Vascular closure device

Abstract

The present invention relates to a vascular closure device, comprising: an outer tube, which extends along a longitudinal axis; a sealant, which is arranged on a distal side in the outer tube; a push tube, which is slidably arranged in the outer tube, a distal side of the push tube being close to the sealant; a connecting rod assembly, which comprises a central rod, a pull rod and a push rod, wherein two end portions of the pull rod are respectively rotatably connected to one end of the central rod and the outer tube, and two end portions of the push rod are respectively rotatably connected to the other end of the central rod and the push tube; and the movement of the central rod can drive the outer tube and the push tube to move towards each other so as to push the sealant out of the outer tube to release the sealant. The vascular closure device is simple to operate and has a good hemostatic effect.

Description

Vascular closure device TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a vascular closure device. BACKGROUND

[0002] Interventional therapy is to establish a channel by using a puncture needle under the guidance of a medical imaging device, and to introduce a specially designed catheter, guide wire and other precision instruments into the human body through a vascular puncture port (puncture hole) to diagnose and locally treat the pathological state in the body. After the completion of the interventional operation, the vascular puncture port needs to be closed and hemostasis.

[0003] The commonly used methods for hemostasis of the puncture port after the interventional operation at present include manual compression hemostasis method, mechanical compression hemostasis method and the like. However, the above methods have the problems of long compression time, poor hemostasis effect, and complications such as bleeding, oozing of blood, hematoma and the like. At present, there are vascular closure devices specially used for hemostasis, but the existing vascular closure devices have the problems of complicated operation, high requirement for the proficiency of the operator, and the need for repeated switching of different instruments to complete the positioning and closing of the puncture port. SUMMARY

[0004] Therefore, it is necessary to provide a vascular closure device aiming at the problems of complicated operation and poor hemostasis effect in the closing process of the existing vascular closure device. The vascular closure device comprises an outer tube extending along a longitudinal axis, a sealant arranged on the distal end side in the outer tube, a push tube slidingly arranged in the outer tube, with the distal end side close to the sealant, a connecting rod assembly comprising a center rod, a pull rod and a push rod, both ends of the pull rod being rotatably connected with one end of the center rod and the outer tube respectively, both ends of the push rod being rotatably connected with the other end of the center rod and the push tube respectively, and the movement of the center rod can drive the outer tube and the push tube to move towards each other to push the sealant out of the outer tube to release.

[0005] Further, the vascular closure device further comprises a support frame provided with a cavity penetrating through the upper and lower side walls thereof, and the connecting rod assembly is arranged in the cavity of the support frame and is movably connected with the support frame.

[0006] Further, the left side wall and / or the right side wall of the support frame is provided with a first sliding groove and / or a second sliding groove along the longitudinal axis, the end of the push rod rotatably connected with the outer tube is slidingly connected with the first sliding groove, and the end of the push rod rotatably connected with the push tube is slidingly connected with the second sliding groove.

[0007] Further, a rotation center of the center rod is provided with a center rod locking member; a left side wall or a right side wall of the support frame is further provided with a limiting hole and a rotation hole which are in communication with each other; when the center rod locking member is located in the limiting hole, the center rod is locked and cannot rotate relative to the support frame; when the center rod locking member is shifted to the rotation hole, the center rod is unlocked and can rotate relative to the support frame.

[0008] Further, when the support frame moves distally relative to the center rod, the center rod locking member can be shifted from the limiting hole to the rotation hole, and the center rod changes from the locked state to the unlocked state.

[0009] Further, an inner tube is slidingly arranged in the push tube, a distal end of the inner tube is in communication with an expandable element, and a proximal end of the inner tube is fixedly connected with the support frame.

[0010] Further, the blood vessel closure device further comprises a first sliding block, the outer tube is rotationally connected with an end of the pull rod through the first sliding block; and / or further comprises a second sliding block, the push tube is rotationally connected with an end of the push rod through the second sliding block.

[0011] Further, the center rod is further provided with a center rod abutting member; the support frame is further provided with an abutting rod, and when the center rod rotates to an end of a stroke, the center rod abutting member abuts against the abutting rod to limit the support frame.

[0012] Further, the blood vessel closure device further comprises a housing, the linkage assembly and the support frame are arranged in the housing, the support frame is slidingly connected with the housing, and the center rod is rotationally connected with the housing.

[0013] Further, a rotation center of the center rod is provided with a center rod locking member; a left side wall or a right side wall of the support frame is further provided with a limiting hole and a rotation hole which are in communication with each other; when the center rod locking member is located in the limiting hole, the center rod is locked and cannot rotate relative to the support frame; when the center rod locking member is shifted to the rotation hole, the center rod is unlocked and can rotate relative to the support frame.

[0014] Further, the blood vessel closure device further comprises an elastic member, a proximal end of the elastic member abuts against the support frame, and a distal end of the elastic member abuts against the housing.

[0015] Further, a guide member is arranged on the support frame, two housing protrusions are arranged on the housing in a transverse direction, a distal end of the elastic member abuts against the housing protrusions, and the guide member is slidingly arranged between the two housing protrusions and can extend into the elastic member from between the two housing protrusions.

[0016] Further, the inner wall of the shell is provided with an upper arc-shaped guide rail and / or a lower arc-shaped guide rail with the shell connecting part of the shell as the center, one end of the center rod is in sliding connection with the upper arc-shaped guide rail, and / or the other end of the center rod is in sliding connection with the lower arc-shaped guide rail.

[0017] Further, the inner wall of the shell is provided with a wedge-shaped protrusion close to the lower arc-shaped guide rail, the thickness of the wedge-shaped protrusion gradually increases from the distal end to the proximal end; the wedge-shaped protrusion can extrude the side wall of the center rod to limit it.

[0018] Further, the wedge-shaped protrusion is arranged substantially in parallel with the lower arc-shaped guide rail.

[0019] Further, a wrench is further included, the wrench is in rotational connection with the shell connecting part of the shell at a first position, and is in rotational connection with the end of the center rod at a second position; the rotation of the wrench relative to the shell can drive the rotation of the center rod.

[0020] Further, the lower arc-shaped guide rail is an arc-shaped through groove; a wrench connecting pin is further included, the wrench connecting pin is in rotational connection with the end of the center rod, and at least one free end thereof passes through the arc-shaped through groove and is connected with the wrench.

[0021] Further, the blood vessel closure device further includes a button, the proximal side of the button is in rotational connection with the shell, and when the button is pressed, it extrudes the inner tube to make it bend.

