Ventricular connection mechanism and ventricular assistance system

Abstract

A ventricular connection mechanism (10), comprising a suture ring (100), a clamping ring (200) and a locking device (300). The suture ring (100) is provided with a suture region (100b). The clamping ring (200) comprises a ring body (210) and a connection end portion (250) which are connected, the ring body (210) being arranged on the suture ring (100), and the suture region (100b) being located on the periphery of the ring body (210). The locking device (300) can rotate relative to the connection end portion (250), so as to switch the locking device (300) between a laid-flat state and a flipped state. In the laid-flat state, the locking device (300) is located on the periphery of the ring body (210) and protrudes in the radial direction of the ring body (210). The side of the locking device (300) away from the connection end portion (250) in the flipped state is farther away from the suture ring (100) than that in the laid-flat state.

Description

Ventricular connection mechanism and ventricular assist system

[0001] This application claims priority to Chinese patent application No. 202411610000.3, filed on November 12, 2024, with the Chinese Patent Office, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of medical device technology, and more specifically, to a ventricular connection mechanism and a ventricular assist system. Background Technology

[0003] In blood pump implantation surgery, a ventricular connector is typically used to secure the blood pump to the heart. Specifically, the suture ring of the ventricular connector is first sutured to the outer wall of the heart, and then the blood pump is installed onto the ventricular connector. However, the suture rings of traditional ventricular connectors are inconvenient to suture and are prone to leakage due to uneven suturing. Summary of the Invention

[0004] Based on this, this application provides a ventricular connection mechanism and a ventricular assist system that can reduce the probability of bleeding due to uneven suturing.

[0005] An embodiment of the first aspect of this application provides a ventricular connection mechanism, the ventricular connection mechanism comprising:

[0006] A suture ring having a suture area;

[0007] A clamping ring, comprising a connected ring body and a connecting end, the ring body being disposed on the suture ring, the suture area being located on the outer periphery of the ring body; and

[0008] A locking device is connected to the connecting end, and the locking device is capable of adjusting the inner diameter of the ring body; the locking device is capable of rotating relative to the connecting end so that the locking device can switch between a flat state and a flipped state;

[0009] In the flat position, the locking device is located on the outer periphery of the ring and protrudes radially along the ring; in the flipped position, the side of the locking device away from the connecting end is further away from the suture ring than in the flat position, so that the part of the suture area covered by the locking device is exposed.

[0010] An embodiment of the second aspect of this application provides a ventricular assist system, the ventricular assist system including a ventricular assist device and the aforementioned ventricular connection mechanism; the ventricular assist device is disposed on the clamping ring of the ventricular connection mechanism and locked by the locking device of the ventricular connection mechanism.

[0011] Details of one or more embodiments of the present invention are set forth in the following drawings and description. Other features, objects, and advantages of the invention will become apparent from the specification, drawings, and claims. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 is a schematic diagram of the ventricular connection mechanism provided in an embodiment of this application when the locking device is in a flat position.

[0014] Figure 2 is a top view of the ventricular connection mechanism shown in Figure 1 when the locking device is in a flat position.

[0015] Figure 3 is a schematic diagram of the ventricular connection mechanism shown in Figure 1 when the locking device is in the flipped state.

[0016] Figure 4 is a schematic diagram of the suture ring and clamping ring of the ventricular connection mechanism provided in Figure 1.

[0017] Figure 5 is a top view of the clamping ring of the ventricular connection mechanism shown in Figure 1.

[0018] Figure 6 is a partial view of the clamping ring of the ventricular connection mechanism shown in Figure 5.

[0019] Figure 7 is a schematic diagram of the ventricular connection mechanism shown in Figure 1 when the locking device is in the flipped state.

[0020] Figure 8 is a magnified view of a portion of Figure 1 at point P1.

[0021] Figure 9 is a magnified view of part P2 in Figure 3.

[0022] Figure 10 is a simplified side view of the ventricular connection mechanism shown in Figure 1 when the locking device is in a flat position.

[0023] Figure 11 is a schematic diagram of the locking device of the ventricular connection mechanism shown in Figure 1.

[0024] Figure 12 is an exploded view of the locking device of the ventricular connection mechanism shown in Figure 1.

[0025] Figure 13 is a schematic diagram of the ventricular connection mechanism shown in Figure 1 under clamping forceps.

[0026] Figure 14 is a schematic diagram of the ventricular connection mechanism shown in Figure 1 in conjunction with the clamp and ventricular assist device.

[0027] Figure 15 is a partial cross-sectional view of a ventricular connection mechanism provided in another embodiment, when clamped by a clamp.

[0028] Figure 16 is a magnified view of a portion of Figure 4 at point P3. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0030] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

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

[0032] To illustrate the technical solution of this application, the following description is provided in conjunction with specific accompanying drawings and embodiments.

[0033] Referring to Figures 1 to 3, one embodiment of this application provides a ventricular connection mechanism 10 for mounting 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.

