Clamping mechanism and ventricular assist system

Abstract

The application provides a clamping mechanism, comprising a clamping ring and a locking assembly, the clamping ring comprising a ring body and a limiting buckle ear, the ring body being provided with a gap, the ring body having opposite first and second ends, the first and second ends being spaced apart to form the gap; the limiting buckle ear being arranged at the first end, the limiting buckle ear being provided with a limiting buckle hole. The locking assembly comprises a handle and a connecting arm, the handle being rotationally connected to the second end; one end of the connecting arm being rotationally connected to the handle, the other end being provided with a movable buckle ear, the movable buckle ear being buckled with the limiting buckle ear and being movable in the limiting buckle hole; the handle being rotatable to drive the movable buckle ear of the connecting arm to move in the limiting buckle hole, so as to adjust the distance between the first and second ends and the inner diameter of the ring body. The clamping mechanism provided by the application is buckled with the movable buckle ear and the limiting buckle ear, so that the operator can directly drive the connecting arm to move by rotating the handle, thereby improving the operation convenience of the clamping mechanism. The application also provides a ventricular assist system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a clamping mechanism and a ventricular assist system. BACKGROUND

[0002] A ventricular assist device is a device for assisting patients with severe ventricular dysfunction or heart failure to provide a certain blood flow and blood pressure. The outlet pipe of the ventricular assist device is connected to the aorta or the pulmonary artery through an artificial blood vessel, and the clamping mechanism is used to fix the artificial blood vessel to the outlet pipe of the ventricular assist device.

[0003] However, the operation of the conventional clamping mechanism is not convenient enough and needs to be improved. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide a clamping mechanism and a ventricular assist system that can improve the convenience of operation. The above purpose is achieved by the following technical solutions.

[0005] In a first aspect, the present application provides a clamping mechanism, comprising:

[0006] a clamping ring, the clamping ring comprising a ring body and a limiting buckle ear; the ring body is provided with a notch, the ring body has opposite first and second ends, the first and second ends are spaced apart to form the notch; the limiting buckle ear is provided at the first end, and the limiting buckle ear is provided with a limiting buckle hole; and

[0007] a locking assembly, the locking assembly comprising a handle and a connecting arm, the handle being rotationally connected to the second end; one end of the connecting arm is rotationally connected to the handle, and the other end is provided with a movable buckle ear, the movable buckle ear is buckled with the limiting buckle ear and can move in the limiting buckle hole;

[0008] wherein, when the handle rotates, the movable buckle ear of the connecting arm can move in the limiting buckle hole to adjust the distance between the first and second ends, and the inner diameter of the ring body is adjusted.

[0009] In an embodiment, the limiting buckle ear comprises an abutting column and a surrounding plate, the abutting column is protruded from the ring body, the surrounding plate is connected with the abutting column, the surrounding plate, the abutting column and the ring body jointly enclose the limiting buckle hole; the movable buckle ear can abut against the abutting column, and the handle can pull the abutting column through the movable buckle ear to reduce the distance between the first and second ends.

[0010] In an embodiment, the surrounding plate has a first connecting end and a second connecting end distanced from the first connecting end, the first connecting end is connected with the abutting column, the abutting column is arranged on the outer circumferential surface of the ring body, wherein: the second connecting end is fixedly connected with the outer circumferential surface of the ring body; or the abutting column is arranged on the outer circumferential surface of the ring body, and the second connecting end is spaced apart from the outer circumferential surface of the ring body by a distance.

[0011] In an embodiment, the abutting column is arranged on the outer circumferential surface of the ring body, the surrounding plate extends along an arc in the circumferential direction of the ring body, the surrounding plate has a first connecting end and a second connecting end distanced from the first connecting end, the first connecting end is connected with the abutting column, the first connecting end is spaced apart from the outer circumferential surface of the ring body by a first distance, and the end of the second connecting end is spaced apart from the outer circumferential surface of the ring body by a second distance, the second distance is smaller than the first distance.

[0012] In an embodiment, one end of the abutting column distanced from the ring body is provided with a stepped portion, the stepped portion has a connected stepped bottom surface and a stepped side surface, the stepped bottom surface is distanced from the ring body, the surrounding plate has a first connecting end, the first connecting end is connected with the abutting column, the first connecting end has a connected inner surface and a first end surface, the inner surface is abutted with the stepped bottom surface, and the first end surface is abutted with the stepped side surface.

[0013] In an embodiment, the stepped portion further has a stepped top surface distanced from the ring body, the stepped top surface is connected with the stepped side surface, and the first connecting end further has an outer surface distanced from the inner surface, the outer surface is flush with the stepped top surface.

