Ventricular connection mechanism and ventricular assist system

Abstract

The application relates to a ventricular connecting mechanism and a ventricular assist system. The ventricular 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 part connected with each other, the ring body is arranged on the suture ring, and the suture area is located at the outer periphery of the ring body; the locking device is connected to the connecting end part, and the locking device 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 flat state and a turned-over state; in the flat state, the locking device is located at the outer periphery of the ring body and protrudes in the radial direction of the ring body; in the turned-over state, the side of the locking device away from the connecting end part is farther away from the suture ring than in the flat state, so that the part of the suture area hidden by the locking device is exposed. The locking device of the ventricular connecting mechanism can avoid the suture area of the suture ring, and uniform suture of the suture ring is facilitated.

Description

Technical Field

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

[0002] 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

[0003] Therefore, it is necessary to provide a ventricular connection mechanism and a ventricular assist system to address the aforementioned technical problems.

[0004] A ventricular connection mechanism, comprising:

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

[0006] 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

[0007] 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;

[0008] 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.

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

[0010] 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, and 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 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.

[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 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.

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

[0013] The first swing arm has a first axis of rotation about the second connecting arm, the first axis of rotation being parallel to the mounting surface; and / or

[0014] The rotating end of the locking member has a second rotation axis that rotates around the first swing arm. In the flat state, 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.

[0015] In one embodiment, 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 state or the flipped state.

[0016] In one embodiment, 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.

[0017] And / or, the connecting end has a first side facing away from the central axis of the ring body in a radial direction, and 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.

[0018] And / or, one of the mating part and the positioning part is provided as a protruding structure, and the other is provided as a groove structure.

[0019] In one embodiment, the connecting end includes a first connecting arm and a second connecting arm, and 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, and the locking end can engage with the second swing arm; wherein:

[0020] The mating part is provided on the first swing arm, and the positioning part is provided on the first connecting arm;

[0021] Alternatively, the mating part is located on the second swing arm, and the positioning part is located on the second connecting arm.

[0022] In one embodiment, the ring body has a third top surface facing away from the suture ring, and 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, wherein α ≤ 90°.

[0023] In one embodiment, the ring body has an outer peripheral wall, and the clamping ring further includes a lug, both the lug and the connecting end are disposed on the outer peripheral wall, and the lug can be clamped by clamps.

[0024] In one embodiment, the outer peripheral wall includes a tangent plane and an arcuate surface connected to the tangent plane, and the lug protrudes radially from the tangent plane along the ring body;

[0025] And / or, the lugs include a first lug and a second lug, the first lug and the second lug being spaced apart circumferentially along the ring body, the first lug having a first distance H1 between it and the central axis of the ring body, and the second lug having a second distance H2 between it and the central axis of the ring body, wherein H2 < H1.

[0026] A ventricular assist system includes a ventricular assist device and a ventricular connection mechanism as described in any of the preceding claims; the ventricular assist device is disposed on a clamping ring of the ventricular connection mechanism and locked by a locking device of the ventricular connection mechanism.

[0027] In the aforementioned ventricular connection mechanism and ventricular assist system, the locking device is rotatably connected to the connecting end of the clamping ring, allowing the locking device to switch between a flat state and a flipped state. In the flipped state, the side of the locking device away from the connecting end is further away from the suture ring than in the flat state, exposing the part of the suture area that was previously covered by the locking device. This avoids interfering with the suturing of the suture ring, facilitates uniform suturing of the suture ring, and reduces the probability of bleeding due to uneven suturing. Attached Figure Description

[0028] Figure 1 This 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.

[0029] Figure 2 for Figure 1 The diagram shows a top view of the ventricular connection mechanism with the locking device in a horizontal position.

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

[0031] Figure 4 for Figure 1 A schematic diagram of the suture ring and clamping ring of the provided ventricular connection mechanism.

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

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

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

[0035] Figure 8 for Figure 1 A magnified view of a portion of P1.

[0036] Figure 9 for Figure 3 A magnified view of a portion of P2.

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

[0038] Figure 11 for Figure 1 A schematic diagram of the locking device of the provided ventricular connection mechanism.

