Ventricular connection mechanism and ventricular assist system

Abstract

The invention relates to a ventricle connecting mechanism and a ventricle assisting system. The ventricle connecting mechanism comprises a suture ring, a clamping ring and a locking device, the suture ring is provided with a first through hole and a suture area surrounding the first through hole; the clamping ring comprises a ring body and a connecting end which are connected, the ring body is arranged on the suture ring, and the suture area is located on the periphery of the ring body. The locking device is connected to the connecting end part and can adjust the inner diameter of the ring body; the locking device can rotate relative to the connecting end part, so that the locking device can be switched between a horizontal state and an overturning state; in the horizontal state, the locking device is located on the periphery of the ring body and protrudes in the radial direction of the ring body. In the overturning state, one side, far away from the connecting end part, of the locking device is farther away from the sewing ring than in the flat placing state, so that the part, shielded by the locking device, of the sewing area is exposed. The locking device of the ventricle connecting mechanism can avoid a suturing area of a suturing ring, and uniform suturing of the suturing ring is facilitated.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to a ventricular connection mechanism and a ventricular assist system. Background Art

[0002] In the implantation surgery of the blood pump, it is usually necessary to use a ventricular connection mechanism to fix the blood pump on the heart. Specifically, the suture ring of the ventricular connection mechanism is first sutured to the outer wall of the heart, and then the blood pump is installed on the ventricular connection mechanism. However, the suture ring of the traditional ventricular connection mechanism is inconvenient to sew, and it is easy to cause bleeding due to uneven suturing. Summary of the invention

[0003] Based on this, it is necessary to provide a ventricular connection mechanism and a ventricular assist system to address the above technical problems.

[0004] A ventricular connection mechanism, comprising:

[0005] A sewing ring, the sewing ring having a first through hole and a sewing area surrounding the first through hole;

[0006] A clamping ring, the clamping ring comprising a connected ring body and a connecting end, the ring body is arranged on the sewing ring, and the sewing area is located at the outer periphery of the ring body; and

[0007] A locking device, the locking device is connected to the connecting end, the locking device can adjust the inner diameter of the ring body; the locking device can rotate relative to the connecting end so that the locking device can switch between a flat state and a flipped state;

[0008] Wherein, in the flat state, the locking device is located at the outer periphery of the ring body and protrudes radially along the ring body; in the flipped state, the side of the locking device away from the connecting end is farther away from the sewing ring than in the flat state, so that the part of the sewing area covered by the locking device is exposed.

[0009] In one embodiment, the connecting end portion includes a first connecting arm and a second connecting arm spaced apart along the circumference of the ring body;

[0010] The locking device includes a first swing arm, a second swing arm, a connecting rod and a locking piece, the first swing arm is rotatably connected to the first connecting arm, the second swing arm is rotatably connected to the second connecting arm, the connecting rod is connected to the second swing arm, and the locking piece has a rotating end and a locking end, the rotating end is rotatably connected to the connecting rod, and the rotating end can be rotatably abutted against the first swing arm, and the locking end can be engaged with the second swing arm; wherein, when the locking piece rotates relative to the first swing arm, the distance between the first swing arm and the second swing arm can be adjusted to adjust the distance between the first connecting arm and the second connecting arm, so as to adjust the inner diameter of the ring body, and the locking end is engaged with the second swing arm to prevent the distance between the first connecting arm and the second connecting arm from increasing.

[0011] In one embodiment, the ring body is an open ring, and the first connecting arm and the second connecting arm are respectively fixed to the two opposite ends of the open ring in the circumferential direction; the first swing arm is provided with a guide groove, one end of the connecting rod is fixed to the second swing arm, and the other end is rotatably connected to the locking member, and the middle part of the connecting rod can be slidably passed through the guide groove; the rotating end of the locking member is cam-shaped, and the rotating end can be rotatably abutted against the side of the first swing arm facing away from the second swing arm.

[0012] In one embodiment, the sewing ring has a mounting surface for mounting the clamping ring, wherein:

[0013] The first swing arm has a first rotation axis that rotates around the second connecting arm, and the first rotation axis is parallel to the mounting surface; and / or

[0014] The rotating end of the locking member has a second rotating axis that rotates around the first swing arm. In the flat state, the second rotating axis is perpendicular to the mounting surface; in the flipped state, the second rotating axis intersects or is parallel to the mounting surface.

[0015] In one embodiment, the ventricular connection mechanism also includes a limiting structure, which includes a positioning portion arranged at the connection end and a matching portion arranged at the locking device, and the positioning portion can be engaged with the matching portion to lock the locking device in the flat state or the flipped state.

[0016] In one embodiment, the connecting end has a first top surface facing away from the sewing ring, the positioning portion includes a first positioning portion provided on the first top surface, and in the flipped state, the matching portion can be engaged with the first positioning portion to lock the locking device in the flipped state;

[0017] And / or, the connecting end portion has a first side surface radially facing away from the central axis of the ring body, the positioning portion includes a second positioning portion arranged on the first side surface, and in the flat state, the matching portion can be engaged with the second positioning portion to lock the locking device in the flat state;

[0018] And / or, one of the matching portion and the positioning portion is configured as a protruding structure, and the other is configured as a recessed structure.

[0019] In one embodiment, the connecting end portion includes a first connecting arm and a second connecting arm, the locking device includes a first swing arm, a second swing arm, a connecting rod and a locking member, the first swing arm is rotatably connected to the first connecting arm, the second swing arm is rotatably connected to the second connecting arm, the connecting rod is connected to the second swing arm, the locking member has a rotating end and a locking end, the rotating end is rotatably connected to the connecting rod, and the rotating end can be rotatably abutted against the first swing arm, and the locking end can be engaged with the second swing arm; wherein:

[0020] The matching portion is arranged on the first swing arm, and the positioning portion is arranged on the first connecting arm;

[0021] Alternatively, the matching portion is arranged on the second swing arm, and the positioning portion is arranged on the second connecting arm.

[0022] In one embodiment, the ring body has a third top surface facing away from the sewing ring, and when the locking device is in the flipped state, a first angle α is formed between the locking device and the third top surface, wherein α≤90°.

