Ventricular connecting assembly and ventricular auxiliary device

Abstract

The utility model provides a ventricle connecting assembly and a ventricle auxiliary device. The ventricle auxiliary device comprises a blood pump mechanism and the ventricle connecting assembly. The ventricle connecting assembly comprises a clamping assembly and a locking piece; the clamping assembly comprises a split ring, a first connecting piece and a second connecting piece. And the locking piece is rotationally connected with the first connecting piece. A limiting surface is arranged on the locking piece, and an inclined surface is arranged at the end part of the second connecting piece; when the locking piece rotates in the first direction, the limiting face moves along the inclined face of the second connecting piece, the first connecting piece is promoted to move in the direction close to the second connecting piece, and therefore the inner diameter of the split ring is reduced. The locking piece can be clamped with the second connecting piece when moving in the first direction, so that the split ring is in a clamping state. An inflow tube of the blood pump mechanism can be inserted into the split ring, and the split ring can clamp the inflow tube in a clamped state. The ventricle connecting assembly is few in part number and reliable in assembly, the overall size of the device can be reduced, and harm to a patient is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a ventricular connection assembly and a ventricular assist device. Background Art

[0002] A ventricular assist device can assist the heart in pumping blood and improve the heart function of a patient, and is a treatment option for heart failure patients. The ventricular assist device involved in the present invention is a magnetic levitation centrifugal blood pump, and the blood pump needs to be installed at the apex position of the ventricle. In the prior art, a connection assembly is usually used to fixedly install and connect the blood pump at the apex position of the ventricle, but the structure of the connection assembly is complex, and the overall height of the entire connection assembly is relatively high, thus occupying a relatively large space in the human body. In line with the requirement that the volume of a medical device is as small as possible, how to design a blood pump ventricular connection assembly with a simple structure and convenient operation is a technical problem that needs to be solved urgently at present. Content of the Utility Model

[0003] The purpose of the utility model is to provide a ventricular connection assembly and a ventricular assist device. The ventricular connection assembly has fewer parts, reliable assembly, can reduce the overall size of the ventricular assist device, and reduce the harm to the patient.

[0004] To achieve the above purpose, the utility model provides a ventricular connection assembly, which includes a clamping assembly and a locking member; the clamping assembly includes an open ring, a first connecting member and a second connecting member; the open ring has a first end and a second end, the first end and the second end are arranged at intervals, the first connecting member is connected to the first end, and the second connecting member is connected to the second end; the locking member is rotatably connected to the first connecting member;

[0005] A limiting surface is arranged on the locking member; a bevel surface is arranged at the end of the second connecting member; when the locking member rotates in the first direction, the limiting surface moves along the bevel surface of the second connecting member, prompting the first connecting member to move towards the direction close to the second connecting member, so as to reduce the inner diameter of the open ring;

[0006] A protrusion is arranged on the limiting surface; a receiving groove is arranged on the bevel surface or at the end of the bevel surface; when the locking member rotates relative to the first connecting member in the first direction, the protrusion can enter the receiving groove, so that the locking member and the second connecting member are engaged with each other;

[0007] The open ring has a clamping state and a non-clamping state; the locking member can be engaged with the second connecting member when moving in the first direction, so that the open ring is in the clamping state; the locking member can also be disengaged from the second connecting member when moving in the second direction, so that the open ring is in the non-clamping state; the first direction and the second direction are opposite.

[0008] Optionally, the clamping assembly further includes a fixing ring and a clamping structure. The opening ring is disposed in the inner ring of the fixing ring. The fixing ring has an opening, and the opening position of the opening ring corresponds to the opening position of the fixing ring. The outer ring surface of the opening ring near the second end is fixedly connected to the inner ring surface of the fixing ring, and the outer ring surface of the opening ring near the first end is separated from the inner ring surface of the fixing ring. The clamping structure is fixed to one side of the fixing ring and together with the fixing ring encloses a sunk groove.

[0009] Optionally, the end of the locking member is provided with a cam structure. When the locking member rotates in the second direction, the cam structure can be urged to contact the second connecting member. The cam structure is used to urge the first connecting member to move away from the second connecting member under the drive of the locking member to expand the inner diameter of the opening ring.

[0010] Optionally, the clamping structure is provided with a convex portion, and the cam structure is provided with a groove matching the convex portion. When the locking member rotates in the second direction, the convex portion can enter the groove so that the locking member is in a locked position.

[0011] Optionally, a straight line perpendicular to the bottom wall of the groove is set as a first preset auxiliary line. The locking member is hinged to the first connecting member to form a connection point. The connection point is disposed on the side of the first preset auxiliary line close to the first connecting member.

[0012] The cam structure is further provided with a stop portion. When the convex portion enters the groove, the stop portion is used to abut against the side of the first connecting member away from the second connecting member to prevent the locking member from continuing to rotate in the second direction.

[0013] Optionally, one of a convex bump and a depression is disposed on the side of the first connecting member facing the second connecting member, and the other of the convex bump and the depression is disposed on the side of the second connecting member facing the first connecting member. When the opening ring is in a clamping state, at least part of the convex bump is placed in the depression and abuts against the depression.