[0022] Further, the distal side of the button is provided with a button hook part with a grabbing part, and the grabbing part can extrude the inner tube.

[0023] Further, the button hook part is further provided with a button locking part; a second sliding block is further included, the push tube is in rotational connection with the end of the push rod through the second sliding block, and the proximal side of the second sliding block is provided with a button locking piece matched with the button locking part.

[0024] Further, the button is further provided with a button limiting piece, and the support frame is provided with a support frame limiting piece matched with the button limiting piece.

[0025] The technical scheme of the present application has the following beneficial effects:

[0026] 1. The delivery system of the present application can realize semi-automatic release of the vascular puncture port without the aid of image devices such as ultrasound, DSA, CT and magnetic resonance, and can identify whether the implant device reaches the expected position of the puncture port through the indication function of the tension assembly;

[0027] 2、The application adopts a connecting rod bidirectional transmission mechanism, the withdrawal of the outer tube and the pushing of the push tube are simultaneously performed, the deployment efficiency of the sealant can be improved, and the operation process is shortened;

[0028] 3、The application adopts multiple locking devices to ensure the orderly performance of each step in the operation process, prevent the misoperation of the subsequent steps when the previous steps are not performed, thereby reducing the mistakes in the operation process, simplifying the operation process, and ensuring the success rate of the operation;

[0029] 4、The application is provided with multiple stroke limiting mechanisms for limiting and maintaining the corresponding operation components, so that they are limited and maintained in the state at the stroke end position, and unintended events caused by return are prevented. BRIEF DESCRIPTION OF DRAWINGS

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

[0031] Fig. 2 is an exploded structure diagram of the blood vessel closure device in the first embodiment;

[0032] Fig. 3 is a partial cross-sectional view of the distal end side of the blood vessel closure device in the first embodiment;

[0033] Fig. 4 is a perspective structure diagram of the housing in the first embodiment;

[0034] Fig. 5 is a perspective structure diagram of the connecting rod assembly in the first embodiment;

[0035] Fig. 6 is a perspective structure diagram of the key in the first embodiment;

[0036] Fig. 7 is a perspective structure diagram of the support frame in the first embodiment;

[0037] Fig. 8 is an internal structure diagram of the blood vessel closure device in the first embodiment;

[0038] Fig. 9 is another internal structure diagram of the blood vessel closure device in the first embodiment;

[0039] Fig. 10 is an internal partial structure diagram of the blood vessel closure device in the first embodiment;

[0040] Fig. 11 is another internal partial structure diagram of the blood vessel closure device in the first embodiment;

[0041] Fig. 12 is another internal structure diagram of the blood vessel closure device in the first embodiment;

[0042] Fig. 13 is a perspective structure diagram of the wrench in the first embodiment;

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

[0044] Fig. 14b is another cross-sectional view of the vascular closure device in the first embodiment;

[0045] Fig. 15 is a schematic view of the vascular closure device in the first embodiment entering a blood vessel; DETAILED DESCRIPTION

[0046] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without some or all of these specific details. In other instances, well known process steps have not been described in detail in order to avoid unnecessarily obscuring the present application. The specific embodiments of the present application are shown in the drawings and described below.

[0047] It should be noted that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or intervening elements can also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element, or intervening elements can also be present. The terms "upper", "lower", "left", "right" and similar terms used herein for the purpose of illustration only and are not intended to be limiting.

[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 application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0049] It should be noted that for the delivery device, the end of the delivery device closer to the operator is referred to as the "proximal end", the end of the delivery device farther from the operator is referred to as the "distal end", and the "proximal end" and "distal end" of any component of the delivery system are defined according to this principle; "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] Referring to FIG. 1, the present embodiment provides a blood vessel closure device 1, which is suitable for carotid artery and femoral artery, can close the blood vessel puncture port caused by 5F-8F blood vessel sheath, shorten the hemostasis time, make the patient walk as soon as possible, improve the patient's comfort, and reduce the risk of manual compression. Specifically, the blood vessel closure device 1 includes a handle 100 and an outer tube 110 connected to the handle 100 at the proximal end and extending out of the handle 100 at the distal end. The outer tube 110 extends along the longitudinal axis X-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 the present embodiment, the connecting portion 50 is a flexible stress relief element, which is sleeved on the outer periphery of the outer tube 110 to reduce the bending stress of the outer tube 110. The handle 110 includes a housing 10, a wrench 30 rotatably connected to the lower side of the housing 10, and a button 40 rotatably connected to the upper side of the housing 10. In addition, a three-way valve assembly 20 is also connected to the proximal end side of the housing 10.

[0051] Referring to FIG. 2, the blood vessel closure device 1 is further described. In the present embodiment, the tube assembly includes an outer tube 110, a push tube 120, and an inner tube 130. The push tube 120 is slidingly arranged in the lumen of the outer tube 110, and the inner tube 130 is slidingly arranged in the lumen of the push tube 120 to achieve the nested connection of the three tubes from the outside to the inside. The proximal end of the inner tube 130 is fixedly connected to an inner tube fixing member 80. In order to facilitate assembly and installation, the housing 10 is divided into two parts in the present embodiment, thereby including a first housing 11 and a second housing 12. Similarly, in order to facilitate assembly and installation, the support frame 60 is also divided into two parts in the present embodiment, thereby including a first support frame 61 and a second support frame 62. The support frame 60 is slidingly arranged in the housing 10 and is elastically connected to the housing 10 by an elastic member 90. The three-way valve assembly 20 includes a soft tube 21 and a three-way valve 22 in communication with the soft tube 21. The distal end of the soft tube 21 is in communication with the inner tube 130 through the inner tube fixing member 80. In other embodiments, the soft tube 21 can also be directly in communication with the proximal end of the inner tube 130. The button 40 is rotatably connected to the upper side of the housing 10, the wrench 30 is rotatably connected to the lower side of the housing 10, and a cover plate 301 is arranged on the wrench 30. A connecting rod assembly 70 is also arranged in the housing 10, and the movement of the connecting rod assembly 70 can cause the outer tube 110 and the push tube 120 to move towards each other. The movement towards each other in the present embodiment refers to the movement of objects towards each other.