[0023] In one of the embodiments, the ring body has an outer peripheral wall, and the clamping ring further includes a lug, wherein the lug and the connecting end are both arranged on the outer peripheral wall, and the lug can be clamped by a clamp.

[0024] In one embodiment, the outer peripheral wall includes a tangent plane and an arc surface connected to the tangent plane, and the lug is convexly arranged on the tangent plane along the radial direction of the ring body;

[0025] And / or, the lug includes a first lug and a second lug, the first lug and the second lug are spaced apart along the circumference of the ring body, the first lug has a first distance H1 from the central axis of the ring body, the second lug has a second distance H2 from the central axis of the ring body, wherein H2

[0026] A ventricular assist system comprises a ventricular assist device and a ventricular connection mechanism as described in any one of the above items; the ventricular assist device is arranged on the clamping ring of the ventricular connection mechanism and is locked by the locking device of the ventricular connection mechanism.​

[0027] In the above-mentioned ventricular connection mechanism and ventricular assist system, the locking device is rotatably connected to the connecting end of the clamping ring, so that the locking device can switch between a flat state and a flipped state, wherein, in the flipped state, the side of the locking device away from the connecting end is farther away from the suture ring than in the flat state, so that the part of the suture area blocked by the locking device is exposed, thereby avoiding the suture area of ​​the suture ring, avoiding interference with the suturing of the suture ring, facilitating uniform suturing of the suture ring, and reducing the chance of bleeding due to uneven suturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of the ventricular connection mechanism provided in one embodiment of the present application when the locking device is in a flat state.

[0029] Figure 2 for Figure 1 The ventricular connection mechanism is shown in a top view when the locking device is in a flat position.

[0030] Figure 3 for Figure 1 A schematic structural diagram of a ventricular connection mechanism is provided when the locking device is in a flipped state.

[0031] Figure 4 for Figure 1 A schematic structural diagram of a sewing ring and a clamping ring of a ventricular connection mechanism is provided.

[0032] Figure 5 for Figure 1 A top view of the clamping ring of the ventricular connection mechanism is provided.

[0033] Figure 6 for Figure 5 A partial view of the clamping ring of the ventricular connection mechanism is provided.

[0034] Figure 7 for Figure 1 A schematic structural diagram of a ventricular connection mechanism is provided when the locking device is in a flipped state.

[0035] Figure 8 for Figure 1 A partial enlarged view at P1.

[0036] Fig. 9 for Figure 3 A local enlarged view at P2.

[0037] Fig.10 for Figure 1 A simplified side view of the ventricular connection mechanism is provided when the locking device is in a flat position.

[0038] Fig.11 for Figure 1 A schematic structural diagram of a locking device of a ventricular connection mechanism is provided.

[0039] Fig.12 for Figure 1 An exploded view of the locking device of the ventricular connection mechanism is provided.

[0040] Fig.13 for Figure 1 A schematic diagram of the structure of a ventricular connection mechanism clamped by a clamp is provided.

[0041] Fig.14 for Figure 1 A schematic diagram of the ventricular connection mechanism cooperating with the clamp and the ventricular assist device is provided.

[0042] Fig.15 A partial cross-sectional view of a ventricular connection mechanism provided in another embodiment while being clamped by a clamp.

[0043] Fig.16 for Figure 4 A partial enlarged view at P3.

[0044] The reference numerals in the accompanying drawings are described as follows:

[0045] 10. Ventricular connection mechanism; 100. Suture ring; 100a. First through hole; 100b. Suture area; 100c. Suture mark; 110. Mounting surface; 200. Clamping ring; 210. Ring body; 211. Head end; 212. Tail end; 210a. Second through hole; 210b. Arc groove; 213. Outer ring; 2131. First half ring; M. First suture hole; 2132. Second half ring; N. Second suture hole; 214. Inner ring points; 216, peripheral wall; 2161, cutting plane; 2162, arc surface; 217, third top surface; 220, second connecting arm; 221, first top surface; 222, first bottom surface; 223, first side surface; 220a, first accommodating cavity; 230, first connecting arm; 230a, second accommodating cavity; 240, lug; 241, connecting part; 242, positioning lug; 240a, accommodating gap; 240b, engaging groove; 250, connecting end 261, first pin shaft; 262, second pin shaft; 300, locking device; 310, second swing arm; 311, second top surface; 312, second bottom surface; 313, second side surface; 314, mounting protrusion; 320, first swing arm; 321, first swing end; 322, second swing end; 3221, guide groove; 330, locking member; 331, locking end; 332, rotating end; 341, engaging block; 342, connecting rod; 3421, Mounting end; 400, limiting structure; 410, matching part; 420, positioning part; 421, first positioning part; 422, second positioning part; 20, ventricular assist device; 20a, inlet tube; 20b, outlet tube; 30, clamp; 30a, first clamping arm; E, first handle part; F, second handle part; 30b, second clamping arm; P, first notch; Q, second notch; X, first rotation axis; Y, second rotation axis; I, center axis. DETAILED DESCRIPTION

[0046] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0047] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0048] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0050] like Figures 1 to 3 As shown, an embodiment of the present application provides a ventricular connection mechanism 10, which is used to install an implantable ventricular assist device 20 on the outer wall of the heart. The ventricular connection mechanism 10 includes a suture ring 100, a clamping ring 200 and a locking device 300.

[0051] The sewing ring 100 is a mounting component of the ventricular connection mechanism 10, and can be sutured to the outer wall of the heart using sutures, thereby achieving the fixation of the implantable ventricular assist device 20 on the heart. Figure 2As shown, the sewing ring 100 may have a first through hole 100a and a suture area 100b surrounding the first through hole 100a, and the suture area 100b has a plurality of suture marks 100c along the circumference of the sewing ring 100, and the suture marks 100c are provided to facilitate the control of the suture density. The sewing ring 100 may be provided in an annular shape, and its inner circumference may be provided to surround the first through hole 100a. In some embodiments, the sewing ring 100 may include an annular cushion and a fabric layer wrapped around the annular cushion, for example, the annular cushion is an implant-grade silicone member; and the fabric layer is polyester cloth. Exemplarily, Figure 2 The area enclosed by the two circular dotted lines is the suture area 100 b of the suture ring 100 .

