transferred from the limiting hole to the rotating hole, and the central rod changes from a locked state to an unlocked state.

[0009] Furthermore, it also includes an inner tube, which is slidably disposed in the push tube, with an expandable element connected to the distal end of the inner tube, and the proximal end of the inner tube being fixedly connected to the support frame.

[0010] Furthermore, the vascular closure device further includes a first slider, through which the outer tube is rotatably connected to the end of the pull rod; and / or, it further includes a second slider, through which the push tube is rotatably connected to the end of the push rod.

[0011] Furthermore, the central rod is also provided with a central rod abutment; the support frame is also provided with a stop bar, and when the central rod rotates to the end of its stroke, the central rod abutment abuts against the stop bar to limit the position of the support frame.

[0012] Furthermore, the vascular closure device also includes a housing, the connecting rod assembly and the support frame are disposed within the housing, the support frame is slidably connected to the housing, and the central rod is rotatably connected to the housing.

[0013] Furthermore, the rotation center of the central rod is provided with a central rod connecting part, and the housing is provided with a housing connecting part, and the central rod connecting part is rotatably connected to the housing connecting part.

[0014] Furthermore, the vascular closure device also includes an elastic element, the proximal end of which abuts against the support frame and the distal end of which abuts against the housing.

[0015] Furthermore, the support frame is provided with a guide, and the housing is provided with two housing protrusions arranged laterally opposite each other. The distal end of the elastic member abuts against the housing protrusions, and the guide is slidably disposed between the two housing protrusions and can extend into the interior of the elastic member from between the two housing protrusions.

[0016] Furthermore, the inner wall of the housing is provided with an upper arc-shaped guide rail and / or a lower arc-shaped guide rail centered on the housing connection part of the housing. One end of the central rod is slidably connected to the upper arc-shaped guide rail, and / or the other end of the central rod is slidably connected to the lower arc-shaped guide rail.

[0017] Furthermore, a wedge-shaped protrusion is provided on the inner wall of the housing near the lower arc-shaped guide rail, and the thickness of the wedge-shaped protrusion gradually increases from the distal end to the proximal end; the wedge-shaped protrusion can squeeze the side wall of the central rod to limit its movement.

[0018] Furthermore, the wedge-shaped protrusion is arranged substantially parallel to the lower arc-shaped guide rail.

[0019] Furthermore, it also includes a wrench, which is rotatably connected to the housing connection portion of the housing in a first position and rotatably connected to the end of the central rod in a second position; the rotation of the wrench relative to the housing can drive the central rod to rotate.

[0020] Furthermore, the lower arc-shaped guide rail is an arc-shaped through groove; it also includes a wrench connecting pin, which is rotatably connected to the end of the central rod, and at least one of its free ends passes through the arc-shaped through groove and is connected to the wrench.

[0021] Furthermore, the vascular closure device also includes a button, the proximal end of which is rotatably connected to the housing. When the button is pressed, it compresses the inner tube, causing it to bend.

[0022] Furthermore, the distal end of the button is provided with a button hook having a gripping part, which can squeeze the inner tube.

[0023] Furthermore, the button hook is also provided with a button locking part; it also includes a second slider, the push tube is rotatably connected to the end of the push rod through the second slider, and a button locking member that cooperates with the button locking part is provided on the proximal side of the second slider.

[0024] Furthermore, the button is also provided with a button limiting component, and the support frame is provided with a support frame limiting component that cooperates with the button limiting component.

[0025] The technical solution of the present invention has the following beneficial effects:

[0026] 1. The delivery system of the present invention can realize semi-automatic release of the vascular puncture site without the assistance of imaging equipment such as ultrasound, DSA, CT and MRI. The tension component indicates whether the implanted device has reached the expected position of the puncture site.

[0027] 2. This invention employs a two-way linkage transmission mechanism, where the retraction of the outer tube and the forward push of the push tube are performed simultaneously, which can improve the deployment efficiency of the sealant and shorten the surgical process.

[0028] 3. This invention employs multiple locking devices to ensure the orderly execution of each step during the surgery, preventing accidental operation of subsequent steps when previous steps are not performed, thereby reducing errors during the surgery, simplifying the operation process, and ensuring the success rate of the surgery.

[0029] 4. The present invention sets up multiple travel limit mechanisms to limit and hold the corresponding operating parts, so that they are limited and held in the state when they are at the end of the travel, preventing unexpected events from occurring due to return. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the blood vessel closure device in the first embodiment;

[0031] Figure 2 This is an exploded structural diagram of the blood vessel closure device in the first embodiment;

[0032] Figure 3 This is a partial cross-sectional view of the distal side of the vascular closure device in the first embodiment;

[0033] Figure 4 This is a three-dimensional structural diagram of the shell in the first embodiment;

[0034] Figure 5 This is a three-dimensional structural diagram of the linkage assembly in the first embodiment;

[0035] Figure 6 This is a three-dimensional structural diagram of the button in the first embodiment;

[0036] Figure 7 This is a three-dimensional structural diagram of the support frame in the first embodiment;

[0037] Figure 8 This is an internal structural diagram of the blood vessel closure device in the first embodiment;

[0038] Figure 9 This is another internal structural diagram of the blood vessel closure device in the first embodiment;

[0039] Figure 10 This is a partial internal structural diagram of the vascular closure device in the first embodiment;

[0040] Figure 11 This is another partial internal structural diagram of the blood vessel closure device in the first embodiment;

[0041] Figure 12 This is another internal structural diagram of the blood vessel closure device in the first embodiment;

[0042] Figure 13 This is a three-dimensional structural diagram of the wrench in the first embodiment;

[0043] Figure 14a This is a cross-sectional view of the blood vessel closure device in the first embodiment;

[0044] Figure 14b Another cross-sectional view of the blood vessel closure device in the first embodiment;

[0045] Figure 15 This is a schematic diagram of the blood vessel closure device entering the blood vessel in the first embodiment; Detailed Implementation

[0046] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0047] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "upper," "lower," "left," "right," and similar expressions used to indicate orientation are for illustrative purposes only and do not represent the only possible implementation.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0049] It should be noted that, for a delivery system, the end of the delivery system that is relatively closer to the operator is generally called the "proximal end," and the end of the delivery system that is relatively farther from the operator is called the "distal end." Based on this principle, the "proximal end" and "distal end" of any component of the delivery system are defined. "Axial" or "longitudinal axis" refers to the direction parallel to the line connecting the center of the distal end and the center of the proximal end of the medical device. "Radial" or "transverse axis" refers to the direction perpendicular to the axial direction.

