Ventricular connection mechanism and ventricular assist system

Abstract

This application relates to a ventricular connection mechanism and a ventricular assist system. The ventricular connection mechanism includes a suture ring, a clamping assembly, and a stop. The clamping assembly includes an annular disk and a clamping ring. The annular disk has a first opening, and the clamping ring is fixedly connected to the annular disk. The clamping ring has a second opening, the position of which corresponds to the position of the first opening. The size of the second opening is adjustable to adjust the inner diameter of the clamping ring. The stop is connected to the annular disk, and the position of the stop corresponds to the position of the first opening, so that the stop and the annular disk together form a closed annular structure. A fixing structure is provided on the annular structure, which can fix the annular structure to the suture ring. The fixing structure is arranged around the inner hole of the suture ring. The above-described ventricular connection mechanism and ventricular assist system can reduce the probability of blood leakage from the opening of the annular disk and the gap between the suture ring and the annular disk.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a ventricle connecting mechanism and a ventricle assisting system. BACKGROUND

[0002] Blood pumps can assist the heart in pumping blood and are commonly used devices for the auxiliary treatment of heart failure. In blood pump implantation surgery, a ventricle connecting mechanism is usually used to fix and install the blood pump on the heart. However, the conventional ventricle connecting mechanism is prone to blood leakage after the blood pump is installed, which needs to be improved. SUMMARY

[0003] Therefore, it is necessary to provide a ventricle connecting mechanism and a ventricle assisting system to reduce blood leakage.

[0004] In a first aspect, the present application provides a ventricle connecting mechanism, comprising:

[0005] a suture ring;

[0006] a clamping assembly, the clamping assembly comprising a ring-shaped disc and a clamping ring, the ring-shaped disc having a first opening, the clamping ring being fixedly connected to the ring-shaped disc, the clamping ring having a second opening, the size of the second opening being adjustable to adjust the inner diameter of the clamping ring through the size of the second opening; and

[0007] a stopper, the stopper being connected to the ring-shaped disc, and the position of the stopper corresponding to the position of the first opening, so that the stopper and the ring-shaped disc jointly form a closed ring-shaped structure, the ring-shaped structure being provided with a fixing structure, the fixing structure being capable of fixedly connecting the ring-shaped structure and the suture ring, the fixing structure being arranged around the inner hole of the suture ring.

[0008] The technical solutions are further described as follows:

[0009] In one embodiment, the stopper and the ring-shaped disc are both arranged in a circular arc shape, and the central axis of the circle corresponding to the circular arc of the stopper is coaxial with the central axis of the circle corresponding to the ring-shaped disc.

[0010] In one embodiment, the fixing structure comprises a plurality of first suture holes and a plurality of second suture holes, the plurality of first suture holes being arranged on the ring-shaped disc, and the plurality of second suture holes being arranged on the stopper.

[0011] In one of the embodiments, the annular disc further comprises a plurality of first grooves capable of accommodating sutures, and a first suture hole is arranged between two adjacent first grooves, and the first grooves are connected to the adjacent first suture holes.

[0012] In one of the embodiments, the first grooves and the first suture holes are arranged on a first circle, the second grooves and the second suture holes are arranged on a second circle, the centers of the first circle and the second circle and the center of the circle where the annular disc is located are located on the same straight line, and the radii of the first circle and the second circle are equal.

[0013] In one of the embodiments, the annular disc further comprises a first end surface and a second end surface, the first end surface is opposite to the second end surface and is spaced apart to form the first opening, and at least one of the first end surface and the second end surface is tangent to the edge of the second suture hole located at the first opening.

[0014] In one of the embodiments, the annular disc further comprises a first end and a second end forming the first opening, the first end and the second end are both provided with first suture holes, the stopper comprises opposite first connecting end and second connecting end, and the first connecting end and the second connecting end are both provided with second suture holes, wherein:

[0015] the first suture hole of the first end is coaxial with the second suture hole of the first connecting end; and / or, the first suture hole of the second end is coaxial with the second suture hole of the second connecting end.

[0016] In one of the embodiments, the annular disc comprises a first surface connected to the suture ring, and the stopper comprises a first connecting surface connected to the suture ring, and the first connecting surface is coplanar with the first surface.

[0017] In one of the embodiments, the annular disc further comprises a first end and a second end forming the first opening, the first end is provided with a first accommodating groove, the second end is provided with a second accommodating groove, the first accommodating groove and the second accommodating groove are both exposed on the first surface, the stopper comprises opposite first connecting end and second connecting end, the first connecting end is arranged in the first accommodating groove, and the second connecting end is arranged in the second accommodating groove.

[0018] In one of the embodiments, the stopper further comprises a first connecting side, a second connecting side, and a first connecting end surface arranged at the first connecting end, the first connecting end surface being connected between the first connecting side and the second connecting side, the first connecting side, the second connecting side, and the first connecting end surface are all connected with the first connecting surface, the first connecting end surface is in contact with the groove wall of the first accommodating groove, and the first connecting side and the second connecting side are exposed outside the first accommodating groove.

[0019] In one of the embodiments, the stopper further comprises a second connecting end surface arranged at the second connecting end, the first connecting side, the second connecting side, and the second connecting end surface are all in contact with the groove wall of the second accommodating groove.