[0052] The sewing ring 100 has a mounting surface 110 for mounting the clamping ring 200, and the suturing area 100b and the suturing mark 100c are both disposed on the mounting surface 110. When the sewing ring 100 is sutured to the heart, the mounting surface 110 is the surface of the sewing ring 100 that is away from the outer wall of the heart.

[0053] The clamping ring 200 is disposed on the sewing ring 100, and the clamping ring 200 is in contact with the mounting surface 110. The clamping ring 200 is used to clamp the implantable ventricular assist device 20 (for example, the inlet tube 20a of the ventricular assist device 20). Figure 1 and Figure 2 As shown, the clamping ring 200 includes a ring body 210 and a connecting end 250 , wherein the ring body 210 is disposed on the sewing ring 100 and has a central axis I. The sewing area 100 b is located on the outer periphery of the ring body 210 .

[0054] In this embodiment, the connecting end portion 250 extends toward the suture area 100b along the radial direction of the ring body 210. In other embodiments, the connecting end portion 250 may also extend in the axial direction of the ring body 210 in a direction away from the suture ring 100. The connecting end portion 250 includes a first connecting arm 230 and a second connecting arm 220 spaced apart along the circumferential direction of the ring body 210, and the first connecting arm 230 and the second connecting arm 220 may both be connected to the locking device 300.

[0055] The ring body 210 is an open ring, and the first connecting arm 230 and the second connecting arm 220 are respectively fixed to two opposite ends of the open ring in the circumferential direction, so that the change in the distance between the first connecting arm 230 and the second connecting arm 220 can cause the change in the inner diameter of the ring body 210.

[0056] In this embodiment, the axial direction of the ring body 210 is the extension direction of the central axis I of the ring body 210, and the radial direction of the ring body 210 refers to the radius or diameter direction of the ring body 210, or the direction perpendicular to the extension direction of the central axis I. The circumferential direction of the ring body 210 refers to the circumferential direction around the central axis I of the ring body 210.

[0057] The ring body 210 is surrounded by a second through hole 210a with an adjustable diameter (see Figure 1 ), the second through hole 210a is used for the inlet tube 20a to pass through, so that the ring body 210 can clamp the inlet tube 20a. The second through hole 210a corresponds to the first through hole 100a, so that the inlet tube 20a can pass through the sewing ring 100 and extend into the heart, so that the blood in the heart can flow into the ventricular assist device 20 through the inlet tube 20a and be discharged from the outlet tube 20b of the ventricular assist device 20.

[0058] See also Figure 4 The ring body 210 may be an annular structure with a head end 211 and a tail end 212 spaced apart, and the head end 211 and the tail end 212 of the ring body 210 are respectively provided with a second connecting arm 220 and a first connecting arm 230 protruding toward the suture area 100b. The aperture size of the second through hole 210a of the ring body 210 can be adjusted by adjusting the width between the head end 211 and the tail end 212 of the ring body 210, so that the ring body 210 is in a clamping state or a non-clamping state.

[0059] In order to facilitate the adjustment of the spacing width between the head end 211 and the tail end 212 of the ring body 210, as shown in FIG. Figure 5 and Figure 6 As shown, the ring body 210 has an arcuate groove 210b, which extends from one end of the ring body 210 (for example, the tail end 212 of the ring body 210) to the middle of the ring body 210 along the circumferential direction. Figure 6 The outer ring portion 213 of the ring body 210 is divided into a first half ring 2131 and a second half ring 2132 by taking the dotted line II in FIG. 2 as the boundary. The first half ring 2131 has a first radial width L1, and the second half ring 2132 has a second radial width L2, and the second radial width L2 is greater than the first radial width L1. It should be noted that the middle portion of the ring body 210 refers to the portion between the head end 211 and the tail end 212. The provision of the arc groove 210b facilitates the deformation of the tail end 212 of the ring body 210, making the interval width between the head end 211 and the tail end 212 easier to adjust.

[0060] See also Figure 5 , the portion outside the dotted circle of the ring body 210 represents the outer ring portion 213 of the ring body 210, and the portion inside the dotted circle represents the inner ring portion 214 of the ring body 210. The outer ring portion 213 and the inner ring portion 214 of the ring body 210 can both be regarded as a ring structure with an opening, and the opening position of the inner ring portion 214 corresponds to the opening position of the outer ring portion 213. It can be understood that the opening of the inner ring portion 214 can be formed by the head and tail of the inner ring portion 214, and the opening of the outer ring portion 213 can be formed by the head and tail of the outer ring portion 213.

[0061] It should be noted that the center angles of the first half ring 2131 and the second half ring 2132 are not necessarily both 180°, and can be set accordingly according to the requirements for the clamping force of the ring body 210. If a greater clamping force is required, the center angle of the first half ring 2131 is greater than the center angle of the second half ring 2132, and the inner ring portion 214 of the ring body 210 can be deformed more easily by extending the arc groove 210b; and if a smaller clamping force is required, the center angle of the first half ring 2131 is greater than the center angle of the second half ring 2132.

[0062] In order not to affect the deformation of the inner ring portion 214, the outer ring portion 213 of the ring body 210 can be connected to the sewing ring 100, wherein the outer ring portion 213 can be sutured on the sewing ring 100 using sutures. Figure 5 As shown, the inner ring portion 214 is provided with a plurality of first suture holes M along the circumferential direction, and the second half ring 2132 of the outer ring portion 213 is provided with a plurality of second suture holes N along the circumferential direction, and both the first suture holes M and the second suture holes N are used for threading sutures. Of course, in some other embodiments, the outer ring portion 213 of the ring body 210 can also be connected to the suture ring 100 by bonding.