[0034] The suture ring 100, serving as an installation component of the ventricular connection mechanism 10, can be sutured to the outer wall of the heart using sutures, thereby securing the implantable ventricular assist device to the heart. As shown in Figure 2, the suture ring 100 has a first through-hole 100a through which the inlet tube 20a of the ventricular assist device 20 passes. The suture ring 100 also has a suture region 100b surrounding the first through-hole 100a. The suture region 100b has multiple suture marks 100c arranged circumferentially around the suture ring 100. These suture marks 100c facilitate suturing and allow control of suture density. The suture ring 100 is annular, with its inner circumferential surface surrounding the first through-hole 100a. In some embodiments, the suture ring 100 includes an annular cushion and a fabric layer covering the annular cushion; for example, the annular cushion is an implantable silicone component; the fabric layer is polyester fabric. For example, the annular area enclosed by the two concentric dotted circles in Figure 2 is the suture area 100b of the suture ring 100.

[0035] The suture ring 100 has a mounting surface 110 for mounting the clamping ring 200. A suture mark 100c is provided on the mounting surface 110. When the suture ring 100 is sutured to the heart, the mounting surface 110 is the surface of the suture ring 100 facing away from the outer wall of the heart.

[0036] A clamping ring 200 is disposed on the suture ring 100. Specifically, the clamping ring 200 is in contact with the mounting surface 110 and is used to clamp the ventricular assist device 20 (e.g., the inlet tube 20a of the ventricular assist device 20). As shown in Figures 1 and 2, the clamping ring 200 includes a connected ring body 210 and a connecting end 250. The ring body 210 is disposed on the suture ring 100 and has a central axis I. The suture area 100b is located on the outer periphery of the ring body 210.

[0037] In this embodiment, the connecting end 250 extends radially toward the suture region 100b along the ring body 210. In other embodiments, the connecting end 250 may also extend axially away from the suture ring 100 along the ring body 210. The connecting end 250 includes a first connecting arm 230 and a second connecting arm 220. The first connecting arm 230 and the second connecting arm 220 are circumferentially spaced along the ring body 210, and both the first connecting arm 230 and the second connecting arm 220 can be connected to the locking device 300.

[0038] The ring body 210 is an open ring, with the first connecting arm 230 and the second connecting arm 220 fixedly connected to opposite circumferential ends of the open ring. In other words, the ring body 210 has an opening and two ends located at the opening. The first connecting arm 230 is connected to one end of the ring body 210 at the opening, and the second connecting arm 220 is connected to the other end of the ring body 210 at the opening. The distance between the first connecting arm 230 and the second connecting arm 220 can vary, resulting in a change in the inner diameter of the ring body 210. Specifically, when the distance between the first connecting arm 230 and the second connecting arm 220 increases, the inner diameter of the ring body 210 increases; when the distance between the first connecting arm 230 and the second connecting arm 220 decreases, the inner diameter of the ring body 210 decreases.

[0039] In this embodiment, the axial direction of the ring 210 is the extension direction of the central axis I of the ring 210, and the radial direction of the ring 210 refers to the radius or diameter direction of the ring 210, or the direction perpendicular to the extension direction of the central axis I. The circumferential direction of the ring 210 refers to the circumferential direction around the central axis I of the ring 210.

[0040] The ring body 210 is provided with an adjustable diameter second through hole 210a (see Figure 1). The second through hole 210a is used for the insertion of the inlet tube 20a so that the ring body 210 can clamp the inlet tube 20a. The second through hole 210a corresponds to the first through hole 100a, allowing the inlet tube 20a to pass through the suture ring 100 and extend into the heart, so that blood in the heart can flow into the ventricular assist device 20 through the inlet tube 20a and flow out from the outlet tube 20b of the ventricular assist device 20.

[0041] Referring to Figures 1 and 4, the ring 210 includes a head end 211 and a tail end 212 spaced apart, forming an opening in the ring 210. The head end 211 of the ring 210 has a second connecting arm 220 protruding towards the stitching area 100b, and the tail end 212 has a first connecting arm 230 protruding towards the stitching area 100b. The diameter of the second through hole 210a of the ring 210 can be adjusted by adjusting the distance between the head end 211 and the tail end 212, so that the ring 210 is in a clamped or unclamped state.

[0042] Referring to Figures 4 to 6, to facilitate adjustment of the distance between the head end 211 and the tail end 212 of the ring 210, the ring 210 has an arc-shaped groove 210b. The arc-shaped groove 210b extends circumferentially from one end of the ring 210 (e.g., the tail end 212) to the middle of the ring 210. It should be noted that the middle of the ring 210 refers to the portion between the head end 211 and the tail end 212. The arc-shaped groove 210b facilitates the deformation of the ring 210, making the distance between the head end 211 and the tail end 212 easier to adjust.

[0043] The annular body 210 has an outer ring portion 213 and an inner ring portion 214 connected to the outer ring portion 213. The portion of the annular body 210 outside the dashed circle O (see Figure 4) is defined as the outer ring portion 213, and the portion inside the dashed circle O is defined as the inner ring portion 214. Both the outer ring portion 213 and the inner ring portion 214 of the annular body 210 can be considered as annular structures with openings, and the opening position of the inner ring portion 214 corresponds to the opening position of the outer ring portion 213. The inner ring portion 214 is used to clamp the inlet tube 20a of the ventricular assist device 20. It can be understood that the opening of the inner ring portion 214 is formed by the head and tail of the inner ring portion 214 spaced apart, and the opening of the outer ring portion 213 is formed by the head and tail of the outer ring portion 213 spaced apart.