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

[0040] Figure 13 for Figure 1 A schematic diagram of the provided ventricular connection mechanism under clamping forceps.

[0041] Figure 14 for Figure 1 A schematic diagram showing the ventricular connection mechanism in conjunction with clamps and ventricular assist devices.

[0042] Figure 15 A partial cross-sectional view of a ventricular connection mechanism provided in another embodiment, held by clamps.

[0043] Figure 16 for Figure 4 A magnified view of a portion of P3.

[0044] The labels in the attached diagram are explained 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 portion; 2131. First half-ring; M. First suture hole; 2132. Second half-ring; N. Second suture hole; 214. Inner ring portion 216. Outer peripheral wall; 2161. Tangent 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 receiving cavity; 230. First connecting arm; 230a. Second receiving cavity; 240. Lug; 241. Connecting part; 242. Positioning lug; 240a. Receiving gap; 240b. Engaging groove; 250. Connecting end Part; 261, First pin; 262, Second pin; 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 element; 331, Locking end; 332, Rotating end; 341, Engaging block; 342, Connecting rod; 3421. Mounting end; 400, limiting structure; 410, mating 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, central axis. Detailed Implementation

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

[0047] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0048] Furthermore, where the terms "first" and "second" appear, these terms are 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 with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0050] like Figures 1 to 3 As shown, one embodiment of this 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 suture ring 100, serving as the mounting 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 20 to the heart. For example... Figure 2As shown, the suture ring 100 may have a first through-hole 100a and a suture region 100b surrounding the first through-hole 100a, and the suture region 100b has a plurality of suture marks 100c along the circumference of the suture ring 100. The suture marks 100c facilitate control of suture density. The suture ring 100 may be annular, and its inner circumferential surface may surround the first through-hole 100a. In some embodiments, the suture ring 100 may include an annular pad and a fabric layer covering the annular pad; for example, the annular pad is an implantable silicone component; the fabric layer is polyester fabric. Exemplarily, Figure 2 The area enclosed by the two circular dotted lines is the suture area 100b of the suture ring 100.

[0052] The suture ring 100 has a mounting surface 110 for mounting the clamping ring 200, and the suture area 100b and the suture mark 100c are both 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 that faces away from the outer wall of the heart.

[0053] A clamping ring 200 is disposed on the suture ring 100 and is in contact with the mounting surface 110. The clamping ring 200 is used to clamp the implantable ventricular assist device 20 (e.g., the inlet tube 20a of the ventricular assist device 20). Figure 1 and Figure 2 As shown, 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.

[0054] 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 spaced circumferentially along the ring body 210, both of which can be connected to the locking device 300.

[0055] The ring body 210 is an open ring. The first connecting arm 230 and the second connecting arm 220 are respectively fixed to the two circumferentially opposite ends of the open ring, 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 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.

[0057] The annular body 210 encloses a second through hole 210a with an adjustable diameter (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, so that the inlet tube 20a can pass through the suture 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 Figure 4 The ring body 210 can be an annular structure with a head end 211 and a tail end 212 spaced apart, and the head end 211 and tail end 212 of the ring body 210 are respectively provided with a second connecting arm 220 and a first connecting arm 230 protruding towards the stitching area 100b. The diameter 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] To facilitate adjustment of the gap width between the head end 211 and the tail end 212 of the ring body 210, such as Figure 5 and Figure 6 As shown, the ring 210 has an arcuate groove 210b, which extends circumferentially from one end of the ring 210 (e.g., the tail end 212 of the ring 210) to the middle of the ring 210, so as to... Figure 6 The outer ring 213 of the ring body 210 is divided into a first semi-ring 2131 and a second semi-ring 2132 by the dashed line II. 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. It should be noted that the middle part of the ring body 210 refers to the portion located between the head end 211 and the tail end 212. The arc-shaped groove 210b facilitates the deformation of the tail end 212 of the ring body 210, making the spacing between the head end 211 and the tail end 212 easier to adjust.

[0060] See Figure 5 The portion outside the dashed circle of ring 210 represents the outer ring portion 213 of ring 210, while the portion inside the dashed circle represents the inner ring portion 214 of ring 210. Both the outer ring portion 213 and the inner ring portion 214 of ring 210 can be considered as ring structures with openings, 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 at intervals, and the opening of the outer ring portion 213 can be formed by the head and tail of the outer ring portion 213 at intervals.