[0063] The locking device 300 is connected to the connecting end portion 250, and the locking device 300 adjusts the inner diameter of the clamping ring 200. Specifically, the locking device 300 is connected to the side of the connecting end portion 250 that is away from the ring body 210, and the locking device 300 can adjust the aperture size of the second through hole 210a and keep the aperture size of the second through hole 210a unchanged. The locking device 300 can clamp and lock the inlet tube 20a of the ventricular assist device 20 in the second through hole 210a of the clamping ring 200, which can prevent the ventricular assist device 20 from falling off the clamping ring 200 and prevent blood leakage between the clamping ring 200 and the inlet tube 20a of the ventricular assist device 20.

[0064] In this embodiment, the locking device 300 can rotate relative to the connecting end 250, so that the locking device 300 can switch between a flat state and a flipped state. In the flat state, the locking device 300 is located on the outer periphery of the ring body 210 and protrudes radially along the ring body 210; in the flipped state, the side of the locking device 300 away from the connecting end 250 is farther away from the suture ring 100 than in the flat state, so that the part of the suture area 100b that is blocked by the locking device 300 is exposed. That is, in the flipped state, the side of the locking device 300 away from the connecting end 250 can move in a direction away from the suture area 100b, thereby avoiding the suture area 100b (see Figure 3 and Figure 7 ), which facilitates the suturing of the sewing ring 100 to the outer wall of the heart.

[0065] In this embodiment, in the flipped state, the locking device 300 is erected substantially along the axial direction of the ring body 210 on the side facing away from the sewing ring 100, so that the locking device 300 can avoid the suture area 100b as much as possible. In other embodiments, the locking device 300 can also be flipped at a smaller angle relative to the sewing ring 100, for example, 30° or 45°, so that the side of the locking device 300 away from the connecting end 250 is further away from the sewing ring 100 than in the flat state, so as to meet the purpose of avoiding the suture area 100b.

[0066] When the sewing ring 100 of the ventricular connection mechanism 10 is sutured to the outer wall of the heart, the locking device 300 can be rotated relative to the clamping ring 200 to allow the locking device 300 to avoid the suture area 100b of the sewing ring 100, that is, the locking device 300 is erected from the sewing ring 100 to avoid the locking device 300 hindering the suture of the sewing ring 100, and then the sewing ring 100 is sutured to the outer wall of the heart. In this way, the ventricular connection mechanism 10 is evenly sutured to the outside of the heart, and the probability of blood leakage caused by uneven suture can be reduced.

[0067] It can be seen that in the above-mentioned ventricular connection mechanism 10, the locking device 300 is rotatably connected to the connecting end 250 of the clamping ring 200, so that the locking device 300 can be switched between a flat state and a flipped state. In the flipped state, the side of the locking device 300 away from the connecting end 250 is further away from the sewing ring 100 than in the flat state, so that the part of the suture area 100b blocked by the locking device 300 is exposed, thereby avoiding the suture area 100b of the sewing ring 100, avoiding interference with the suture of the sewing ring 100, facilitating uniform suture of the sewing ring 100, and reducing the probability of bleeding caused by uneven suture.

[0068] See also Fig.11 and Fig.12 The locking device 300 includes a first swing arm 320, a second swing arm 310, a connecting rod 342 and a locking member 330. The first swing arm 320 is rotatably connected to the first connecting arm 230, the second swing arm 310 is rotatably connected to the second connecting arm 220, and the connecting rod 342 is connected to the second swing arm 310.

[0069] The first swing arm 320 includes a first swing end 321 and a second swing end 322 opposite to each other. The first swing end 321 is rotatably connected to the first connecting arm 230. The second swing end 322 is disposed at an end of the first swing arm 320 that is away from the first connecting arm 230. The first swing arm 320 is provided with a guide groove 3221. The connecting rod 342 can movably pass through the guide groove 3221 and has a mounting end 3421 away from the engaging block 341. In this embodiment, the guide groove 3221 is disposed at the second swing end 322. In other embodiments, the guide groove 3221 can also be disposed between the first swing end 321 and the second swing end 322.

[0070] One end of the second swing arm 310 is rotatably connected to the second connecting arm 220, and a clamping block 341 is provided at one end of the second swing arm 310 away from the second connecting arm 220. One end of the connecting rod 342 is fixedly connected to the second swing arm 310, and illustratively, the connecting rod 342 extends from one end of the clamping block 341 toward the first swing arm 320. The other end of the connecting rod 342 is rotatably connected to the locking member 330, and the middle part of the connecting rod 342 can be slidably penetrated in the guide groove 3221, so that the movement of the first swing arm 320 will not be stopped by the connecting rod 342.

[0071] Continue to see Fig.11 and Fig.12 The locking member 330 has a rotating end 332 and a locking end 331. The rotating end 332 is rotatably connected to the mounting end 3421 of the connecting rod 342, and the rotating end 332 can be rotatably abutted against the first swing arm 320, and the locking end 331 can be engaged with the second swing arm 310. When the locking member 330 rotates relative to the first swing arm 320, the distance between the first swing arm 320 and the second swing arm 310 can be adjusted, so as to adjust the distance between the first connecting arm 230 and the second connecting arm 220, so as to adjust the inner diameter of the ring body 210. The locking end 331 engages with the second swing arm 310 to prevent the distance between the first connecting arm 230 and the second connecting arm 220 from increasing, so as to maintain the relative position of the second swing arm 310 and the second swing arm 310, and keep the distance between the second swing arm 310 and the first swing arm 320 unchanged, so as to maintain the clamping ring 200 in a clamping state, thereby clamping and fixing the inlet tube 20a of the ventricular assist device 20.

[0072] The rotating end 332 of the locking member 330 is configured to be cam-shaped, and the rotating end 332 can be rotatably abutted against the side of the first swing arm 320 away from the second swing arm 310, so that when the rotating end 332 rotates, it can push the first swing arm 320 to move toward the second swing arm 310 to reduce the inner diameter of the ring body 210.

[0073] When the locking member 330 rotates, the rotating end 332 of the locking member 330 abuts against the second swing end 322 of the first swing arm 320, so that the second swing end 322 drives the second connecting arm 220 to move toward the first connecting arm 230, thereby reducing the distance between the first connecting arm 230 and the second connecting arm 220, so as to adjust the aperture size of the second through hole 210a and realize the switching between the clamping state and the non-clamping state of the clamping ring 200. That is, in this embodiment, only the locking member 330 needs to be rotated to reduce the distance between the first connecting arm 230 and the second connecting arm 220, and there is no need to drive the locking member 330 to move, so that the locking operation of the locking device 300 is simpler and more labor-saving.