[0020] In one of the embodiments, the clamping assembly further comprises a first connecting arm and a second connecting arm, the clamping ring is arranged at the inner periphery of the annular disc, the first connecting arm is connected to one end of the clamping ring and extends outward from the first opening, the second connecting arm is connected to the other end of the clamping ring and connected with the second end, and the first connecting arm can be selectively close to or away from the second connecting arm to adjust the size of the second opening.

[0021] In one of the embodiments, the stopper is located between the suture ring and the first connecting arm, and an avoiding groove is arranged at the side of the first connecting arm close to the stopper to be spaced apart from the stopper.

[0022] In one of the embodiments, the stopper has oppositely arranged first and second connecting surfaces, the first connecting surface is closer to the suture ring than the second connecting surface, the second connecting surface is arranged opposite and parallel to the groove bottom surface of the avoiding groove, and the distance d between the second connecting surface and the groove bottom surface of the avoiding groove and the thickness t of the stopper satisfy: 0.3≤d / t≤0.7.

[0023] In one of the embodiments, the fixing structure comprises a plurality of second suture holes arranged on the stopper, and at least one of the second suture holes can be exposed from the first opening when the first connecting arm is close to the second connecting arm.

[0024] In one of the embodiments, the material of the suture ring is a flexible material.

[0025] In a second aspect, the application further provides a ventricular assist system, which comprises a ventricular assist device and the ventricular connecting mechanism as described above, the ventricular assist device has an inlet pipe, and the inlet pipe is arranged in the clamping ring.

[0026] The ventricular connection mechanism and the ventricular assist system can adjust the inner diameter of the clamping ring through the size of the second opening, so that the clamping ring can clamp the inlet pipe of the ventricular assist device. The stopper is connected with the annular disc, and the position of the stopper corresponds to the position of the first opening, so that the stopper and the annular disc jointly form a closed annular structure, and the fixed structure for fixedly connecting the annular structure and the suture ring is arranged on the annular structure, the fixed structure is arranged around the inner hole of the suture ring, so that the annular structure can support the suture ring around the inner hole of the suture ring, and the stability of the overall structure of the suture ring is enhanced, thereby reducing the problem that the gap between the suture ring and the annular disc increases due to deformation of the suture ring in the process that the suture ring is sutured to the heart, and the probability of blood leakage from the first opening of the annular disc and the gap between the suture ring and the annular disc is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application, and the illustrative embodiments of the present application and their description serve the purpose of explaining the present application. The accompanying drawings should not be regarded as a limitation of the present application.

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and other accompanying drawings can be obtained by those skilled in the art without any creative effort on the basis of these accompanying drawings.

[0029] In addition, the drawings are not drawn in a 1:1 ratio, and the relative sizes of the various elements are only exemplarily drawn in the drawings, but not necessarily drawn in true proportions. In the drawings:

[0030] Figure 1 The structural schematic diagram of the ventricular connection mechanism provided for an embodiment.

[0031] Figure 2 The structural schematic diagram of the ventricular connection mechanism provided for an embodiment. Figure 1 The structural schematic diagram of the ventricular connection mechanism provided for an embodiment.

[0032] Figure 3 The structural schematic diagram of the ventricular connection mechanism provided for an embodiment. Figure 2 The rear view of the ventricular connection mechanism provided for an embodiment.

[0033] Figure 4 The structural schematic diagram of the ventricular connection mechanism provided for an embodiment. Figure 3 The partial exploded view of the ventricular connection mechanism provided for an embodiment.

[0034] Figure 5 The structural schematic diagram of the ventricular connection mechanism provided for an embodiment. Figure 1 The structural schematic diagram of the ventricular connection mechanism provided for an embodiment.

[0035] Figure 6 The structural schematic diagram of the ventricular connection mechanism provided for an embodiment.Figure 5 Structure diagram of the stopper from another perspective.

[0036] Figure 7 For Figure 2 Front view of the ventricular connection mechanism shown.

[0037] Figure 8 For Figure 7 Partial enlarged view of the ventricular connection mechanism shown at A.

[0038] Figure 9 For Figure 7 Sectional view of the ventricular connection mechanism shown along the direction of X-X.

[0039] Figure 10 For Figure 9 Partial enlarged view of the ventricular connection mechanism shown at B.

[0040] Explanation of reference signs:

[0041] 1, ventricular connection mechanism; 10, suture ring; 11, first suture surface; 12, second suture surface; 20, clamping assembly; 21, second opening; 22, clamping ring; 23, first connecting arm; 231, avoiding groove; 24, second connecting arm; 241, curved surface; 30, annular disc; 31, first half ring; 32, second half ring; 33, first suture hole; 311, disc body; 321, boss; 34, first sunken groove; 351, first surface; 352, second surface; 361, first end; 3611, first end surface; 362, second end; 3621, second end surface; 363, first opening; 371, first accommodating groove; 372, second accommodating groove; 40, locking assembly; 41, seat body; 42, locking piece; 421, clamping part; 50, stopper; 51, first connecting surface; 52, second connecting surface; 53, second suture hole; 541, first connecting end; 5412, first connecting end surface; 551, second connecting end; 5512, second connecting end surface; 54, first connecting side surface; 55, second connecting side surface; 57, fillet; 58, second sunken groove; 100, annular structure; 200, fixing structure; C1, first circle; C2, second circle. DETAILED DESCRIPTION

[0042] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below in combination with the drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0043] In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0044] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this application, unless otherwise explicitly specified and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0046] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on or under second feature", the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0047] It is to be noted that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In addition, it is to be understood that when a layer is referred to as being "connected", "coupled", or "supported" to another element, it can be directly connected, coupled, or supported to the other element, or intervening elements can also be present. As used herein, the term "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms are used for explanation only and not to limit the embodiments.