[0014] In an embodiment, the surrounding plate has a first connecting end and a second connecting end distanced from the first connecting end, the first connecting end is connected with the abutting column, and the second connecting end has a second end surface, wherein:

[0015] the second end surface is provided as an arc surface and is abutted and fixedly connected with the outer circumferential surface of the ring body; or the second end surface is an arc surface or an inclined surface, so that the second end surface is directed towards the ring body, and the second end surface is spaced apart from the outer surface of the ring body by a distance.

[0016] In an embodiment, the movable buckle ear is provided with a movable buckle hole for the limiting buckle ear to pass through, wherein:

[0017] the length of the abutting column in the axial direction of the ring body is smaller than the width of the movable buckle hole in the axial direction of the ring body; and / or the surrounding plate has a first connecting end, the first connecting end is connected with the abutting column, and the length of the first connecting end in the axial direction of the ring body is equal to the length of the abutting column in the axial direction of the ring body.

[0018] In an embodiment, the first end of the ring body is provided with a radial thickening on the outer circumferential surface thereof, the radial thickening has a first surface facing away from the outer circumferential surface of the ring body, a projection of the abutment post along its length direction is located within the boundary of the first surface; the first surface has a first side edge away from the second end of the ring body, an end surface of an end of the abutment post fixedly connected with the first surface has a second side edge, the second side edge is located on a side of the abutment post away from the second end of the ring body, and the first side edge is spaced apart from the second side edge by a distance.

[0019] An arc-shaped or inclined transition step surface is formed between the outer circumferential surface of the ring body and the side of the first surface away from the second end.

[0020] In an embodiment, the surrounding plate has a first connecting end and a second connecting end away from the first connecting end, the first connecting end is connected with the abutment post, the surrounding plate has an arc-shaped guide surface extending from the second connecting end to the first connecting end, and the movable buckle ear can slide along the guide surface.

[0021] In an embodiment, the limiting buckle hole extends along the circumference of the ring body by a length, so that the movable buckle ear can also move along the circumference of the ring body in the limiting buckle hole.

[0022] In an embodiment, the limiting buckle hole is a through hole penetrating the limiting buckle ear along the axial direction of the ring body, and the movable buckle ear is a buckle ring or a buckle hook arranged in the through hole.

[0023] In an embodiment, the clamping mechanism further has at least one of the following features:

[0024] The ring body is provided with a plurality of suture holes arranged between the first end and the second end along the circumference of the ring body;

[0025] The handle is rotatably connected with the second end by a pin shaft, a side surface of the second end protrudes an axial protruding plate capable of abutting with an outlet pipe of a ventricular assist device, the axial protruding plate is provided with an avoiding groove corresponding to the position of the pin shaft, so that the pin shaft can be installed to the second end of the ring body from the avoiding groove.

[0026] In an embodiment, the end surface of the first end is provided with a press-fit protrusion extending towards the second end, the press-fit protrusion is arranged in the notch, the press-fit protrusion has a press-fit surface close to the central axis of the ring body, and the press-fit surface is smoothly transitioned with the inner circumferential surface of the ring body.

[0027] In a second aspect, the present application further provides a ventricular assist system, comprising a ventricular assist device, an artificial blood vessel and any of the above clamping mechanisms, the ventricular assist device is provided with an outlet pipe, the artificial blood vessel is sleeved on the outlet pipe, the ring body of the clamping mechanism is sleeved on the artificial blood vessel, and the locking assembly can lock the artificial blood vessel to the outlet pipe.

[0028] Compared with the prior art, the clamping mechanism and the ventricular assist system provided by the present application can adjust the inner diameter of the ring body by providing a notch on the ring body, and can always connect the connecting arm and the limiting buckle on the clamping ring by providing a limiting buckle on the first end of the ring body and an active buckle on one end of the connecting arm of the locking assembly, and the active buckle is buckled with the limiting buckle. Compared with the traditional clamping mechanism which manually buckles the connecting arm and the clatching hook on the clamping ring and then rotates the handle to adjust the inner diameter of the ring body, the present application buckles the active buckle of the connecting arm with the limiting buckle of the clamping ring, so that the operator does not need to manually buckle the connecting arm and the clatching hook on the clamping ring, and can directly move the connecting arm by rotating the handle to make the active buckle move in the limiting buckle hole, thereby adjusting the inner diameter of the ring body, and improving the operation convenience of the clamping mechanism.

[0029] These aspects or other aspects of the present application will be more apparent in the following description of the embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0031] Figure 1 is a structural schematic view of the ventricular assist system provided by the present application.

[0032] Figure 2 is an assembly view of the clamping mechanism and the artificial blood vessel provided by the present application.