[0050] See Figure 1As shown, this embodiment provides a vascular closure device 1, suitable for the carotid and femoral arteries. It can close the vascular puncture site caused by a 5F-8F vascular sheath, shorten the hemostasis time, allow the patient to get out of bed and walk as soon as possible, improve patient comfort, and reduce the risk of manual compression. Specifically, the vascular closure device 1 includes a handle 100 and an outer tube 110 with its proximal end connected to the handle 100 and its distal end extending out of the handle 100. The outer tube 110 extends along the longitudinal axis X. The distal end of the handle 100 is connected to a connecting portion 50, and the distal end of the outer tube 110 extends out after passing through the connecting portion 50. In this embodiment, the connecting portion 50 is an elastic stress-relieving element, sleeved on the outer periphery of the outer tube 110, which can reduce the bending stress of the outer tube 110. The handle 110 includes a housing 10, a wrench 30 rotatably connected to the lower part of the housing 10, and a button 40 rotatably connected to the upper part of the housing 10. In addition, a three-way valve assembly 20 is also connected to the proximal side of the housing 10.

[0051] See Figure 2 The vascular closure device 1 is further described below. In this embodiment, the tube assembly includes an outer tube 110, a push tube 120, and an inner tube 130. The push tube 120 is slidably disposed within the lumen of the outer tube 110, and the inner tube 130 is slidably disposed within the lumen of the push tube 120, achieving a sequential nested connection from the outside in. An inner tube fixing member 80 is fixedly connected to the proximal end of the inner tube 130. For ease of assembly and installation, in this embodiment, the housing 10 is divided into two parts, comprising a first housing 11 and a second housing 12. Similarly, for ease of assembly and installation, in this embodiment, the support frame 60 is divided into two parts, comprising a first support frame 61 and a second support frame 62. The support frame 60 is slidably disposed within the housing 10 and elastically connected to the housing 10 via an elastic member 90. The three-way valve assembly 20 includes a flexible hose 21 and a three-way valve 22 communicating with the flexible hose 21. The distal end of the flexible hose 21 is connected to the inner tube 130 via the inner tube fixing member 80. In other embodiments, the flexible hose 21 can also be directly connected to the proximal end of the inner tube 130. A button 40 is rotatably connected to the upper side of the housing 10, and a wrench 30 is rotatably connected to the lower side of the housing 10. A cover plate 301 is provided on the wrench 30. A linkage assembly 70 is also provided in the housing 10, and the movement of the linkage assembly 70 can cause the outer tube 110 and the push tube 120 to move towards each other. In this embodiment, the movement towards each other refers to the movement of objects moving closer to each other.

[0052] See Figure 3The outer tube assembly is described below. The distal end of the inner tube 130 is connected to an expandable element 140. In an exemplary embodiment, the inner tube 130 is a balloon catheter and the expandable element 140 is a balloon, which may be a semi-compliant balloon. The expandable element 140 may also be other expandable components, such as a deformable expandable occlusion disc or occluder. A sealant 2 is filled at the distal end of the inner lumen of the outer tube 110. The sealant 2 is a biodegradable biomaterial that is released at the puncture site on the vessel wall through the vascular closure device 1. Upon contact with extravascular blood and tissue fluid, it expands and fixes itself at the puncture site. Simultaneously, the sealant material contains clotting factors, which can accelerate the healing of the vascular puncture site, achieving hemostasis and degrading within a short period.

[0053] In the initial state, the distal end of the push rod 120 is close to the sealant 2. In this embodiment, the distal end of the push rod is away from the sealant 2, that is, located at the proximal end of the sealant 2. A core wire 150 is also provided in the inner tube 130. After exiting the end of the inner tube 130, the core wire 150 continues to extend along the longitudinal axis, thereby passing through the expandable element 140. The core wire 150 is provided to support the inner tube 130 and the expandable element 140 to improve their structural strength. When the movement of the linkage assembly 70 causes the outer tube 110 and the push tube 120 to move towards each other, the end of the push tube 120 will squeeze the sealant 2, thereby releasing the sealant 2 from the outer tube 110.

[0054] See Figure 4The housing 10 is described below. Considering that the structures of the first housing 11 and the second housing 12 are largely the same, the second housing 12 is used as an example to illustrate the housing 10. The similarities between the first and second housings 12 will not be repeated, but the structural differences will be explained accordingly. The housing 10 extends along the longitudinal axis XX, and a housing connecting portion 106 is provided thereon. In this embodiment, the housing connecting portion 106 is a through hole penetrating the housing 10; in other embodiments, the housing connecting portion 106 may also be a protruding structure or have protrusions and grooves on both the inner and outer sides of the housing. Of course, it can also be other rotatable connection structures, such as bearings. Centered on the housing connecting portion 106, an upper arc-shaped guide rail 101 is provided on the upper side inside the housing 10, and a lower arc-shaped guide rail 102 is provided on the lower side. The extension trajectories of both the upper arc-shaped guide rail 101 and the lower arc-shaped guide rail 102 are arcs, and the center of these arcs coincides with the center of the housing connecting portion 106. In this embodiment, the upper arc-shaped guide rail 101 is formed by an arc-shaped protrusion on the inner wall of the housing 10, while the lower arc-shaped guide rail 102 is formed by an arc-shaped through hole penetrating both sides of the housing 10. In other embodiments, the upper arc-shaped guide rail 101 may also be formed by an arc-shaped through hole penetrating both sides of the housing 10, and the lower arc-shaped guide rail 102 may also be formed by an arc-shaped protrusion on the inner wall of the housing 10. Unlike the first housing 11, the inner wall of the second housing 12 in this embodiment is also provided with a wedge-shaped protrusion 121, the edge of which is flush with or at a certain distance from the edge of the lower arc-shaped guide rail 102. The wedge-shaped protrusion 121 extends in a direction that is substantially parallel to the central axis of the lower arc-shaped guide rail 122, that is, the wedge-shaped protrusion 121 is substantially parallel to the lower arc-shaped guide rail 122, and its thickness gradually increases from the proximal end to the distal end. In addition, a first limiting member 104 is provided on the proximal side of the inner wall of the housing 10. In this embodiment, the first limiting member 104 is a protrusion on both sides of the inner wall of the housing 10, and a first support member 107 is provided on the inner wall between the two opposing protrusions. A second limiting member 105 is provided on the distal side of the inner wall of the housing 10. In this embodiment, the second limiting member 105 is a protrusion on both sides of the inner wall of the housing 10, and a second support member 108 is provided on the inner wall between the two opposing protrusions. The first limiting member 104 and the second limiting member 105 are used to laterally limit the sidewalls of the support frame 60, while the first support member 107 and the second support member 108 are used to support the bottom wall of the support frame 60, thereby realizing the sliding connection between the support frame 60 and the housing 10. In addition, a display window 103 is provided on the distal side of the housing 10, and window scale lines (not shown in the figure) are provided around the display window 103.

