Ventricular connection mechanism and ventricular assistance system

Abstract

A ventricular connection mechanism (1) and a ventricular assistance system. The ventricular connection mechanism (1) comprises a suture ring (10), a clamping assembly (20), and a stopper (50). The clamping assembly (20) comprises an annular disc (30) and a clamping ring (22). The annular disc (30) is provided with a first opening (363). The clamping ring (22) is fixedly connected to the annular disc (30) and provided with a second opening (21) corresponding to the position of the first opening (363). The size of the second opening (21) is adjustable. The stopper (50) is connected to the annular disc (30), and the position of the stopper corresponds to the position of the first opening (363), so that the stopper (50) and the annular disc (30) together form a closed annular structure (100). A fixing structure (200) of the annular structure (100) can allow the annular structure (100) to be fixedly connected to the suture ring (10), and the fixing structure is disposed around an inner hole of the suture ring (10).

Description

Ventricular connection mechanism and ventricular assist system

[0001] This application claims priority to the Chinese patent application No. 202311868794.9 filed with the China Patent Office on December 30, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of medical device technology, and in particular to a ventricular connection mechanism and a ventricular assist system. Background Art

[0003] Blood pumps assist the heart in pumping blood and are commonly used to treat heart failure. During blood pump implantation, a ventricular connection mechanism is typically used to secure the pump to the heart. However, conventional ventricular connection mechanisms are prone to blood leakage after blood pump installation, requiring improvement. Summary of the Invention

[0004] Based on this, the present application provides a ventricular connection mechanism and a ventricular assist system that can reduce the probability of blood leaking from the first opening of the annular disk and the gap between the sewing ring and the annular disk.

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

[0006] Suture ring;

[0007] a clamping assembly, the clamping assembly comprising an annular disk and a clamping ring, the annular disk having a first opening, the clamping ring being fixedly connected to the annular disk, the clamping ring having a second opening, the size of the second opening being adjustable, and the inner diameter of the clamping ring can be adjusted by adjusting the size of the second opening; and

[0008] A stopper, the stopper is connected to the annular disk, and the position of the stopper corresponds to the position of the first opening, so that the stopper and the annular disk together form a closed annular structure, and a fixing structure is provided on the annular structure, and the fixing structure can fix the annular structure to the sewing ring, and the fixing structure is arranged around the inner hole of the sewing ring.

[0009] An embodiment of the second aspect of the present application provides a ventricular assist system, which includes a ventricular assist device and the above-mentioned ventricular connection mechanism. The ventricular assist device has an inlet tube, which can be passed through the clamping ring, and the clamping ring can clamp the inlet tube.

[0010] The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the invention will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0012] FIG1 is a schematic structural diagram of a ventricular connection mechanism provided in one embodiment.

[0013] FIG2 is a schematic structural diagram of the ventricular connection mechanism shown in FIG1 with the sewing ring hidden.

[0014] FIG3 is a rear view of the ventricular connection mechanism shown in FIG2 .

[0015] FIG. 4 is a partial exploded view of the ventricular connection mechanism shown in FIG. 3 .

[0016] FIG5 is a schematic structural diagram of the stopper of the ventricular connection mechanism shown in FIG1 from one viewing angle.

[0017] FIG6 is a schematic structural diagram of the stopper shown in FIG5 from another perspective.

[0018] FIG. 7 is a front view of the ventricular connection mechanism shown in FIG. 2 .

[0019] FIG8 is a partial enlarged view of the ventricular connection mechanism at point A shown in FIG7 .

[0020] FIG9 is a cross-sectional view of the ventricular connection mechanism shown in FIG7 along the XX direction.

[0021] FIG10 is a partial enlarged view of the ventricular connection mechanism at point B shown in FIG9 . DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the following further describes this application in detail with reference to the accompanying drawings, i.e., embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0023] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0024] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0025] In order to illustrate the technical solution of the present application, the following description is given with reference to specific drawings and embodiments.

[0026] During a blood pump implantation procedure, a ventricular connection mechanism is typically used to securely mount the blood pump to the heart. Specifically, the ventricular connection mechanism is secured to the outer wall of the heart, and the blood pump's inlet tube passes through the ventricular connection mechanism and extends into the ventricle, where it is then locked securely. The inventors of this application discovered that due to the uneven surface of the heart, the doctor pulling on the ventricular connection mechanism during the implantation procedure, and the lack of structural support for the sewing ring at the opening of the annular disk, the sewing ring is susceptible to deformation at the opening of the annular disk. This increases the gap between the annular disk and the sewing ring of the ventricular connection mechanism, making the blood pump susceptible to blood leakage when installed in a conventional ventricular connection mechanism.

[0027] In order to improve at least some of the above problems, the present application provides a ventricular connection mechanism and a ventricular assist system, which are connected to the annular disk via a stopper, and the position of the stopper corresponds to the position of the opening of the annular disk, so that the stopper and the annular disk together form a closed annular structure, and the annular structure is provided with a fixing structure that can fix the annular structure to the sewing ring, and the fixing structure is arranged around the inner hole of the sewing ring, so that the annular structure can support the sewing ring around the inner hole of the sewing ring, thereby enhancing the stability of the overall structure of the sewing ring, thereby reducing the problem of increasing the gap between the sewing ring and the annular disk due to deformation of the sewing ring during the process of suturing the sewing ring to the heart, and reducing the probability of blood leaking from the opening of the annular disk and the gap between the sewing ring and the annular disk. The ventricular connection mechanism and ventricular assist system provided by the present application are described in detail below in conjunction with the specific embodiments and the drawings in the specification.