[0014] Optionally, the ventricular connection assembly further includes a pressing ring and a felt. The pressing ring is used to enter the sunk groove and is detachably connected to the clamping structure. The felt is placed between the pressing ring and the clamping structure. After the pressing ring and the clamping structure are connected, they can clamp and fix the felt.

[0015] The engaging structure is circumferentially provided with at least two first protruding segments; the pressing ring is circumferentially provided with at least two second protruding segments; the first protruding segments and the second protruding segments correspond one by one, and one first protruding segment abuts against one second protruding segment to realize the extrusion fixation of the engaging structure, the pressing ring and the felt.

[0016] Optionally, a connecting portion is provided at an end of the locking member away from the first connecting member, and the connecting portion is used for connecting with an external component to drive the locking member to rotate through the external component.

[0017] To achieve the above object, the present utility model further provides a ventricular assist device, including a blood pump mechanism and any one of the ventricular connection assemblies. The blood pump mechanism includes an inflow tube and a pump body connected to each other. The inflow tube can be inserted into the opening ring, and the opening ring can clamp the inflow tube in the clamping state.

[0018] Optionally, an annular groove is provided at an end of the inflow tube close to the upper cover of the pump body, and the opening ring is used for clamping and fixing in the annular groove.

[0019] Optionally, the clamping assembly further includes a fixing ring with an opening. The opening ring is arranged in the inner ring of the fixing ring, and the opening position of the opening ring corresponds to the opening position of the fixing ring; the outer ring surface of the opening ring close to the second end is fixedly connected to the inner ring surface of the fixing ring, and the outer ring surface of the opening ring close to the first end is separated from the inner ring surface of the fixing ring;

[0020] At least one spherical convex portion is provided on the fixing ring and / or the opening ring. A plurality of continuous spherical grooves matching the spherical convex portion are provided on the side of the upper cover of the pump body facing the opening ring. The plurality of spherical grooves are arranged in sequence along the circumference of the inflow tube; the spherical convex portion is used for being received and limited in a corresponding spherical groove to limit the relative rotation between the pump body and the opening ring.

[0021] In the ventricular connection assembly and the ventricular assist device provided by the present utility model, the ventricular connection assembly can realize the clamping and fixing operation of the clamping assembly on the inflow tube only by rotating the locking member, and then fix the blood pump mechanism on a predetermined chamber. The ventricular connection assembly has fewer parts, a simple structure, reliable assembly, convenient operation, can also reduce the overall size of the ventricular assist device, and further can reduce the drag of the ventricular connection assembly on myocardial tissue, simplify the surgical procedure, reduce the surgical cost, and reduce the harm brought to the patient by the surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the ventricular connection assembly in a first viewing angle in a preferred embodiment of the present utility model, wherein the opening ring is in a clamping state;

[0023] Figure 2 This is a schematic structural diagram of the central chamber connection assembly in a preferred embodiment of the present utility model under a second viewing angle, wherein the opening ring is in a clamped state;

[0024] Figure 3 This is a three-dimensional structural diagram of the clamping assembly in a preferred embodiment of the present utility model under a first viewing angle;

[0025] Figure 4 This is a top view structural diagram of the clamping assembly in a preferred embodiment of the present utility model;

[0026] Figure 5 This is an axial sectional structural diagram of the clamping assembly in a preferred embodiment of the present utility model, wherein the opening ring is in a non-clamped state;

[0027] Figure 6 is Figure 5 a partial enlarged view of;

[0028] Figure 7 This is a three-dimensional structural diagram of the clamping assembly in a preferred embodiment of the present utility model under a second viewing angle;

[0029] Figure 8 This is a structural diagram of the clamping assembly and the blood pump mechanism in a preferred embodiment of the present utility model;

[0030] Figure 9a This is an axial sectional structural diagram of the clamping assembly and the locking member in a preferred embodiment of the present utility model, wherein the opening ring is in a non-clamped state and the locking member is in a locked position;

[0031] Figure 9b This is a top view structural diagram of the clamping assembly and the locking member in a preferred embodiment of the present utility model, wherein the opening ring is in a non-clamped state and the locking member is in a locked position;

[0032] Figure 9c This is a bottom view structural diagram of the clamping assembly and the locking member in a preferred embodiment of the present utility model, wherein the opening ring is in a non-clamped state and the locking member is in a locked position;

[0033] Figure 10a is Figure 9a a partial enlarged view of;

[0034] Figure 10b is Figure 9c a partial enlarged view of;

[0035] Figure 11a This is a top view structural diagram of the clamping assembly and the locking member in a preferred embodiment of the present utility model, wherein the opening ring is in a non-clamped state and the locking member is in a non-locked position;

[0036] Figure 11b This is a schematic bottom view of the clamping assembly and the locking member in a preferred embodiment of the present utility model. Among them, the split ring is in a non-clamping state, and the locking member is in a non-locked position;

[0037] Figure 12a This is a schematic bottom view of the central chamber auxiliary device in a preferred embodiment of the present utility model. Among them, the split ring is in a clamping state;

[0038] Figure 12b This is a schematic top view of the central chamber auxiliary device in a preferred embodiment of the present utility model. Among them, the split ring is in a clamping state;