[0033] Figure 3 is a structural schematic view of the clamping mechanism provided by the first embodiment of the present application.

[0034] Figure 4 is Figure 3 is a structural schematic view of the clamping mechanism shown in another view.

[0035] Figure 5 is Figure 3 is a structural schematic view of the clamping mechanism shown in another view.

[0036] Figure 6 is Figure 5Enlarged view of a detail at P1.

[0037] Figure 7 is Figure 5 Enlarged view of a detail at P2.

[0038] Figure 8 is Figure 3 Partially exploded view of the clamping mechanism.

[0039] Figure 9 is Figure 3 Partially exploded view of the clamping mechanism (excluding the locking assembly).

[0040] Figure 10 is Figure 9 Structural schematic view of the clamping mechanism from another perspective.

[0041] Figure 11 is Figure 3 Another partially exploded view of the clamping mechanism.

[0042] Figure 12 is Figure 2 Split view of the clamping mechanism and the artificial blood vessel.

[0043] Figure 13 is Figure 2 Front view of the clamping mechanism and the artificial blood vessel assembled.

[0044] Figure 14 is Figure 13 Sectional view along the A-A direction.

[0045] Figure 15 is a structural schematic view of the clamping mechanism provided by the second embodiment of the present application.

[0046] Figure 16 is Figure 15 Enlarged view of a detail at P3.

[0047] Among the above drawings, the following reference signs are included:

[0048] 1, Ventricular assist system; 10, Clamping mechanism; 100, Clamping ring; 110, Ring body; 111, Outer peripheral surface; 1112, Second surface; 1113, Transition step surface; 112, Inner peripheral surface; 114, Notch; 116, Second end; 1161, Avoidance slot; 1162, Axial protruding plate; 1163, Avoidance groove; 117, Pin shaft; 118, First end; 1181, Pressing protrusion; 1182, Radial thickening; 1183, First surface; 1184, Pressing surface; 1185, First side edge; 119, Suture hole; 1191, First opening; 1192, Second opening; 120, Limiting buckle lug; 122, Abutting column; 1221, Step portion; 1223, Step bottom surface; 1225, Step side surface; 1227, Step top surface; 1228, Second side edge; 124, Baffle; 1241, First connecting end; 1243, Inner surface; 1245, First end surface; 1246, Guide surface; 1247, Outer surface; 1248, Second connecting end; 1249, Second end surface; 126, Limiting buckle hole; 130, Locking assembly; 131, Handle; 1312, Rotating end; 1314, Free end; 1315, Avoidance slot; 133, Connecting arm; 1332, Movable buckle lug; 1334, Movable buckle hole; 140, Fixed ring; 143, Annular groove; 145, Assembly through hole; 147, Limiting boss; 148, Guide protrusion; 1481, Guide surface; 1483, Limiting surface; 160, Sealing ring; 161, Guide inclined surface; 162, Annular protrusion; 164, Assembly protrusion; 20, Ventricular assist device; 21, Outlet tube; 23, Pump body; 40, Artificial blood vessel; 41, Main body tube segment; 43, Connecting tube segment; 45, Turnover tube segment; 60, Blood vessel sheath; 61, Mounting hole; L, Center axis; D1, First distance; D2, Second distance. DETAILED DESCRIPTION

[0049] In order to facilitate the understanding of the embodiments of the present application, the embodiments of the present application will be described in more detail below with reference to the relevant drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the embodiments of the present application herein are only for the purpose of describing the specific embodiments and are not intended to limit the present application.

[0051] The inventor of the present application finds that when the doctor operates the existing clamping mechanism in the operation, the connecting arm of the clamping mechanism needs to be buckled with the catch on the clamping ring first, and then the clamping ring is locked by rotating the handle to fix the artificial blood vessel on the outlet pipe of the ventricular assist device. That is, the doctor needs to manually buckle the connecting arm with the catch before rotating the handle, and the operation of the clamping mechanism is not convenient, which indirectly affects the progress of the operation.

[0052] Therefore, the present application provides a clamping mechanism and a ventricular assist system. The limiting buckle lug is arranged on the outer periphery of the ring body, and the connecting arm of the locking assembly is provided with a movable buckle lug. The limiting buckle lug and the movable buckle lug are buckled, so that the operator does not need to manually buckle the connecting arm with the catch on the clamping ring, and can directly move the connecting arm by rotating the handle to make the movable buckle lug abut against the limiting buckle lug to adjust the inner diameter of the ring body, thereby improving the operation convenience of the clamping mechanism. The clamping mechanism and the ventricular assist system provided by the present application are described in detail below in combination with the specific embodiments and the accompanying drawings.