[0028] 1 to 3 , an embodiment of the present application provides a ventricular connection mechanism 1 for fixing a ventricular assist device to the heart. Specifically, the ventricular connection mechanism 1 of one embodiment includes a sewing ring 10 , a clamping assembly 20 , and a stopper 50 .

[0029] The sewing ring 10 is used to be fixed to the heart. In some embodiments, the sewing ring 10 is sutured to the heart by sutures. Furthermore, the sewing ring 10 is an annular structure with an inner hole, and the inner hole of the sewing ring 10 is used to allow the inlet tube of the ventricular assist device to pass through.

[0030] The sewing ring 10 is a generally flat ring structure and includes a first sewing surface 11 and a second sewing surface 12 opposite to each other, wherein the first sewing surface 11 can abut against the outer wall of the heart, and the second sewing surface 12 is provided on a side of the sewing ring 10 away from the first sewing surface 11 .

[0031] In the present embodiment, the material of the sewing ring 10 is a flexible material, which facilitates the sewing ring 10 to better fit the outer wall of the heart. Specifically, the sewing ring 10 may include a silicone member and a suture cloth coated on the silicone member, that is, the first suture surface 11 and the second suture surface 12 may be two surfaces of the suture cloth coated on the silicone member in the axial direction of the sewing ring 10. The axial direction of the sewing ring 10 refers to the extension direction of the central axis of the sewing ring 10. The silicone member has good biocompatibility and is also easy to pass through the suture thread, thereby facilitating the sewing ring 10 to be sutured to the heart. In other embodiments, the silicone member in the sewing ring 10 can also be replaced by TPE (Thermoplastic elastomer), soft PVC (Polyvinyl chloride, polyvinyl chloride), etc.

[0032] Continuing with Figures 1, 3, and 4, the clamping assembly 20 includes an annular disk 30 and a clamping ring 22. The annular disk 30 is fixedly connected to the second suture surface 12 of the suture ring 10. The annular disk 30 has a first opening 363. The annular disk 30 also has a first end 361 and a second end 362 that form the first opening 363. The first end 361 and the second end 362 are arranged opposite each other along the circumference of the annular disk 30, and the first end 361 and the second end 362 are spaced apart to form the first opening 363. The circumferential direction of the annular disk 30 refers to the circumferential direction of the annular disk 30. The annular disk 30 is a rigid structure and may be made of stainless steel, titanium alloy, or the like.

[0033] The clamping ring 22 is fixedly connected to the annular disk 30. The clamping ring 22 and the annular disk 30 are arranged substantially coaxially. Specifically, the clamping ring 22 is arranged on the inner periphery of the annular disk 30.

[0034] The clamping ring 22 has a second opening 21, and the size of the second opening 21 is adjustable. By adjusting the size of the second opening 21, the inner diameter of the clamping ring 22 can be adjusted, so that the clamping ring 22 has a certain elastic deformation ability, that is, the clamping ring 22 can shrink or expand along its radial direction to adjust its own inner diameter, and the inlet tube of the ventricular assist device (not shown) can be passed through the clamping ring 22. The clamping ring 22 is an open ring, and the second opening 21 is an opening in the circumferential direction of the clamping ring 22. The circumferential direction of the clamping ring 22 refers to the circumferential direction of the clamping ring 22, and the radial direction of the clamping ring 22 refers to the diameter or radius direction of the clamping ring 22. In the illustrated embodiment, the second opening 21 can be a portion of the first opening 363. In other embodiments, one end of the clamping ring 22 in the axial direction of the sewing ring 10 is fixedly connected to the annular disk 30.

[0035] The clamping assembly 20 also includes a first connecting arm 23 and a second connecting arm 24. The first connecting arm 23 is connected to one end of the clamping ring 22, and the second connecting arm 24 is connected to the other end of the clamping ring 22. The first connecting arm 23 can move closer to or away from the second connecting arm 24 to adjust the size of the second opening 21, thereby adjusting the inner diameter of the clamping ring 22.

[0036] In some embodiments, the first connecting arm 23 and the second connecting arm 24 are both connected to the outside of the clamping ring 22. In some embodiments, the first connecting arm 23 and the second connecting arm 24 are respectively connected to both ends of the circumference of the clamping ring 22. In this case, the second opening 21 is formed between the first connecting arm 23 and the second connecting arm 24. In some embodiments, the second connecting arm 24 is also connected to the second end 362 of the annular disk 30 and extends outward from the first opening 363.

[0037] The stopper 50 is fixedly disposed on the second suture surface 12 of the sewing ring 10. For example, the stopper 50 is sewn to the sewing ring 10 via sutures. The stopper 50 is connected to the annular disk 30, and the position of the stopper 50 corresponds to the position of the first opening 363, so that the stopper 50 and the annular disk 30 together form a closed annular structure 100. The position of the stopper 50 corresponding to the position of the first opening 363 means that the stopper 50 is disposed at the first opening 363 of the annular disk 30.

[0038] A fixing structure 200 is provided on the annular structure 100 . The fixing structure 200 can fixedly connect the annular structure 100 to the sewing ring 10 . The fixing structure 200 is disposed around the inner hole of the sewing ring 10 .