[0055] See Figure 5The structure of the connecting rod assembly 70 is described below. The connecting rod assembly 70 includes a central rod 71 and a pull rod 72 and a push rod 73 rotatably connected to both ends of the central rod 71. The pull rod 72 is rotatably connected to a first slider 74, which serves as an outer tube fixing member. The push rod 73 is rotatably connected to a second slider 75, which serves as a push tube fixing member. In this embodiment, the rotatable connection structure can be achieved by inserting a pin after creating openings in the two rotatable connecting parts, or by providing rotatably connected protrusions and grooves on the two rotatable connecting parts, achieving the rotatable connection through the rotational engagement of the protrusions and grooves. Alternatively, it can be achieved using other methods such as bearings or ball joints. In this embodiment... Figure 5 The rotational connection method described herein is merely illustrative and does not represent a limitation on the rotational connection structure of this embodiment.

[0056] The central rod 71 includes a central rod body 711. A central rod connecting portion 713 is provided at the center of one or both sides of the central rod body 711 along its length direction, enabling a rotatable connection with the housing 10. In this embodiment, the central rod connecting portion 713 is configured as a rod-shaped protrusion extending along the horizontal axis AA, and the free end of the rod-shaped protrusion has an end through hole 714. The horizontal axis AA is the rotation center axis of the central rod 71, and the central rod 71 rotates around the horizontal axis AA. The horizontal axis AA extends laterally and is perpendicular to the longitudinal axis XX. In other embodiments, the central rod connecting portion 713 can also be a connecting hole structure, rotatably connected to the housing 10 via a rotating pin, or rotatably connected in conjunction with a protrusion structure provided on the housing 10. For the pull rod 72, one end is rotatably connected to one end of the central rod 71, and the other end is rotatably connected to the first slider 74. Similar to the pull rod 72, the push rod 73 has one end rotatably connected to the other end of the central rod 71, and the other end rotatably connected to the second slider 75. In this embodiment, the rotatable connection is achieved by inserting a pin after setting an opening at the end of the rod. For example, a pin is used to achieve the rotatable connection between the central rod 71 and the pull rod 73, and the end of the pin protrudes outward from the central rod 713 and / or the pull rod 73. The protruding end of the pin constitutes the first connecting rod limiting member 717. Of course, in other embodiments, the end of the pin may not protrude outward (the end is flush with the side wall of the rod or is set inside the opening of the rod), and a protruding structure is provided on the side of the central rod 71 and / or the pull rod 73, which is coaxial with the rotation center axis of the two (the relative rotation center axis of the central rod 71 and the pull rod 73). This protruding structure can also constitute the first connecting rod limiting member 717. In addition, the first connecting rod limiting member 717 can also be formed in the form of a groove. A second connecting rod protrusion 718 is also provided at the rotational connection between the central rod 71 and the push rod 72. In this embodiment, the second connecting rod limiting member 718 is a protrusion structure located on the side of the central rod 71 and / or the push rod 72, coaxial with the rotational center axis of both. Of course, in other embodiments, the same or similar structure as the first connecting rod limiting member 717 can also be used, which will not be described in detail here. A central rod locking member 712 is also provided near the central rod connecting portion 713 of the central rod 71. In this embodiment, the central rod locking member 712 is a square structure and is fixedly provided on the outer periphery of the central rod connecting portion 713. In addition, the central rod locking member 712 can also be other structures, such as a non-rotating structure such as a triangular block or a polygonal block, and can be directly provided on the rod body 711. A central rod abutment member 716 is also provided on the side wall of the central rod body 711 near the end close to the first connecting rod limiting member 717. The center rod abutment 716 is a protruding structure, extending perpendicularly to the horizontal axis AA, and forming an angle of less than 90 degrees with the length direction of the center rod 71. At the center of the center rod 71, a center rod through hole 715 extending along the longitudinal axis XX and passing through the center rod 71 is also provided.The through hole 715 allows the inner tube 130 to pass through the center rod 71 along the longitudinal axis.

[0057] See also Figure 5 As shown, the pull rod 72 is rotatably connected to the first slider 74, and a first connecting rod output limiting member 741 is provided on the side wall of the pull rod 72 and / or the first slider 74; the push rod 73 is rotatably connected to the second slider 75, and a second connecting rod output limiting member 751 is provided on the side wall of the push rod 73 and / or the second slider 75. In this embodiment, the first connecting rod output limiting member 741 and the second connecting rod output limiting member 751 are formed by the free end of the pin. In other embodiments, a protruding structure similar to the second connecting rod limiting member 718 can also be used, or a groove structure can be used. In addition, a button locking member 752 extending along the longitudinal axis XX is also provided on the second slider 75. The button locking member 752 is a strip-shaped protruding structure extending towards the proximal end along the longitudinal axis XX. Alternatively, the button locking member 752 can also be set as a groove structure.