[0048] In the blood pump implantation surgery, it is usually necessary to use a ventricular connection mechanism to fix the blood pump on the heart. Specifically, the ventricular connection mechanism is fixed to the outer wall of the heart, the liquid inlet pipe of the blood pump passes through the ventricular connection mechanism and extends into the ventricle, and the liquid inlet pipe is locked through the ventricular connection mechanism. The inventors of the present application found that due to the unevenness of the surface of the heart, and the pulling of the ventricular connection mechanism by the doctor during the implantation operation, and the fact that the opening position of the suture ring corresponding to the annular disc has no structural support, the suture ring is prone to deformation at the opening of the annular disc, the gap between the annular disc and the suture ring of the ventricular connection mechanism increases, and the blood pump is prone to blood leakage after being installed on the conventional ventricular connection mechanism.

[0049] In order to improve at least part of the above problems, the present application provides a ventricular connection mechanism and a ventricular assist system. The stopper is connected with the annular disc, and the position of the stopper corresponds to the position of the first opening, so that the stopper and the annular disc form a closed ring structure together. The ring structure is provided with a fixing structure capable of fixing and connecting the ring structure and the suture ring. The fixing structure is arranged around the inner hole of the suture ring, so that the ring structure can support the suture ring around the inner hole of the suture ring, thereby enhancing the stability of the overall structure of the suture ring, reducing the problem of increased gap between the suture ring and the annular disc caused by deformation of the suture ring during the process of suturing the suture ring to the heart, and reducing the probability of blood leakage from the opening of the annular disc and the gap between the suture ring and the annular disc. The ventricular connection mechanism and the ventricular assist system provided by the present application are described in detail below in combination with specific embodiments and the accompanying drawings.

[0050] Referring to Figures 1 to 3 An embodiment of the present application provides a ventricular connection mechanism 1 for fixing and installing a ventricular assist device on a heart. Specifically, an embodiment of the ventricular connection mechanism 1 includes a suture ring 10, a clamping assembly 20, and a stopper 50.

[0051] The suture ring 10 is used to be fixed on the heart. In some embodiments, the suture ring 10 is sutured to the heart by a suture. Further, the suture ring 10 is an annular structure having an inner hole, and the inner hole of the suture ring 10 is used for the inlet pipe of the ventricular assist device to pass through.

[0052] The suture ring 10 is generally a flat ring structure. The suture ring 10 comprises opposite first and second suture surfaces 11 and 12, wherein the first suture surface 11 is capable of being connected to the heart, and the second suture surface 12 is used to be connected to the annular disc 30 and the stopper 50.

[0053] In the embodiment, the material of the suture ring 10 is a flexible material, which is beneficial to better fit the suture ring 10 to the outer wall of the heart and increase the connection strength between the ventricular connection mechanism 1 and the outer wall of the heart. Specifically, the suture ring 10 can comprise a silica gel member and a suture cloth wrapped around the silica gel member, that is, the first and second suture surfaces 11 and 12 can be opposite surfaces of the suture cloth, wherein the silica gel member has good biocompatibility and is easy to pass through the suture line, thereby facilitating the suture of the suture ring 10 to the heart. In other embodiments, the silica gel member in the suture ring 10 can also be replaced by TPE (Thermoplastic elastomer), soft PVC (Polyvinyl chloride), etc.

[0054] Continuing to refer to Figure 3 and Figure 4 , the clamping assembly 20 comprises an annular disc 30 and a clamping ring 22, the annular disc 30 is fixedly connected to the second suture surface 12 of the suture ring 10, and the annular disc 30 has a first opening 363. The annular disc 30 also has a first end 361 and a second end 362, which are oppositely arranged along the circumference of the annular disc 30, and the first opening 363 is formed between the first end 361 and the second end 362. The annular disc 30 is a hard structure, and its material can be stainless steel, titanium alloy, etc.

[0055] The clamping ring 22 is fixedly connected to the annular disc 30, specifically, the clamping ring 22 is arranged at the inner periphery of the annular disc 30, and the clamping ring 22 has a second opening 21, the size of the second opening 21 is adjustable, so as to adjust the inner diameter of the clamping ring 22 through the size of the second opening 21, so that the clamping ring 22 has a certain elastic deformation capacity, that is, the clamping ring 22 can be inwardly retracted or expanded along its radial direction to adjust its own inner diameter, and the inlet pipe (not shown) of the ventricular assist device can be arranged in the clamping ring 22. The second opening 21 can be one part of the first opening 363.

[0056] The clamping assembly 20 further comprises 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 extends outwardly from the first opening 363, and the second connecting arm 24 is connected to the other end of the clamping ring 22 and connected to the second end 362, the first connecting arm 23 and the second connecting arm 24 form the second opening 21 therebetween, and the first connecting arm 23 can be selectively close 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.