[0052] Referring to FIG. 3, the outer tube assembly is described. The distal end of the inner tube 130 is connected to the expandable element 140. In an exemplary embodiment, the inner tube 130 is a balloon catheter and the expandable element 140 is a balloon, which can be a semi-compliant balloon. The expandable element 140 can also be other expandable elements, such as a deformable and expandable occlusion disc, an occlusion device, etc. The inner lumen of the outer tube 110 is filled with the sealant 2. The sealant 2 is a biodegradable material, which is released by the vascular closure device 1 at the puncture site on the blood vessel wall, expands and fixes at the puncture site when in contact with the blood and tissue fluid outside the blood vessel, and contains blood clotting factors in the sealant material to accelerate the healing of the puncture site on the blood vessel, and after hemostasis, the sealant material is degraded in a short period of time.

[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, i.e., the proximal end is located on the proximal end side of the sealant 2. A core wire 150 is also arranged in the inner tube 130, which extends along the longitudinal axis after passing through the end of the inner tube 130, so as to pass through the expandable element 140. The core wire 150 is arranged to support the inner tube 130 and the expandable element 140 to improve the structural strength thereof. 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 press the sealant 2, so as to release the sealant 2 from the outer tube 110.

[0054] Referring to FIG. 4, the shell 10 is described. It is considered that the first shell 11 and the second shell 12 have substantially the same structure, and thus the second shell 12 is exemplarily described. The same parts of the first shell and the second shell 12 are not described again, and the different parts of the two are described. The shell 10 extends along the longitudinal axis X-X, and the shell connecting part 106 is arranged on the shell 10. In the embodiment, the shell connecting part 106 is a through hole penetrating the shell 10. In other embodiments, the shell connecting part 106 can be a protruding structure, or protrusions and grooves are arranged on the inner and outer sides of the shell, and of course, other rotating connection structures can be used, such as bearings. The upper arc-shaped guide rail 101 is arranged on the upper side of the shell 10, and the lower arc-shaped guide rail 102 is arranged on the lower side of the shell 10. The extension trajectories of the upper arc-shaped guide rail 101 and the lower arc-shaped guide rail 102 are both circular arcs, and the centers of the circular arcs coincide with the center of the shell connecting part 106. In the embodiment, the upper arc-shaped guide rail 101 is formed by an arc-shaped protrusion arranged on the inner wall of the shell 10, and the lower arc-shaped guide rail 102 is formed by an arc-shaped through hole penetrating the two sides of the shell 10. In other embodiments, the upper arc-shaped guide rail 101 can be formed by an arc-shaped through hole penetrating the two sides of the shell 10, and the lower arc-shaped guide rail 102 can be formed by an arc-shaped protrusion arranged on the inner wall of the shell 10. Different from the first shell 11, the inner wall of the second shell 12 in the embodiment is further provided with a wedge-shaped protrusion 121, the edge of which is flush with or has a certain distance from the edge of the lower arc-shaped guide rail 102. The wedge-shaped protrusion 121 extends in a direction substantially parallel to the central axis of the lower arc-shaped guide rail 102, that is, the wedge-shaped protrusion 121 is substantially parallel to the lower arc-shaped guide rail 102, and the thickness of the wedge-shaped protrusion 121 gradually increases from the proximal end to the distal end. In addition, the first limiting part 104 is arranged on the proximal side of the inner wall of the shell 10. In the embodiment, the first limiting part 104 is a protrusion arranged on the two sides of the inner wall of the shell 10, and the first supporting part 107 is arranged on the inner wall between the two oppositely arranged protrusions. The second limiting part 105 is arranged on the distal side of the inner wall of the shell 10. In the embodiment, the second limiting part 105 is a protrusion arranged on the two sides of the inner wall of the shell 10, and the second supporting part 108 is arranged on the inner wall between the two oppositely arranged protrusions. The first limiting part 104 and the second limiting part 105 are used to transversely limit the side wall of the support frame 60, and the first supporting part 107 and the second supporting part 108 are used to support the bottom wall of the support frame 60, so as to realize the sliding connection between the support frame 60 and the shell 10. In addition, the display window 103 is arranged on the distal side of the shell 10, and the window scale line (not shown in the figure) is arranged around the display window 103.

[0055] Referring to Fig. 5, the structure of the connecting rod assembly 70 is described. The connecting rod assembly 70 includes a center rod 71 and a pull rod 72 and a push rod 73 rotatably connected at both ends of the center rod 71, respectively. The pull rod 72 is rotatably connected with a first sliding block 74, which constitutes an outer tube fixing member in this case. The push rod 73 is rotatably connected with a second sliding block 75, which constitutes a push tube fixing member in this case. The rotatable connection structure in this embodiment can be formed by inserting a pin shaft into the holes provided on the two parts to be rotatably connected, or by providing a protrusion-groove rotatable connection on the two parts to be rotatably connected, respectively, and achieving the rotatable connection by the rotation of the protrusion-groove. Of course, other structures such as bearings and spherical joints can also be used. The rotatable connection structure in Fig. 5 of this embodiment is only used for illustrative purposes, but does not limit the rotatable connection structure of this embodiment.

[0056] The center rod 71 comprises a center rod body 711, and a center rod connecting portion 713 is arranged at a center position of one side or both sides of the center rod body 711 along the length direction of the center rod body 711, and the rotating connection with the shell 10 is realized through the center rod connecting portion 713. In the embodiment, the center rod connecting portion 713 is arranged as a rod-shaped protrusion extending along the transverse axis A-A, and an end portion through hole 714 is arranged at the free end of the rod-shaped protrusion. The transverse axis A-A is the rotating center axis of the center rod 71, and the center rod 71 rotates with the transverse axis A-A as the rotating center. The transverse axis A-A extends in the transverse direction and is perpendicular to the longitudinal axis X-X. In other embodiments, the center rod connecting portion 713 can also be a connecting hole structure, and the rotating connection with the shell 10 is realized through a rotating pin or is matched with a protrusion structure arranged on the shell 10 to realize the rotating connection. For the pull rod 72, one end is rotatably connected with one end of the center rod 71, and the other end is rotatably connected with the first sliding block 74. The push rod 73 is similar to the pull rod 72, one end is rotatably connected with the other end of the center rod 71, and the other end is rotatably connected with the second sliding block 75. In the embodiment, the rotating connection is realized by arranging an opening at the end of the rod and inserting a pin shaft, for example, the rotating connection between the center rod 71 and the pull rod 73 is realized by a pin shaft, and the end of the pin shaft protrudes outward from the center rod 713 and / or the pull rod 73. The outward protruding end of the pin shaft constitutes the first connecting rod limiting piece 717. Of course, in other embodiments, the end of the pin shaft can not protrude outward (the end is flush with the side wall of the rod or is arranged inside the opening of the rod), and a protrusion structure coaxial with the rotating center axis (the relative rotating center axis of the center rod 71 and the pull rod 73) is arranged on the side of the center rod 71 and / or the pull rod 73, and the protrusion structure can also constitute the first connecting rod limiting piece 717. In addition, the first connecting rod limiting piece 717 can also be constituted in the form of a groove. A second connecting rod protrusion 718 is further arranged at the rotating connection position of the center rod 71 and the push rod 72. In the embodiment, the second connecting rod limiting piece 718 is a protrusion structure arranged on the side of the center rod 71 and / or the push rod 72 and coaxial with the rotating center axis of the two. Of course, in other embodiments, the same or similar structure as the first connecting rod limiting piece 717 can also be used, and details are not described here. A center rod locking piece 712 is further arranged near the center rod connecting portion 713 of the center rod 71. In the embodiment, the center rod locking piece 712 is a square structure and is fixedly arranged on the outer periphery of the center rod connecting portion 713. In addition, the center rod locking piece 712 can also be other structures, such as a triangular block or a polygonal block, and can be directly arranged on the rod body 711. A center rod abutting piece 716 is further arranged on the side wall of the center rod body 711 near the one end of the first connecting rod limiting piece 717. The center rod abutting piece 716 is a protrusion structure, the extending direction of which is perpendicular to the transverse axis A-A, and the included angle with the length direction of the center rod 71 is less than 90 degrees. A center rod through hole 715 extending along the longitudinal axis X-X is further arranged at the center position of the center rod 71 and penetrates the center rod 71.The through hole 715 is arranged so that the inner tube 130 can pass through the center rod 71 along the longitudinal axis.