[0058] The first slider 74 is fitted around the outer circumference of the outer tube 110 to achieve a fixed connection between the two. The second slider 75 is fitted around the outer circumference of the push tube 120 to achieve a fixed connection between the two. The proximal end of the inner tube 130 extends out of the push tube 120 and is fixedly connected to the inner tube fixing member 80. When the central rod 71 rotates around the horizontal axis AA in the CC direction, under the action of the central rod 71, the pull rod 72 pulls the first slider 74, causing the outer tube 110 to move towards the proximal end along the longitudinal axis XX. Meanwhile, the push rod 73 pushes the second slider 75, causing the inner tube 120 to move towards the distal end along the longitudinal axis XX, thereby realizing the opposite movement of the outer tube 110 and the push tube 120.

[0059] In other embodiments, the first slider 74 and the second slider 75 may be omitted, and the pull rod 72 may be directly rotatably connected to the outer tube 110, and the push rod 73 may be directly rotatably connected to the push tube 74. For example, a pin may be fixed to the outer circumference of the outer tube 110 or the push tube 74, and the pin may be directly connected to the pull rod 72 or the push tube 74. The first slider 74 and the second slider 75 are provided as intermediate connecting parts to realize the rotatable connection between the pull rod 72 and the outer tube 110 and the rotatable connection between the push tube 74 and the push rod 73. In addition, the first slider 74 and the second slider 75 also serve as motion output sliders of the linkage assembly 70 to convert the rotational motion of the central rod 71 into linear motion. When the outer tube 110 and the push tube 120 are present, since the outer tube 110 itself slides relative to the push tube 120, the first slider 74 and the second slider 75 can be omitted.

[0060] See Figure 6The structure of button 40 is described below. Button 40 includes a button body 41 and a button hook 42 disposed at the distal end of button body 41. A button connector 411 is disposed on the outer wall of the proximal side of button body 41, through which a rotatable connection is achieved with the inner wall of housing 10. In addition, a button limiting member 412 is also disposed on the outer wall of the distal side of button body 41. Exemplarily, in this embodiment, the button limiting member 412 is a groove structure disposed on one or both sides of the outer side of button body. Button hook 42 is formed by bending a strip structure, and a gripping part 422 is disposed at its bottom. In this embodiment, gripping part 422 is formed by a bottom groove, but it can also be formed by other structures, such as a hook structure or a protrusion structure at the bottom position, as long as the gripping part 422 can grip the inner tube. At approximately the middle position of button hook 42, a button locking part 421 extending laterally is also disposed. In this embodiment, the button locking part 421 is formed by providing an opening groove on the side wall of the button hook part 42. Of course, in other embodiments, the button locking part 421 can also be formed by other structures, such as a protruding structure, or a rod-shaped part with an opening provided on the wall of the button locking part 421 and extending along the longitudinal axis. The structure of the button locking part 421 is not specifically limited, as long as it can restrict the rotation of the button 40 relative to the housing 10 to achieve locking.

[0061] See Figure 7The structure of the support frame 60 is described below. The support frame 60 includes a support frame body 61 that extends integrally along the longitudinal axis, and the support frame body 61 has an inner cavity, the upper and lower ends of which communicate with the outside. A connecting rod assembly 70 is movably installed in the inner cavity of the support frame 60. The support frame 60 provides support and limits for the connecting rod assembly 70, while the support frame 60 itself is slidably installed in the housing 10 and can move relative to the housing 10 along the longitudinal axis. An elastic element mounting portion 613 is provided on the proximal side of the support frame body 61. In this embodiment, the elastic element mounting portion 613 is a protruding structure with an inner cavity. A guide member 62 is attached to the distal side of the elastic element mounting portion 613 and is disposed opposite to the elastic mounting portion 61. One end of the guide member 62 is fixed to the support frame body 61, and the other end extends along the longitudinal axis in a direction close to the elastic mounting portion 613 (proximal side). An indicator block 611 is provided on the distal side of the support frame body 61, and a scale line 612 is provided on the indicator block. The indicator block 611 and scale line 612 are provided to indicate the relative position of the support frame 60 relative to the housing 10, thereby determining their relative sliding distance. A laterally extending abutment 610 is also provided on the support frame body 61, which can abut against the central rod abutment 716 to limit the position of the support frame 60. Additionally, a first slide rail 68 and a second slide rail 69, spaced apart from each other and extending along the longitudinal axis, are provided on one or both sides of the support frame body 61. The first slide rail 68 limits the first connecting rod output limiting member 741, allowing it to move along the first slide rail 68 in the longitudinal direction. The second slide rail 69 limits the second connecting rod output limiting member 751, allowing it to move along the second slide rail 69 in the longitudinal direction. Exemplarily, the first slide rail 68 and the second slide rail 69 are longitudinally extending groove structures provided on one or both sides of the support frame body 61. Alternatively, the first slide rail 68 and the second slide rail 69 can also be protruding structures extending along the longitudinal axis, as long as they can form slide rails for the first link output limiting member 741 and the second link output limiting member 751 to guide their movement in a linear direction. Additionally, a rotating hole 67 and a limiting hole 66 are sequentially provided on the distal side of the second slide rail. The cross-sectional shape of the limiting hole 66 matches that of the center rod locking member 712, which can be embedded in the limiting hole 66. The center rod locking member 712 can move along the longitudinal axis but cannot rotate within the limiting hole 66, thereby locking the center rod 71. In this locked state, the center rod 71 cannot rotate around the transverse axis AA. The rotating hole 67 communicates with the limiting hole 66, and its cross-sectional area is larger than that of the center rod locking member 712 to ensure that it can rotate within the rotating hole 67. When the center rod locking member 712 slides from the limiting hole 66 to the rotating hole 67 along the longitudinal axis, the center rod 71 changes from the locked state to the unlocked state. In the unlocked state, the center rod can rotate around the horizontal axis AA.Near the guide member 62, a first cavity 63 and a second cavity 615 are provided on the frame body 61. An abutment groove 64 is provided on the distal wall of the first cavity 63. The abutment groove 64 is approximately located at the lateral center of the frame body 61, and it is used for the inner tube 130 to pass through and to support the inner tube 130, thereby cooperating with the button 40. Under the pressure of the button 40, the inner tube 130 bends. On the inner wall of the second cavity 615, a support frame limiting member 65 is provided, which cooperates with the button limiting member 412. In this embodiment, the support frame limiting member 65 is a conical protrusion structure that can elastically deform.