[0074] In this embodiment, if Figure 4 As shown, the end of the second connecting arm 220 close to the second swing arm 310 has a first accommodating cavity 220a, and the second swing arm 310 has a mounting protrusion 314 protruding toward the second connecting arm 220. The mounting protrusion 314 extends into the first accommodating cavity 220a and is rotatably connected to the second connecting arm 220 through the first pin 261. Of course, in other embodiments, the end of the second swing arm 310 close to the second connecting arm 220 has a first accommodating cavity 220a, and the second connecting arm 220 extends into the first accommodating cavity 220a and is rotatably connected to the second swing arm 310 through the first pin 261.

[0075] In this embodiment, the first pin 261 is disposed on the second connecting arm 220, and the second swing arm 310 is rotatably connected to the first pin 261. In other embodiments, the first pin 261 is disposed on the second swing arm 310, and the first pin 261 is rotatably connected to the second connecting arm 220.

[0076] The first connecting arm 230 has a second accommodating cavity 230a at one end close to the first swing arm 320, and a protrusion may also be provided at the first swing end 321, which extends into the second accommodating cavity 230a and is rotatably connected to the first connecting arm 230 through the second pin 262. Of course, in other embodiments, the first swing arm 320 has a second accommodating cavity 230a at one end close to the first connecting arm 230, and the first connecting arm 230 extends into the second accommodating cavity 230a and is rotatably connected to the first swing arm 320 through the second pin 262.

[0077] In this embodiment, the second pin 262 is disposed on the first connecting arm 230, and the first swing arm 320 is rotatably connected to the second pin 262. In other embodiments, the second pin 262 is disposed on the first swing arm 320, and the second pin 262 is rotatably connected to the first connecting arm 230.

[0078] like Figure 8 and Fig. 9As shown, in some embodiments of the present application, the ventricular connection mechanism 10 further includes a limiting structure 400, which is disposed on at least one of the connection end 250 and the locking device 300 to limit the rotation angle of the locking device 300 relative to the connection end 250. That is, the limiting structure 400 is disposed on at least one of the second connection arm 220 and the second swing arm 310; or, is disposed on at least one of the first connection arm 230 and the first swing arm 320; or, is disposed on at least one of the second connection arm 220 and the second swing arm 310, and is also disposed on at least one of the first connection arm 230 and the first swing arm 320.

[0079] By providing the limiting structure 400 , during the process of suturing the clamping ring 200 , the locking device 300 can be prevented from rotating relative to the connecting end 250 , which is beneficial to the smooth suturing of the suturing ring 100 or the smooth installation of the ventricular assist device 20 .

[0080] In some embodiments of the present application, the limiting structure 400 includes a matching portion 410 disposed on the locking device 300, and a positioning portion 420 disposed on the connecting end portion 250. When the locking device 300 is rotated to a flat state or a flipped state, the positioning portion 420 can be engaged with the matching portion 410 to lock the locking device 300 in a flat state or a flipped state. Exemplarily, when the locking device 300 is rotated to a flipped state, the positioning portion 420 and the matching portion 410 are engaged to prevent the locking device 300 from rotating relative to the connecting end portion 250, which is beneficial to the smooth suturing of the sewing ring 100. When the locking device 300 is rotated to a flat state, the positioning portion 420 and the matching portion 410 are engaged to prevent the locking device 300 from rotating relative to the connecting end portion 250, which is beneficial to the smooth installation of the ventricular assist device 20.

[0081] One of the matching portion 410 and the positioning portion 420 is a protruding structure, and the other is a recessed structure. In this embodiment, the positioning portion 420 is a protruding structure, and the matching portion 410 is a recessed structure. When the locking device 300 is rotated relative to the sewing ring 100 to a flipped state, the positioning portion 420 can be inserted into the matching portion 410, so that the locking device 300 is maintained in the flipped state. In other embodiments, the positioning portion 420 can be a recessed structure, and correspondingly, the matching portion 410 can be a protruding structure.

[0082] In this embodiment, the matching portion 410 is provided on the second swing arm 310, and the positioning portion 420 is provided on the second connecting arm 220. In one embodiment, the matching portion 410 is provided on the first swing arm 320, and the positioning portion 420 is provided on the first connecting arm 230. In another embodiment, the matching portion 410 is provided on the first swing arm 320 and the second swing arm 310, and the positioning portion 420 is provided on the first connecting arm 230 and the second connecting arm 220.

[0083] like Figure 8 and Fig. 9 As shown, the connecting end 250 (specifically the second connecting arm 220) has a first top surface 221 facing away from the mounting surface 110 and a first bottom surface 222 facing the mounting surface 110, and a first side surface 223 connected to the first top surface 221 and the first bottom surface 222, and the first side surface 223 faces away from the central axis I of the ring body 210 along the radial direction of the ring body 210.

[0084] The second swing arm 310 has a second bottom surface 312 that can be opposite to the mounting surface 110, a second top surface 311 opposite to the second bottom surface 312, and a second side surface 313 connected to the second top surface 311 and the second bottom surface 312, wherein when the locking device 300 is rotated to a flat state relative to the sewing ring 100, the second bottom surface 312 is opposite to the mounting surface 110. In this embodiment, the matching portion 410 is disposed on the second side surface 313.

[0085] In this embodiment, the positioning portion 420 includes a first positioning portion 421 disposed on the first top surface 221. When the locking device 300 rotates relative to the sewing ring 100 to the flipped state, the second side surface 313 of the second swing arm 310 can face the first top surface 221 of the second connecting arm 220, so that the matching portion 410 on the second side surface 313 can be engaged with the first positioning portion 421 on the first top surface 221, so as to lock the locking device 300 in the flipped state.