[0044] Using the dashed line II in Figure 6 as the boundary, the arc-shaped groove 210b divides the outer ring portion 213 of the ring body 210 into a first semi-ring 2131 and a second semi-ring 2132. The first semi-ring 2131 has a first radial width L1, and the second semi-ring 2132 has a second radial width L2, which is greater than the first radial width L1. Specifically, the second semi-ring 2132 is connected to the inner ring portion 214, and the arc-shaped groove 210b is located between the inner ring portion 214 and the first semi-ring 2131.

[0045] It should be noted that the central angles of the first half-ring 2131 and the second half-ring 2132 are not necessarily both 180°, and can be set accordingly based on the required clamping force on the ring body 210. If a larger clamping force is required, the central angle of the first half-ring 2131 is larger than the central angle of the second half-ring 2132. If a smaller clamping force is required, the central angle of the first half-ring 2131 can be smaller than the central angle of the second half-ring 2132. That is, the inner ring portion 214 of the ring body 210 can be made more easily deformable by extending the arc groove 210b.

[0046] To avoid affecting the deformation of the inner ring portion 214, the outer ring portion 213 of the ring body 210 is connected to the suture ring 100, wherein the outer ring portion 213 is sewn onto the suture ring 100 with suture thread. Specifically, as shown in Figure 5, the first half-ring 2131 and the second half-ring 2132 of the outer ring portion 213 are provided with a plurality of first suture holes M along the circumference of the ring body 210, and the inner ring portion 214 is provided with a plurality of second suture holes N along the circumference of the ring body 210. Both the first suture holes M and the second suture holes N are used for threading the suture thread. Of course, in some other embodiments, the outer ring portion 213 of the ring body 210 may also be connected to the suture ring 100 by adhesive bonding.

[0047] Referring to Figures 1 to 3 and Figure 7, the locking device 300 is connected to the connecting end 250, and the locking device 300 can adjust the inner diameter of the clamping ring 200. Specifically, the locking device 300 is connected to the side of the connecting end 250 opposite to the ring body 210. The locking device 300 can adjust the size of the second through hole 210a and keep the diameter of the second through hole 210a constant. The clamping ring 200 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 200.

[0048] In this embodiment, the locking device 300 is rotatable relative to the connecting end 250, allowing it to switch between a flat position and a flipped position. In the flat position, the locking device 300 is located on the outer periphery of the ring 210 and protrudes radially from the ring 210. In the flipped position, the side of the locking device 300 furthest from the connecting end 250 is further away from the suture ring 100 than in the flat position, exposing the portion of the suture area 100b that was previously covered by the locking device 300. That is, in the flipped position, the side of the locking device 300 furthest from the connecting end 250 can move away from the suture area 100b, thereby avoiding the suture area 100b (see Figures 3 and 7), facilitating the suture ring 100's suturing to the outer wall of the heart.

[0049] In this embodiment, in the flipped state, the locking device 300 is positioned approximately vertically along the axial direction of the ring 210 on the side opposite to the suture ring 100, allowing the locking device 300 to avoid the suture area 100b as much as possible. In other embodiments, the locking device 300 may also be flipped relative to the suture ring 100 by a small angle, such as 30° or 45°, so that the side of the locking device 300 away from the connecting end 250 is further away from the suture ring 100 than in the flat state, thus achieving the purpose of avoiding the suture area 100b.

[0050] When the suture ring 100 of the ventricular connection mechanism 10 is sutured to the outer wall of the heart, the locking device 300 can first be rotated relative to the clamping ring 200 so that the locking device 300 can avoid the suture area 100b of the suture ring 100. That is, the locking device 300 is lifted off the suture ring 100 to avoid the locking device 300 obstructing the suture of the suture ring 100. Then the suture ring 100 is sutured to the outer wall of the heart. In this way, it is beneficial to uniformly suture the ventricular connection mechanism 10 to the outside of the heart, which can reduce the probability of blood leakage caused by uneven suture.

[0051] As can be seen, in the aforementioned ventricular connection mechanism 10, the locking device 300 is rotatably connected to the connecting end 250 of the clamping ring 200, allowing the locking device 300 to switch between a flat position and a flipped position. In the flipped position, the side of the locking device 300 furthest from the connecting end 250 is further away from the suture ring 100 than in the flat position, exposing the portion of the suture area 100b that was previously covered by the locking device 300. This avoids obstructing the suture area 100b of the suture ring 100, preventing interference with the suturing of the suture ring 100, facilitating uniform suturing of the suture ring 100, and reducing the probability of bleeding due to uneven suturing.

[0052] Referring to Figures 5, 11, and 12, the locking device 300 includes a first swing arm 320 and a second swing arm 310. 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.

[0053] The first swing arm 320 includes a first swing end 321 and a second swing end 322, which are 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 the end of the first swing arm 320 that is away from the first connecting arm 230.

[0054] The locking device 300 further includes a connecting rod 342 and a locking element 330. The connecting rod 342 is connected to the second swing arm 310. The first swing arm 320 is provided with a guide groove 3221. The connecting rod 342 movably passes through the guide groove 3221. In this embodiment, the guide groove 3221 is disposed at the second swing end 322. In other embodiments, the guide groove 3221 may also be disposed between the first swing end 321 and the second swing end 322.

[0055] One end of the second swing arm 310 is rotatably connected to the second connecting arm 220, and a locking block 341 is provided at the 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. Exemplarily, the connecting rod 342 extends from one end of the locking block 341 toward the first swing arm 320. The connecting rod 342 has a mounting end 3421 away from the locking block 341. 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 slide through the guide groove 3221, so that the movement of the first swing arm 320 is not stopped by the connecting rod 342. Specifically, the mounting end 3421 is rotatably connected to the locking member 330.