[0062] See Figure 8 As shown, the assembly relationship between the support frame 60, the housing 10 (taking housing 11 as an example), and the connecting rod assembly 70 in this embodiment will be explained. The support frame 60 is slidably mounted in the first housing 11, at which time the guide 62 is embedded in the guide rail located on the inner wall of the first housing 11. In this embodiment, the guide rail is composed of two housing protrusions 111 disposed opposite to each other on the inner wall of the first housing 11, and the gap between the two housing protrusions 111 forms the guide rail. The rod-shaped guide 62 can slide in the guide rail. One end of the elastic member 90 abuts against the elastic member mounting part 613, and the other end abuts against the housing protrusion 111. In addition, the guide 62 can extend into the interior of the elastic member 90. In this embodiment, the elastic member 90 is a helical columnar spring. Alternatively, the elastic member can also be a conical spring or other elastic structures such as an elastic rod. When the support frame 60 is slid distally relative to the first housing 11, the elastic element 90 is compressed as the elastic element mounting portion 613 moves. The guide 62 serves two purposes: firstly, it guides the support frame 60; during the compression of the elastic element, the guide 62 remains within the guide rail, ensuring that the elastic element mounting portion 613 moves axially, thus ensuring that the elastic element 90 is compressed or recovers along the longitudinal axis, preventing the elastic element 90 from shifting during deformation. Secondly, the guide 62 extends into the elastic element 90, limiting its position and preventing the end of the elastic element 90 from detaching from the housing protrusion 111 due to lateral sliding relative to it. The indicator block 611 is located near the display window 103 and can be observed through the display window 103. When the support frame 60 moves until the window scale line aligns with the scale line on the indicator block 62, it indicates that the support frame 60 has moved to the predetermined position.

[0063] See also Figure 8As shown, in the initial state, the center rod locking member 712 is located in the limiting hole 66, and the center rod 71 is in a locked state. When the support frame 60 is pulled to the distal end by an external force, the housing 10 and the center rod 71 are relatively stationary. The support frame 60 overcomes the elastic restoring force of the elastic member 90 and moves to the distal end relative to the center rod 71, thereby causing the center rod locking member 712 to move into the rotating hole 67. At this time, the lock on the center rod 71 is released, and it can rotate relative to the housing 10 about the horizontal axis AA. Therefore, in this embodiment, the linkage assembly 70 can be unlocked by moving the support frame 60 to the proximal end. In addition, the first link output limiting member 741, which is set on the first slider, is limited in the first slide rail 68, and the second link output limiting member 751, which is set on the inner tube fixing member, is limited in the second slide rail 68. Thus, when the center rod 71 rotates around the horizontal axis, under the force transmission of the pull rod 72 and the push rod 73, the first link output limiting member 741 and the second link output limiting member 751 are ensured to move linearly along the vertical axis.

[0064] See Figure 9 As shown, the inner tube 130 is fixed to the inner tube fixing member 80, which is fixedly installed in the support frame 60, thereby achieving a fixed connection between the distal end of the inner tube 130 and the support frame 60. Therefore, when the inner tube 130 is pulled distally, the tension acting on the inner tube 130 will drive the support frame 60 to move distally, thereby unlocking the linkage assembly 70. In addition, the first linkage limiting member 717 is limited in the upper arc-shaped guide rail 102, and the second linkage limiting member 718 is limited in the lower arc-shaped guide rail 103, thereby ensuring that during the rotation of the central rod 71 around the horizontal axis, the end of the central rod 71 connected to the pull rod 72 slides along the lower arc-shaped guide rail 103, and the end of the central rod connected to the push rod 73 slides along the upper arc-shaped guide rail 102. The function of the upper arc-shaped guide rail 102 and the lower arc-shaped guide rail 103 is to limit the movement trajectory at the end of the central rod 71, so as to ensure the stability of the movement process of the connecting rod assembly 70 and prevent the rotational connection between the central rod 71 and the push rod 72 or the pull rod 73 from failing due to the bias force, thus preventing relative rotation.

[0065] See Figure 10 As shown, button 40 is rotatably mounted on housing 10 via button connector 411, allowing button 40 to rotate relative to housing 10 about the central axis of connector 411. In the initial state (before being pressed), the gripping portion 422 of button 40 abuts against inner tube 130, preventing button 40 from rotating relative to housing 10 due to gravity. Furthermore, before the central rod 71 rotates, the push rod fixing member 75 approaches the button hook portion 42, at which time the button locking member 752 engages with the button locking portion 421. For example, as... Figure 10As shown, the button locking member 752 is inserted into the button locking part 421, which has an open groove structure, thereby preventing the button 40 from rotating relative to the housing 10. At this time, the button 40 is in a locked state. When the center rod 71 rotates around the CC direction, the push rod fixing member 75 will gradually move away from the button 40, thereby separating the button locking member 752 from the button locking part 421, thus unlocking the button 40. At this time, when the button 40 is pressed, the button 40 rotates relative to the housing 10, and the gripping part 422 will press the inner tube 422 downward. Since the inner tube 422 is against the support frame 60 and receives the upward support force of the support frame 60, when the inner tube 130 is subjected to the downward pressing force from the button hook part 42, the inner tube 422 will bend and enter the first cavity 63 along with the button hook part 42 when it is simultaneously subjected to the upward support force and the downward pressing force (the two points of application are offset in the longitudinal axis direction and do not coincide). At the same time, the button body 41 will enter the second cavity 615. After the inner tube 422 bends, its length along the longitudinal axis shortens, and the distal end of the inner tube 411 retracts into the outer tube 110, thereby causing the expandable element 140 to retract into the outer tube 110. Additionally, during the process of the button body 41 entering the second cavity 615, the button limiting member 412 cooperates with the support frame limiting member 65. Thus, at the end of the pressing stroke, the support frame limiting member 65 limits the button limiting part 421, thereby locking the button 40 and preventing the button 40 from rebounding after the pressing stroke ends. In this example, the support frame limiting member 65 is a conical protrusion structure, and the button limiting member 421 is a conical hole structure. The support frame limiting member 65 is inserted into the button limiting member 412 to limit the button 40.