[0086] Furthermore, in order to prevent the locking device 300 from continuing to rotate after rotating to the flat state and affecting the installation of the ventricular assist device 20, the positioning portion 420 also includes a second positioning portion 422 disposed on the first side surface 223. When the locking device 300 rotates to the flat state, the second side surface 313 of the second swing arm 310 can face the first side surface 223 of the second connecting arm 220, so that the matching portion 410 on the second side surface 313 can be engaged with the second positioning portion 422 on the first side surface 223, thereby locking the locking device 300 and locking the locking device 300 in the flat state, which can not only avoid interference with the installation of the ventricular assist device 20 on the clamping ring 200, but also avoid unnecessary rotation of the locking device 300 after the ventricular assist device 20 is implanted in the body.

[0087] In this embodiment, the first connecting arm 230 and the second connecting arm 220 have substantially the same structure, and also have a first top surface 221, a first bottom surface 222, and a first side surface 223. The first positioning portion 421 can be disposed on the first top surface 221 of the first connecting arm 230, and the second positioning portion 422 can be disposed on the first side surface 223 of the first connecting arm 230. The first swing arm 320 also has substantially the same structure as the second swing arm 310, and also has a second top surface 311, a second bottom surface 312, and a second side surface 313. The matching portion 410 can be disposed on the second side surface 313 of the first swing arm 320.

[0088] In this embodiment, the matching portion 410 is disposed on the second swing arm 310, and the first positioning portion 421 and the second positioning portion 422 are both disposed on the second connecting arm 220. In one embodiment, the matching portion 410 is disposed on the first swing arm 320, and the first positioning portion 421 and the second positioning portion 422 are both disposed on the first connecting arm 230. In another embodiment, the matching portion 410 includes two, one of which is disposed on the first swing arm 320 and the other is disposed on the second swing arm 310, the first positioning portion 421 is disposed on the first connecting arm 230, and the second positioning portion 422 is disposed on the second connecting arm 220.

[0089] In one embodiment of the present application, Figure 1 , Figure 2 and Fig.10 As shown, when the inlet tube 20a of the ventricular assist device 20 is installed on the ventricular connecting mechanism 10, the locking device 300 can be rotated relative to the suture ring 100 to a flat state, so that the locking device 300 is at least partially located in the suture area 100b. In this way, the locking device 300 can be kept away from the inlet tube 20a of the ventricular assist device 20, avoiding interference between the locking device 300 and the inlet tube 20a of the ventricular assist device 20 and affecting the installation of the ventricular assist device 20 on the clamping ring 200.

[0090] In some embodiments, Figure 7 As shown, the ring body 210 has a third top surface 217 facing away from the sewing ring 100. When the locking device 300 is in the flipped state, a first angle α is formed between the locking device 300 and the third top surface 217, wherein α≤90°. When the locking device 300 is in the flipped state, since α is less than or equal to 90°, the locking device 300 can rotate toward the inlet tube 20a of the ventricular assist device 20 under the action of its own gravity, which makes the locking device 300 further away from the sewing ring 100. Therefore, when the sewing ring 100 is sutured, the probability of the locking device 300 rotating to a flat state under the action of its own gravity can be reduced.

[0091] In order to make the locking device 300 as close to the sewing ring 100 as possible when it is laid flat, Figure 4As shown, in some embodiments, the first swing arm 320 has a first rotation axis X that rotates around the second connecting arm 220, and the first rotation axis X is parallel to the surface of the sewing ring 100 facing the clamping ring 200, that is, the first rotation axis X is parallel to the mounting surface 110. In this way, when the locking device 300 is rotated relative to the sewing ring 100 to a flat state, the locking device 300 can contact the sewing ring 100, so that the locking device 300 can be away from the ventricular assist device 20 to avoid interference with the installation of the ventricular assist device 20.

[0092] like Figure 1 As shown, the rotating end 332 of the locking member 330 has a second rotating axis Y rotating around the first swing arm 320. In the flat state, the second rotating axis Y is perpendicular to the mounting surface 110, so that the locking member 330 can rotate along the circumference of the ring body 210, avoiding the locking member 330 from abutting against the ventricular assist device 20 installed on the clamping ring 200 during the locking process, so that the locking member 330 can be locked smoothly. In the flipped state, the second rotating axis Y intersects or is parallel to the mounting surface 110.

[0093] like Fig.10 As shown, when the locking device 300 is in a flat state, there is a second angle β between the second connecting arm 220 and the second swing arm 310 as well as between the first connecting arm 230 and the first swing arm 320, and the second angle β is approximately equal to 180°.

[0094] like Figure 5 As shown, the ring body 210 has an outer peripheral wall 216. In some embodiments, the clamping ring 200 further includes a lug 240, and the lug 240 and the connecting end 250 are both disposed on the outer peripheral wall 216, wherein the lug 240 can be clamped by the clamp 30.

[0095] like Fig.13 and Fig.14 As shown, the lug 240 that clamps the clamp 30 on the clamp ring 200 allows the operator to clamp and support the clamp ring 200 by operating the clamp 30, which facilitates the installation of the ventricular assist device 20 on the clamp ring 200.

[0096] The clamp 30 includes a first clamp arm 30a and a second clamp arm 30b. The first clamp arm 30a has a first handle E at one end away from the clamp ring 200, and the second clamp arm 30b has a second handle F at one end away from the clamp ring 200. The middle of the first clamp arm 30a is hinged to the middle of the second clamp arm 30b. The end of the first clamp arm 30a close to the clamp ring 200 has a first notch P (see FIG. Fig.15 ), the end of the second clamping arm 30b close to the clamping ring 200 has a second notch Q (see Fig.15), when the end of the first clamping arm 30a close to the clamping ring 200 and the end of the second clamping arm 30b close to the clamping ring 200 rotate toward each other, the first notch P and the second notch Q are connected to form a receiving groove. The clamp 30 of this structure is not only convenient for operators to hold, but also can clamp the lug 240 on the clamping ring 200 more firmly.

[0097] Based on the above clamp 30, as Fig.16 As shown, in some embodiments, the lug 240 includes a connecting portion 241 and a positioning lug 242, the connecting portion 241 is protruding from the outer peripheral wall 216 of the ring body 210, and the positioning lug 242 is disposed on a side of the connecting portion 241 away from the outer peripheral wall 216. In this embodiment, the positioning lug 242 extends from the side of the connecting portion 241 in a direction away from the connecting portion 241, and can be accommodated in the receiving groove of the clamp 30.