[0057] The stopper 50 is fixedly connected to the second sewing surface 12 of the sewing ring 10. The stopper 50 is connected with the annular disc 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 disc 30 jointly form a closed annular structure 100, and the annular structure 100 is provided with a fixing structure 200 capable of fixedly connecting the annular structure 100 and the sewing ring 10, and the fixing structure 200 is arranged around the inner hole of the sewing ring 10. In the embodiment, the fixing structure 200 is a sewing hole arranged on the annular structure 100 for the sewing line to pass through, and the sewing line passes through the sewing hole to realize the fixed connection between the annular structure 100 and the sewing ring 10, that is, the annular disc 30 and the stopper 50 can be connected with the sewing ring 10 through the sewing line. In other embodiments, the fixing structure 200 can also be an adhesive arranged between the annular structure 100 and the sewing ring 10, that is, the annular structure 100 is adhered with the sewing ring 10 through the adhesive. In an embodiment, the fixing structure 200 can also be an adhesive arranged between the annular structure 100 and the sewing ring 10, that is, the annular disc 30 and the stopper 50 can also be adhered with the sewing ring 10 through the adhesive.

[0058] 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 opposite to the sewing ring through the first opening 363, and the stopper 50 does not block the movement of the first connecting arm 23, so that the first connecting arm 23 can move circumferentially in the first opening 363 to adjust the inner diameter of the clamping ring 22 to clamp the inlet pipe of the ventricular assist device.

[0059] The stopper 50 includes opposite first and second connecting ends 541 and 551, the first connecting end 541 is connected with the first end 361 of the annular disc 30, and the second connecting end 551 is connected with the second end 362 of the annular disc 30 to fill the first opening 363 on the annular disc 30, so that the annular disc 30 and the stopper 50 jointly form a closed annular structure 100.

[0060] The ventricular connection mechanism 1 can adjust the inner diameter of the clamping ring 22 by the size of the second opening 21, so that the clamping ring 22 can clamp the inlet pipe of the ventricular assist device. The stopper 50 is connected with the annular disc 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 disc 30 jointly form a closed annular structure 100, and the annular structure 100 is provided with a fixing structure 200 capable of fixing the annular structure 100 and the suture ring 10. The fixing structure 200 is arranged around the inner hole of the suture ring 10, so that the annular structure 100 can support the suture ring 10 around the inner hole of the suture ring 10, thereby enhancing the structural stability of the suture ring 10, thereby reducing the problem of increasing the gap between the suture ring 10 and the annular disc 30 caused by the deformation of the suture ring 10 during the process of suturing the suture ring 10 to the heart, and reducing the probability of blood leakage from the first opening 363 of the annular disc 30 and the gap between the suture ring 10 and the annular disc 30.

[0061] Referring to Figure 2 and Figure 3 In an embodiment, the ventricular connection mechanism 1 further comprises a locking assembly 40. The locking assembly 40 is connected with the clamping assembly 20, specifically, the locking assembly 40 is connected with the first connecting arm 23 and the second connecting arm 24. The locking assembly 40 has a locking state and a loosening state. When the locking assembly 40 is in the locking state, the locking assembly 40 can drive the clamping ring 22 of the clamping assembly 20 to radially contract, so that the clamping ring 22 clamps the inlet pipe arranged therein; when the locking assembly 40 is in the loosening state, the clamping ring 22 is released from the state of contraction, and the clamping ring 22 expands radially under the action of its own elasticity, so as to release the inlet pipe.

[0062] Specifically, when implanting the ventricular assist device, first, the suture ring 10 is sutured to the heart, then the inlet pipe of the ventricular assist device is inserted into the suture ring 10 and the clamping ring 22, and finally the locking assembly 40 drives the clamping ring 22 to radially contract, so that the clamping ring 22 clamps the inlet pipe of the ventricular assist device, thereby achieving the fixation and installation of the ventricular assist device on the heart.

[0063] Referring to Figure 3 and Figure 4The annular disc 30 surrounds and connects the clamping ring 22. Specifically, the annular disc 30 comprises a first half ring 31 and a second half ring 32 connected together, a first end 361 is located at the end of the first half ring 31, and a second end 362 is located at the end of the second half ring 32. Further, the first half ring 31 is arranged separately from the clamping ring 22, and the second half ring 32 is fixedly connected to the clamping ring 22. In this way, the elastic deformation capability of the clamping ring 22 is ensured, and the clamping ring 22 cannot be retracted after the stopper 50 connects the first end 361 and the second end 362 of the annular disc 30. When it is necessary to loosen the first opening 363, the clamping ring 22 is retracted by releasing the clamping of the locking assembly 40 and the second connecting arm 24, so that the locking assembly 40 is in a loosened state, and the clamping ring 22 is expanded radially under the elastic force of the clamping ring 22 to loosen the inlet pipe.

[0064] The annular disc 30 comprises a disc body 311 and a boss 321 arranged on the disc body 311. The boss 321 is arranged on the inner circle of the disc body 311, the inner circumferential surface of the boss 321 and the inner circumferential surface of the disc body 311 form the same circumferential surface, and the boss 321 can contact the suture ring 10. The disc body 311 is spaced apart from the suture ring 10, and the disc body 311 can contact the housing of the ventricular assist device. Part of the boss 321 and the disc body 311 are arranged on the first half ring 31, and the other part of the boss 321 and the disc body 311 are arranged on the second half ring 32.

[0065] The locking assembly 40 is connected to the first connecting arm 23 and the second connecting arm 24, and the locking assembly 40 can drive the first connecting arm 23 and the second connecting arm 24 to approach each other, so that the clamping ring 22 is retracted along the radial direction, and the clamping ring 22 clamps the inlet pipe of the ventricular assist device.