[0039] In this embodiment, the annular disk 30 is provided with a plurality of first suture holes 33, the stopper 50 is provided with a plurality of second suture holes 53, and the ventricular connection mechanism 1 further includes sutures (not shown), which are passed through the plurality of first suture holes 33, the plurality of second suture holes 53, and the sewing ring 10 to secure the annular structure 100 to the sewing ring 10. That is, both the annular disk 30 and the stopper 50 can be connected to the sewing ring 10 via the sutures. The plurality of first suture holes 33, the plurality of second suture holes 53, and the sutures together constitute the fixing structure 200.

[0040] In other embodiments, the fixing structure 200 may also be an adhesive disposed between the annular structure 100 and the sewing ring 10, that is, the annular structure 100 is bonded to the sewing ring 10 via the adhesive. In some embodiments, the fixing structure 200 may also be other structures capable of fixedly connecting the annular structure 100 to the sewing ring 10.

[0041] In this embodiment, along the axial direction of the sewing ring 10, the stopper 50 is located between the sewing ring 10 and the first connecting arm 23, so that the first connecting arm 23 can extend outward from the side of the stopper 50 facing away from the sewing ring 10 through the first opening 363. The stopper 50 will not block the movement of the first connecting arm 23, so that the first connecting arm 23 can move circumferentially along the annular disk 30 in the first opening 363 to adjust the inner diameter of the clamping ring 22 to clamp the inlet tube of the ventricular assist device.

[0042] The stopper 50 includes a first connecting end 541 and a second connecting end 551 opposite each other. The first connecting end 541 is connected to the first end 361 of the annular disk 30, and the second connecting end 551 is connected to the second end 362 of the annular disk 30. The stopper 50 fills the first opening 363 of the annular disk 30, so that the annular disk 30 and the stopper 50 together form a closed annular structure 100.

[0043] The ventricular connection mechanism 1 adjusts the inner diameter of the clamping ring 22 by adjusting the size of the second opening 21, enabling the clamping ring 22 to clamp the inlet tube of the ventricular assist device. The clamping ring 22 is connected to the annular disk 30 via a stopper 50, and the position of the stopper 50 corresponds to the position of the first opening 363, so that the stopper 50 and the annular disk 30 together form a closed annular structure 100. The annular structure 100 is provided with a fixing structure 200 that securely connects the annular structure 100 to the sewing ring 10. The fixing structure 200 surrounds the inner hole of the sewing ring 10, supporting the sewing ring 10. This enhances the structural stability of the sewing ring 10, thereby reducing the problem of increased gap between the sewing ring 10 and the annular disk 30 due to deformation of the sewing ring 10 during sewing to the heart, and reducing the probability of blood leakage from the first opening 363 of the annular disk 30 and the gap between the sewing ring 10 and the annular disk 30.

[0044] Continuing with Figures 1, 3, and 4, the annular disk 30 surrounds and connects to the clamping ring 22. Specifically, the annular disk 30 includes a first half ring 31 and a second half ring 32 connected to each other, wherein the junction between the first half ring 31 and the second half ring 32 and the first opening 363 are radially opposite each other along the annular disk 30, the first end 361 is located at the end of the first half ring 31 away from the second half ring 32, and the second end 362 is located at the end of the second half ring 32 away from the first half ring 31.

[0045] Furthermore, the first half ring 31 is spaced apart from the clamping ring 22, and the second half ring 32 is fixedly connected to the clamping ring 22. This ensures the elastic deformation ability of the clamping ring 22 and prevents the clamping ring 22 from being unable to retract after the stopper 50 connects the first end 361 and the second end 362 of the annular disk 30.

[0046] The annular disk 30 includes a disk body 311 and a boss 321 provided on the disk body 311 , wherein a portion of the boss 321 and the disk body 311 constitutes a first half ring 31 , and another portion of the boss 321 and the disk body 311 constitutes a second half ring 32 .

[0047] The boss 321 is disposed on the inner circumference of the disc body 311. The inner circumference of the boss 321 forms a cocircumferential surface with the inner circumference of the disc body 311, and the boss 321 can contact the sewing ring 10. The first suture hole 33 is provided on the boss 321. Exemplarily, the boss 321 is connected to the second suture surface 12 of the sewing ring 10. The disc body 311 is spaced apart from the sewing ring 10 to facilitate clamping of the ventricular connection mechanism 1; the disc body 311 can contact the housing of the ventricular assist device.

[0048] Referring to Figures 1 to 3, in one embodiment, the ventricular connection mechanism 1 further includes a locking assembly 40. The locking assembly 40 is connected to the clamping assembly 20. In the illustrated embodiment, the locking assembly 40 is rotatably abutted against the first connecting arm 23. When the locking assembly 40 rotates, the first connecting arm 23 can be moved toward the second connecting arm 24, thereby reducing the size of the second opening 21 and reducing the inner diameter of the clamping ring 22. The locking assembly 40 is also engaged with the second connecting arm 24 to maintain the inner diameter of the clamping ring 22. In one embodiment, the locking assembly 40 can also be connected to both the first connecting arm 23 and the second connecting arm 24. For example, the locking assembly 40 is rotatably provided on the first connecting arm 23 and is engaged with the second connecting arm 24.

[0049] The locking assembly 40 has a locked state and a released state. When the locking assembly 40 is engaged with the second connecting arm 24, placing the locking assembly 40 in the locked state, the locking assembly 40 drives the first connecting arm 23 toward the second connecting arm 24, causing the clamping ring 22 of the clamping assembly 20 to retract radially inward, thereby clamping the inlet pipe passing therethrough. When the locking assembly 40 is released from the engagement with the second connecting arm 24, placing the locking assembly 40 in the released state, the retracted state of the clamping ring 22 is released, and the clamping ring 22 expands radially under its own elastic action, thereby releasing the inlet pipe.