[0056] Referring again to Figures 5, 11, and 12, the locking member 330 has a rotating end 332 and a locking end 331. The rotating end 332 is rotatably connected to the connecting rod 342 and can rotatably abut against the first rocker arm 320. The locking end 331 can engage with the second rocker arm 310. Specifically, the rotating end 332 is rotatably connected to the mounting end 3421 of the connecting rod 342. When the locking member 330 rotates relative to the first rocker arm 320, it can adjust the distance between the first rocker arm 320 and the second rocker arm 310, thereby adjusting the distance between the first connecting arm 230 and the second connecting arm 220, and thus adjusting the inner diameter of the ring 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 first swing arm 320 and the second swing arm 310 and keep the distance between the first swing arm 320 and the second swing arm 310 unchanged, so as to keep the clamping ring 200 in the clamping state, thereby clamping and fixing the inlet tube 20a of the ventricular assist device 20.

[0057] The rotating end 332 of the locking member 330 is configured as a cam. The rotating end 332 can rotatably abut against the side of the first rocker arm 320 away from the second rocker arm 310, so that when the rotating end 332 rotates, it can push the first rocker arm 320 to move closer to the second rocker arm 310, thereby reducing the inner diameter of the ring body 210.

[0058] 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, causing the second swing end 322 to drive the second connecting arm 220 toward the first connecting arm 230, thereby reducing the distance between the first connecting arm 230 and the second connecting arm 220. This adjusts the diameter of the second through hole 210a, enabling the switching between the clamping state and the non-clamping state of the clamping ring 200. In other words, in this embodiment, only rotating the locking member 330 is needed to reduce the distance between the first connecting arm 230 and the second connecting arm 220; there is no need to move the locking member 330 separately, making the locking operation of the locking device 300 simpler and less strenuous.

[0059] In this embodiment, referring to Figures 4 and 11, the second connecting arm 220 has a first receiving cavity 220a, and the second swing arm 310 is provided with a mounting protrusion 314. Specifically, the end of the second connecting arm 220 near the second swing arm 310 has the first receiving cavity 220a, and the second swing arm 310 is provided with the mounting protrusion 314. The mounting protrusion 314 extends into the first receiving cavity 220a and is rotatably connected to the second connecting arm 220 via a first pin 261. Specifically, the mounting protrusion 314 is disposed at the end of the second swing arm 310 facing the second connecting arm 220. Of course, in other embodiments, the end of the second swing arm 310 near the second connecting arm 220 has the first receiving cavity 220a, and the second connecting arm 220 extends into the first receiving cavity 220a and is rotatably connected to the second swing arm 310 via a first pin 261.

[0060] 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.

[0061] The first connecting arm 230 has a second receiving cavity 230a, and the first swing arm 320 is provided with a protrusion 3211, which extends into the second receiving cavity 230a and is rotatably connected to the first connecting arm 230 via a second pin 262. Specifically, the end of the first connecting arm 230 near the first swing arm 320 has a second receiving cavity 230a, and the protrusion 3211 is disposed at the first swing end 321. Of course, in other embodiments, the end of the first swing arm 320 near the first connecting arm 230 has a second receiving cavity 230a, and the first connecting arm 230 extends into the second receiving cavity 230a and is rotatably connected to the first swing arm 320 via a second pin 262.

[0062] 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.

[0063] As shown in Figures 2, 8, and 9, in some embodiments of this application, the ventricular connection mechanism 10 further includes a limiting structure 400. The limiting structure 400 is disposed on at least one of the connecting end 250 and the locking device 300, and the limiting structure 400 can limit the rotation angle of the locking device 300 relative to the connecting end 250. That is, the limiting structure 400 is disposed on at least one of the second connecting arm 220 and the second swing arm 310; or, disposed on at least one of the first connecting arm 230 and the first swing arm 320; or, disposed on at least one of the second connecting arm 220 and the second swing arm 310, and also disposed on at least one of the first connecting arm 230 and the first swing arm 320.

[0064] By setting the limiting structure 400, the locking device 300 can be restricted from rotating relative to the connecting end 250 during the suturing process of the suture ring 100, which is conducive to the smooth suturing of the suture ring 100 or the smooth installation of the ventricular assist device 20.

[0065] In some embodiments of this application, the limiting structure 400 includes a mating portion 410 disposed on the locking device 300 and a positioning portion 420 disposed on the connecting end 250. When the locking device 300 is rotated to a flat position or a flipped position, the positioning portion 420 can engage with the mating portion 410 to lock the locking device 300 in the flat or flipped position. For example, when the locking device 300 is rotated to the flipped position, the positioning portion 420 and the mating portion 410 engage to restrict the rotation of the locking device 300 relative to the connecting end 250, keeping the locking device 300 in the flipped position, which facilitates the smooth suturing of the suture ring 100. When the locking device 300 is rotated to a flat position, the positioning portion 420 and the mating portion 410 engage to restrict the rotation of the locking device 300 relative to the connecting end 250, keeping the locking device 300 in the flat position, which facilitates the smooth installation of the ventricular assist device 20.