[0066] Referring to Figure 3In an embodiment, the locking assembly 40 comprises a base 41 connected with the first connecting arm 23 and a locking piece 42, one end of which is rotationally connected with the base 41, and the other end of which is provided with an engaging portion 421 for cooperating 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 cooperate with the curved surface 241. Specifically, when the locking piece 42 is driven to rotate relative to the base 41, the engaging portion 421 contacts the curved surface 241 of the second connecting arm 24 and pushes the first connecting arm 23 to move towards the second connecting arm 24, so as to make the clamping ring 22 radially shrink. When the clamping ring 22 is shrunk to the entrance pipe, the engaging portion 421 is engaged with the second connecting arm 24 to maintain the clamping ring 22 in the shrunk state, and at this time, the locking assembly 40 is in the locked state. When it is needed to loosen the first opening 363, the engaging portion 421 is disengaged from the second connecting arm 24, so that the locking assembly 40 is in the loosened state, and the clamping ring 22 is released from the shrunk state, and expands radially under the elastic force of the clamping ring 22, so as to loosen the entrance pipe. It can be understood that there are many ways to drive the first connecting arm 23 and the second connecting arm 24 to move towards or away from each other, which are not limited to the above embodiment, and will not be described here.

[0067] In the embodiment, the stopper 50 is fixedly connected with the suture ring 10 and the annular disc 30. In the embodiment, the stopper 50 is welded with the annular disc 30. It can be understood that in other embodiments, the stopper 50 can be connected with the annular disc 30 by using an adhesive or the like. In the embodiment, the stopper 50 and the annular disc 30 are both hard structures, which are beneficial to support the suture ring 10 and reduce the deformation of the suture ring 10 during suturing. For example, the materials of the stopper 50 and the annular disc 30 can both be titanium alloy or stainless steel or the like. Preferably, the materials of the stopper 50 and the annular disc 30 can be the same, which facilitates the welding of the stopper 50 and the annular disc 30 together, and avoids the problem of difficulty in welding different materials.

[0068] Referring to Figure 5 and Figure 6 Optionally, in an embodiment, the stopper 50 and the annular disc 30 are both provided in the shape of a circular arc, and the central axis of the circle corresponding to the circular arc of the stopper 50 is coaxial with the central axis of the circle corresponding to the annular disc 30. In this way, the shapes of the stopper 50 and the annular disc 30 are more matched. 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 disc 30, the stopper 50 and the annular disc 30 can form a complete circular ring structure from the perspective of the ventricular connection mechanism 1, so that the overall appearance of the ventricular connection mechanism 1 is more consistent.

[0069] Referring to Figure 4Optionally, in an embodiment, the fixing structure 200 comprises a plurality of first suture holes 33 and a plurality of second suture holes 53. The plurality of first suture holes 33 are arranged on the annular disc 30, and the annular disc 30 is sutured to the suture ring 10 through the first suture holes 33. The first end 361 and the second end 362 of the annular disc 30 are each provided with a first suture hole 33. Specifically, the first suture hole 33 is used for threading a suture line, so as to facilitate the suture connection of the annular disc 30 and the suture ring 10. The plurality of second suture holes 53 are arranged on the stopper 50, and the stopper 50 is sutured to the suture ring 10 through the plurality of second suture holes 53. The first connecting end 541 and the second connecting end 551 are each provided with a second suture hole 53. Specifically, the second suture hole 53 is used for threading a suture line, so as to facilitate the suture connection of the stopper 50 and the suture ring 10. For the purpose of description, the first suture hole at the first end 361 and the second end 362 is defined as the first suture hole 33a, and the other first suture holes are defined as the first suture hole 33b. The second suture hole at the first connecting end 541 and the second connecting end 551 is defined as the second suture hole 53a, and the second suture hole at the first opening is defined as the second suture hole 53b.

[0070] Further, 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. In this way, the first suture hole 33a at the first end 361 and the second end 362 is avoided from being blocked by the stopper 50, and the second suture hole 53a at the first connecting end 541 and the second connecting end 551 is avoided from being blocked by the annular disc 30, thereby facilitating the suture connection of the annular disc 30 and the stopper 50 to the suture ring 10. Moreover, it is avoided to additionally open the first suture hole 33 on the annular disc 30 to connect the stopper 50 to the suture ring 10 through the first suture hole 33a, thereby reducing the connection difficulty of the stopper 50 and the suture ring 10.

[0071] In the present embodiment, when the first connecting arm 23 approaches the second connecting arm 24, at least one second suture hole 53b can be exposed from the first opening 363, and the first connecting arm 23 is avoided from blocking the at least one second suture hole 53b, thereby facilitating the suture connection of the stopper 50 to the suture ring 10 through the second suture hole 53 when the locking assembly 40 is in the locked state. It should be noted that the first connecting arm 23 will not block other second suture holes 53 during the movement of approaching the second connecting arm 24.

[0072] 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.

[0073] Referring to Figure 2 Further, the annular disc 30 is further provided with a plurality of first grooves 34 capable of accommodating the suture, and a first suture hole 33 is arranged between two adjacent first grooves 34, and the first grooves 34 are communicated with two adjacent first suture holes 33. In this way, the suture extending from the first suture hole 33 can be passed into the next first suture hole 33 along the first groove 34, so as to avoid the suture protruding from the surface of the annular disc 30 and affecting the installation of the ventricular assist device.