[0066] See Figure 11 The diagram shows the relative positions of the central rod 71, pull rod 72, push rod 73, first slider 74, and second slider 75 after the central rod 71 has rotated a certain angle. It can be seen that as the central rod 71 rotates, the first slider 74 and the second slider 75 move towards each other (approaching each other), causing the outer tube 110 to move towards the proximal end while the push tube 120 moves towards the distal end, thus forming a bidirectional linkage transmission. Compared to unidirectional transmission (where only the outer tube 110 or the push tube 120 moves), this bidirectional transmission significantly improves the efficiency of pushing the sealant 2. The push tube 120 can efficiently squeeze the sealant 2 out of the outer tube 110, achieving rapid release of the sealant. Furthermore, from... Figure 11As can be seen, at this time, the button locking member 752 is away from the button hook 42, thereby releasing the button locking member 752 from locking the button 40 and unlocking the button 40. In addition, when the rotation stroke of the center rod 71 ends, the center rod abutment member 716 will abut against the abutment rod 610 to overcome the elastic restoring force of the elastic member 90, restricting the support frame 60 from moving towards the proximal end, and preventing the support frame 60 from returning to the proximal end after the tension of the inner tube 130 disappears due to the elastic restoring force of the elastic member 90.

[0067] See Figure 12 As shown, when the end of the center rod 71 slides along the lower arc-shaped guide rail 102, the side wall of the center rod 71 approaches and presses against the wedge-shaped protrusion 121. Since the thickness of the wedge-shaped protrusion 121 increases from the distal end to the proximal end of the assembly, the pressing force between the side wall of the center rod 71 and the wedge-shaped protrusion 121 gradually increases during the rotation of the center rod 71, reaching its maximum after the rotation stroke of the center rod 71 ends. This effectively limits the center rod 71 and prevents it from continuing to move after the stroke ends.

[0068] See Figure 13 The structure of the wrench 30 is described below. The wrench 30 has a wrench connecting part 31 at a first position, and a wrench connecting hole 32 at a second position on the inner wall of the wrench 30. Additionally, a wrench through hole 33 communicating with the wrench connecting hole 32 is provided on the outer wall of the wrench 30. In this embodiment, a pin can be inserted into the pin connecting hole 32 from the wrench through hole 33, and a cover plate 301 (see...) is used. Figure 2 The through hole 33 of the wrench is sealed to axially limit the pin and prevent it from loosening.

[0069] See Figures 14a-14b The installation method of the wrench 30 is explained as shown.

[0070] On the one hand, see Figure 14a As shown, the wrench 30 is rotatably connected to the housing connection 106 via the wrench connecting part 31. This rotatable connection can be achieved using a protrusion-groove structure or a pin connection. In this embodiment, the housing connection 106 is configured as a through hole, and both ends of the central rod connecting part 713 are directly inserted into the housing connection 106 to achieve a rotatable connection with the housing 10. The protruding wrench connecting part 31 extends directly into the end through hole 714 of the central rod connecting part 713, thus achieving a stable rotatable connection with the housing 10. Of course, in other embodiments, the wrench connecting part 31 may only be connected to the housing connection 106 and does not need to be connected to the central rod connecting part 713.

[0071] On the other hand, see Figure 14bAs shown, the wrench 30 is rotatably connected to one end of the central rod 71 via a wrench connecting pin 34. Specifically, in this embodiment, the wrench connecting pin 34 is simultaneously inserted into both the central rod 71 and the pull rod 72 to achieve a rotatable connection between them. That is, the wrench connecting pin 34 serves as a rotatable connecting shaft between the central rod and the pull rod 72. Additionally, the free ends of the wrench connecting pin 34 extending from one or both ends of the central rod 71 and the pull rod 72 are connected to the wrench connecting hole 32. Specifically, in this embodiment, the wrench connecting pin 34 enters the wrench 30 from the side with the wrench through hole 33, passes through the pin connecting hole 32 on one side, and then sequentially passes through the central rod 71 and the pull rod 72 to reach the pin connecting hole 32 on the other side. The wrench through hole 33 is blocked by a cover plate 301 to axially limit the wrench connecting pin 34 and prevent it from disengaging from the wrench 30. The wrench connecting pin 34 passes through the ends of the central rod 71 and the pull rod 72 to achieve a rotatable connection between them. Simultaneously, the two free ends of the wrench connecting pin 34 are connected to the pin connection holes 32 located on both sides. When the wrench 30 is rotated, it rotates relative to the housing 10 around the location of the wrench connecting part 31. This rotation causes the connected wrench connecting pin 34 to swing, and the swinging of the wrench connecting pin 34 provides power to the rotation of the central rod 71, thereby driving the central rod 71 to rotate. Therefore, in this embodiment, rotating the wrench 30 provides torque to the central rod 71, thus providing power for the movement of the connecting rod assembly 70. In this embodiment, the wrench 30 is rotatably connected to the lower end of the central rod 71 (the end connected to the pull rod 72). Alternatively, the wrench 30 can also be rotatably connected to the upper end of the central rod 71 (the end connected to the push rod 73), in which case the wrench connecting pin 34 can achieve a rotatable connection between the central rod 71 and the push rod 73. Since any force applied to the end of the central rod 71 can be converted into a rotational torque, causing the central rod 71 to rotate, the wrench 30 can be rotatably connected to either end of the central rod 71. In this embodiment, on the one hand, the wrench connecting part 31 of the wrench 30 and the connecting part of the central rod 71 are coaxially arranged, so that the wrench 30 and the central rod 71 rotate around a common central axis; on the other hand, the wrench connecting pin 34 constitutes the rotational connecting shaft between the central rod 71 and the pull rod 72 or the push rod 73, that is, the wrench connecting pin 34 is coaxially arranged with the central axis of relative rotation between the central rod 71 and the pull rod 72 or the central rod 71 and the push rod 73, thereby ensuring that the rotation of the wrench 30 relative to the housing 10 can drive the central rod 71 to rotate, providing power to the connecting rod assembly 70.