[0039] Figure 12c This is a schematic axial cross-sectional view of the central chamber auxiliary device in a preferred embodiment of the present utility model. Among them, the split ring is in a clamping state;

[0040] Figure 13a This is a schematic bottom view of the central chamber auxiliary device in a preferred embodiment of the present utility model. Among them, the split ring is in a non-clamping state;

[0041] Figure 13b This is a schematic top view of the central chamber auxiliary device in a preferred embodiment of the present utility model. Among them, the split ring is in a non-clamping state;

[0042] Figure 13c This is a schematic axial cross-sectional view of the central chamber auxiliary device in a preferred embodiment of the present utility model. Among them, the split ring is in a non-clamping state;

[0043] Figure 14a This is a schematic top view of the pressure ring in a preferred embodiment of the present utility model;

[0044] Figure 14b This is a three-dimensional structure schematic diagram of the pressure ring in a preferred embodiment of the present utility model;

[0045] Figure 15 This is a structural schematic diagram of the pressure ring and the clamping assembly in a preferred embodiment of the present utility model;

[0046] Figure 16a This is a three-dimensional structure schematic diagram of the pressure ring, the felt and the clamping assembly in a preferred embodiment of the present utility model;

[0047] Figure 16b This is a schematic side view of the pressure ring, the felt and the clamping assembly in a preferred embodiment of the present utility model;

[0048] Figure 16c This is a schematic side cross-sectional view of the pressure ring, the felt and the clamping assembly in a preferred embodiment of the present utility model.

[0049] In the figure:

[0050] Clamping assembly 1; opening ring 11; first end 111; second end 112; first connecting piece 12; connecting point 121; convex hull 122; second connecting piece 13; inclined surface 131; receiving groove 132; depression 133; fixing ring 14; spherical convex part 141; engaging structure 15; sinking groove 151; convex part 152; first protruding section 153; first depressed section 154;

[0051] Locking piece 2; limiting surface 21; protrusion 211; cam structure 22; groove 221; stopping part 222; rectangular groove 23;

[0052] Blood pump mechanism 3; inflow pipe 31; annular groove 311; pump body 32; upper cover 321; spherical groove 322; pressing ring 4; second protruding section 41; second depressed section 42; first through hole 43; felt 5. Detailed implementation manners

[0053] The following further describes the present utility model in detail with reference to the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present utility model will be clearer. It should be noted that the drawings are all in a very simplified form and use non-precise scales, only for the purpose of facilitating and clearly assisting in explaining the purpose of the embodiments of the present utility model.

[0054] The terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the referred mechanism or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model.

[0055] In the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected, or connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0056] In this text, the term "axial direction" refers to the direction of the central axis of the open ring or the inflow pipe; the term "radial direction" refers to the direction perpendicular to the central axis of the open ring or the inflow pipe; the term "circumferential direction" refers to the direction around the central axis of the open ring or the inflow pipe.

[0057] The following describes the present utility model in detail with reference to the accompanying drawings and preferred embodiments. Without conflict, the following embodiments and the features in the embodiments can be mutually supplemented or combined with each other.

[0058] Referring to Figures 1 - 4 As shown, a preferred embodiment of the present utility model provides a ventricular connection assembly, including a clamping assembly 1 and a locking member 2. The clamping assembly includes an open ring 11, a first connecting member 12, and a second connecting member 13. The open ring 11 has a first end 111 and a second end 112, the first end 111 and the second end 112 are spaced apart, the first connecting member 12 is connected to the first end 111, the second connecting member 13 is connected to the second end 112, and the locking member 2 is rotatably connected (such as hinged) to the first connecting member 12.

[0059] More specifically, the open ring 11 is a circular ring with one end open, and the first end 111 and the second end 112 at the open position of the open ring 11 can move away from or close to each other. By changing the relative positions of the first connecting member 12 and the second connecting member 13, the distance between the first end 111 and the second end 112 is controlled, and thus the inner diameter of the open ring 11 is adjusted.

[0060] Referring to Figure 5 and Figure 6 As shown, a limiting surface 21 is provided on the locking member 2, and an inclined surface 131 is provided at the end of the second connecting member 13. When the locking member 2 rotates in the first direction a, the limiting surface 21 always moves along the inclined surface 131 of the second connecting member 13, dragging the first connecting member 12 to approach the second connecting member 13, thereby reducing the inner diameter of the open ring 11.

[0061] Continuing to refer to Figure 6 , a protrusion 211 is provided on the limiting surface 21, and a receiving groove 132 is provided on or at the end of the inclined surface 131. Figure 6 The receiving groove 132 in

[0062] Referring to Figure 2 , and in combination with Figure 5, the split ring 11 has a clamping state and a non-clamping state. The locking member 2 can engage and fix with the second connecting member 13 when moving along the first direction a, so that the split ring 11 is in the clamping state. The locking member 2 can also be disengaged from the second connecting member 13 when moving along the second direction b, that is, the locking member 2 can be separated from the second connecting member 13 and rotate relative to it, so that the split ring 11 is in the non-clamping state.

[0063] It should be known that the first direction a and the second direction b are opposite. Refer to Figure 5 As shown, in one example, the first direction a is the counterclockwise direction, and the second direction b is the clockwise direction. In another example, the first direction a is the clockwise direction, and the second direction b is the counterclockwise direction.