[0053] Please refer to Figure 1 and Figure 2 , the ventricular assist system 1 comprises a clamping mechanism 10, a ventricular assist device 20 and an artificial blood vessel 40. The ventricular assist device 20 is provided with an outlet pipe 21, the artificial blood vessel 40 is sleeved on the outlet pipe 21, the clamping mechanism 10 is sleeved on the artificial blood vessel 40, and the clamping mechanism 10 can lock the artificial blood vessel 40 on the outlet pipe 21.

[0054] In the embodiment, the clamping mechanism 10 is used to lock the artificial blood vessel 40. In other embodiments, the clamping mechanism 10 can also be used to lock other pipeline structures that need to transport liquid, which will not be described here.

[0055] The ventricular assist device 20 further comprises a pump body 23, and the outlet pipe 21 is connected to one side of the pump body 23. The inside of the pump body 23 is provided with an impeller, and the blood can be pumped to the outlet pipe 21 through the rotation of the impeller.

[0056] Please refer to Figure 3 and Figure 4The clamping mechanism 10 comprises a clamping ring 100 and a locking assembly 130. The clamping ring 100 comprises a ring body 110 and a limiting buckle ear 120. The ring body 110 is provided with a gap 114. The ring body 110 has a first end 118 and a second end 116 opposite to each other. The first end 118 and the second end 116 are spaced to form the gap 114, so that the inner diameter of the ring body 110 is adjustable. The limiting buckle ear 120 is arranged at the first end 118 and is provided with a limiting buckle hole 126. The locking assembly 130 comprises a handle 131 and a connecting arm 133. The handle 131 is rotationally connected to the second end 116. One end of the connecting arm 133 is rotationally connected to the handle 131, and the other end is provided with a movable buckle ear 1332. The movable buckle ear 1332 is buckled with the limiting buckle ear 120 and is movable in the limiting buckle hole 126. When the handle 131 rotates, the movable buckle ear 1332 of the connecting arm 133 is movable in the limiting buckle hole 126, so as to adjust the distance between the first end 118 and the second end 116, i.e. adjust the size of the gap 114, thereby adjusting the inner diameter of the ring body 110.

[0057] In the illustrated embodiment, the limiting buckle ear 120 and the handle 131 are arranged on the outer circumferential surface of the ring body 110. Since the outlet pipe 21 of the ventricular assist device 20 and the artificial blood vessel 40 need to pass through the ring body 110, arranging the limiting buckle ear 120 and the handle 131 on the outer circumferential surface of the ring body 110 not only facilitates the operation of the clamping mechanism 10, but also enables the width of the gap 114 in the axial direction of the ring body 110 to be as equal as possible when the first end 118 and the second end 116 of the ring body 110 are subjected to force. If the limiting buckle ear 120 and the handle 131 are arranged on the side surface of the ring body 110, when the axial length of the ring body 110 is large, the side where the limiting buckle ear 120 and the handle 131 are arranged will be subjected to a larger force, while the opposite side will be subjected to a smaller force, which will result in a smaller width of the gap 114 on the side subjected to a larger force, and a larger width of the gap 114 on the side subjected to a smaller force. If the limiting buckle ear 120 and the handle 131 are arranged at the ends of the first end 118 and the second end 116 of the ring body 110, the gap 114 will be large. In some embodiments, the limiting buckle ear 120 can also be arranged on the end surface of the ring body 110, for example, the end surface of the first end 118. At this time, the handle 131 can still be arranged on the outer circumferential surface of the ring body 110, or other positions facilitating cooperation with the limiting buckle ear 120. In some embodiments, the limiting buckle ear 120 can also be arranged on the side surface of the ring body 110, and the handle 131 can also be arranged on the side surface of the ring body 110. In order to enable the width of the gap 114 in the axial direction of the ring body 110 to be as equal as possible when the first end 118 and the second end 116 are subjected to force, the axial width of the ring body 110 can be reduced, or a reinforcing structure can be arranged at the first end 118 and the second end 116, and the like.

[0058] In the present embodiment, as shown in Figure 3As shown, the axial direction of the ring body 110 refers to the extension direction of the central axis L of the ring body 110; the radial direction of the ring body 110 refers to the radius or diameter direction of the ring body 110 and is perpendicular to the axial direction of the ring body 110; and the circumferential direction of the ring body 110 refers to the circumferential direction of the ring body 110.

[0059] Specifically, the clamping mechanism 10 is used to lock the artificial blood vessel 40 to the outlet pipe 21 of the ventricular assist device 20, wherein one end of the artificial blood vessel 40 communicates with the outlet pipe 21, and the other end communicates with the aorta or pulmonary artery of the heart, so as to deliver blood from the ventricle to the aorta or pulmonary artery through the operation of the ventricular assist device 20.