[0072] The following is an auxiliary description of the entire operation process of the vascular closure device 1. Figure 15 The operation process mainly includes the following steps.

[0073] Step 1: Vascular intervention

[0074] Before the vascular closure device 1 enters the blood vessel 3, see Figure 2 As shown, at this time, the sealant 2 is loaded into the inner cavity of the outer tube 110, and the distal end of the push tube 120 is close to the sealant 2 and located inside the outer tube 110. The distal end of the inner tube 130 extends out from inside the outer tube 110, and the expandable element 140 is in an unfilled, expanded state. The tube assembly and the expandable element 140 are delivered into the blood vessel through the vascular delivery sheath, and the direction of the handle 100 is adjusted so that the tension indication display window 123 on the handle 100 faces upwards for easy observation later. During this stage, the linkage assembly 70 is locked and cannot be moved by the wrench 30. The button 40 is also locked and cannot be pressed. Locking both the linkage assembly 70 and the button 40 simultaneously at this stage prevents premature execution of related actions due to accidental operation.

[0075] Step 2: Anchoring of expandable elements

[0076] Connect the pressure pump to the three-way valve and inject liquid or gas into the expandable element 140 through the inner tube 130, causing the expandable element 140 to expand to the desired state. After the expandable element 140 expands, adjust the direction of the handle 100 so that its longitudinal axis is aligned with the direction of blood vessel puncture and approximately 45 degrees to the axial direction of the blood vessel at the puncture site 31, and then withdraw the handle 100. During the withdrawal movement, the distal end of the inner tube 130 inside the blood vessel 3 will be subjected to a pulling force towards the distal end due to resistance. This pulling force causes tension in the inner tube 130, which overcomes the elastic restoring force of the elastic element 90, causing the support frame 60 to move distally. As the handle 100 continues to retract, the expandable element 140, in its expanded state, abuts against the inner wall of the vascular puncture site 31, at which point the tension increases. During the retraction process, the position of the scale line 611 on the support frame 60 is observed through the display window 123 until the scale line 611 is aligned with the scale line on the window, indicating that the expandable element 140 has reached the anchoring position and is anchored at the puncture site 31. At this time, due to the distal movement of the support frame 60, the linkage assembly 71 changes from the previous locked state to the unlocked state.

[0077] Step 3: Release of sealing material

[0078] Keep the handle stationary to ensure the anchoring of the expandable element and maintain tension on the inner tube 130. Activate the wrench 30 until it reaches its end stroke, releasing the sealing material 2 at the vascular puncture site 31. As the wrench rotates, it initiates the stroke of the linkage assembly 70, causing the central rod 71 to rotate and drive the outer tube 110 and the push tube 120 in opposite directions. Because this embodiment employs a bidirectional linkage transmission device, during this process, the retraction of the outer tube 110 proximally exposes the sealing material 2 within it, while the push tube 120's distal advancement compresses the sealing material 2, pushing it out of the outer tube 110. These exposure and push-out actions occur simultaneously, simultaneously releasing and compressing the sealing material 2, accelerating its deployment efficiency and improving hemostasis. When the wrench 30 reaches its end stroke, the linkage assembly 70 also reaches its end point. At this time, on the one hand, the wedge-shaped protrusion 121 on the inner wall of the housing 10 will limit the center rod 71, keeping the center rod 71 in its current position and preventing the center rod 71 from continuing to rotate, that is, limiting and holding the connecting rod assembly 70; on the other hand, the center rod abutment 716 on the center rod 71 will abut against the abutment 610 on the support frame 60 to overcome the elastic restoring force of the elastic member 90 and prevent the support frame 60 from returning to the proximal end, that is, limiting and holding the support frame 60; finally, the button locking member 752 provided on the push tube limiting member 75 separates from the button 40, releasing the lock on the button 40, at which time the button 40 is in the unlocked state;

[0079] Step 4: Recycling of expandable components

[0080] Connect the three-way valve to the screw-type syringe. Open the three-way valve, and the syringe will retract, drawing the expandable element 140 into a vacuum state, causing it to collapse. Ensure the handle 100 is oriented so that its longitudinal axis is aligned with the vascular puncture direction and approximately 45 degrees to the vascular axis at the puncture site 31. Press the button 40, causing the inner tube 130 to bend, thereby retracting the expandable element 140 into the outer tube 110. When the button 40 is pressed to its end point, the button limiting member 412 engages with the support frame limiting member 65 to limit the button 40, preventing it from rebounding at the end of its stroke.

[0081] Step 5: Remove the vascular closure device

[0082] The vascular closure device 1 is withdrawn proximally until the outer tube 110 is completely withdrawn, thus completing the closure operation of the vascular puncture site 31.

[0083] Therefore, this embodiment, by setting up multiple locking devices, ensures the orderly execution of the above steps, prevents accidental operation of subsequent steps when previous steps are not performed, thereby reducing errors during the surgical process, simplifying the operation procedure, and ensuring the success rate of the surgery. Furthermore, when each step reaches its end point, a limit mechanism is set up to limit the corresponding operating component, keeping it at the end point position and preventing unexpected events due to return to its original position.