[0057] Continuing to refer to FIG. 5, the pull rod 72 is rotationally connected with the first slider 74, and a first connecting rod output limiting piece 741 is arranged on the side wall of the pull rod 72 and / or the first slider 74; the push rod 73 is rotationally connected with the second slider 75, and a second connecting rod output limiting piece 751 is arranged on the side wall of the push rod 73 and / or the second slider 75. In the embodiment, the first connecting rod output limiting piece 741 and the second connecting rod output limiting piece 751 are formed by the free end of the pin shaft, and in other embodiments, a protruding structure similar to the second connecting rod limiting piece 718 can also be used, or a groove structure can also be used. In addition, the second slider 75 is also provided with a button locking piece 752 extending along the longitudinal axis X-X. The button locking piece 752 is a strip-shaped protruding structure extending towards the proximal end along the longitudinal axis X-X. Alternatively, the button locking piece 752 can also be provided as a groove structure.

[0058] The first slider 74 is sleeved on the outer periphery of the outer tube 110 to achieve fixed connection therebetween, the second slider 75 is sleeved on the outer periphery of the push tube 120 to achieve fixed connection therebetween, and the proximal end of the inner tube 130 is fixedly connected with the inner tube fixing piece 80 after extending out of the push tube 120. When the center rod 71 rotates around the direction C-C with the transverse axis A-A as the center, under the action of the center rod 71, the pull rod 72 pulls the first slider 74 to drive the outer tube 110 to move towards the proximal end along the longitudinal axis X-X, and the push rod 73 pushes the second slider 75 to drive the inner tube 120 to move towards the distal end along the longitudinal axis X-X, 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 can not be provided, and the pull rod 72 can be directly rotationally connected with the outer tube 110, and the push rod 73 can be directly rotationally connected with the push tube 74. For example, a pin shaft can be fixed on the outer periphery of the outer tube 110 or the push tube 74, and the pull rod 72 or the push tube 74 is directly connected with the pin shaft. The first slider 74 and the second slider 75 are provided as intermediate connecting pieces to achieve the rotational connection between the pull rod 72 and the outer tube 110 and the rotational 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 the movement output sliders of the connecting rod assembly 70 to convert the rotational movement of the center rod 71 into linear movement. When the outer tube 110 and the push tube 120 exist, since the outer tube 110 itself slides relative to the push tube 120 at this time, the first slider 74 and the second slider 75 can be omitted.

[0060] Referring to FIG. 6, the structure of the button 40 is described. The button 40 includes a button body 41 and a button hook portion 42 arranged at the distal end of the button body 41. A button connecting piece 411 is arranged on the outer wall of the proximal end of the button body 41, and the button connecting piece 411 is rotationally connected to the inner wall of the shell 10. In addition, a button limiting piece 412 is arranged on the outer wall of the distal end of the button body 41. In an exemplary embodiment, the button limiting piece 412 is a groove structure arranged on one or both sides of the button body. The button hook portion 42 is formed by bending a strip structure, and a gripping portion 422 is arranged at the bottom of the button hook portion 42. In an exemplary embodiment, the gripping portion 422 is formed by a slotted bottom, and of course can also be formed by other structures, such as a hook structure or a protruding structure arranged at the bottom, as long as the gripping portion 422 can grip the inner tube. A button locking portion 421 extending in the transverse direction is also arranged at the approximate middle of the button hook portion 42. In an exemplary embodiment, the button locking portion 421 is formed by an open groove arranged on the side wall of the button hook portion 42. Of course, in other embodiments, the button locking portion 421 can also be formed by other structures, such as a protruding structure, or a rod-shaped structure with an opening arranged on the wall of the button locking portion 421 and extending along the longitudinal axis. The structure of the button locking portion 421 is not specifically limited, as long as it can limit the rotation of the button 40 relative to the shell 10 to achieve locking.