[0050] When implanting a ventricular assist device, the sewing ring 10 is first sutured to the heart, and then the inlet tube of the ventricular assist device is passed through the sewing ring 10 and the clamping ring 22. Finally, the locking assembly 40 drives the first connecting arm 23 toward the second connecting arm 24 to move the clamping ring 22 inward along its radial direction, so that the clamping ring 22 clamps the inlet tube of the ventricular assist device, thereby fixing the ventricular assist device on the heart.

[0051] Referring to Figures 1 and 3 , in one embodiment, the locking assembly 40 includes a base 41 and a locking member 42. The base 41 is connected to the second connecting arm 24. One end of the locking member 42 is rotatably connected to the base 41. The other end of the locking member 42 is provided with an engaging portion 421, which is configured to engage with the second connecting arm 24. Specifically, the second connecting arm 24 is provided with a curved surface 241, and the engaging portion 421 is configured to engage with the curved surface 241.

[0052] When the locking member 42 is driven to rotate relative to the base 41, the end of the locking member 42 closest to the base 41 pushes the first connecting arm 23 toward the second connecting arm 24, thereby causing the clamping ring 22 to retract radially inward. Specifically, the end of the locking member 42 closest to the base 41 rotates and abuts the first connecting arm 23. Rotating the locking member 42 relative to the base 41 pushes the first connecting arm 23 toward the second connecting arm 24, thereby narrowing the second opening 21 and reducing the inner diameter of the clamping ring 22. As the locking member 42 continues to rotate, the clamping ring 22 retracts into position to clamp the inlet pipe. When the engaging portion 421 contacts the curved surface 241 of the second connecting arm 24, the engagement between the engaging portion 421 and the second connecting arm 24 maintains the clamping ring 22 in its clamped position. When the inlet tube needs to be loosened, the locking assembly 40 is put into a loosened state by releasing the engagement between the locking portion 421 and the second connecting arm 24, thereby releasing the retracted state of the clamping ring 22 and allowing the clamping ring 22 to expand radially under its own elastic action to loosen the inlet tube. In other embodiments, the locking assembly 40 can be rotatably abutted against the first connecting arm 23 and can be connected to the second connecting arm 24, and the locking assembly 40 can drive the first connecting arm 23 and the second connecting arm 24 closer to each other, so that the clamping ring 22 retracts radially, thereby clamping the inlet tube of the ventricular assist device. It is understandable that there are many other ways for the locking assembly 40 to drive the first connecting arm 23 and the second connecting arm 24 closer to each other or away from each other, which are not limited to the above embodiments and will not be elaborated here.

[0053] In this embodiment, the stopper 50 is fixedly connected to both the sewing ring 10 and the annular disk 30. In the illustrated embodiment, the stopper 50 is welded to the annular disk 30. It is understood that in other embodiments, the stopper 50 may also be connected to the annular disk 30 using an adhesive or the like. In this embodiment, both the stopper 50 and the annular disk 30 are rigid structures, which facilitates supporting the sewing ring 10 and reduces deformation of the sewing ring 10 during the suturing process. For example, the stopper 50 and the annular disk 30 can both be made of titanium alloy or stainless steel. Preferably, the stopper 50 and the annular disk 30 can be made of the same material, which facilitates welding the stopper 50 and the annular disk 30 together and avoids the difficulty of welding dissimilar materials.

[0054] 3 , 5 , and 6 , optionally, in one embodiment, the stopper 50 and the annular disk 30 are both configured as arc-shaped, and the central axis of the circle corresponding to the arc of the stopper 50 is coaxial with the central axis of the circle of the annular disk 30. This allows the stopper 50 to better match the appearance of the annular disk 30, and the stopper 50 and the annular disk 30 to form a complete annular structure. When the first connecting end 541 and the second connecting end 551 of the stopper 50 are respectively connected to the first end 361 and the second end 362 of the annular disk 30, that is, when the first connecting end 541 of the stopper 50 is connected to the first end 361 of the annular disk 30 and the second connecting end 551 of the stopper 50 is connected to the second end 362 of the annular disk 30, the stopper 50 and the annular disk 30 can be combined to form a complete annular structure when viewed from above the ventricular connection mechanism 1, making the ventricular connection mechanism 1 more concise as a whole.

[0055] 1 , 4 , and 5 , optionally, in one embodiment, first suture holes 33 are provided at both the first end 361 and the second end 362 of the annular disk 30. Specifically, the first suture holes 33 are used to pass sutures through to facilitate the suture connection between the annular disk 30 and the sewing ring 10. Second suture holes 53 are provided at both the first connection end 541 and the second connection end 551 of the stopper 50.

[0056] For ease of description, the first suture holes at the end closest to the first end 361 and the end closest to the second end 362 are defined as first suture holes 33a, and the remaining first suture holes are defined as first suture holes 33b. The second suture holes at the end closest to the first connecting end 541 and the end closest to the second connecting end 551 are defined as second suture holes 53a, and the second suture holes located at the first opening 363 (i.e., the remaining second suture holes) are defined as second suture holes 53b.