[0084] Specifically, the tension in the inner tube 130 causes the support frame 60 to move, which unlocks the linkage assembly 70, while the button 40 remains locked. The trigger 30 actuates the linkage assembly 70, and when the trigger 30 reaches its end-of-stroke position, the linkage assembly 70 also reaches its end-of-stroke position. At this point, both the linkage assembly 70 and the support frame 60 are limited to their end-of-stroke positions (limited holding), while the button 40 is unlocked. The button 40 is also limited to its end-of-stroke position after actuation. Through the coordination of these components, the entire surgical procedure is operated in an orderly manner, reducing errors and preventing unexpected events.

[0085] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. The scope of protection of this patent should be determined by the appended claims.

Claims

1. A vascular closure device, characterized in that, include: The outer tube extends along the longitudinal axis; A sealant disposed on the distal side of the outer tube; A push tube, which is slidably disposed inside the outer tube, with its distal end close to the sealant; The linkage assembly includes a central rod, a pull rod, and a push rod. The two ends of the pull rod are rotatably connected to one end of the central rod and the outer tube, respectively. The two ends of the push rod are rotatably connected to the other end of the central rod and the push tube, respectively. The movement of the central rod can drive the outer tube and the push tube to move in opposite directions to push the sealant out of the outer tube for release.

2. The vascular closure device according to claim 1, characterized in that, The vascular closure device also includes a support frame, which has cavities extending through its upper and lower side walls. The connecting rod assembly passes through the cavity of the support frame and is movably connected to the support frame.

3. The vascular closure device according to claim 2, characterized in that, The left and / or right walls of the support frame are provided with a first and / or a second sliding groove along the longitudinal axis. The end of the push rod that is rotatably connected to the outer tube is slidably connected to the first sliding groove, and the end of the push rod that is rotatably connected to the push tube is slidably connected to the second sliding groove.

4. The vascular closure device according to claim 2, characterized in that, A center rod locking element is also provided near the rotation center of the center rod; the left or right side wall of the support frame is also provided with a limiting hole and a rotating hole that communicate with each other; when the center rod locking element is located in the limiting hole, the center rod is locked and cannot rotate relative to the support frame; when the center rod locking element is moved to the rotating hole, the center rod is unlocked and can rotate relative to the support frame.

5. The vascular closure device according to claim 4, characterized in that, When the support frame moves to the distal end relative to the center rod, the center rod locking member can be transferred from the limiting hole to the rotating hole, and the center rod changes from the locked state to the unlocked state.

6. The vascular closure device according to claim 2, characterized in that, It also includes an inner tube, which is slidably disposed in the push tube. The distal end of the inner tube is connected to an expandable element, and the proximal end of the inner tube is fixedly connected to the support frame.

7. The vascular closure device according to claim 1, characterized in that, The vascular closure device further includes a first slider, through which the outer tube is rotatably connected to the end of the pull rod; and / or, it further includes a second slider, through which the push tube is rotatably connected to the end of the push rod.

8. The vascular closure device according to claim 2, characterized in that, The central rod is also provided with a central rod abutment; the support frame is also provided with a stop bar. When the central rod rotates to the end of its stroke, the central rod abutment abuts against the stop bar to limit the position of the support frame.

9. The vascular closure device according to claim 6, characterized in that, The vascular closure device further includes a housing, the connecting rod assembly and the support frame are disposed within the housing, the support frame is slidably connected to the housing, and the central rod is rotatably connected to the housing.

10. The vascular closure device according to claim 9, characterized in that, The rotation center of the central rod is provided with a central rod connecting part, and the housing is provided with a housing connecting part, and the central rod connecting part and the housing connecting part are rotatably connected.

11. The vascular closure device according to claim 9, characterized in that, The vascular closure device also includes an elastic element, the proximal end of which abuts against the support frame and the distal end of which abuts against the housing.

12. The vascular closure device according to claim 11, characterized in that, The support frame is provided with a guide, and the housing is provided with two housing protrusions arranged laterally opposite each other. The distal end of the elastic member abuts against the housing protrusions. The guide is slidably disposed between the two housing protrusions and can extend into the interior of the elastic member from between the two housing protrusions.

13. The vascular closure device according to claim 9, characterized in that, The inner wall of the housing is provided with an upper arc-shaped guide rail and / or a lower arc-shaped guide rail centered on the housing connection part of the housing. One end of the central rod is slidably connected to the upper arc-shaped guide rail, and / or the other end of the central rod is slidably connected to the lower arc-shaped guide rail.

14. The vascular closure device according to claim 13, characterized in that, The inner wall of the housing is also provided with a wedge-shaped protrusion near the lower arc-shaped guide rail. The thickness of the wedge-shaped protrusion gradually increases from the far end to the near end. The wedge-shaped protrusion can squeeze the side wall of the central rod to limit its movement.

15. The vascular closure device according to claim 14, characterized in that, The wedge-shaped protrusion is arranged substantially parallel to the lower arc-shaped guide rail.

16. The vascular closure device according to claim 13, characterized in that, It also includes a wrench, which is rotatably connected to the housing connection portion of the housing in a first position and rotatably connected to the end of the central rod in a second position; the rotation of the wrench relative to the housing can drive the central rod to rotate.

17. The vascular closure device according to claim 16, characterized in that, The lower arc-shaped guide rail is an arc-shaped through groove; it also includes a wrench connecting pin, which is rotatably connected to the end of the central rod, and at least one of its free ends passes through the arc-shaped through groove and is connected to the wrench.

18. The vascular closure device according to claim 9, characterized in that, The vascular closure device also includes a button, the proximal side of which is rotatably connected to the housing. When the button is pressed, it compresses the inner tube and causes it to bend.

19. The vascular closure device according to claim 18, characterized in that, The button has a button hook with a gripping part at its distal end, which can squeeze the inner tube.

20. The vascular closure device according to claim 19, characterized in that, The button hook is also provided with a button locking part; it also includes a second slider, the push tube is rotatably connected to the end of the push rod through the second slider, and a button locking member that cooperates with the button locking part is provided on the proximal side of the second slider.

21. The vascular closure device according to claim 18, characterized in that, The button is also provided with a button limiting component, and the support frame is provided with a support frame limiting component that cooperates with the button limiting component.

Images