[0060] The locking assembly 130 has an unlocked state and a locked state. When the locking assembly 130 is in the unlocked state, the inner diameter of the ring body 110 increases, and the locking of the artificial blood vessel 40 is released, so that the artificial blood vessel 40 can be separated from the outlet pipe 21. When the locking assembly 130 is in the locked state, the inner diameter of the ring body 110 decreases, and the locking assembly 130 locks the artificial blood vessel 40 to the outlet pipe 21 of the ventricular assist device 20. It should be noted that since the limiting buckle ear 120 is buckled with the movable buckle ear 1332, the movable buckle ear 1332 of the connecting arm 133 is always connected with the limiting buckle ear 120 of the ring body 110, and there is no case that the movable buckle ear 1332 is separated from the limiting buckle ear 120, whether the locking assembly 130 is in the unlocked state or the locked state.

[0061] Please refer to Figure 1 、 Figures 3 to 5 The ring body 110 is substantially annular, can be sleeved on the outer periphery of the artificial blood vessel 40, and the inner diameter of the ring body 110 can be adjusted by the locking assembly 130. The reduction of the inner diameter of the ring body 110 can fix the artificial blood vessel 40 to the outlet pipe 21 of the ventricular assist device 20, and the increase of the inner diameter of the ring body 110 can separate the artificial blood vessel 40 from the outlet pipe 21 of the ventricular assist device 20.

[0062] The ring body 110 has an outer peripheral surface 111 and an inner peripheral surface 112 opposite to the outer peripheral surface 111, wherein the inner peripheral surface 112 can abut against the artificial blood vessel 40, and the outer peripheral surface 111 can be used to arrange the limiting buckle ear 120, the handle 131 and other structures. In this embodiment, both the inner peripheral surface 112 and the outer peripheral surface 111 can be connected with the artificial blood vessel 40.

[0063] The ring body 110 has a notch 114 which penetrates the sidewall of the ring body 110 and communicates with the inner hole of the ring body 110, so that the ring body 110 is an open structure, thereby enabling the inner diameter of the ring body 110 to be adjusted. The notch 114 provided on the ring body 110 enables the ring body 110 to form opposite first and second ends 118 and 116, respectively, which can be used to provide a handle 131 and a limiting lug 120, respectively. When the first and second ends 118 and 116 are close to each other, the inner diameter of the ring body 110 decreases; when the first and second ends 118 and 116 are away from each other, the inner diameter of the ring body 110 increases. In order to increase the strength of the ring body 110, the thickness of the first and second ends 118 and 116 of the ring body 110 is greater than the thickness of other positions of the ring body 110.

[0064] The end surface of the first end 118 is provided with a press-fit protrusion 1181 extending towards the second end 116, the press-fit protrusion 1181 is arranged in the notch 114, and the press-fit protrusion 1181 has a press-fit surface 1184 close to the central axis L of the ring body 110, the press-fit surface 1184 is smoothly transitioned with the inner peripheral surface 112 of the ring body 110, so that the press-fit surface 1184 and the inner peripheral surface 112 of the ring body 110 can abut the artificial blood vessel 40 to compress the artificial blood vessel 40, thereby avoiding the situation that the part of the artificial blood vessel 40 corresponding to the notch 114 is not compressed due to the notch 114 of the ring body 110, so as to realize the compression of the artificial blood vessel 40 as much as possible. 360°, thereby reducing the probability of blood leakage from between the artificial blood vessel 40 and the outlet pipe 21.

[0065] In the present embodiment, the second end 116 is provided with a position avoiding groove 1161, the position of the position avoiding groove 1161 corresponds to the position of the press-fit protrusion 1181, and the position avoiding groove 1161 can avoid the press-fit protrusion 1181. Specifically, when the inner diameter of the ring body 110 decreases, the width of the notch 114 decreases, and the press-fit protrusion 1181 can extend into the position avoiding groove 1161, thereby avoiding the press-fit protrusion 1181 being stopped by the second end 116 and unable to reduce the inner diameter of the ring body 110. At the same time, during the distance reduction process of the first and second ends 118 and 116 of the ring body 110, the press-fit protrusion 1181 can partially extend into the position avoiding groove 1161, so that the press-fit protrusion 1181 has a longer length in the circumferential direction of the ring body 110, thereby being more conducive to realizing the compression of the artificial blood vessel 40 360°. It can be understood that when the locking assembly 130 is in the locked state, the press-fit protrusion 1181 can be partially located in the position avoiding groove 1161, or can be outside the position avoiding groove 1161. If the press-fit protrusion 1181 is outside the position avoiding groove 1161, the end of the press-fit protrusion 1181 away from the first end 118 is as close as possible to the slot opening of the position avoiding groove 1161 in the circumferential direction of the ring body 110. In some embodiments, the end of the press-fit protrusion 1181 away from the first end 118 is flush with the slot opening of the position avoiding groove 1161 in the circumferential direction of the ring body 110.