[0057] Furthermore, the first suture hole 33a at the first end 361 is coaxial with the second suture hole 53a at the first connecting end 541, and the first suture hole 33a at the second end 362 is coaxial with the second suture hole 53a at the second connecting end 551. This prevents the first suture holes 33a at the first end 361 and the second end 362 from being blocked by the stopper 50, and also prevents the second suture holes 53a at the first connecting end 541 and the second connecting end 551 from being blocked by the annular disk 30, thereby facilitating the sewing connection between the annular disk 30 and the stopper 50 and the sewing ring 10.

[0058] In this embodiment, when the first connecting arm 23 approaches the second connecting arm 24, that is, when the locking assembly 40 is in the locked state, at least one second suture hole 53b can be exposed from the first opening 363, preventing the first connecting arm 23 from blocking the at least one second suture hole 53b. To facilitate the suturing of the stopper 50, the annular disk 30, and the sewing ring 10, the suturing operation is typically performed when the locking assembly 40 is in the locked state. When the locking assembly 40 is in the locked state, at least one second suture hole 53b can be exposed from the first opening 363, facilitating the suturing operation of the stopper 50 and the sewing ring 10 at the first opening 363. It should be noted that when the first connecting arm 23 moves toward the second connecting arm 24, it will not block the other second suture holes 53.

[0059] In one embodiment, the first suture hole 33a of the first end 361 is coaxial with the second suture hole 53a of the first connecting end 541, and the first suture hole 33a of the second end 362 is not coaxial with the second suture hole 53a of the second connecting end 551. In another embodiment, the first suture hole 33a of the first end 361 is not coaxial with the second suture hole 53a of the first connecting end 541, and the first suture hole 33a of the second end 362 is coaxial with the second suture hole 53a of the second connecting end 551.

[0060] Referring to Figures 2 and 3 , the annular disk 30 further comprises a plurality of first recesses 34 for accommodating sutures. A first suture hole 33 is provided between two adjacent first recesses 34. The first recesses 34 communicate with the adjacent first suture holes 33, meaning that a first recess 34 is provided between two adjacent first suture holes 33. This allows a suture extending from a first suture hole 33 to pass along the first recess 34 into the next first suture hole 33, preventing the suture from protruding from the surface of the annular disk 30 and hindering installation of the ventricular assist device.

[0061] Referring to Figures 1, 6, and 7, in one embodiment, the stopper 50 is further provided with a plurality of second recesses 58 capable of accommodating sutures. A second suture hole 53 is provided between two adjacent second recesses 58, and the second recesses 58 communicate with two adjacent second suture holes 53. In other words, a second recess 58 is provided between two adjacent second suture holes 53. This allows a suture extending from one second suture hole 53 to pass along the second recess 58 into the next second suture hole 53, preventing the suture sewn to the stopper 50 and the sewing ring 10 from protruding beyond the stopper 50 and contacting the first connecting arm 23, thereby preventing the movement of the first connecting arm 23 from being affected.

[0062] In one embodiment, a plurality of first grooves 34 and a plurality of first suture holes 33 are arranged on a first circle C1, a plurality of second grooves 58 and a plurality of second suture holes 53 are arranged on a second circle C2, the center of the first circle C1, the center of the second circle C2 and the center of the circle where the annular disk 30 is located are located on the same straight line, and the radii of the first circle C1 and the second circle C2 are equal, so that the suture line can pass smoothly through the junction of the annular disk 30 and the stopper 50 through the first groove 34 and the second groove 58, avoiding the suture line being located outside the first groove 34 and the second groove 58 due to the different radii of the first circle C1 and the second circle C2, avoiding affecting the installation of the ventricular assist device.

[0063] The centers of the first circle C1, the second circle C2, and the circle containing the annular disk 30 lie on the same straight line, and the radii of the first circle C1 and the second circle C2 are equal. This prevents a sudden change in radius at the junction of the first circle C1 and the second circle C2, making the suturing of the annular disk 30 and the stopper 50 to the sewing ring 10 smoother and simpler. Furthermore, the suture lines received in the first and second recesses 34, 58 form a circumference when viewed from above the ventricular connection mechanism 1, thereby improving the appearance consistency of the ventricular connection mechanism 1. The "top view" of the connection mechanism 1 refers to viewing the connection mechanism 1 from the direction of the central axis of the circle containing the annular disk 30. In this embodiment, the widths of the first and second recesses 34, 58 are equal, where the width of the first and second recesses 34, 58 refers to the length of the first and second recesses 34, 58 in the radial direction of the annular disk 30. In other embodiments, the widths of the first and second recesses 34, 58 may differ.

[0064] 3 and 7 , optionally, in one embodiment, the first end 361 has a first end surface 3611 , and the second end 362 has a second end surface 3621 . The first end surface 3611 and the second end surface 3621 are opposite and spaced apart along the circumference of the annular disk 30 to form a first opening 363 .

[0065] At least one of the first end surface 3611 and the second end surface 3621 is tangent to an edge of the second suture hole 53 b located at the first opening 363 .

[0066] 4, 7, and 8, in the illustrated embodiment, the second end surface 3621 is tangent to the edge of the second suture hole 53b located in the first opening 363 and closer to the second end surface 3621. The second suture hole 53b is the second suture hole 53 closest to the second end surface 3621 among all the second suture holes 53 between the first end surface 3611 and the second end surface 3621. This allows the suture thread passing through the first suture hole 33a of the second end 362 to enter the second suture hole 53b along the second end surface 3621, or vice versa. This reduces the chance of the suture thread coming into contact with other structures at this location. Furthermore, the second end surface 3621 supports the suture thread, thereby reducing the chance of the suture thread being cut.