[0074] Referring to Figure 6 In one embodiment, the stopper 50 is further provided with a plurality of second grooves 58 capable of accommodating the suture, and a second suture hole 53 is arranged between two adjacent second grooves 58, and the second grooves 58 are communicated with two adjacent second suture holes 53. In this way, the suture extending from the second suture hole 53 can be passed into the next second suture hole 53 along the second groove 58, so as to avoid the suture protruding from the stopper 50 after suturing and contacting the first connecting arm 23, and avoid affecting the movement of the first connecting arm 23.

[0075] In an embodiment, the first plurality of grooves 34 and the first plurality of suture holes 33 are arranged on a first circle C1, the second plurality of grooves 58 and the second plurality of 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 on which the ring 30 is located are located on the same straight line, and the radius of the first circle C1 is equal to the radius of the second circle C2, so that the suture thread can smoothly pass through the junction of the ring 30 and the stopper 50 via the first grooves 34 and the second grooves 58, avoiding the situation that the suture thread is located outside the first grooves 34 and the second grooves 58 due to the difference between the radius of the first circle C1 and the radius of the second circle C2, and avoiding affecting the installation of the ventricular assist device. In addition, the center of the first circle C1, the center of the second circle C2 and the center of the circle on which the ring 30 is located are located on the same straight line, and the radius of the first circle C1 is equal to the radius of the second circle C2, without the mutation of the radius, so that the suture operation of suturing the ring 30 and the stopper 50 to the suture ring 10 is more smooth, simplifying the suture operation, and also enabling the suture thread accommodated in the first grooves 34 and the second grooves 58 to form a circle along the top view angle of the ventricular connecting mechanism 1, improving the appearance consistency of the ventricular connecting mechanism 1. In the embodiment, the width of the first grooves 34 and the second grooves 58 is equal. In other embodiments, the width of the first grooves 34 and the second grooves 58 can also be unequal.

[0076] Referring to Figure 7 Optionally, in an embodiment, the first end 361 has a first end face 3611, and the second end 362 has a second end face 3621, the first end face 3611 is opposite and spaced apart from the second end face 3621 to form a first opening 363. At least one of the first end face 3611 and the second end face 3621 is tangent to the edge of the second suture hole 53b located at the first opening 363.

[0077] Further, referring to Figure 8 , the second end face 3621 is tangent to the edge of the second suture hole 53b located at the first opening 363, wherein the second suture hole 53b refers to the second suture hole 53 closest to the second end face 3621 among all the second suture holes 53 between the first end face 3611 and the second end face 3621. In this way, the suture thread extending out of the first suture hole 33a of the second end 362 can enter the second suture hole 53b along the second end face 3621, or the suture thread extending out of the second suture hole 53b can enter the first suture hole 33a of the second end 362 along the second end face 3621, reducing the probability of the suture thread touching other structures, and the second end face 3621 can support the suture thread, thereby reducing the probability of the suture thread being cut.

[0078] In an embodiment, the first end surface 3611 can also be tangent to the edge of the second suture hole 53b at the first opening 363, so that the suture extending from 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 contacting other structures, and the first end surface 3611 can support the suture, thereby reducing the probability of the suture being cut. In another embodiment, the first end surface 3611 and the second end surface 3621 can both be tangent to the edge of the second suture hole 53b at the first opening 363.

[0079] Referring to Figure 2 and Figure 3 In an embodiment, the annular disc 30 has a first surface 351 and a second surface 352 arranged oppositely, and the first surface 351 is connected to the second suture surface 12 of the suture ring 10. The stopper 50 has a first connecting surface 51 and a second connecting surface 52 arranged oppositely, wherein the first connecting surface 51 is arranged on the boss 321 and connected to the second suture surface 12 of the suture ring 1, and the second connecting surface 52 is arranged on the disc body 311 and can be in contact with the housing of the ventricular assist device. Further, the first connecting surface 51 is coplanar with the first surface 351, so as to ensure that the joint of the stopper 50 and the annular disc 30 can be sealingly fitted with the suture ring 10, avoiding the occurrence of gaps between the joint of the stopper 50 and the annular disc 30 and the suture ring 10, and further reducing the probability of blood leakage.

[0080] Referring to Figure 4 Optionally, in an embodiment, the first end 361 is provided with a first accommodating groove 371, and the second end 362 is provided with a second accommodating groove 372. The first accommodating groove 371 and the second accommodating groove 372 are both exposed on the first surface 351, i.e., the first accommodating groove 371 penetrates the first end surface 3611, and the second accommodating groove 372 penetrates the second end surface 3621. The first connecting end 541 of the stopper 50 is arranged in the first accommodating groove 371, and the second connecting end 551 of the stopper 50 is arranged in the second accommodating groove 372, so as to ensure that the first connecting surface 51 of the stopper 50 is coplanar with the first surface 351 of the annular disc 30, while also improving the connecting strength of the stopper 50 and the annular disc 30.

[0081] In combination with Figure 5Further, the stopper 50 further has a first connecting side surface 54, a second connecting side surface 55 and a first connecting end surface 5412, the first connecting end surface 5412 is arranged at the first connecting end 541, the first connecting end surface 5412 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 with the first connecting surface 51. 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, the first connecting end 541 is provided with a fillet 57 at the connecting position between the first connecting surface 51 and the first connecting side surface 54. By arranging the fillet 57 at the first connecting end 541, the sharp edge of the first connecting end 541 is avoided, which prevents the operator from being cut when the stopper 50 is sewn to the sewing ring 10.