[0064] Refer to Figure 7 and Figure 8 As shown, a preferred embodiment of the present invention further provides a ventricular assist device, including a blood pump mechanism 3 and a ventricular connection assembly. The blood pump mechanism 3 includes an inlet pipe 31 and a pump body 32 connected to each other. The inlet pipe 31 of the blood pump mechanism 3 can be inserted into the split ring 11, and the split ring 11 can clamp the inlet pipe 31 in the clamping state.

[0065] Specifically, the locking member 2 can rotate along the first direction a until it engages with the second connecting member 13. Before the locking member 2 engages with the second connecting member 13, the split ring 11 is in the non-clamping state, and the inlet pipe 31 and the split ring 11 can move relative to each other. After the locking member 2 engages with the second connecting member 13, the split ring 11 is in the clamping state and can clamp and fix the inlet pipe 31.

[0066] During actual implantation, the ventricular connection assembly is first fixed on the chamber wall of the predetermined chamber, and then the inlet pipe 31 of the blood pump mechanism 3 is inserted into the predetermined chamber. After the inlet pipe 31 is inserted in place, the ventricular connection assembly can clamp and fix the inlet pipe 31, and then fix the pump body 32 on the outer wall of the predetermined chamber. After the blood pump mechanism 3 is fixed, the blood in the predetermined chamber can be continuously sucked into the pump body 32, and the pump body 32 can do work on the blood and transport the blood to the aorta to assist or replace the pumping function of the heart. Generally speaking, the predetermined chamber refers to the left ventricle or right ventricle of the human body, but it does not exclude the possibility that the predetermined chamber is other chambers in the human body.

[0067] In the ventricular connection assembly and ventricular assist device provided by the present utility model, the ventricular connection assembly can realize the clamping and fixing operation of the clamping assembly 1 on the inflow tube 31 only by rotating the locking member 2, and then fix the blood pump mechanism 3 on the predetermined chamber. The ventricular connection assembly has fewer parts and a simple structure. Compared with the prior art, the height of the entire connection assembly is reduced, the overall size of the ventricular assist device is further reduced, and the dragging of the ventricular connection assembly on the myocardial tissue can be reduced, the surgical steps can be simplified, the surgical cost can be reduced, and the harm to the patient can be reduced.

[0068] If it is necessary to disassemble the inflow tube 31, the locking member 2 can be pried by a tool so that the protrusion 211 disengages from the receiving groove 132, and then the snap-fitting fixation of the second connecting member 13 and the locking member 2 is released. Then, continue to rotate the locking member 2 in the second direction b. The locking member 2 drives the first connecting member 12 to move away from the second connecting member 13 to expand the inner diameter of the opening ring 11, so that the operator can adjust the position of the inflow tube 31 or pull out the inflow tube 31 from the opening ring 11.

[0069] Further, when the opening ring 11 is in a non-clamping state, the locking member 2 can be continuously rotated in the second direction b so that a portion of the opening ring 11 near the first end 111 is deformed, thereby expanding the inner diameter of the opening ring 11.

[0070] Refer to Figures 2 - 4 As shown, the clamping assembly 1 further includes a fixing ring 14. The opening ring 11 is disposed in the inner ring of the fixing ring 14. The fixing ring 14 has an opening, and the opening position of the opening ring 11 corresponds to the opening position of the fixing ring 14. A portion of the outer ring surface of the opening ring 11 near the second end 112 is connected to the inner ring surface of the fixing ring 14, and another portion of the outer ring surface of the opening ring 11 near the first end 111 is separated from the inner ring surface of the fixing ring 14. That is to say, the portion of the opening ring 11 near the first end 111 is deformable and movable.

[0071] With such a setting, the second connecting member 13 can be connected to the fixing ring 14 so that the second connecting member 13 cannot move relative to the fixing ring 14. There are gaps between the first connecting member 12 and the fixing ring 14 and the second connecting member 13 respectively. After the locking member 2 rotates, it can drive the first connecting member 12 to move relative to the fixing ring 14 and the second connecting member 13 to adjust the inner diameter of the opening ring 11.

[0072] Further, the clamping assembly 1 further includes a snap-fitting structure 15. The snap-fitting structure 15 is fixed on one side of the fixing ring 14 and jointly encloses a sunk groove 151 with the fixing ring 14 (refer to Figure 3 ). The snap-fitting structure 15 and the fixing ring 14 can be integrally formed or separately processed.

[0073] Refer to Figure 9a 、 Figure 9b AndFigure 9c As shown, in a preferred embodiment, the end of the locking member 2 is provided with a cam structure 22. When the locking member 2 rotates in the second direction b, the cam structure 22 can be urged to contact the second connecting member 13. The cam structure 22 is configured to urge the first connecting member 12 to move away from the second connecting member 13 under the drive of the locking member 2, so as to expand the inner diameter of the split ring 11.