[0066] Referring to Figures 4 to 7 , the limit buckle ear 120 is arranged on the outer circumferential surface 111 of the ring body 110, and the limit buckle ear 120 is buckled with the movable buckle ear 1332, so that the connecting arm 133 and the limit buckle ear 120 of the clamping ring 100 are always connected. Compared with the traditional clamping mechanism, the connecting arm and the clamping ring are buckled by manual operation, and then the handle is rotated to adjust the inner diameter of the ring body. In the present application, the movable buckle ear 1332 of the connecting arm 133 is buckled with the limit buckle ear 120 of the clamping ring 100, so that the operator does not need to manually buckle the connecting arm 133 and the clamping ring. The step of buckling is only needed to directly rotate the handle 131 to drive the connecting arm 133 to move, so that the movable buckle ear 1332 of the connecting arm 133 buckled with the limit buckle hole 120 moves in the limit buckle hole 120, so that the first end 118 and the second end 116 of the ring body 110 are close to each other, thereby adjusting the inner diameter of the ring body 110, and improving the operation convenience of the clamping mechanism 10, and avoiding affecting the operation progress as much as possible.

[0067] The limit buckle hole 126 is a through hole penetrating the limit buckle ear 120 along the axial direction of the ring body 110, and the movable buckle ear 1332 is a buckle ring or a buckle hook penetrating the through hole. The movable buckle ear 1332 is always buckled with the limit buckle ear 120. In some embodiments, the limit buckle hole 126 can also be a blind hole recessed into the limit buckle ear 120 along the axial direction of the ring body 110, and the movable buckle ear 1332 is a buckle hook inserted into the blind hole. For example, the limit buckle hole 126 forms a guide rail, and when the handle 131 is rotated, the buckle hook formed by the movable buckle ear 1332 can move in the guide rail, and the movable buckle ear 1332 can also be always buckled with the limit buckle ear 120.

[0068] In the present embodiment, the limit buckle ear 120 includes an abutting column 122 and a surrounding plate 124, and the abutting column 122 is protruded from the ring body 110. The surrounding plate 124, the abutting column 122 and the ring body 110 jointly surround the limit buckle hole 126. For example, the surrounding plate 124, the abutting column 122 and the outer circumferential surface 111 of the ring body 110 jointly surround the limit buckle hole 126. The movable buckle ear 1332 can abut against the abutting column 122. The handle 131 can pull the abutting column 122 through the movable buckle ear 1332 to reduce the distance between the first end 118 and the second end 116, thereby reducing the inner diameter of the ring body 110. Specifically, the movable buckle ear 1332 can abut against the inner side of the abutting column 122, wherein the inner side of the abutting column 122 refers to the part of the abutting column 122 for defining the limit buckle hole 126. In the present embodiment, the surrounding plate 124, the abutting column 122 and the ring body 110 can jointly form a closed limit buckle hole 126 to avoid the movable buckle ear 1332 of the connecting arm 133 from being separated from the limit buckle ear 120.

[0069] In the embodiment, the abutting column 122 is protruded from the outer circumferential surface 111 of the ring body 110. In other embodiments, the abutting column 122 is protruded from the side surface of the ring body 110.

[0070] In the embodiment, the limiting buckle hole 126 is formed by the abutting column 122, the surrounding plate 124 and the ring body 110. In some embodiments, the limiting buckle lug 120 can also be a protruding block, the limiting buckle lug 120 is protruded from the outer circumferential surface 111 of the ring body 110, and the limiting buckle hole 126 is a hole formed on the limiting buckle lug 120. In other embodiments, the limiting buckle lug 120 can also be a ring structure protruded from the outer circumferential surface of the ring body 110, for example, a circular ring structure.

[0071] Please refer to Figures 8 to 10 In the embodiment, the abutting column 122 is substantially cuboid. The abutting column 122 is provided with a stepped portion 1221 at the end away from the ring body 110, and the stepped portion 1221 is connected with one end of the surrounding plate 124. Specifically, the stepped portion 1221 is fixedly connected with one end of the surrounding plate 124. The stepped portion 1221 is arranged at the side of the abutting column 122 away from the handle 131. Specifically, the stepped portion 1221 has a connected stepped bottom surface 1223 and a stepped side surface 1225, and the stepped bottom surface 1223 is away from the ring body 110.