[0082] Further, the first connecting end surface 5412 is in contact with the groove wall of the first accommodating groove 371, the first connecting side surface 54 and the second connecting side surface 55 are exposed outside the first accommodating groove 371, that is, the first accommodating groove 371 is an open groove, which can tolerate the appropriate dimensional error of the stopper 50. Therefore, when the second connecting end 551 has been arranged in the second accommodating 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 accommodating groove 371, so that the stopper 50 can be fixedly connected with the annular disc 30. The situation that the first connecting end 541 cannot be accommodated in the first accommodating groove 371 due to the deformation of the annular disc 30 or the excessive width of the first connecting end 541 is avoided.

[0083] The stopper 50 further has a second connecting end surface 5512 arranged at the second connecting end 551, the first connecting side surface 54, the second connecting side surface 55 and the second connecting end surface 5512 are in contact with the groove wall of the second accommodating groove 372, so that the second connecting end 551 can be fitted and accommodated in the second accommodating groove 372, that is, the shape of the second connecting end 551 is the same as that of the second accommodating groove 372, and the size of the second connecting end 551 is also the same as that of the second accommodating groove 372, so that the second connecting end 551 can exactly fill the second accommodating groove 372, so as to avoid the thrombus caused by the stagnation of blood.

[0084] Further, the first connecting surface 51 at the second connecting end 551 is directly connected with the first connecting side surface 54 and the second connecting side surface 55, that is, the first connecting surface 51 at the second connecting end 551 is not provided with a rounding 57 at the connection with the first connecting side surface 54 and the second connecting side surface 55, so that the surface at the joint of the second connecting end 551 and the second end 362 is seamlessly connected, which further facilitates the sealing fit of the joint of the stopper 50 and the annular disc 30 with the suture ring 10, thereby further reducing the risk of blood leakage.

[0085] In other embodiments, the first end 361 can not be provided with the first accommodating groove 371, and the second end 362 can not be provided with the second accommodating groove 372. The first connecting end surface 5412 of the stopper 50 can be directly fixedly connected with the first end surface 3611, and the second connecting end surface 5512 can be directly fixedly connected with the second end surface 3621, so that the fixed connection of the stopper 50 and the annular disc 30 can also be achieved.

[0086] Referring to Figure 3 Optionally, in an embodiment, the first connecting arm 23 is provided with an avoiding groove 231 on the side close to the stopper 50 to be spaced apart from the stopper 50. Specifically, the avoiding groove 231 penetrates through opposite sides of the first connecting arm 23 along the circumferential direction of the annular disc 30, and the stopper 50 and the groove bottom surface of the avoiding groove 231 have a gap therebetween. By providing the avoiding groove 231 on the side of the first connecting arm 23 close to the stopper 50, the first connecting arm 23 can avoid the stopper 50, thereby reducing the probability of contact between the first connecting arm 23 and the stopper 50 during movement of the first connecting arm 23, and improving the smoothness of operation of the ventricular connecting mechanism 1.

[0087] Further, referring to Figure 9 and Figure 10 , the second connecting surface 52 of the stopper 50 is arranged opposite and parallel to the groove bottom surface of the avoiding groove 231, and the distance d between the second connecting surface 52 and the groove bottom surface of the avoiding groove 231 and the thickness t of the stopper 50 satisfy: 0.3≤d / t≤0.7, wherein the thickness t of the stopper 50 refers to the distance between the first connecting surface 51 and the second connecting surface 52 when the first connecting surface 51 and the second connecting surface 52 are parallel to each other. In this way, on the basis of ensuring the strength of the stopper 50, the stopper 50 and the groove bottom surface of the avoiding groove 231 have sufficient spacing therebetween, so as to avoid contact between the first connecting arm 23 and the stopper 50. When d / t is less than 0.3, on the basis of the thickness t of the stopper 50 being unchanged, the distance d between the second connecting surface 52 and the groove bottom surface of the avoiding groove 231 is smaller, and the first connecting arm 23 may be contacted with the stopper 50 during movement of the first connecting arm 23. When d / t is greater than 0.7, the stopper 50 is thinner, and it is difficult to ensure the strength of the stopper 50.

[0088] The application also provides a ventricular assist system, which comprises a ventricular assist device (not shown) and the ventricular connecting mechanism 1 of any of the above embodiments. The ventricular assist device comprises an inlet tube, which is arranged in the clamping ring 22. The locking assembly 40 is connected with the first connecting arm 22 and the second connecting arm 23. Thus, when the clamping ring 22 is driven to shrink by the locking assembly 40, the clamping ring 22 can clamp the inlet tube in the circumferential direction, so that the ventricular assist device can be fixedly installed on the heart tissue.