[0074] More specifically, before the inflow pipe 31 penetrates into the split ring 11, the locking member 2 is rotated in the second direction b until the locking member 2 can no longer rotate. During this process, the arc-shaped outer contour of the cam structure 22 of the locking member 2 can rotate on the side of the second connecting member 13 close to the first connecting member 12 after contacting the second connecting member 13. The arc-shaped outer contour of the cam structure 22 abuts against the side of the second connecting member 13, and there are action and reaction forces between the two. The second connecting member 13 is fixed, and the first connecting member 12 is deformable and movable. Therefore, the reaction force drives the first connecting member 12 to move away from the second connecting member 13, so as to achieve the effect of expanding the inner diameter of the split ring 11, facilitating the sleeving of the split ring 11 and the inflow pipe 31 in place. After the inflow pipe 31 is installed in place, when the operator needs to adjust the circumferential position between the inflow pipe 31 and the pump body 32, only the locking member 2 needs to be rotated in the second direction b. At this time, the part of the split ring 11 close to the first end 111 deforms, thereby expanding the inner diameter of the split ring 11, and the operator can retract the inflow pipe 31 and readjust the installation position of the inflow pipe 31 on the split ring 11.

[0075] As a preferred solution, a convex portion 152 (refer to Figure 3 、 Figure 4 and Figure 9a ) is provided at the end of the engaging structure 15 close to the second end 112 of the split ring 11, and a groove 221 (refer to Figure 11a ) cooperating with the convex portion 152 is provided on the cam structure 22. When the locking member 2 rotates in the second direction b, the convex portion 152 can be placed in the groove 221, so that the locking member 2 is in the locked position, and further the inner diameter of the split ring 11 reaches the maximum.

[0076] With such a setting, on the one hand, it can remind the operator that when the convex portion 152 is placed in the groove 221, the inner diameter of the split ring 11 reaches the maximum, preventing the operator from continuing to rotate the locking member 2 and causing damage to the ventricular connection assembly; on the other hand, when the convex portion 152 is placed in the groove 221, the locking member 2 can be located in the locked position. During actual operation, only the locking member 2 needs to be rotated to the locked position, and the split ring 11 can maintain the maximum inner diameter. In this way, it can be avoided that the operator always holds the locking member 2 when expanding the split ring 11, causing inconvenience.

[0077] As Figure 10aAs shown, in a specific embodiment, a straight line perpendicular to the bottom wall of the groove 221 is set as the first preset auxiliary line xy. The locking member 2 is hinged to the first connecting member 12 to form a connection point 121. The connection point 121 is arranged on the side of the first preset auxiliary line xy close to the first connecting member 12, so that the convex portion 152 can apply a torsional force to the cam structure 22 to cause the cam structure 22 to rotate in the second direction b.

[0078] In addition, a stop portion 222 is provided on the cam structure 22 (refer to Figure 9c , Figure 10b and Figure 11b ). When the convex portion 152 is placed in the groove 221, the stop portion 222 is used to abut against the first connecting member 12 to prevent the cam structure 22 from continuing to rotate relative to the first connecting member 12 under the torsional force of the convex portion 152.

[0079] More specifically, by arranging the connection point 121 on the side of the first preset auxiliary line xy close to the first connecting member 12, the convex portion 152 can apply a torsional force in the second direction b to the cam structure 22 after entering the groove 221, and the stop portion 222 can prevent the locking member 2 from continuing to rotate in the second direction b. Therefore, the locking member 2 can remain stationary under the combined action of the convex portion 152 and the stop portion 222, so that the split ring 11 is maintained in the maximum inner diameter state.

[0080] As an alternative embodiment, a connection portion is provided at the end of the locking member 2 away from the first connecting member 12. The connection portion is used to connect with an external component to pry the locking member 2 through the external component.

[0081] Referring to Figures 12a - 12c and Figures 13a - 13b shown, in this embodiment, the connection portion is a rectangular groove 23, that is to say, a rectangular groove 23 is provided at one end of the locking member 2 away from the cam structure 22. When the locking member 2 is snap-fitted and fixed to the second connecting member 13 (refer to Figures 12a - 12c ), at least part of the rectangular groove 23 is located outside the circumference of the pump body 32. When it is necessary to disassemble the inflow pipe 31 (that is, when it is necessary to separate the split ring 11 from the inflow pipe 31), an external tool (such as a flat tool) can be inserted into the rectangular groove 23 to perform a rotational movement in the second direction b until the locking member 2 is separated from the second connecting member 13 (refer to Figures 13a - 13c ), so that it is convenient for the operator to disassemble the inflow pipe 31.

[0082] Returning to refer to Figure 5 and Figure 6 shown, one of a convex bump and a depression is provided on the side of the first connecting member 12 facing the second connecting member 13, and the other of the convex bump and the depression is provided on the side of the second connecting member 13 facing the first connecting member 12. When the split ring 11 is in a clamped state, at least part of the convex bump is placed in the depression and abuts against the depression.

[0083] Continue to refer to Figure 5 and Figure 6 As shown, in this embodiment, a convex hull 122 is provided on the first connecting member 12, and a recess 133 corresponding to the convex hull 122 is provided on the second connecting member 13.