[0061] 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°. They can be set according to 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 that of the second half-ring 2132. This can be achieved by extending the arc groove 210b to make the inner ring portion 214 of the ring body 210 easier to deform. Conversely, if a smaller clamping force is required, the central angle of the first half-ring 2131 is larger than that of the second half-ring 2132.

[0062] To avoid affecting the deformation of the inner ring portion 214, the outer ring portion 213 of the ring body 210 can be connected to the suture ring 100, wherein the outer ring portion 213 can be sewn onto the suture ring 100 using suture thread. Specifically, as shown... Figure 5 As shown, the inner ring portion 214 has a plurality of first suture holes M along its circumference, and the second half-ring 2132 of the outer ring portion 213 has a plurality of second suture holes N along its circumference. 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 means of adhesive bonding.

[0063] A locking device 300 is connected to the connecting end 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 250 opposite to the ring body 210, and the locking device 300 can adjust the size of the second through hole 210a and keep the size of the second through hole 210a constant. The locking device 300 can clamp and lock the inlet tube 20a of the ventricular assist device 20 into 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 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 [link to previous embodiment]). Figure 3 and Figure 7 This facilitates the suturing of the 100 ring to the outer wall of the heart.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] See Figure 11 and Figure 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, which are rotatably connected to the first connecting arm 230. The second swing end 322 is located at the end of the first swing arm 320 opposite to the first connecting arm 230. The first swing arm 320 is provided with a guide groove 3221, through which the connecting rod 342 movably passes, and has a mounting end 3421 away from the engaging block 341. In this embodiment, the guide groove 3221 is located at the second swing end 322. In other embodiments, the guide groove 3221 may also be located 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 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 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 blocked by the connecting rod 342.

[0071] See also Figure 11 and Figure 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 rotatably abut against the first swing arm 320. The locking end 331 can engage with the second swing arm 310. When the locking member 330 rotates relative to the first swing arm 320, it can adjust the distance between the first swing arm 320 and the second swing 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 second swing arm 310 and the second swing arm 320 and keep the distance between the second swing arm 310 and the first swing arm 320 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.

[0072] 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.

[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, 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.

[0074] In this embodiment, as Figure 4 As shown, the second connecting arm 220 has a first receiving cavity 220a at one end near the second swing arm 310. A mounting protrusion 314 protrudes from the second connecting arm 220 towards the second swing arm 220. 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. Alternatively, in other embodiments, the second swing arm 310 has a first receiving cavity 220a at one end near the second connecting arm 220, 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.

[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 receiving cavity 230a at one end near the first swing arm 320. The first swing end 321 may also be provided with a protrusion that extends into the second receiving cavity 230a and is rotatably connected to the first connecting arm 230 via a second pin 262. Alternatively, in other embodiments, the first swing arm 320 has a second receiving cavity 230a at one end near the first connecting arm 230, 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.

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

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

[0080] 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, preventing the locking device 300 from rotating relative to the connecting end 250, 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, preventing the locking device 300 from rotating relative to the connecting end 250, which facilitates the smooth installation of the ventricular assist device 20.

[0081] 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 can engage 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.

[0082] 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.

[0083] like Figure 8 and Figure 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. The first side surface 223 is radially opposite to the central axis I of the ring body 210 along the ring body 210.

[0084] 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.

[0085] In this embodiment, the positioning part 420 includes a first positioning part 421 disposed on the first top surface 221. 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 mating 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.

[0086] 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. 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. This 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 keeping it in the flat position. This avoids interference with the installation of the ventricular assist device 20 on the clamping ring 200 and also prevents 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 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.

[0088] 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.

[0089] In one embodiment of this application, as Figure 1 , Figure 2 and Figure 10 As shown, 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.

[0090] In some embodiments, such as Figure 7 As shown, 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. Therefore, when suturing the suture ring 100, the probability of the locking device 300 rotating to a flat position under its own gravity can be reduced.