[0098] The circumferential width W2 of the positioning ear portion 242 is greater than the circumferential width W1 of the connecting portion 241, so that an accommodation gap 240a is formed between the positioning ear portion 242 and the outer peripheral wall 216 of the ring body 210. When the clamp 30 clamps the lug 240, the connecting portion 241 of the lug 240 is clamped by the first clamping arm 30a and the second clamping arm 30b of the clamp 30, and at the same time, the positioning ear portion 242 of the lug 240 is also clamped in the accommodation groove of the clamp 30. It can be seen that the lug 240 is clamped by the clamp 30 at two locations, which can increase the clamping force of the clamp 30 on the lug 240.

[0099] Continue to see Fig.16 The joint between the connecting portion 241 and the positioning ear portion 242 has a snap-fitting groove 240b. When the clamp 30 clamps the lug 240, the corners of the first clamping arm 30a close to the ring body 210 and the corners of the second clamping arm 30b close to the ring body 210 are clamped into the snap-fitting groove 240b of the lug 240, which can further increase the clamping force of the clamp 30 on the lug 240.

[0100] The lug 240 is a non-angular structure, and the connection between the lug 240 and the outer surface of the clamping ring 200 is also rounded. This arrangement can not only eliminate deformation or breakage caused by internal stress, increase the connection strength between the lug 240 and the clamping ring 200, and reduce the probability of the lug 240 breaking from the clamping ring 200 when the clamp 30 applies force to the lug 240; it can also prevent scratching of biological tissue when the ventricular assist device 20 and the ventricular connection mechanism 10 are implanted in the body.

[0101] like Fig.15As shown, when the lug 240 is clamped by the clamp 30, the end surface of the first clamping arm 30a close to the clamping ring 200 and the end surface of the second clamping arm 30b close to the clamping ring 200 can abut against the outer wall 216 of the clamping ring 200 to improve the clamping firmness of the clamp 30.

[0102] like Figure 4 As shown, the peripheral wall 216 includes a tangent plane 2161 and an arc surface 2162 connected to the tangent plane 2161, and the lug 240 is convexly provided on the tangent plane 2161 along the radial direction of the ring body 210, that is, the lug 240 is convexly provided on the tangent plane 2161 in a direction away from the central axis I of the ring body 210. In this way, the peripheral wall 216 of the clamping ring 200 can be in surface contact with the surface of the clamp 30 close to the clamping ring 200. Compared with the point contact between the plane and the arc surface, the surface contact makes it difficult for the clamp 30 to rotate relative to the clamping ring 200.

[0103] In some embodiments, the lugs 240 may be provided in a plurality and respectively disposed on the first half ring 2131 and the second half ring 2132 of the clamping ring 200. Providing a plurality of lugs 240 allows the clamp 30 to clamp different positions of the clamping ring 200, so that the ventricular assist device 20 can be installed on the clamping ring 200 from different angles, thereby improving the flexibility of installing the ventricular assist device 20.

[0104] The number of lugs 240 can be set accordingly as required, as long as it does not affect the installation of the ventricular assist device 20 on the clamping ring 200. Figure 4 As shown, the lugs 240 can be set to two, and illustratively, the lugs 240 include a first lug 2401 and a second lug 2402, and the first lug 2401 and the second lug 2402 are arranged at intervals along the circumference of the ring body 210. The first lug 2401 is arranged on the outer circumference of the first half ring 2131, and the second lug 2402 is arranged on the outer circumference of the second half ring 2132. The outer circumference of the first half ring 2131 and the outer circumference of the second half ring 2132 are both parts of the outer circumferential wall 216 of the ring body 210.

[0105] like Figure 5 As shown, there is a first distance H1 between the first lug 2401 and the central axis I of the ring body 210, and a second distance H2 between the second lug 2402 and the central axis I of the ring body 210, wherein H2

[0106] ​It should be noted that the radial width of the first half ring 2131 is smaller than the radial width of the second half ring 2132. In order to avoid the first lug 2401 from the sewing area 100b of the sewing ring 100, it is necessary to further reduce the radial width of the first half ring 2131. This makes the strength of the first half ring 2131 unable to meet the requirements. Therefore, there is no need to avoid the first lug 2401 from the sewing area 100b of the sewing ring 100.

[0107] It is understandable that in order to keep the second lug 2402 away from the suture area 100b of the suture ring 100, it is also necessary to reduce at least part of the radial width of the second half ring 2132 accordingly, which also weakens the strength of the second half ring 2132. In order to ensure that the strength of the second half ring 2132 meets the requirements, the position of the suture hole on the second half ring 2132 can be improved accordingly.

[0108] Specifically, Figure 5 As shown, the first half ring 2131 and the second half ring 2132 are provided with a plurality of first suture holes M along the circumference thereof on the side away from the second connecting arm 220, and the second half ring 2132 is provided with a plurality of second suture holes N along the circumference thereof on the side close to the second connecting arm 220 (i.e., the part provided with the second lug 2402), wherein the distance between two adjacent first suture holes M is equal, which is defined as the third distance H3, and the distance between two adjacent second suture holes N is also equal, which is defined as the fourth distance H4, wherein H4>H3. By increasing the distance between two adjacent second suture holes N, the suture holes on the second half ring 2132 are provided more sparsely, thereby minimizing the influence on the strength of the second half ring 2132.

[0109] It should be noted that, in the present embodiment, the first suture hole M and the second suture hole N are both circular holes, the distance between two adjacent first suture holes M refers to the distance between the centers of the two adjacent first suture holes M, and the distance between two adjacent second suture holes N refers to the distance between the centers of the two adjacent second suture holes N.

[0110] Another embodiment of the present application provides a ventricular assist system, including a ventricular assist device 20 and a ventricular connection mechanism 10 as in any of the above embodiments; the ventricular assist device 20 is disposed on a clamping ring 200 of the ventricular connection mechanism 10 and is locked by a locking device 300 of the ventricular connection mechanism 10.