[0089] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0090] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for ordinary skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A ventricular connection mechanism, characterized by, The suture ring comprises: a clamping assembly, which comprises a ring-shaped disc and a clamping ring, the ring-shaped disc has a first opening, the ring-shaped disc has a first end and a second end, the first end and the second end are oppositely arranged along the circumference of the ring-shaped disc, the first opening is formed between the first end and the second end, the clamping ring is fixedly connected with the ring-shaped disc, the clamping ring has a second opening, the size of the second opening is adjustable, so as to adjust the inner diameter of the clamping ring by adjusting the size of the second opening; the clamping assembly further comprises a first connecting arm and a second connecting arm, the clamping ring is arranged on the inner periphery of the ring-shaped disc, the first connecting arm is connected to one end of the clamping ring and extends outward from the first opening, the second connecting arm is connected to the other end of the clamping ring and is connected with the second end, the first connecting arm can be selectively close to or away from the second connecting arm, so as to adjust the size of the second opening; and a stopper, which is connected with the ring-shaped disc, and the position of the stopper corresponds to the position of the first opening, so that the stopper and the ring-shaped disc jointly form a closed ring-shaped structure, the ring-shaped structure is provided with a fixing structure, the fixing structure can fixedly connect the ring-shaped structure with the suture ring, and the fixing structure is arranged around the inner hole of the suture ring; the stopper is located between the suture ring and the first connecting arm, so that the first connecting arm can extend outward from the side of the stopper which is opposite to the suture ring through the first opening. The fixing structure comprises a plurality of first suture holes and a plurality of second suture holes, the plurality of first suture holes are arranged on the ring-shaped disc, the ring-shaped disc is sutured with the suture ring through the plurality of first suture holes, the plurality of second suture holes are arranged on the stopper, and the stopper is sutured with the suture ring through the plurality of second suture holes; the ring-shaped 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, and at least one of the first end face and the second end face is tangent to the edge of the second suture hole located at the first opening. The stopper and the ring-shaped disc are both arranged in the shape of a circular arc, and the central axis of the circle corresponding to the circular arc of the stopper is coaxial with the central axis of the circle where the ring-shaped disc is located. The ring-shaped disc is further provided with a plurality of first grooves capable of accommodating suture lines, one first suture hole is arranged between adjacent two first grooves, and the first grooves are connected with adjacent two first suture holes; the stopper is further provided with a plurality of second grooves capable of accommodating suture lines, one second suture hole is arranged between adjacent two second grooves, and the second grooves are connected with adjacent two second suture holes.

2. The ventricular connection mechanism of claim 1, wherein, The plurality of first grooves and the plurality of first suture holes are arranged on a first circle; the plurality of second grooves and the plurality of second suture holes are arranged on a second circle, the center of the first circle, the center of the second circle and the center of the circle where the ring-shaped disc is located are located on the same straight line, and the radii of the first circle and the second circle are equal.

3. The ventricular connection mechanism of claim 1, wherein, ​ 4. The ventricular connection mechanism of claim 3, wherein, ​ 5. The ventricular connection mechanism of claim 1, wherein, The first end and the second end are each provided with a first suture hole, the stopper comprises opposite first and second connecting ends, the first and second connecting ends are each provided with a second suture hole, wherein: The first suture hole of the first end is coaxial with the second suture hole of the first connecting end; and / or, the first suture hole of the second end is coaxial with the second suture hole of the second connecting end.

6. The ventricular connection mechanism of claim 1, wherein, The annular disc has a first surface connected with the suture ring; the stopper has a first connecting surface connected with the suture ring, the first connecting surface is coplanar with the first surface.

7. The ventricular connection mechanism of claim 6, wherein, The first end is provided with a first accommodating groove, the second end is provided with a second accommodating groove, the first and second accommodating grooves are exposed on the first surface, the stopper comprises opposite first and second connecting ends, the first connecting end is arranged in the first accommodating groove, and the second connecting end is arranged in the second accommodating groove.

8. The ventricular connection mechanism of claim 7, wherein, The stopper further has a first connecting side surface, a second connecting side surface and a first connecting end surface arranged at the first connecting end, the first connecting end surface is connected between the first connecting side surface and the second connecting side surface, the first connecting side surface, the second connecting side surface and the first connecting end surface are connected with the first connecting surface, the first connecting end surface is in contact with the groove wall of the first accommodating groove, and the first connecting side surface and the second connecting side surface are exposed outside the first accommodating groove.

9. The ventricular connection mechanism of claim 8, wherein, The stopper further has a second connecting end surface arranged at the second connecting end, and the first connecting side surface, the second connecting side surface and the second connecting end surface are in contact with the groove wall of the second accommodating groove.

10. The ventricular connection mechanism of claim 1, wherein, The first connecting arm is provided with an avoiding groove on one side close to the stopper to be spaced apart from the stopper.

11. The ventricular connection mechanism of claim 10, wherein, The stopper has opposite first and second connecting surfaces, the first connecting surface is closer to the suture ring than the second connecting surface, the second connecting surface is opposite and parallel to the groove bottom surface of the avoiding groove, and the distance d between the second connecting surface and the groove bottom surface of the avoiding groove and the thickness t of the stopper satisfy: 0.3≤d / t≤0.

7.

12. The ventricular connection mechanism of claim 10, wherein, The fixing structure comprises a plurality of second suture holes arranged on the stopper, and at least one second suture hole can be exposed from the first opening when the first connecting arm is close to the second connecting arm.

13. The ventricular connection mechanism of any of claims 1-12, wherein, The material of the suture ring is a flexible material.

14. A ventricular assist system, characterized by The ventricular assist system comprises a ventricular assist device and the ventricular connecting mechanism according to any one of claims 1-13, and the ventricular assist device has an inlet pipe, and the inlet pipe is arranged in the clamping ring.

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