[0091] To ensure that the locking device 300 is placed as close as possible to the seam ring 100 when laid flat, such as Figure 4As shown, in some embodiments, the first swing arm 320 has a first rotation axis X that rotates about the second connecting arm 220. 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 contact the suture ring 100, allowing the locking device 300 to be moved away from the ventricular assist device 20, thus avoiding 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 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 enabling the locking member 330 to lock smoothly. In the flipped state, the second rotation axis Y intersects with or is parallel to the mounting surface 110.

[0093] like Figure 10 As shown, 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 between the first connecting arm 230 and the first swing arm 320, and the second included angle β is approximately equal to 180°.

[0094] like Figure 5 As shown, 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.

[0095] like Figure 13 and Figure 14 As shown, the lug 240 on the clamping ring 200 allows the operator to clamp and support the clamping ring 200 by operating the clamp 30, which is beneficial for the installation of the ventricular assist device 20 on the clamping ring 200.

[0096] 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 The second clamping arm 30b has a second notch Q at one end near the clamping ring 200 (see...). Figure 15When the end of the first clamping arm 30a near the clamping ring 200 and the end of the second clamping arm 30b near the clamping ring 200 rotate toward each other, the first notch P and the second notch Q mate to form a receiving groove. The clamp 30 with this structure is not only easy for the operator to hold, but also can more firmly clamp the lug 240 on the clamping ring 200.

[0097] Based on the aforementioned clamp 30, such as Figure 16 As shown, 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.

[0098] 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. It can be seen that the lug 240 is clamped by the clamp 30 in two places, which can increase the clamping force of the clamp 30 on the lug 240.

[0099] See also Figure 16 The connection between 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 are engaged in the locking 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 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.

[0101] like Figure 15As shown, 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.

[0102] like Figure 4 As shown, the outer peripheral wall 216 includes a tangent plane 2161 and an arcuate 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. This allows the outer peripheral wall 216 of the clamping ring 200 to make surface contact with the surface of the clamp 30 near the clamping ring 200. Compared to point contact between a plane and an arcuate surface, surface contact makes it difficult for the clamp 30 to rotate relative to the clamping ring 200.

[0103] In some embodiments, multiple lugs 240 may be provided and respectively disposed 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.

[0104] 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. For example... Figure 4 As shown, 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 along the circumference of the ring body 210. The first lug 2401 is disposed on the outer circumferential surface of the first half-ring 2131, and the second lug 2402 is disposed 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.

[0105] like Figure 5 As shown, 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, enabling it to avoid the suturing area 100b of the suture ring 100, further facilitating the suturing of the suture ring 100 to the outer wall of the heart.

[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. If the first lug 2401 is to be avoided from the suturing area 100b of the suturing ring 100, the radial width of the first half-ring 2131 must be further reduced, which makes the strength of the first half-ring 2131 insufficient. Therefore, it is not necessary to avoid the suturing area 100b of the suturing ring 100.

[0107] 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.

[0108] Specifically, such as Figure 5 As shown, the first half-ring 2131 and the second half-ring 2132 have multiple first suture holes M along their circumference on the side away from the second connecting arm 220. The second half-ring 2132 has multiple second suture holes N along its circumference on the side near the second connecting arm 220 (i.e., the part with the second lug 2402). The distance between two adjacent first suture holes M is equal, defined as a third distance H3. 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 on the strength of the second half-ring 2132.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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 embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A ventricular connection mechanism, characterized by, The heart chamber connecting mechanism comprises: a suture ring having a first through hole and a suture area surrounding the first through hole; a clamping ring comprising a ring body and a connecting end portion, the ring body is arranged on the suture ring, the suture area is located on the outer periphery of the ring body, the connecting end portion comprises a first connecting arm and a second connecting arm which are spaced along the circumference of the ring body; and a locking device connected to the connecting end portion, 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 portion so as to switch the locking device between a flat state and a turned state, the locking device comprises a first swing arm and a second swing arm, the first swing arm is rotationally connected with the first connecting arm, and the second swing arm is rotationally connected with the second connecting arm; wherein, in the flat state, the locking device is located on the outer periphery of the ring body and protrudes radially along the ring body; in the turned state, the side of the locking device away from the connecting end portion 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.