[0072] The surrounding plate 124 is substantially an arc-shaped plate structure. The surrounding plate 124 has a first connecting end 1241 connected with the abutting column 122. The first connecting end 1241 of the surrounding plate 124 has a connected inner surface 1243 and a first end surface 1245, the inner surface 1243 faces the outer circumferential surface 111 of the ring body 110, and abuts against the stepped bottom surface 1223. The inner surface 1243 of the first connecting end 1241 of the surrounding plate 124 is the inner surface of the surrounding plate 124, i.e. the surface of the surrounding plate 124 facing the ring body 110. The first end surface 1245 abuts against the stepped side surface 1225, so that the first connecting end 1241 of the surrounding plate 124 can be adapted to the stepped portion 1221, and the surrounding plate 124 and the abutting column 122 are in surface-to-surface contact, which increases the contact area of the two, and is beneficial to increase the connection strength of the surrounding plate 124 and the abutting column 122. In the embodiment, the stepped bottom surface 1223 and the stepped side surface 1225 are substantially perpendicular. In other embodiments, the included angle between the stepped bottom surface 1223 and the stepped side surface 1225 can also be an acute angle or an obtuse angle.

[0073] The stepped portion 1221 further has a stepped top surface 1227 facing away from the ring body 110, and the stepped top surface 1227 is connected with the stepped side surface 1225. The first connecting end 1241 further has an outer surface 1247 facing away from the inner surface 1243, and the outer surface 1247 is connected with the first end surface 1245. The outer surface 1247 is flush with the stepped top surface 1227 along the circumferential direction of the ring body 110, so that the top of the limiting buckle ear 120 is relatively flat, and the damage to the operator due to unevenness is reduced as much as possible, thereby avoiding the damage to the operator as much as possible.

[0074] In the embodiment, the abutting column 122 and the first connecting end 1241 of the enclosing plate 124 can be connected by welding. In other embodiments, the abutting column 122 and the first connecting end 1241 of the enclosing plate 124 can also be connected by other means such as bonding, or fixedly connected by welding on the basis of bonding.

[0075] The enclosing plate 124 further has a second connecting end 1248 away from the first connecting end 1241. The enclosing plate 124 extends along an arc in the circumferential direction of the ring body 110. The first connecting end 1241 is spaced apart from the outer circumferential surface 111 of the ring body 110 by a first distance D1. The end of the second connecting end 1248 is spaced apart from the outer circumferential surface 111 of the ring body 110 by a second distance D2, and the second distance D2 is less than the first distance D1. In the embodiment, the second connecting end 1248 is fixedly connected with the outer circumferential surface 111 of the ring body 110, i.e., the second distance D2 is equal to zero.

[0076] Specifically, the second connecting end 1248 has a second end surface 1249 connected with the inner surface of the enclosing plate 124. In the embodiment, the second end surface 1249 is provided as an arc surface, and the second end surface 1249 is in abutment and fixedly connected with the outer circumferential surface 111 of the ring body 110. Since the outer circumferential surface 111 of the ring body 110 is also an arc surface, the abutment of the two arc surfaces can increase the contact area between them as much as possible, thereby increasing the connection strength between the enclosing plate 124 and the ring body 110. It should be noted that the second end surface 1249 is also connected with the outer surface 1247. In the embodiment, the second end surface 1249 and the outer circumferential surface 111 can be fixedly connected by welding. In other embodiments, the second end surface 1249 and the outer circumferential surface 111 can also be connected by bonding, and the second connecting end 1248 of the enclosing plate 124 can also be inserted into the ring body 110. The second connecting end 1248 and the ring body 110 can also be connected by other means, and the specific connection means can be set according to the actual situation.

[0077] The surrounding plate 124 further has an arc-shaped guiding surface 1246, which is a part of the inner surface of the surrounding plate 124, and extends from the second connecting end 1248 to the first connecting end 1241, i.e. in the illustrated embodiment, the guiding surface 1246 extends from one end of the connecting ring body 110 of the surrounding plate 124 to the end of the surrounding plate 124 connected with the abutting column 122. The movable buckle ear 1332 can slide along the guiding surface 1246, so that the movement of the movable buckle ear 1332 in the limiting buckle hole 126 is more smooth, to cooperate with the rotation of the handle 131, thereby further improving the operation convenience of the clamping mechanism 10. In addition, the guiding surface 1246 of the surrounding plate 124 is arc-shaped, and compared with a slope, the width of the limiting buckle hole 126 is larger, which is beneficial to the rotation of the movable buckle ear 1332 in the limiting buckle hole 126. In other embodiments, the guiding surface 1246 can also be provided as a slope, which can guide the movable buckle ear 1332 to slide in the limiting buckle hole 126.