[0067] In one embodiment, the first end surface 3611 may also be tangent to the edge of the second suture hole 53b located at the first opening 363 and closer to the first end surface 3611. In this way, the suture thread passing through the first suture hole 33a can enter the corresponding second suture hole 53b along the first end surface 3611, reducing the probability of the suture thread contacting other structures at this location. The first end surface 3611 can also support the suture thread, thereby reducing the probability of the suture thread being cut, allowing the annular disk 30 and the stopper 50 to be stably sewn together with the sewing ring 10. In another embodiment, both the first end surface 3611 and the second end surface 3621 may be tangent to the edge of the second suture hole 53b located at the first opening 363.

[0068] Referring to Figures 1 to 5, in one embodiment, the annular disk 30 has a first surface 351 and a second surface 352 axially opposed to each other. The first surface 351 is located on the boss 321 and is opposite and connected to the second suture surface 12 of the sewing ring 10; the second surface 352 is located on the disk body 311. The stopper 50 has a first connecting surface 51 and a second connecting surface 52 axially opposed to each other. The first connecting surface 51 is opposite and connected to the second suture surface 12 of the sewing ring 10; the second connecting surface 52 is located on the side of the stopper 50 facing away from the sewing ring 10. Furthermore, the first connecting surface 51 is coplanar with the first surface 351, ensuring that the junction between the stopper 50 and the annular disk 30 is as tightly sealed as possible with the sewing ring 10, preventing any gaps between the junction and the sewing ring 10, thereby further reducing the risk of blood leakage.

[0069] Optionally, in one embodiment, a first receiving groove 371 is defined at the first end 361, and a second receiving groove 372 is defined at the second end 362. Both the first receiving groove 371 and the second receiving groove 372 are exposed on the first surface 351, with the first receiving groove 371 penetrating the first end surface 3611 and the second receiving groove 372 penetrating the second end surface 3621.

[0070] The first connecting end 541 of the stopper 50 is disposed in the first receiving groove 371, which can, to a certain extent, limit the movement of the first connecting end 541 relative to the annular disk 30. The second connecting end 551 of the stopper 50 is disposed in the second receiving groove 372, which can, to a certain extent, limit the movement of the second connecting end 551 relative to the annular disk 30. In this way, while the first connecting surface 51 of the stopper 50 and the first surface 351 of the annular disk 30 are coplanar, the connection strength between the stopper 50 and the annular disk 30 is also improved.

[0071] Furthermore, the stopper 50 further includes a first connecting side surface 54, a second connecting side surface 55, and a first connecting end surface 5412. The first connecting side surface 54 and the second connecting side surface 55 are two radially opposite sides of the stopper 50 in the annular disk 30. The first connecting end surface 5412 is provided at the first connecting end 541 and is connected between the first connecting side surface 54 and the second connecting side surface 55. The first connecting side surface 54, the second connecting side surface 55, and the first connecting end surface 5412 are all connected to the first connecting surface 51.

[0072] The first connecting side surface 54 and the second connecting side surface 55 are both connected between the first connecting surface 51 and the second connecting surface 52. A chamfer 57 is provided at the connection between the first connecting surface 51 and the first connecting side surface 54 at the first connecting end 541. The chamfer 57 at the first connecting end 541 avoids sharp edges at the first connecting end 541, preventing injuries to the operator when suturing the stopper 50 to the sewing ring 10.

[0073] Furthermore, the first connecting end face 5412 contacts the groove wall of the first accommodating groove 371, and the first connecting side face 54 and the second connecting side face 55 are exposed outside the first accommodating groove 371, that is, the first accommodating groove 371 has a first bottom wall 3712 and a first side wall 3714 connected to the first bottom wall 3712, and the first bottom wall 3712 and the first side wall 3714 are both arranged at the first end 361 of the annular disk 30. The first accommodating groove 371 is jointly defined by the first bottom wall 3712 and the first side wall 3714. The first bottom wall 3712 is opposite to the first connecting face 51, and the first side wall 3714 is opposite to and abuts against the first connecting end face 5412, that is, the first accommodating groove 371 is an open groove, and the side wall of the first accommodating groove 371 has no part opposite to the first connecting side face 54 and the second connecting side face 55, which can allow appropriate dimensional errors of the stopper 50. Therefore, when the second connecting end 551 is already disposed in the second receiving groove 372, the position of the first connecting end 541 relative to the first end 361 can be adjusted so that the first connecting end 541 can be accommodated in the first receiving groove 371, thereby enabling the stopper 50 to be fixedly connected to the annular disk 30. This avoids the situation where the first connecting end 541 cannot be accommodated in the first receiving groove 371 due to deformation of the annular disk 30 or excessive width of the first connecting end 541.

[0074] The stopper 50 further includes a second connecting end surface 5512 disposed at the second connecting end 551, and the second connecting end surface 5512 is connected to the first connecting surface 51. The first connecting side surface 54, the second connecting side surface 55, and the second connecting end surface 5512 contact the groove wall of the second accommodating groove 372. That is, the second accommodating groove 372 includes a second bottom wall 3722 and a second side wall 3724 connected to the second bottom wall 3722. The second accommodating groove 372 is jointly defined by the second bottom wall 3722 and the second side wall 3724. The second bottom wall 3722 and the second side wall 3724 are both disposed at the second end 362 of the annular disk 30. The second bottom wall 3722 is opposite to the second connecting surface 52, and the second side wall 3724 abuts against the first connecting side surface 54, the second connecting side surface 55, and the second connecting end surface 5512. In this way, the second connection end 551 can be adapted to be accommodated in the second receiving groove 372, that is, the shape of the second connection end 551 is the same as the shape of the second receiving groove 372, and the size of the second connection end 551 is also the same as the size of the second receiving groove 372, so that the second connection end 551 can just fill the second receiving groove 372 to avoid that after the second connection end 551 is accommodated in the second receiving groove 372, there is a gap between the side wall of the second connection end 551 and the groove wall of the second receiving groove 372 for retaining blood, that is, it can avoid thrombosis caused by blood retention.