[0061] Referring to Fig. 7, the structure of the support frame 60 is described. The support frame 60 comprises a support frame body 61 in the form of a frame structure extending along the longitudinal axis, and the support frame body 61 has an inner cavity, the upper and lower ends of which are in communication with the outside. The link assembly 70 is movably mounted in the inner cavity of the support frame 60, and the support frame 60 provides support and limiting for the link assembly 70, while the support frame 60 is slidably mounted in the housing 10 and can move along the longitudinal axis relative to the housing 10. An elastic member mounting portion 613 is provided on the proximal side of the support frame body 61. In this embodiment, the elastic member mounting portion 613 is a protruding structure with an inner cavity. A guide member 62 is provided on the distal side of the elastic member mounting portion 613 opposite the elastic member mounting portion 61. One end of the guide member 62 is fixed to the support frame body 61, and the other end extends in the direction of the elastic member mounting portion 613 (the proximal side) along the longitudinal axis. An indicating block 611 is provided on the distal side of the support frame body 61, and a scale line 612 is provided on the indicating block. The indicating block 611 and the scale line 612 are provided to indicate the relative position of the support frame 60 relative to the housing 10, to determine the relative sliding distance of the two. A lateral extending abutting rod 610 is also provided on the support frame body 61, which can abut with the central rod abutting member 716 to limit the support frame 60. In addition, a first slide rail 68 and a second slide rail 69 are provided on one side or both sides of the support frame body 61, and are spaced apart from each other and extend along the longitudinal axis. The first slide rail 68 limits the first link output limiting member 741, so that the first link output limiting member 741 moves along the first slide rail 68 in the longitudinal axis direction. The second slide rail 69 limits the second link output limiting member 751, so that the second link output limiting member 751 moves along the second slide rail 69 in the longitudinal axis direction. Exemplarily, the first slide rail 68 and the second slide rail 69 are slide groove structures extending along the longitudinal axis and provided on one side 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 constitute the slide rails of the first link output limiting member 741 and the second link output limiting member 751 to guide their movement in a straight line direction. In addition, a rotating hole 67 and a limiting hole 66 are provided in sequence on the distal side of the second slide rail. The cross-sectional shape of the limiting hole 66 matches the central rod locking member 712, and the central rod locking member 712 can be embedded in the limiting hole 66, and the central rod locking member 712 can move along the longitudinal axis in the limiting hole 66 but cannot rotate, thereby locking the central rod 71, and in this locked state, the central rod 71 cannot rotate around the transverse axis A-A. The rotating hole 67 is in communication with the limiting hole 66, and its cross-sectional area is larger than that of the central rod locking member 712 to ensure that it can rotate in the rotating hole 67. When the central rod locking member 712 slides along the longitudinal axis from the limiting hole 66 to the rotating hole 67, the central rod 71 changes from the locked state to the unlocked state, and in this unlocked state, the central rod can rotate around the transverse axis A-A.The first cavity 63 and the second cavity 615 are arranged on the frame body 61 near the guide 62. The abutting groove 64 is arranged on the wall of the distal end side of the first cavity 63. The abutting groove 64 is located at the transverse center of the frame body 61 and is used for the inner tube 130 to pass through and support the inner tube 130, so as to cooperate with the key 40, and the inner tube 130 is bent under the extrusion of the key 40. The support frame limiting part 65 is arranged on the inner wall of the second cavity 615 and cooperates with the key limiting part 412. In the embodiment, the support frame limiting part 65 is a convex structure in a conical structure, which can be elastically deformed.

[0062] Referring to FIG. 8, the assembly relationship of the support frame 60, the shell 10 (taking the shell 11 as an example), and the connecting rod assembly 70 in the embodiment is described. The support frame 60 is slidingly installed in the first shell 11, and at this time, the guide 62 is embedded in the guide sliding rail on the inner wall of the first shell 11. In the embodiment, the guide sliding rail is composed of two shell protrusions 111 arranged oppositely on the inner wall of the first shell 11, and the gap between the two shell protrusions 111 constitutes the guide sliding rail. The guide 62 in a rod structure can slide in the guide sliding rail. One end of the elastic member 90 abuts against the elastic member mounting part 613, and the other end abuts against the shell protrusion 111. In addition, the guide 62 can extend into the elastic member 90. In the embodiment, the elastic member 90 is a spiral column spring. Alternatively, the elastic member can also be a conical spring or other elastic structure such as an elastic rod. When the support frame 60 is pulled to slide relative to the first shell 11 to the distal end, the elastic member 90 is compressed with the movement of the elastic member mounting part 613. For the guide 62, on the one hand, it is used for guiding the support frame 60, and the guide 62 is always in the guide sliding rail during the compression of the elastic member, so as to ensure that the elastic member mounting part 613 moves in the axial direction, to ensure that the elastic member 90 is compressed or recovered in the longitudinal axis direction, and to prevent the elastic member 90 from being offset during deformation. In addition, the guide 62 extends into the elastic member 90 and can limit the elastic member 90, to prevent the end of the elastic member 90 from being separated from the shell protrusion 111 due to transverse sliding relative to the shell protrusion 111. The indicating block 611 is arranged near the display window 103, and the indicating block 611 can be observed through the display window 103. When the support frame 60 moves to the position where the window scale line is aligned with the scale line on the indicating block 62, it indicates that the support frame 60 has moved to the predetermined position.

[0063] Continuing to refer to FIG. 8, in the initial state, the center rod locking member 712 is located in the limiting hole 66, and the center rod 71 is in the locked state. When the support frame 60 is pulled to move distally under the action of an external force, the shell 10 is relatively stationary with the center rod 71, and the support frame 60 moves distally relative to the center rod 71 against the elastic restoring force of the elastic member 90, so that the center rod locking member 712 moves into the rotating hole 67, and the locking of the center rod 71 is released, and the center rod 71 can rotate relative to the shell 10 about the horizontal axis A-A. Therefore, in the embodiment, the unlocking of the linkage assembly 70 can be achieved by moving the support frame 60 proximally. In addition, the first linkage output limiting member 741 provided on the first sliding block is limited in the first sliding rail 68, and the second linkage output limiting member 751 provided on the inner tube fixing member is limited in the second sliding rail 68, so as to ensure that the first linkage output limiting member 741 and the second linkage output limiting member 751 move linearly along the longitudinal axis during the rotation of the center rod 71 about the horizontal axis under the force transmission of the pull rod 72 and the push rod 73.

[0064] Referring to FIG. 9, the inner tube 130 is fixed with the inner tube fixing member 80, and the inner tube fixing member 80 is fixedly arranged in the support frame 60, so as to achieve the fixed connection of the distal end of the inner tube 130 with the support frame 60. Therefore, when the inner tube 130 is pulled distally, the tension acting on the inner tube 130 drives the support frame 60 to move distally, so as to achieve the unlocking of 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, so as to ensure that the end of the center rod 71 connected with the pull rod 72 slides along the lower arc-shaped guide rail 103, and the end of the center rod connected with the push rod 73 slides along the upper arc-shaped guide rail 102 during the rotation of the center rod 71 about the horizontal axis. The upper arc-shaped guide rail 102 and the lower arc-shaped guide rail 103 limit the movement trajectory of the ends of the center rod 71, so as to ensure the stability of the movement of the linkage assembly 70, and prevent the rotation connection between the center rod 71 and the push rod 72 or the pull rod 73 from failing due to the biasing force, so that the relative rotation cannot occur.