[0066] One of the mating part 410 and the positioning part 420 is a protruding structure, and the other is a recessed structure. In this embodiment, the positioning part 420 is a protruding structure, and the mating part 410 is a recessed structure. When the locking device 300 rotates relative to the stitching ring 100 to a flipped state, the positioning part 420 engages with the mating part 410, thereby keeping the locking device 300 in the flipped state. In other embodiments, the positioning part 420 can be a recessed structure, and correspondingly, the mating part 410 can be a protruding structure.

[0067] In this embodiment, the mating part 410 is disposed on the second swing arm 310, and the positioning part 420 is disposed on the second connecting arm 220. In one embodiment, the mating part 410 is disposed on the first swing arm 320, and the positioning part 420 is disposed on the first connecting arm 230. In another embodiment, the mating part 410 is disposed on the first swing arm 320 and the second swing arm 310, and the positioning part 420 is disposed on the first connecting arm 230 and the second connecting arm 220.

[0068] As shown in Figures 2, 8, and 9, the connecting end 250 has a first top surface 221 facing away from the stitching ring 100. Specifically, the second connecting arm 220 has a first top surface 221 facing away from the mounting surface 110. The connecting end 250 also has a first side surface 223 facing away from the central axis I of the ring body 210 along the radial direction of the ring body 210. The second connecting arm 220 also has a first bottom surface 222 facing the mounting surface 110, and the first side surface 223 is connected to the first top surface 221 and the first bottom surface 222.

[0069] The second swing arm 310 has a second bottom surface 312 that is opposite to the mounting surface 110 and a second top surface 311 that is 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. When the locking device 300 rotates relative to the stitching ring 100 to a flat position, the second bottom surface 312 is opposite to the mounting surface 110. In this embodiment, the mating part 410 is provided on the second side surface 313.

[0070] In this embodiment, the positioning part 420 includes a first positioning part 421 disposed on the first top surface 221. In the flipped state, the engaging part 410 can engage with the first positioning part 421 to lock the locking device 300 in the flipped state. Specifically, when the locking device 300 rotates to the flipped state relative to the stitching ring 100, the second side surface 313 of the second swing arm 310 can face the first top surface 221 of the second connecting arm 220, which allows the engaging part 410 on the second side surface 313 to engage with the first positioning part 421 on the first top surface 221 to lock the locking device 300 in the flipped state.

[0071] Furthermore, to prevent the locking device 300 from continuing to rotate after being rotated to the flat position, thus affecting the installation of the ventricular assist device 20, the positioning part 420 also includes a second positioning part 422 disposed on the first side 223. In the flat position, the mating part 410 can engage with the second positioning part 422 to lock the locking device 300 in the flat position. Specifically, when the locking device 300 is rotated to the flat position, the second side 313 of the second swing arm 310 can face the first side 223 of the second connecting arm 220, which allows the mating part 410 on the second side 313 to engage with the second positioning part 422 on the first side 223, thereby locking the locking device 300 and locking it in the flat position. This avoids interference with the installation of the ventricular assist device 20 and also prevents unnecessary rotation of the locking device 300 after the ventricular assist device 20 is implanted in the body.

[0072] In this embodiment, the first connecting arm 230 and the second connecting arm 220 have roughly the same structure, also having a first top surface 221, a first bottom surface 222, and a first side surface 223. The first positioning part 421 can be disposed on the first top surface 221 of the first connecting arm 230, and the second positioning part 422 can be disposed on the first side surface 223 of the first connecting arm 230. The first swing arm 320 also has roughly the same structure as the second swing arm 310, also having a second top surface 311, a second bottom surface 312, and a second side surface 313. The mating part 410 can be disposed on the second side surface 313 of the first swing arm 320.

[0073] In this embodiment, the mating part 410 is disposed on the second swing arm 310, and the first positioning part 421 and the second positioning part 422 are both disposed on the second connecting arm 220. In one embodiment, the mating part 410 is disposed on the first swing arm 320, and the first positioning part 421 and the second positioning part 422 are both disposed on the first connecting arm 230. In another embodiment, the mating part 410 includes two parts, one disposed on the first swing arm 320 and the other disposed on the second swing arm 310, the first positioning part 421 is disposed on the first connecting arm 230, and the second positioning part 422 is disposed on the second connecting arm 220.

[0074] In one embodiment of this application, as shown in Figures 1, 2 and 10, when the inlet tube 20a of the ventricular assist device 20 is installed on the ventricular connection mechanism 10, the locking device 300 can be rotated relative to the suture ring 100 to a flat position, so that the locking device 300 is at least partially located in the suture area 100b. This allows the locking device 300 to be moved 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, which would affect the installation of the ventricular assist device 20 on the clamping ring 200.

[0075] In some embodiments, as shown in Figures 7 and 14, the ring 210 has a third top surface 217 facing away from the suture ring 100. When the locking device 300 is in the flipped state, there is a first included angle α between the locking device 300 and the third top surface 217, where 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 towards the inlet tube 20a of the ventricular assist device 20 under its own gravity. This makes the locking device 300 further away from the suture ring 100, thus reducing the probability that the locking device 300 will rotate to a flat position under its own gravity when suturing the suture ring 100.