[0075] Furthermore, the first connecting surface 51 at the second connecting end 551 is directly connected to the first connecting side surface 54 and the second connecting side surface 55. That is, there is no rounding at the connection between the first connecting surface 51 of the second connecting end 551 and the first connecting side surface 54, nor is there a rounding at the connection between the first connecting surface 51 of the second connecting end 551 and the second connecting side surface 55. This allows the second connecting end 551 to seamlessly join with the second end 362, further facilitating a sealed fit between the joint between the stopper 50 and the annular disk 30 and the sewing ring 10, thereby further reducing the risk of blood leakage.

[0076] In other embodiments, the first end 361 may not have the first receiving groove 371, and the second end 362 may not have the second receiving groove 372. The first connecting end surface 5412 of the stopper 50 may be directly fixedly connected to the first end surface 3611, and the second connecting end surface 5512 may be directly fixedly connected to the second end surface 3621, thereby also achieving a fixed connection between the stopper 50 and the annular disk 30.

[0077] 2 and 3 , optionally, in one embodiment, a side of the first connecting arm 23 near the stopper 50 defines an avoidance groove 231 to space the first connecting arm 23 from the stopper 50. For example, a gap exists between the stopper 50 and the bottom surface of the avoidance groove 231. The avoidance groove 231 extends through opposite sides of the first connecting arm 23 along the circumference of the annular disk 30 to better avoid the stopper 50. By defining the avoidance groove 231 on the side of the first connecting arm 23 near the stopper 50, the first connecting arm 23 can avoid the stopper 50, reducing the chance of the first connecting arm 23 colliding with the stopper 50 during movement and improving the smoothness of operation of the ventricular connection mechanism 1.

[0078] Furthermore, referring to Figures 3, 9, and 10, the second connecting surface 52 of the stopper 50 is arranged opposite and parallel to the bottom surface of the avoidance groove 231. The distance d between the second connecting surface 52 and the bottom surface of the avoidance groove 231 and the thickness t of the stopper 50 satisfy the following relationship: 0.3 ≤ d / t ≤ 0.7. The thickness t of the stopper 50 refers to the maximum distance between the first connecting surface 51 and the second connecting surface 52, i.e., the thickness t is the maximum thickness of the stopper 50. This ensures sufficient spacing between the stopper 50 and the bottom surface of the avoidance groove 231 while ensuring the strength of the stopper 50, preventing the first connecting arm 23 from contacting the stopper 50. When d / t is less than 0.3, while the thickness t of the stopper 50 remains unchanged, the distance d between the second connecting surface 52 and the bottom surface of the avoidance groove 231 is small, potentially causing the first connecting arm 23 to contact the stopper 50 during movement. When d / t is greater than 0.7, on the basis of the thickness t of the stopper 50 remaining unchanged, the distance d from the second connecting surface 52 to the bottom surface of the avoidance groove 231 is larger, making the second connecting arm 24 thinner, increasing the probability of the second connecting arm 24 breaking; or, on the basis of the distance d from the second connecting surface 52 to the bottom surface of the avoidance groove 231 remaining unchanged, the stopper 50 is thinner, reducing the bending strength of the stopper 50.

[0079] The present application also provides a ventricular assist system, comprising a ventricular assist device (not shown) and a ventricular connection mechanism 1 according to any of the above-described embodiments. The ventricular assist device comprises an inlet tube, which can be passed through a clamping ring 22, and the clamping ring 22 can clamp the inlet tube. A locking assembly 40 is connected to both the first connecting arm 22 and the second connecting arm 23. Thus, by driving the clamping ring 22 inwardly through the locking assembly 40, the clamping ring 22 can be driven to clamp the inlet tube along the circumference of the annular disk 30, thereby securely mounting the ventricular assist device on the heart tissue.

[0080] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A ventricular connection mechanism, characterized in that, Comprising: A suture ring; A clamping assembly, the clamping assembly includes an annular disc and a clamping ring, the annular disc has a first opening, the clamping ring is fixedly connected to the annular disc, the clamping ring has a second opening, the size of the second opening is adjustable, and the inner diameter of the clamping ring can be adjusted by adjusting the size of the second opening; And A stop member, the stop member is connected to the annular disc, and the position of the stop member corresponds to the position of the first opening, so that the stop member and the annular disc jointly form a closed annular structure, and a fixing structure is provided on the annular structure, and the fixing structure can fixedly connect the annular structure to the suture ring, and the fixing structure is arranged around the inner hole of the suture ring.

2. The ventricular connection mechanism according to claim 1, characterized in that, The stop member is arc-shaped, and the central axis of the circle corresponding to the arc where the stop member is located is coaxial with the central axis of the circle where the annular disc is located.