[0065] Referring to FIG. 10, the button 40 is rotatably mounted on the housing 10 by the button connecting member 411, so that the button 40 can rotate relative to the housing 10 about the central axis of the connecting member 411. In the initial state (before pressing), the gripping portion 422 of the button 40 abuts against the inner tube 130, thereby preventing the button 40 from rotating relative to the housing 10 due to gravity. In addition, before the central rod 71 is rotated, the push rod fixing member 75 is close to the button hook portion 42 of the button, at which time the button locking member 752 cooperates with the button locking portion 421. Exemplarily, as shown in FIG. 10, the button locking member 752 is inserted into the button locking portion 421 in the form of an open groove structure, thereby preventing the rotation of the button 40 relative to the housing 10, at which time the button 40 is in a locked state. When the central rod 71 is rotated about the C-C direction, the push rod fixing member 75 gradually moves away from the button 40, so that the button locking member 752 is separated from the button locking portion 421, thereby unlocking the button 40. At this time, the button 40 is pressed relative to the housing 10, and the gripping portion 422 is pressed downwardly against the inner tube 422. Since the inner tube 422 is supported upwardly by the support frame 60, when the inner tube 130 is pressed downwardly by the button hook portion 42, the inner tube 422 is bent to follow the button hook portion 42 into the first cavity 63 while being subjected to the upward support force and the downward pressing force (the action points of the two forces are offset in the longitudinal direction and do not coincide), at which time the button body 41 enters the second cavity 615. After the inner tube 422 is bent, the length of the inner tube 411 along the longitudinal direction is shortened, and the distal end of the inner tube 411 is retracted into the outer tube 110, thereby driving the expandable element 140 to retract into the outer tube 110. In addition, 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, so that at the end of the pressing stroke, the support frame limiting member 65 limits the button limiting portion 421 to lock the button 40, thereby preventing the button 40 from rebounding after the end of the pressing stroke. In the present example, the support frame limiting member 65 is a conical protrusion structure, and the button limiting member 421 is a conical hole structure, so that the support frame limiting member 65 is inserted into the button limiting member 412 to limit the button 40.

[0066] Referring to FIG. 11, the relative positions of the center rod 71, the pull rod 72 and the push rod 73, the first sliding block 74 and the second sliding block 75 after the center rod 71 rotates by a certain angle are shown. It can be seen that with the rotation of the center rod 71, the first sliding block 74 and the second sliding block 75 move towards each other, so that the outer tube 110 moves towards the proximal end while the push tube 120 moves towards the distal end, that is, a linkage bidirectional transmission is formed. Compared with unidirectional transmission (only the outer tube 110 moves or the push tube 120 moves), the efficiency of pushing the sealant 2 is greatly improved, and the push tube 120 can efficiently extrude the sealant 2 from the outer tube 110, realizing rapid release of the sealant. In addition, as can be seen from FIG. 11, the key locking member 752 is away from the key hook part 42 at this time, so as to release the locking of the key 40 by the key locking member 752, realizing unlocking of the key 40. In addition, when the rotation stroke of the center rod 71 ends, the center rod abutting member 716 abuts against the abutting rod 610 to overcome the elastic restoring force of the elastic member 90, limiting the proximal movement of the support frame 60, and preventing the support frame 60 from returning to the proximal end due to the elastic restoring force of the elastic member 90 after the tension of the inner tube 130 disappears.

[0067] Referring to FIG. 12, 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 will approach and extrude the wedge-shaped protrusion 121. Since the thickness of the wedge-shaped protrusion 121 increases from the distal end to the proximal end assembly, the extrusion force between the side wall of the center rod 71 and the wedge-shaped protrusion 121 will gradually increase during the rotation of the center rod 71, and reach the maximum after the rotation stroke of the center rod 71 ends, thereby limiting the center rod 71 and preventing it from continuing to move after the stroke ends.

[0068] Referring to FIG. 13, the structure of the wrench 30 is described. The wrench 30 is provided with a wrench connecting part 31 at a first position, and a wrench connecting hole 32 is further provided on the inner wall of the wrench 30 at a second position. In addition, a wrench through hole 33 is further provided on the outer wall of the wrench 30, which communicates with the wrench connecting hole 32. In this embodiment, the pin shaft can be inserted into the pin shaft connecting hole 32 from the wrench through hole 33, and the wrench through hole 33 is plugged by a cover plate 301 (see FIG. 2) to axially limit the pin shaft and prevent it from loosening.

[0069] Referring to FIGS. 14a-14b, the installation method of the wrench 30 is described.

[0070] In one aspect, as shown in FIG. 14a, the wrench 30 is connected with the shell 10 through the wrench connecting part 31 and the shell connecting part 106. The connection can be achieved by a convex-concave structure or a pin shaft. In this embodiment, the shell connecting part 106 is in the form of a through hole, and the two end parts of the center rod connecting part 713 are directly inserted into the shell connecting part 106 to achieve the rotation connection with the shell 10. The convex structure of the wrench connecting part 31 is directly inserted into the end through hole 714 of the center rod connecting part 713 to achieve the stable rotation connection with the shell 10. Of course, in other embodiments, the wrench connecting part 31 can be connected with the shell connecting part 106 only, without the need to be connected with the center rod connecting part 713.