[0076] To ensure that the locking device 300 is positioned as close as possible to the suture ring 100 when lying flat, as shown in Figure 4, in some embodiments, the first swing arm 320 has a first rotation axis X that rotates about the first connecting arm 230. The first rotation axis X is parallel to the surface of the suture ring 100 facing the clamping ring 200, that is, the first rotation axis X is parallel to the mounting surface 110. With this configuration, when the locking device 300 rotates relative to the suture ring 100 to a flat position, the locking device 300 can be positioned as close as possible to the suture ring 100, thus keeping the locking device 300 away from the ventricular assist device 20 and avoiding any impact on the installation of the ventricular assist device 20.

[0077] As shown in Figures 1 and 2, the rotating end 332 of the locking member 330 has a second rotation axis Y that rotates around the first swing arm 320. In the flat state, the second rotation axis Y is perpendicular to the mounting surface 110, allowing the locking member 330 to rotate circumferentially along the ring body 210. This prevents the locking member 330 from abutting against the ventricular assist device 20 mounted on the clamping ring 200 during the locking process, thus ensuring smooth locking of the locking member 330. In the flipped state, the second rotation axis Y intersects with or is parallel to the mounting surface 110.

[0078] As shown in Figure 10, when the locking device 300 is in a flat position, there is a second included angle β between the second connecting arm 220 and the second swing arm 310, and there is also a second included angle β between the first connecting arm 230 and the first swing arm 320. The second included angle β is approximately equal to 180°.

[0079] Referring to Figures 4 and 5, the ring 210 has an outer peripheral wall 216. In some embodiments, the clamping ring 200 further includes a lug 240, and both the lug 240 and the connecting end 250 are disposed on the outer peripheral wall 216, wherein the lug 240 can be clamped by the clamp 30.

[0080] As shown in Figures 13 to 15, clamping the clamp 30 onto the lug 240 of the clamping ring 200 allows the operator to clamp and support the clamping ring 200 by operating the clamp 30, which facilitates the installation of the ventricular assist device 20 onto the clamping ring 200.

[0081] The clamp 30 includes a first clamping arm 30a and a second clamping arm 30b. The end of the first clamping arm 30a furthest from the clamping ring 200 has a first handle portion E, and the end of the second clamping arm 30b furthest from the clamping ring 200 has a second handle portion F. The middle portions of the first clamping arm 30a and the second clamping arm 30b are hinged together. The end of the first clamping arm 30a near the clamping ring 200 has a first notch P (see Figure 15), and the end of the second clamping arm 30b near the clamping ring 200 has a second notch Q (see Figure 15). When the ends of the first clamping arm 30a and the second clamping arm 30b approach each other, the first notch P and the second notch Q mate to form a receiving groove. The clamp 30 not only facilitates the operator's grip but also provides a more secure clamping grip on the lug 240 on the clamping ring 200.

[0082] Based on the clamp 30 described above, as shown in FIG16, in some embodiments, the lug 240 includes a connecting portion 241 and a positioning lug 242. The connecting portion 241 protrudes from the outer peripheral wall 216 of the ring body 210, and the positioning lug 242 is disposed on the 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.

[0083] The circumferential width W2 of the positioning ear 242 is greater than the circumferential width W1 of the connecting portion 241, so that an accommodating gap 240a is formed between the positioning ear 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 242 of the lug 240 is also clamped in the accommodating groove of the clamp 30. That is, both the connecting portion 241 and the positioning ear 242 of the lug 240 are clamped by the clamp 30, which can increase the clamping force of the clamp 30 on the lug 240.

[0084] Referring again to Figure 16, the junction of the connecting part 241 and the positioning ear 242 has a locking groove 240b. When the clamp 30 clamps the lug 240, the corner of the first clamping arm 30a near the ring body 210 and the corner of the second clamping arm 30b near the ring body 210 engage in the locking groove 240b of the lug 240, which can further increase the clamping force of the clamp 30 on the lug 240.

[0085] The lug 240 has a smooth, rounded structure, and the connection between the lug 240 and the outer surface of the clamping ring 200 is also rounded. This design not only eliminates deformation or breakage caused by internal stress and increases the connection strength between the lug 240 and the clamping ring 200, reducing the probability of the lug 240 breaking off from the clamping ring 200 when the clamp 30 applies force, but also prevents scratching of biological tissue when the ventricular assist device 20 together with the ventricular connection mechanism 10 is implanted in the body.

[0086] As shown in Figure 15, when the lug 240 is clamped by the clamp 30, the end face of the first clamping arm 30a near the clamping ring 200 and the end face of the second clamping arm 30b near the clamping ring 200 can abut against the outer peripheral wall 216 of the clamping ring 200 to improve the clamping firmness of the clamp 30.

[0087] As shown in Figures 4 and 15, the outer peripheral wall 216 includes a tangent plane 2161 and an arc surface 2162 connected to the tangent plane 2161. A lug 240 protrudes radially from the ring body 210 onto the tangent plane 2161, that is, the lug 240 protrudes from the tangent plane 2161 in a direction away from the central axis I of the ring body 210. Thus, when the clamp 30 clamps the lug 240, the tangent plane 2161 of the clamping ring 200 can abut against the end face of the clamp 30 near the clamping ring 200, resulting in a two-plane contact between the clamp 30 and the clamping ring 200. Compared to the lug 240 being positioned on the arc surface 2162, which results in a point contact between the clamp 30 and the clamping ring 200 (plane and arc surface), this planar contact makes it difficult for the clamp 30 to rotate relative to the clamping ring 200, thus increasing the clamping strength between the clamp 30 and the lug 240.