[0084] When constructed in this way, when the split ring 11 clamps the inflow tube 31, the first connecting member 12 and the second connecting member 13 of the split ring 11 abut against each other. This design can improve the axial stiffness and strength of the split ring 11, so as to prevent the inflow tube 31 and the split ring 11 from moving relative to each other axially, resulting in misalignment of the first connecting member 12 and the second connecting member 13 in the axial direction of the split ring 11, so as to avoid deformation and damage of the first end 111 of the split ring 11 when the inflow tube 31 is separated from the clamping assembly 1 (that is, when the inflow tube 31 is pulled out from the inner hole of the split ring 11).

[0085] Please refer to Figure 14a , Figure 14b and Figure 15 , and in combination with Figures 16a - 16c , the ventricular assist device further includes a pressure ring 4 and a felt 5. The pressure ring 4 is used to enter the sink 151 and is detachably connected to the engaging structure 15. The felt 5 is placed between the pressure ring 4 and the engaging structure 15. After the pressure ring 4 and the engaging structure 15 are connected, they can clamp and fix the felt 5, that is, after the pressure ring 4 and the engaging structure 15 are connected, they can jointly clamp the felt 5 to fix the engaging structure 15, the pressure ring 4 and the felt 5 as a whole. During actual implantation, the felt 5 can be sutured to the outer wall of the apex of the ventricle.

[0086] In a specific embodiment, the sink 151 is provided on the side of the engaging structure 15 facing away from the pump body 32. At least two first protruding segments 153 are provided along the circumferential direction of the engaging structure 15 on the side edge of the engaging structure 15 away from the fixing ring 14 (refer to Figure 3 and Figure 4 ), the first protruding segment 153 protrudes in the direction of the split ring 11, that is, the first protruding segment 153 protrudes towards the inside of the engaging structure 15. The plurality of first protruding segments 153 are arranged at intervals along the circumferential direction of the engaging structure 15. At this time, a first recessed segment 154 is formed between adjacent first protruding segments 153.

[0087] Refer to Figure 14a and Figure 14b , the pressure ring 4 is provided with at least two second protruding segments 41 along its circumferential direction. The plurality of second protruding segments 41 are arranged at intervals along the circumferential direction of the pressure ring 4. At this time, a second recessed segment 42 is formed between adjacent second protruding segments 41. That is to say, both the engaging structure 15 and the pressure ring 4 have concave and convex surfaces arranged at intervals along their circumferential directions.

[0088] The concave-convex surface design at the edges of the engaging structure 15 and the pressing ring 4 can limit the relative movement between the engaging structure 15 and the pressing ring 4. During assembly, the concave-convex surfaces of the engaging structure 15 and the pressing ring 4 are misaligned and fitted. The pressing ring 4 can be easily placed into the sinking groove 151. Subsequently, the pressing ring 4 or the engaging structure 15 is rotated by a predetermined angle (for example, rotated by 45°). At this time, the first protruding segments 153 and the second protruding segments 41 correspond to each other one by one, so that one first protruding segment 153 abuts against a corresponding second protruding segment 41 to realize the extrusion and fixation of the engaging structure 15, the pressing ring 4, and the felt 5.

[0089] Preferably, the dimensions of the first protruding segments 153 and the second protruding segments 41 in the circumferential direction of the engaging structure 15 or the pressing ring 4 are substantially equal, and the dimensions of the first recessed segments 154 and the second recessed segments 42 in the circumferential direction of the engaging structure 15 or the pressing ring 4 are substantially equal.

[0090] Specifically, when the pressing ring 4 is installed, multiple second protruding segments 41 of the pressing ring 4 can be placed in a corresponding first recessed segment 154 provided on the engaging structure 15 so that the pressing ring 4 completely enters the sinking groove 151. Then the pressing ring 4 is rotated so that the first protruding segments 153 of the engaging structure 15 and the second protruding segments 41 of the pressing ring 4 at least partially overlap on a predetermined projection plane, where the predetermined projection plane refers to a plane perpendicular to the axis of the engaging structure 15. At this time, the second protruding segments 41 of the pressing ring 4 can abut against the first protruding segments 153 on the engaging structure 15 to limit the pressing ring 4 in the sinking groove 151, thereby realizing the clamping and fixation of the pressing ring 4 and the engaging structure 15 on the felt 5.

[0091] Refer to Figure 8 As shown, in a preferred example, an annular groove 311 is provided at the end of the inflow pipe 31 close to the upper cover 321 of the pump body 32, and the opening ring 11 is used for clamping and fixing in the annular groove 311. The advantage of this is that, on the one hand, since the outer diameter of the non-annular groove 311 position on the inflow pipe 31 is greater than the outer diameter of the annular groove 311 position, when the opening ring 11 is sleeved on the non-annular groove 311 position of the inflow pipe 31, the locking member 2 fails to move into place, so that the locking member 2 cannot be engaged with the second connecting member 13. Such a setting can remind the operator that the inflow pipe 31 is not installed in place; on the other hand, the opening ring 11 is limited in the annular groove 311, which can prevent the opening ring 11 from axially moving.