[0111] In the ventricular assist system, the locking device 300 of the ventricular connection mechanism 10 can be switched between a flat state and a flipped state relative to the clamping ring 200, so that the locking device 300 can avoid the installation of the ventricular assist device 20 and the suturing of the sewing ring 100, which is convenient for uniform suturing of the sewing ring 100 and can reduce the chance of bleeding due to uneven suturing.

[0112] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0113] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A ventricular connection mechanism, characterized in that: include: A sewing ring, the sewing ring having a first through hole and a sewing area surrounding the first through hole; A clamping ring, the clamping ring comprising a connected ring body and a connecting end, the ring body is arranged on the sewing ring, and the sewing area is located at the outer periphery of the ring body; and A locking device, the locking device is connected to the connecting end, and the locking device can adjust the inner diameter of the ring body; The locking device can rotate relative to the connecting end, so that the locking device can switch between a flat state and a flipped state; Wherein, in the flat state, the locking device is located at the outer periphery of the ring body and protrudes radially along the ring body; in the flipped state, the side of the locking device away from the connecting end is farther away from the sewing ring than in the flat state, so that the part of the sewing area covered by the locking device is exposed.

2. The ventricular connection mechanism according to claim 1, characterized in that: The connecting end portion includes a first connecting arm and a second connecting arm spaced apart along the circumference of the ring body; The locking device includes a first swing arm, a second swing arm, a connecting rod and a locking piece, the first swing arm is rotatably connected to the first connecting arm, the second swing arm is rotatably connected to the second connecting arm, the connecting rod is connected to the second swing arm, and the locking piece has a rotating end and a locking end, the rotating end is rotatably connected to the connecting rod, and the rotating end can be rotatably abutted against the first swing arm, and the locking end can be engaged with the second swing arm; wherein, when the locking piece rotates relative to the first swing arm, the distance between the first swing arm and the second swing arm can be adjusted to adjust the distance between the first connecting arm and the second connecting arm, so as to adjust the inner diameter of the ring body, and the locking end is engaged with the second swing arm to prevent the distance between the first connecting arm and the second connecting arm from increasing.

3. The ventricular connection mechanism according to claim 2, characterized in that: The ring body is an open ring, and the first connecting arm and the second connecting arm are respectively fixed to the two opposite ends of the open ring in the circumferential direction; the first swing arm is provided with a guide groove, one end of the connecting rod is fixed to the second swing arm, and the other end is rotatably connected to the locking member, and the middle part of the connecting rod can be slidably passed through the guide groove; the rotating end of the locking member is cam-shaped, and the rotating end can be rotatably abutted against the side of the first swing arm that is away from the second swing arm.

4. The ventricular connection mechanism according to claim 2, characterized in that: The sewing ring has a mounting surface for mounting the clamping ring, wherein: The first swing arm has a first rotation axis that rotates around the second connecting arm, and the first rotation axis is parallel to the mounting surface; and / or, The rotating end of the locking member has a second rotating axis that rotates around the first swing arm. In the flat state, the second rotating axis is perpendicular to the mounting surface; in the flipped state, the second rotating axis intersects or is parallel to the mounting surface.

5. The ventricular connection mechanism according to claim 1, characterized in that: The ventricular connection mechanism also includes a limiting structure, which includes a positioning portion arranged at the connection end and a matching portion arranged at the locking device. The positioning portion can be engaged with the matching portion to lock the locking device in the flat state or the flipped state.

6. The ventricular connection mechanism according to claim 5, characterized in that: The connecting end portion has a first top surface facing away from the sewing ring, the positioning portion includes a first positioning portion arranged on the first top surface, and in the flipped state, the matching portion can be engaged with the first positioning portion to lock the locking device in the flipped state; And / or, the connecting end portion has a first side surface radially facing away from the central axis of the ring body, the positioning portion includes a second positioning portion arranged on the first side surface, and in the flat state, the matching portion can be engaged with the second positioning portion to lock the locking device in the flat state; And / or, one of the matching portion and the positioning portion is configured as a protruding structure, and the other is configured as a recessed structure.

7. The ventricular connection mechanism according to claim 5, characterized in that: The connecting end portion includes a first connecting arm and a second connecting arm, the locking device includes a first swing arm, a second swing arm, a connecting rod and a locking member, the first swing arm is rotatably connected to the first connecting arm, the second swing arm is rotatably connected to the second connecting arm, the connecting rod is connected to the second swing arm, the locking member has a rotating end and a locking end, the rotating end is rotatably connected to the connecting rod, and the rotating end can be rotatably abutted against the first swing arm, and the locking end can be engaged with the second swing arm; wherein: The matching portion is arranged on the first swing arm, and the positioning portion is arranged on the first connecting arm; Alternatively, the matching portion is arranged on the second swing arm, and the positioning portion is arranged on the second connecting arm.

8. The ventricular connection mechanism according to claim 1, characterized in that: The ring body has a third top surface facing away from the sewing ring. When the locking device is in the flipped state, a first angle α is formed between the locking device and the third top surface, wherein α≤90°.

9. The ventricular connection mechanism according to any one of claims 1 to 8, characterized in that: The ring body has an outer peripheral wall, and the clamping ring further comprises a lug, wherein the lug and the connecting end are both arranged on the outer peripheral wall, and the lug can be clamped by a clamp.

10. The ventricular connection mechanism according to claim 9, characterized in that: The outer peripheral wall comprises a tangent plane and an arc surface connected to the tangent plane, and the lug is convexly arranged on the tangent plane along the radial direction of the ring body; And / or, the lug includes a first lug and a second lug, the first lug and the second lug are spaced apart along the circumference of the ring body, the first lug has a first distance H1 from the central axis of the ring body, the second lug has a second distance H2 from the central axis of the ring body, wherein H2<H1.

11. A ventricular assist system, characterized in that: It comprises a ventricular assist device and a ventricular connection mechanism as described in any one of claims 1 to 10; the ventricular assist device is arranged on the clamping ring of the ventricular connection mechanism and is locked by the locking device of the ventricular connection mechanism.

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