2. The ventricular connection mechanism of claim 1, wherein, The locking device further comprises a connecting rod and a locking piece, the connecting rod is connected with the second swing arm, the locking piece has a rotating end and a locking end, the rotating end is rotationally connected with the connecting rod, and the rotating end is capable of rotationally abutting against the first swing arm, and the locking end is capable of engaging 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, so as to adjust the distance between the first connecting arm and the second connecting arm, and to adjust the size of the inner diameter of the ring body, and 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.

3. The ventricular connection mechanism of claim 2, wherein, The ring body is an open ring, the first connecting arm and the second connecting arm are respectively fixed to the circumferentially opposite two 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, the other end is rotationally connected with the locking piece, and the middle part of the connecting rod is slidably arranged in the guide groove; the rotating end of the locking piece is cam-shaped, and the rotating end is capable of rotationally abutting against the side of the first swing arm away from the second swing arm.

4. The ventricular connection mechanism of claim 2, wherein, The suture ring has a mounting surface for mounting the clamping ring, wherein: the first swing arm has a first rotation axis rotating around the second connecting arm, and the first rotation axis is parallel to the mounting surface; and / or the rotating end of the locking piece has a second rotation axis rotating around the first swing arm, in the flat state, the second rotation axis is perpendicular to the mounting surface, and in the turned state, the second rotation axis intersects with or is parallel to the mounting surface.

5. The ventricular connection mechanism of claim 1, wherein, The heart chamber connecting mechanism further comprises a limiting structure, the limiting structure comprises a positioning portion arranged on the connecting end portion and a cooperating portion arranged on the locking device, the positioning portion is capable of engaging with the cooperating portion to lock the locking device in the flat state or the turned state.

6. The ventricular connection mechanism according to claim 5, wherein the connection end portion has a first top surface facing away from the suture ring, and the positioning portion comprises a first positioning portion arranged on the first top surface, and in the flipped state, the matching portion is capable of engaging with the first positioning portion to lock the locking device in the flipped state. And / or, the connection end portion has a first side surface facing away from the central axis of the ring body in the radial direction, and the positioning portion comprises a second positioning portion arranged on the first side surface, and in the flat state, the matching portion is capable of engaging 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 provided as a protruding structure, and the other is provided as a groove structure. The connection end portion comprises a first connection arm and a second connection arm, and the locking device comprises a first swing arm, a second swing arm, a connecting rod, and a locking piece, the first swing arm is rotationally connected with the first connection arm, the second swing arm is rotationally connected with the second connection arm, the connecting rod is connected with the second swing arm, the locking piece has a rotating end and a locking end, the rotating end is rotationally connected with the connecting rod and is capable of rotationally abutting against the first swing arm, and the locking end is capable of engaging with the second swing arm; wherein:

7. The ventricular connection mechanism of claim 5, wherein, The matching portion is arranged on the first swing arm, and the positioning portion is arranged on the first connection arm. Or, the matching portion is arranged on the second swing arm, and the positioning portion is arranged on the second connection arm. The ring body has a third top surface facing away from the suture ring, and when the locking device is in the flipped state, the locking device and the third top surface form a first included angle a, wherein a≤90°.

8. The ventricular connection mechanism of claim 1, wherein, The ring body has an outer peripheral wall, and the clamping ring further comprises a lug, the lug and the connection end portion are arranged on the outer peripheral wall, and the lug is capable of being clamped by a clamp.

9. The ventricular connection mechanism according to any one of claims 1 to 8, characterized in that The outer peripheral wall comprises a tangent plane and a circular arc surface connected with the tangent plane, and the lug protrudes from the tangent plane in the radial direction of the ring body.

10. The ventricular connection mechanism of claim 9, wherein, And / or, the lug comprises a first lug and a second lug, the first lug and the second lug are arranged at intervals in the circumferential direction of the ring body, the first lug and the central axis of the ring body form a first distance H1, and the second lug and the central axis of the ring body form a second distance H2, wherein H2 A ventricular assist device and a ventricular connection mechanism according to any one of claims 1 to 10 are comprised; 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.

11. A ventricular assist system, characterized by ​

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