[0092] Preferably, the pressing ring 4 is provided with a first through hole 43 for passing a suture (refer to Figure 14a and Figure 14b ), and the felt 5 is provided with a second through hole (not labeled) for passing a suture. The suture passes through the first through hole 43 and the second through hole in sequence to fix the pressing ring 4 and the felt 5. Refer to Figure 15 and Figure 16aAs shown, the position of the first through hole 43 on the pressure ring 4 corresponds to the opening position of the engaging structure 15. The engaging structure 15 also has an opening, and the opening position of the engaging structure 15 corresponds to the opening position of the opening ring 11. The advantage of such a setting is that at the opening position of the engaging structure 15, the pressing effect of the pressure ring 4 and the engaging structure 15 is not good. Therefore, the first through hole 43 and the second through hole are provided, and the pressure ring 4 and the felt 5 are fixed by the suture thread.

[0093] Further preferably, at least one spherical convex portion 141 (refer to Figure 2 and Figure 7 ) is provided on the fixing ring 14 and / or the opening ring 11, that is, the spherical convex portion 141 can be provided on the fixing ring 14 or on the opening ring 11. When the number of the spherical convex portions 141 is multiple, the spherical convex portions 141 can also be respectively provided on the fixing ring 14 and the opening ring 11.

[0094] Refer to Figure 8 As shown, on the side of the upper cover 321 of the pump body 32 facing the opening ring 11, a plurality of continuous spherical grooves 322 matching the spherical convex portions 141 are provided, and the plurality of spherical grooves 322 are arranged in sequence along the circumferential direction of the inflow pipe 31. The spherical convex portions 141 are used to be received and limited in corresponding spherical grooves 322 to limit the relative rotation between the pump body 32 and the opening ring 11.

[0095] Specifically, the number of the spherical grooves 322 is N times the number of the spherical convex portions 141, and N is a positive integer. For example, when the number of the spherical convex portions 141 is 3 and the number of the spherical grooves 322 is 3, the pump body 32 can be adjusted circumferentially at an angle of 120° on the premise of ensuring that the spherical convex portions 141 are limited in the spherical grooves 322. When the number of the spherical convex portions 141 is 3 and the number of the spherical grooves 322 is 6, the pump body 32 can be adjusted circumferentially at an angle of 60°.

[0096] The upper cover 321 of the pump body 32 is provided with a plurality of continuous spherical grooves 322, so that when the pump body 32 rotates at any angle relative to the clamping assembly 1, the angle adjustment is more precise, and thus the more precise installation requirements of the pump body 32 can be adapted.

[0097] During the installation of the blood pump mechanism 3 on the ventricular connection assembly, the operator can rotate the pump body 32 relative to the fixing ring 14, thereby adjusting the fixing position of the pump body 32. After the pump body 32 is adjusted in place, the operator pushes the pump body 32 in the direction of the predetermined chamber so that the spherical convex portions 141 enter the spherical grooves 322, and the spherical convex portions 141 can be limited in the spherical grooves 322, thereby preventing the blood pump mechanism 3 from rotating relative to the ventricular connection assembly during operation.

[0098] In this embodiment, the number of spherical convex portions 141 is three, and the three spherical convex portions 141 are uniformly arranged along the circumferential direction of the fixing ring 14, so that the pump body 32 and the ventricle connection assembly are firmly fixed in the circumferential direction. In other embodiments, the number of spherical convex portions 141 may also be one, two or more. The present application does not limit the number of spherical convex portions 141.

[0099] In a non-limiting embodiment, the implantation process of the ventricular assist device is as follows:

[0100] Before implanting the ventricular assist device, connect the pressure ring 4 and the engaging structure 15, and fix the felt 5 between the pressure ring 4 and the engaging structure 15. During the implantation process, first suture the felt 5 to the outer wall of the predetermined chamber.

[0101] Secondly, expand the opening ring 11, and insert the inflow pipe 31 of the blood pump mechanism 3 into the opening ring 11. Adjust the position of the pump body 32 so that the opening ring 11 is located in the annular groove 311 of the inflow pipe 31, and at the same time, the spherical convex portion 141 on the fixing ring 11 enters the spherical groove 322 of the upper cover 321 of the pump body 32.

[0102] Finally, after the pump body 32 is fixed to the clamping assembly 1, rotate the locking member 2 in the first direction a until the locking member 2 engages with the second connecting member 13, thereby realizing the clamping and fixing of the inflow pipe 32 by the clamping assembly 1. At this time, the blood pump mechanism 3 can be fixed to the outer wall of the preset chamber through the ventricle connection assembly.

[0103] In summary, in the ventricle connection assembly and the ventricular assist device provided by the present invention, the ventricle connection assembly can realize the clamping and fixing operation of the inflow pipe 31 by the clamping assembly 1 only by rotating the locking member 2, and then fix the blood pump mechanism 3 to the predetermined chamber. The ventricle connection assembly has fewer parts, a simple structure, reliable assembly, convenient operation, can also reduce the overall size of the ventricular assist device, thereby reducing the drag of the ventricle connection assembly on the myocardial tissue, simplifying the surgical procedure, reducing the surgical cost, and reducing the harm brought to the patient by the surgery.

[0104] The above description is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the art of the present invention according to the above disclosure shall fall within the protection scope of the present invention.