3. The ventricular connection mechanism according to claim 1, wherein, A plurality of first suture holes are provided on the annular disc, a plurality of second suture holes are provided on the stop member, and the ventricular connection mechanism further includes a suture line, and the suture line passes through the plurality of first suture holes, the plurality of second suture holes and the suture ring to fix the annular structure to the suture ring, wherein the plurality of first suture holes, the plurality of second suture holes and the suture line jointly constitute the fixing structure.

4. The ventricular connection mechanism according to claim 3, characterized in that The annular disc further has a plurality of first sinking grooves capable of accommodating the suture line, the first sinking grooves are provided between adjacent two of the first suture holes, and the first sinking grooves communicate with adjacent two of the first suture holes; and / or, the stop member further has a plurality of second sinking grooves capable of accommodating the suture line, the second sinking grooves are provided between adjacent two of the second suture holes, and the second sinking grooves communicate with adjacent two of the second suture holes.

5. The ventricular connection mechanism according to claim 4, wherein, The plurality of first sinking grooves and the plurality of first suture holes are arranged on a first circle; the plurality of second sinking grooves and the plurality of second suture holes are arranged on a second circle, the centers of the first circle, the second circle and the circle where the annular disc is located are on the same straight line, and the radii of the first circle and the second circle are equal.

6. The ventricular connection mechanism according to claim 3, wherein, The annular disc further has a first end face and a second end face, the first end face and the second end face are opposite and spaced apart to form the first opening, wherein: The first end face is tangent to the edge of the second suture hole located at the first opening and closer to the first end face; and / or, the second end face is tangent to the edge of the second suture hole located at the first opening and closer to the second end face.

7. The ventricular connection mechanism according to claim 3, wherein The annular disc further has a first end and a second end, the first end and the second end are spaced apart to form the first opening, the first end and the second end are both provided with first suture holes, the stop member includes opposite first connection end and second connection end, and the first connection end and the second connection end are both provided with second suture holes, wherein: The first suture hole at the first end is coaxial with the second suture hole at the first connection end; and / or, the first suture hole at the second end is coaxial with the second suture hole at the second connection end.

8. The ventricular connection mechanism according to claim 1, characterized in that, The annular disc has a first surface opposite to the suture ring; the stopper has a first connection surface opposite to the suture ring, and the first connection surface is coplanar with the first surface.

9. The ventricular connection mechanism according to claim 8, wherein The annular disc further has a first end and a second end, the first end and the second end are spaced apart to form the first opening, the first end is provided with a first receiving groove, the second end is provided with a second receiving groove, both the first receiving groove and the second receiving groove are exposed on the first surface, the stopper includes an opposite first connection end and a second connection end, the first connection end is disposed in the first receiving groove, and the second connection end is disposed in the second receiving groove.

10. The ventricular connection mechanism according to claim 9, wherein The stopper further has a first connection end surface disposed at the first connection end, the first connection end surface is connected to the first connection surface, the first receiving groove has a first bottom wall and a first side wall connected to the first bottom wall, the first receiving groove is defined by the first bottom wall and the first side wall together, the first bottom wall is opposite to the first connection surface, and the first side wall is opposite to and abuts against the first connection end surface; And / or, the stopper further has a first connection side surface, a second connection side surface and a second connection end surface disposed at the second connection end, the first connection side surface, the second connection side surface and the second connection end surface are all connected to the first connection surface, the first connection side surface is opposite to the second connection side surface, the second receiving groove has a second bottom wall and a second side wall connected to the second bottom wall, the second receiving groove is defined by the second bottom wall and the second side wall together, the second bottom wall is opposite to the first connection surface, and the second side wall abuts against the first connection side surface, the second connection side surface and the second connection end surface.

11. The ventricular connection mechanism according to claim 1, characterized in that, The clamping assembly further includes a first connection arm and a second connection arm, the clamping ring is disposed on the inner circumference of the annular disc; the first connection arm is connected to one end of the clamping ring and extends outward from the first opening; the second connection arm is connected to the other end of the clamping ring and is connected to the annular disc, and the first connection arm can approach or move away from the second connection arm to adjust the size of the second opening.

12. The ventricular connection mechanism according to claim 11, characterized in that, The stopper is located between the suture ring and the first connection arm, and an avoidance groove is formed on a side of the first connection arm close to the stopper, so that the first connection arm is spaced from the stopper.

13. The ventricular connection mechanism according to claim 12, wherein The stopper has a first connection surface and a second connection surface disposed opposite to each other, the first connection surface is opposite to the suture ring, the second connection surface is opposite to and parallel to the bottom surface of the avoidance groove, and the distance d from the second connection surface to the bottom surface of the avoidance groove and the thickness t of the stopper satisfy: 0.3 ≤ d / t ≤ 0.

7.

14. The ventricular connection mechanism according to claim 1, wherein The clamping assembly further includes a first connecting arm and a second connecting arm. The first connecting arm and the second connecting arm are respectively connected to two ends in the circumferential direction of the clamping ring. The ventricular connection mechanism further includes a locking assembly. The locking assembly includes a seat body and a locking member. The seat body is connected to the second connecting arm. One end of the locking member is rotatably connected to the seat body, and the other end of the locking member is provided with an engaging portion for engaging with the second connecting arm. When the locking member rotates relative to the seat body, it can push the first connecting arm to move towards the second connecting arm to narrow the second opening and reduce the inner diameter of the clamping ring.

15. A ventricular assist system, characterized in that, The ventricular assist system includes a ventricular assist device and the ventricular connection mechanism according to any one of claims 1-14. The ventricular assist device has an inlet tube that can pass through the clamping ring, and the clamping ring can clamp the inlet tube.

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