[0088] In some embodiments, multiple lugs 240 may be provided, and multiple lugs 240 may be provided on the first half-ring 2131 and the second half-ring 2132 of the clamping ring 200. By providing multiple lugs 240, the clamping clamp 30 can clamp the clamping ring 200 at different positions, so that the ventricular assist device 20 can be installed on the clamping ring 200 from different angles, thereby improving the flexibility of the installation of the ventricular assist device 20.

[0089] The number of lugs 240 can be set according to requirements, as long as it does not affect the installation of the ventricular assist device 20 on the clamping ring 200. As shown in Figures 4 and 5, there can be two lugs 240. For example, the lugs 240 include a first lug 2401 and a second lug 2402, which are spaced apart circumferentially along the ring body 210. The first lug 2401 is located on the outer circumferential surface of the first half-ring 2131, and the second lug 2402 is located on the outer circumferential surface of the second half-ring 2132. The outer circumferential surfaces of the first half-ring 2131 and the second half-ring 2132 are both part of the outer circumferential wall 216 of the ring body 210.

[0090] As shown in Figure 5, the first lug 2401 has a first distance H1 between it and the central axis I of the ring body 210, and the second lug 2402 has a second distance H2 between it and the central axis I of the ring body 210, where H2 < H1. This arrangement allows the second lug 2402 to be closer to the central axis I of the ring body 210 than the first lug 2401. Furthermore, the second radial width L2 of the second half-ring 2132 is greater than the first radial width L1 of the first half-ring 2131. While ensuring sufficient strength for the second half-ring 2132, the radial width of the second half-ring 2132 at the corresponding position of the second lug 2402 can be reduced, allowing the second lug 2402 to be closer to the central axis I of the ring body 210, thus avoiding the suture area 100b of the suture ring 100 and further facilitating the suturing of the suture ring 100 to the outer wall of the heart.

[0091] It should be noted that, because the first half-ring 2131 has an arc-shaped groove 210b, the radial width of the first half-ring 2131 is smaller than the radial width of the second half-ring 2132. That is, the first radial width L1 of the first half-ring 2131 is smaller than the second radial width L2 of the second half-ring 2132. Therefore, in order for the first half-ring 2131 to have sufficient strength, the first half-ring 2131 needs to have a sufficient radial width. Thus, at least a portion of the first lug 2401 is located in the suturing area 100b of the suture ring 100, that is, the first lug 2401 does not avoid the suturing area 100b of the suture ring 100.

[0092] Understandably, in order to avoid 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, 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.

[0093] Specifically, as shown in Figure 5, the first half-ring 2131 and the second half-ring 2132 are provided with a plurality of first suture holes M along the circumference of the ring body 210, and the inner ring portion 214, corresponding to the position of the second half-ring 2132 (i.e., the portion with the second lug 2402), is provided with a plurality of second suture holes N along the circumference of the ring body 210. The distance between two adjacent first suture holes M is equal, defined as a third distance H3, and the distance between two adjacent second suture holes N is also equal, defined as a fourth distance H4, where H4 > H3. By increasing the distance between two adjacent second suture holes N, the arrangement of suture holes on the second half-ring 2132 becomes sparser, thereby minimizing the impact of the second suture holes N on the strength of the second half-ring 2132.

[0094] It should be noted that in this embodiment, both the first suture hole M and the second suture hole N are 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.

[0095] Another embodiment of this application provides a ventricular assist system, including a ventricular assist device 20 and a ventricular connection mechanism 10 as described in any of the above embodiments; the ventricular assist device 20 is disposed on the clamping ring 200 of the ventricular connection mechanism 10 and locked by the locking device 300 of the ventricular connection mechanism 10.

[0096] In this ventricular assist system, the locking device 300 of the ventricular connection mechanism 10 can switch between a flat state and a flipped state relative to the clamping ring 200. This allows the locking device 300 to avoid both the installation of the ventricular assist device 20 and the suturing of the suture ring 100, facilitating uniform suturing of the suture ring 100 and reducing the chance of bleeding due to uneven suturing.

[0097] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A ventricular connection mechanism, characterized by, include: A suture ring having a suture area; A clamping ring, comprising a connected ring body and a connecting end, the ring body being disposed on the suture ring, the suture area being located on the outer periphery of the ring body; and A locking device is connected to the connecting end, and the locking device is capable of adjusting the inner diameter of the ring body; The locking device is rotatable relative to the connecting end, so that the locking device can switch between a flat state and a flipped state; In the flat position, the locking device is located on the outer periphery of the ring and protrudes radially along the ring; in the flipped position, the side of the locking device away from the connecting end is further away from the suture ring than in the flat position, so that the part of the suture area covered by the locking device is exposed.

2. The ventricular connection mechanism of claim 1, wherein, The connecting end includes a first connecting arm and a second connecting arm spaced circumferentially along the ring body. The locking device includes a first swing arm and a second swing arm. The first swing arm is rotatably connected to the first connecting arm, and the second swing arm is rotatably connected to the second connecting wall.

3. The ventricular connection mechanism of claim 2, wherein, The suture ring has a mounting surface for mounting the clamping ring, and the first swing arm has a first rotation axis that rotates about the first connecting arm, the first rotation axis being parallel to the mounting surface.