Claims

1. A ventricular connection assembly, characterized in that: It comprises a clamping assembly and a locking member; the clamping assembly comprises an open ring, a first connecting member and a second connecting member; the open ring has a first end and a second end, the first end and the second end are spaced apart, the first connecting member is connected to the first end, and the second connecting member is connected to the second end; the locking member is rotatably connected to the first connecting member; The locking member is provided with a limiting surface; the end of the second connecting member is provided with an inclined surface; when the locking member rotates in the first direction, the limiting surface moves along the inclined surface of the second connecting member, prompting the first connecting member to move in a direction close to the second connecting member, so that the inner diameter of the open ring is reduced; A protrusion is provided on the limiting surface; a receiving groove is provided on the inclined surface or at the end of the inclined surface; when the locking member rotates relative to the first connecting member along the first direction, the protrusion can enter the receiving groove, so that the locking member and the second connecting member are engaged; The open ring has a clamping state and a non-clamping state; the locking member can engage with the second connecting member when moving along the first direction, so that the open ring is in the clamping state; the locking member can also disengage from the second connecting member when moving along the second direction, so that the open ring is in the non-clamping state; the first direction and the second direction are opposite.

2. The ventricular connection assembly according to claim 1, characterized in that: The clamping assembly also includes a fixing ring and a snap-fit ​​structure, the open ring is arranged in the inner ring of the fixing ring, the fixing ring has an opening, and the opening position of the open ring corresponds to the opening position of the fixing ring; the outer ring surface of the open ring close to the second end is fixedly connected to the inner ring surface of the fixing ring, and the outer ring surface of the open ring close to the first end is separated from the inner ring surface of the fixing ring; the snap-fit ​​structure is fixed on one side of the fixing ring, and together with the fixing ring, forms a sink.

3. The ventricular connection assembly according to claim 2, characterized in that: The end of the locking member is arranged as a cam structure, and when the locking member rotates along the second direction, the cam structure can be caused to contact the second connecting member. The cam structure is used to cause the first connecting member to move away from the second connecting member under the drive of the locking member to expand the inner diameter of the open ring.

4. The ventricular connection assembly according to claim 3, characterized in that: The engaging structure is provided with a convex portion, and the cam structure is provided with a groove matched with the convex portion; when the locking member rotates along the second direction, the convex portion can enter the groove to place the locking member in a locked position.

5. The ventricular connection assembly according to claim 4, characterized in that: A straight line perpendicular to the bottom wall of the groove is set as a first preset auxiliary line, and the locking member is hinged to the first connecting member to form a connection point; the connection point is set on a side of the first preset auxiliary line close to the first connecting member; The cam structure is also provided with a stopper; when the protrusion enters the groove, the stopper is used to abut against a side of the first connecting member away from the second connecting member to prevent the locking member from continuing to rotate along the second direction.

6. The ventricular connection assembly according to claim 1, wherein: The first connecting member is provided with one of a convexity and a concaveity on the side facing the second connecting member, and the second connecting member is provided with the other of a convexity and a concaveity on the side facing the first connecting member; when the open ring is in a clamping state, at least part of the convexity is placed in the concave and abuts against the concave.

7. The ventricular connection assembly according to claim 2, characterized in that: It also includes a pressure ring and a felt, wherein the pressure ring is used to enter the sink and is detachably connected to the clamping structure; the felt is placed between the pressure ring and the clamping structure; after the pressure ring and the clamping structure are connected, the felt can be clamped and fixed; At least two first protruding sections are circumferentially arranged on the snap-fit ​​structure; at least two second protruding sections are circumferentially arranged on the pressure ring; the first protruding sections correspond to the second protruding sections one by one, and one first protruding section and one second protruding section abut against each other to achieve extrusion and fixation of the snap-fit ​​structure, the pressure ring and the felt.

8. The ventricular connection assembly according to claim 1, wherein: A connecting portion is provided at the end of the locking member away from the first connecting member, and the connecting portion is used to be connected to an external component so as to drive the locking member to rotate through the external component.

9. A ventricular assist device, characterized in that: It comprises a blood pump mechanism and a ventricular connection assembly as described in any one of claims 1-8, wherein the blood pump mechanism comprises an inflow tube and a pump body connected to each other, the inflow tube can be inserted into the open ring, and the open ring can clamp the inflow tube in the clamping state.

10. The ventricular assist device according to claim 9, wherein: An annular groove is arranged at the end of the inlet pipe close to the upper cover of the pump body, and the open ring is used for clamping and fixing in the annular groove.

11. The ventricular assist device according to claim 9, wherein: The clamping assembly further comprises a fixing ring with an opening, wherein the fixing ring is arranged in the inner ring of the fixing ring, and the opening position of the fixing ring corresponds to the opening position of the fixing ring; the outer ring surface of the fixing ring close to the second end is fixedly connected to the inner ring surface of the fixing ring, and the outer ring surface of the fixing ring close to the first end is separated from the inner ring surface of the fixing ring; At least one spherical protrusion is provided on the fixed ring and / or the open ring, and a plurality of continuous spherical grooves matching the spherical protrusion are provided on the side of the upper cover of the pump body facing the open ring, and the plurality of spherical grooves are arranged in sequence along the circumference of the inlet pipe; the spherical protrusion is used to be accommodated and limited in a corresponding one of the spherical grooves to limit the relative rotation of the pump body and the open ring.

Images