[0071] In another aspect, referring to Fig. 14b, the wrench 30 is rotatably connected to one end of the center rod 71 via the wrench connecting pin 34. Specifically, in this embodiment, the wrench connecting pin 34 is inserted into both the center rod 71 and the pull rod 72 to rotatably connect the center rod 71 and the pull rod 72. That is, the wrench connecting pin 34 serves as the rotation connecting shaft of the center rod and the pull rod 72. In addition, the free end of the wrench connecting pin 34 extending out of one or both ends of the center rod 71 and the pull rod 72 is connected to the wrench connecting hole 32. Specifically, in this embodiment, the wrench connecting pin 34 is inserted into the wrench 30 from the side with the wrench through hole 33, and then sequentially passes through the center rod 71, the pull rod 72, and the other side of the pin shaft connecting hole 32. The wrench through hole 33 is blocked by the cover plate 301 to axially limit the wrench connecting pin 34 and prevent it from being detached from the wrench 30. That is, the wrench connecting pin 34 rotatably connects the center rod 71 and the pull rod 72, and the two free ends of the wrench connecting pin 34 are connected to the pin shaft connecting holes 32 on both sides. When the wrench 30 is rotated, the wrench 30 rotates relative to the housing 10 with the position of the wrench connecting part 31 as the center. At the same time, the wrench 30 drives the wrench connecting pin 34 to swing, and the swing of the wrench connecting pin 34 provides power for the rotation of the center rod 71, thereby driving the center rod 71 to rotate. Therefore, in this embodiment, the wrench 30 provides a rotation torque for the center rod 71, thereby providing power for the movement of the linkage assembly 70. In this embodiment, the wrench 30 is rotatably connected to the lower end of the center rod 71 (the end connected to the pull rod 72). Alternatively, the wrench 30 can be rotatably connected to the upper end of the center rod 71 (the end connected to the push rod 73), and the wrench connecting pin 34 can rotatably connect the center rod 71 and the push rod 73. Since the force applied to the end of the center rod 71 can be converted into a rotation torque to drive the center rod 71 to rotate, the wrench 30 can be rotatably connected to any end of the center rod 71. In this embodiment, on the one hand, the wrench connecting part 31 of the wrench 30 is coaxially arranged with the connecting part of the center rod 71, so that the wrench 30 and the center rod 71 rotate around a common center axis. On the other hand, the wrench connecting pin 34 serves as the rotation connecting shaft of the center rod 71 and the pull rod 72 or the push rod 73, that is, the wrench connecting pin 34 is coaxially arranged with the center axis of the relative rotation between the center rod 71 and the pull rod 72 or the center rod 71 and the push rod 73, thereby ensuring that the rotation of the wrench 30 relative to the housing 10 can drive the center rod 71 to rotate and provide power for the linkage assembly 70.

[0072] The operation process of the entire vascular closure device 1 will be described below with the aid of Fig. 15, which mainly includes the following steps.

[0073] Step 1: Vascular intervention

[0074] Before the blood vessel closure device 1 enters the blood vessel 3, as shown in Fig. 2, the sealing agent 2 is loaded in the inner cavity of the outer tube 110, and the distal end of the push tube 120 is close to the sealing agent 2 and located inside the outer tube 110. The distal end of the inner tube 130 is out of the inner cavity of the outer tube 110, and the expandable element 140 is in an un-inflated and expanded state. The tube assembly and the expandable element 140 are sent into the blood vessel through a vascular delivery sheath, and the direction of the handle 100 is adjusted so that the display window 123 for tension indication of the handle 100 faces upward to facilitate subsequent observation. At this stage, the connecting rod assembly 70 is in a locked state and cannot be moved by the wrench 30. Also, the button 40 is in a locked state and cannot be pressed. Simultaneous locking of the connecting rod assembly 70 and the button 40 at this stage can prevent premature implementation of related actions due to misoperation.

[0075] Step two: anchoring of the expandable element

[0076] The pressure pump is connected to the three-way valve, and the inner tube 130 is used to fill the expandable element with liquid or gas, so that the expandable element 140 expands and expands to the desired state. After the expandable element 140 expands, the direction of the handle 100 is adjusted so that its longitudinal axis is consistent with the direction of the blood vessel puncture and approximately 45 degrees with the axial direction of the blood vessel at the puncture port 31, and then the handle 100 is retracted. During the retraction movement, the distal end of the inner tube 130 inside the blood vessel 3 will be subjected to a pulling force in the distal direction due to resistance, which will generate a tension on the inner tube 130, which will overcome the elastic restoring force of the elastic member 90 and cause the support frame 60 to move distally. As the handle 100 continues to retract, the expandable element 140 in the expanded state will abut against the inner wall at the blood vessel puncture port 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 flush with the window scale line, indicating that the expandable element 140 has reached the anchoring position and is anchored at the puncture port 31. At this time, the connecting rod assembly 71 changes from the previous locked state to the unlocked state due to the distal movement of the support frame 60.

[0077] Step three: release of the sealing material

[0078] The handle is kept still to ensure the anchoring state of the expandable element and maintain the tension on the inner tube 130. The trigger 30 is activated until the end of the stroke, and the sealing material 2 is released at the position of the blood vessel puncture port 31. With the rotation of the trigger, the stroke action of the linkage assembly 70 is activated, and the center rod 71 rotates to drive the outer tube 110 and the push tube 120 to move towards each other. In this process, the outer tube 110 retracts towards the proximal end, which exposes the sealing agent 2 inside it, and the push tube 120 advances towards the distal end, which squeezes the sealing agent 2 and pushes it out of the inner tube 110. The above-mentioned exposure and pushing out actions are performed simultaneously, which realizes the release and compression of the sealing agent 2 at the same time, accelerates the deployment efficiency of the sealing agent 2, and improves the hemostasis speed. When the trigger 30 reaches the end of the stroke, the linkage assembly 70 also reaches the end of the stroke. At this time, on the one hand, the wedge-shaped protrusion 121 on the inner wall of the shell 10 limits the center rod 71, so that the center rod 71 remains in the current position and prevents the center rod 71 from continuing to rotate, i.e. limits and maintains the linkage assembly 70; on the other hand, the center rod abutting piece 716 on the center rod 71 abuts against the abutting rod 610 on the support frame 60 to overcome the elastic recovery force of the elastic piece 90, preventing the support frame 60 from returning to the proximal end, i.e. limiting and maintaining the support frame 60; finally, the button locking piece 752 provided on the push tube limiting piece 75 is separated from the button 40, and the locking of the button 40 is released, and at this time the button 40 is in the unlocked state;

[0079] Step four: recovery of the expandable element

[0080] The three-way valve is connected to the screw syringe, the three-way valve is opened, the syringe is suctioned, and the expandable element 140 is suctioned to a vacuum state to make it shrink. Again, the handle 100 is ensured to be in the direction that the longitudinal axis thereof is consistent with the blood vessel puncture direction and is approximately 45 degrees with the blood vessel 3 at the puncture port 31. The button 40 is pressed to bend the inner tube 130, so that the expandable element 140 is recovered into the outer tube 110. When the button 40 is pressed to the end of the stroke, the button limiting piece 412 cooperates with the support frame limiting piece 65 to limit the button 40, preventing it from rebounding at the end of the stroke.

[0081] Step five: withdrawal of the blood vessel closure device

[0082] The blood vessel closure device 1 is withdrawn towards the proximal end until the outer tube 110 completely exits, and the closure operation on the blood vessel puncture port 31 is completed.

[0083] Therefore, the embodiment sets multiple locking devices to ensure the orderly progress of the above steps, prevent the misoperation of the following steps when the previous steps are not performed, reduce the errors in the operation process, simplify the operation process, and ensure the success rate of the operation. In addition, the limit mechanism is set to limit the corresponding operating components when each step reaches the end of the stroke, so that the operating components are kept at the end of the stroke position, the state is maintained, and unintended events are prevented from occurring due to the return.