4. The ventricular connection mechanism of claim 2, wherein, The locking device further includes a connecting rod and a locking member. 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 can rotatably abut against the first swing arm. The locking end can engage with the second swing arm. When the locking member rotates relative to the first swing arm, it can adjust the distance between the first swing arm and the second swing arm to adjust the distance between the first connecting arm and the second connecting arm, thereby adjusting the inner diameter of the ring. The locking end engages with the second swing arm to prevent the distance between the first connecting arm and the second connecting arm from increasing.

5. The ventricular connection mechanism of claim 4, wherein, The ring body is an open ring, and the first connecting arm and the second connecting arm are respectively fixed to the two circumferentially opposite ends of the open ring; 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 slide through the guide groove; the rotating end of the locking member is cam-shaped, and the rotating end can rotatably abut against the side of the first swing arm opposite to the second swing arm.

6. The ventricular connection mechanism of claim 4, wherein, The stitching ring has a mounting surface for mounting the clamping ring, and the rotating end of the locking member has a second rotation axis that rotates about the first swing arm. In the flat position, the second rotation axis is perpendicular to the mounting surface. In the flipped state, the second rotation axis intersects with or is parallel to the mounting surface.

7. The ventricular connection mechanism of claim 2, wherein, The second connecting arm has a first receiving cavity, and the second swing arm has a mounting protrusion extending into the first receiving cavity and rotatably connected to the second connecting arm via a first pin; the first connecting arm has a second receiving cavity, and the first swing arm has a protrusion extending into the second receiving cavity and rotatably connected to the first connecting arm via a second pin.

8. The ventricular connection mechanism of claim 1, wherein, The ventricular connection mechanism also has at least one of the following features: The ventricular connection mechanism further includes a limiting structure, which is disposed at least one of the connecting end and the locking device, and the limiting structure can limit the rotation angle of the locking device relative to the connecting end. The suture ring also has a first through hole through which the inlet tube of the ventricular assist device passes, and the suture area surrounds the first through hole.

9. The ventricular connection mechanism of claim 1, wherein, The ventricular connection mechanism further includes a limiting structure, which includes a positioning part disposed at the connection end and a cooperating part disposed at the locking device. The positioning part can engage with the cooperating part to lock the locking device in the flat position or the flipped position.

10. The ventricular connection mechanism of claim 9, wherein, The ventricular connection mechanism also has at least one of the following features: The connecting end has a first top surface facing away from the suture ring, and the positioning part includes a first positioning part disposed on the first top surface. In the flipped state, the mating part can engage with the first positioning part to lock the locking device in the flipped state. The connecting end also has a first side facing away from the central axis of the ring body along the radial direction of the ring body. The positioning part includes a second positioning part disposed on the first side. In the flat state, the mating part can engage with the second positioning part to lock the locking device in the flat state. One of the mating part and the positioning part is a protruding structure, and the other is a groove structure.

11. The ventricular connection mechanism of claim 9, wherein, The connecting end 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, and the locking member has a rotating end and a locking end. The rotating end is rotatably connected to the connecting rod and can rotatably abut against the first swing arm. The locking end can engage with the second swing arm. The mating part is provided on the first swing arm, and the positioning part is provided on the first connecting arm; or, the mating part is provided on the second swing arm, and the positioning part is provided on the second connecting arm.

12. The ventricular connection mechanism of claim 1, wherein, The ring body has a third top surface facing away from the suture ring. When the locking device is in the flipped state, there is a first included angle α between the locking device and the third top surface, where α ≤ 90°.

13. The ventricular connection mechanism of any of claims 1 to 12, wherein, The ring body has an outer peripheral wall, and the clamping ring also includes a lug. The lug and the connecting end are both disposed on the outer peripheral wall, and the lug can be clamped by the clamp.

14. The ventricular connection mechanism of claim 13, wherein, The outer peripheral wall includes a tangent plane and an arc surface connected to the tangent plane, and the lug protrudes radially from the tangent plane along the ring body.

15. The ventricular connection mechanism of claim 13, wherein, The ring has an outer ring portion and an inner ring portion connected to the outer ring portion. Both the outer ring portion and the inner ring portion are ring structures with openings. The opening position of the inner ring portion corresponds to the opening position of the outer ring portion. The outer ring portion is connected to the suture ring, and the inner ring portion is used to clamp the inlet tube of the ventricular assist device. The ring also has an arc-shaped groove that extends circumferentially from one end of the ring to the middle of the ring. The arc-shaped groove is located between the inner ring portion and the outer ring portion, and divides the outer ring portion of the ring into a first half-ring and a second half-ring. The first half-ring has a first radial direction. The second half-ring has a second radial width, which is greater than the first radial width. The second half-ring is connected to the inner ring portion. The arcuate groove is located between the first half-ring and the inner ring portion. The lug includes a first lug and a second lug, which are spaced apart circumferentially along the ring body. The first lug is located on the outer circumferential surface of the first half-ring, and the second lug is located on the outer circumferential surface of the second half-ring. The first lug has a first distance H1 between it and the central axis of the ring body, and the second lug has a second distance H2 between it and the central axis of the ring body, wherein H2 < H1.

16. A ventricular assist system, characterized by It includes a ventricular assist device and a ventricular connection mechanism as described in any one of claims 1 to 15; the ventricular assist device is disposed on the clamping ring of the ventricular connection mechanism and locked by the locking device of the ventricular connection mechanism.

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