[0084] Specifically, the tension of the inner tube 130 causes the support frame 60 to move, and the movement of the support frame 60 realizes the unlocking of the linkage assembly 70, at this time the button 40 is still in the locked state. The linkage assembly 70 is actuated by the trigger 30, and when the trigger 30 reaches the end of the stroke, the linkage assembly 70 also reaches the end of the stroke. At this time, the linkage assembly 70 and the support frame 60 are limited to keep at the end of the stroke position (limiting retention), and the button 40 is unlocked. The button 40 is actuated and reaches the end of the stroke position and is also limited to keep. Through the cooperation of the above components, the orderly operation of the entire operation process is realized, the misoperation in the operation process is reduced, and the occurrence of unintended events is prevented.

[0085] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. The protection scope of the present application should be subject to the appended claims.

Claims

1. A vascular closure device, characterized by, The application relates to a blood vessel closure device. The device comprises an outer tube extending along a longitudinal axis; a sealant arranged in the outer tube on a distal side; a push tube slidingly arranged in the outer tube, with a distal side close to the sealant; a linkage assembly comprising a central rod, a pull rod and a push rod, two ends of the pull rod being rotatably connected to one end of the central rod and the outer tube respectively, and two ends of the push rod being rotatably connected to the other end of the central rod and the push tube respectively; movement of the central rod can drive the outer tube and the push tube to move towards each other to push the sealant out of the outer tube to release. The device further comprises a support frame provided with a cavity penetrating through upper and lower sidewalls of the support frame, and the linkage assembly is arranged in the cavity of the support frame and movably connected to the support frame. The left sidewall and / or the right sidewall of the support frame is provided with a first sliding groove and / or a second sliding groove along the longitudinal axis, the end of the push rod rotatably connected to the outer tube is slidingly connected to the first sliding groove, and the end of the push rod rotatably connected to the push tube is slidingly connected to the second sliding groove. The central rod is further provided with a central rod locking member near the rotation center of the central rod; the left sidewall or the right sidewall of the support frame is further provided with a limiting hole and a rotation hole in communication with each other; when the central rod locking member is located in the limiting hole, the central rod is locked and cannot rotate relative to the support frame; when the central rod locking member is shifted to the rotation hole, the central rod is unlocked and can rotate relative to the support frame.

2. The vascular closure device according to claim 1, wherein, When the support frame moves distally relative to the central rod, the central rod locking member can be shifted from the limiting hole to the rotation hole, and the central rod changes from the locked state to the unlocked state.

3. The vascular closure device according to claim 2, wherein, The device further comprises an inner tube slidingly arranged in the push tube, a distal end of the inner tube being connected to an expandable element, and a proximal end of the inner tube being fixedly connected to the support frame.

4. The vascular closure device according to claim 2, wherein, The device further comprises a first sliding block, and the outer tube is rotatably connected to the end of the pull rod through the first sliding block; and / or the device further comprises a second sliding block, and the push tube is rotatably connected to the end of the push rod through the second sliding block.

5. The vascular closure device according to claim 4, wherein, The central rod is further provided with a central rod abutting member; the support frame is further provided with an abutting rod, and when the central rod rotates to the end of the stroke, the central rod abutting member abuts against the abutting rod to limit the support frame.

6. The vascular closure device according to claim 2, wherein, The device further comprises a shell, the linkage assembly and the support frame are arranged in the shell, the support frame is slidingly connected to the shell, and the central rod is rotatably connected to the shell.

7. The vascular closure device according to claim 1, wherein, The rotation center of the central rod is provided with a central rod connecting part, the shell is provided with a shell connecting part, and the central rod connecting part is rotatably connected to the shell connecting part.

8. The vascular closure device according to claim 2, wherein, The device further comprises an elastic member, a proximal end of the elastic member abutting against the support frame, and a distal end of the elastic member abutting against the shell.

9. The vascular closure device according to claim 6, wherein, The support frame is provided with a guide, the shell is provided with two shell protrusions oppositely arranged along the transverse direction, the distal end of the elastic member abuts against the shell protrusions, and the guide is slidingly arranged between the two shell protrusions and can extend into the elastic member from between the two shell protrusions.

10. The vascular closure device according to claim 9, wherein, ​ 11. The vascular closure device according to claim 9, wherein, ​ 12. The vascular closure device according to claim 11, wherein, ​ 13. The vascular closure device according to claim 9, wherein, The inner wall of the shell is provided with an upper arc-shaped guide rail and / or a lower arc-shaped guide rail with the shell connecting part of the shell as the center, one end of the center rod is slidably connected with the upper arc-shaped guide rail, and / or the other end of the center rod is slidably connected with the lower arc-shaped guide rail.

14. The vascular closure device according to claim 13, wherein, The inner wall of the shell is further provided with a wedge-shaped protrusion near the lower arc-shaped guide rail, the thickness of the wedge-shaped protrusion gradually increases from the distal end to the proximal end; the wedge-shaped protrusion can extrude the side wall of the center rod to limit it.

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

16. The vascular closure device according to claim 13, wherein, A wrench is further included, the wrench is rotatably connected with the shell connecting part of the shell at a first position, and is rotatably connected with the end of the center rod at a second position; the rotation of the wrench relative to the shell can drive the rotation of the center rod.

17. The vascular closure device according to claim 16, wherein, The lower arc-shaped guide rail is an arc-shaped through groove; a wrench connecting pin is further included, the wrench connecting pin is rotatably connected with the end of the center rod, and at least one free end thereof passes through the arc-shaped through groove and is connected with the wrench.

18. The vascular closure device according to claim 9, wherein, The blood vessel closure device further includes a button, the proximal side of the button is rotatably connected with the shell, and when the button is pressed, it extrudes the inner tube to make it bend.

19. The vascular closure device according to claim 18, wherein, The distal side of the button is provided with a button hook part with a grabbing part, the grabbing part can extrude the inner tube.

20. The vascular closure device according to claim 19, wherein, The button hook part is further provided with a button locking part; a second sliding block is further included, the push tube is rotatably connected with the end of the push rod through the second sliding block, the proximal side of the second sliding block is provided with a button locking piece matched with the button locking part.

21. The vascular closure device according to claim 18, wherein, A button limiting piece is further arranged on the button, and a support frame limiting piece matched with the button limiting piece is arranged on the support frame.

Images