[0078] Please refer to Figures 5 to 7 The outer circumferential surface of the first end 118 of the ring body 110 is provided with a radial thickening portion 1182, which protrudes from the outer circumferential surface 111 of the ring body 110 in a direction away from the central axis L of the ring body 110. The press-fit protrusion 1181 is arranged on the end surface of the radial thickening portion 1182 facing the second end 116. The radial thickening portion 1182 increases the thickness of the first end 118 in the radial direction of the ring body 110, thereby increasing the strength of the first end 118 and reducing the probability of deformation or bending of the first end 118 under external force.

[0079] The radial thickening portion 1182 has a first surface 1183 away from the outer circumferential surface 111 of the ring body 110, and the abutting column 122 is fixedly connected to the first surface 1183. The outer circumferential surface 111 of the ring body 110 includes a second surface 1112 corresponding to the limiting buckle hole 126, i.e. the second surface 1112 is a part of the hole wall of the limiting buckle hole 126.

[0080] Please refer to Figures 8 to 10, the projection of the abutting column 122 along its length direction is located within the boundary of the first surface 1183, so that the projection of the abutting column 122 on the first surface 1183 does not exceed the boundary of the first surface 1183, and the cross-sectional area of the abutting column 122 is not greater than the area of the first surface 1183. In the embodiment, the first surface 1183 has a first side edge 1185 away from the second end 116 of the ring body 110, and the end face of the end of the abutting column 122 fixedly connected with the first surface 1183 has a second side edge 1228 located on the side of the abutting column 122 away from the second end 116 of the ring body 110, and the first side edge 1185 is spaced apart from the second side edge 1228 by a distance, so that in the circumferential direction of the ring body 110, the abutting column 122 and the ring body 110 have at least a part of the radial thickening portion 1182 therebetween, that is, the abutting column 122 and the ring body 110 are transitionally connected by the at least part of the radial thickening portion 1182, rather than being directly fixedly connected. By spacing the first side edge 1185 and the second side edge 1228 apart by a distance, the stress at the connection between the abutting column 122 and the ring body 110 is dispersed when the inner diameter of the ring body 110 is reduced, so as to avoid stress concentration at the connection between the abutting column 122 and the ring body 110, to reduce or avoid the possibility of fracture at the junction between the abutting column 122 and the radial thickening portion 1182, and to improve the service life of the clamping mechanism 10.

[0081] In the embodiment, an arc-shaped or inclined transition step surface 1113 is formed between the outer peripheral surface 111 of the ring body 110 and the side of the first surface 1183 away from the second end 116 of the ring body 110, that is, the transition step surface 1113 is formed between the second surface 1112 and the first surface 1183, and the transition step surface 1113 is arranged as an arc-shaped surface or an inclined surface, so that when the handle 131 pulls the first end 118 to approach the second end 116, the transition step surface 1113 can further disperse the stress at the junction between the radial thickening portion 1182 and the ring body 110. In addition, in some embodiments, when the handle 131 pulls the first end 118 to approach the second end 116, the movable buckle ear 1332 can move along the second surface 1112, the transition step surface 1113 and the first surface 1183 in sequence, so that the transition step surface 1113 can guide the movement of the movable buckle ear 1332 in the limiting buckle hole 126, and the transition step surface 1113 is arranged as an arc-shaped surface or an inclined surface, so that the movement of the movable buckle ear 1332 is smoother, thereby further improving the operation convenience of the clamping mechanism 10.

[0082] The handle 131 is substantially arc-shaped plate structure, the handle 131 can be rotatably connected with the second end 116 of the clamping ring 100 through the pin shaft 117. Specifically, when the handle 131 is opened, the end of the handle 131 away from the ring body 110 moves away from the ring body 110, at this time, the locking assembly 130 is in the unlocked state. When the handle 131 is closed, the end of the handle 131 away from the ring body 110 moves towards the ring body 110, at this time, the locking assembly 130 is in the locked state. In this embodiment, the curvature of the handle 131 is the same as the curvature of the ring body 110, so that when the handle 131 is closed, the handle 131 can be as close to the ring body 110 as possible, which can reduce the overall size of the clamping mechanism 10 and reduce the contact between the clamping mechanism 10 and other organs in the body. In addition, the curvature of the handle 131 is the same as the curvature of the ring body 110, which can also avoid the opening angle of the handle 131 relative to the ring body 110 being too large in the locked state, which causes the handle 131 to be accidentally touched to unlock the locking assembly 130, that is, it can be as possible to avoid accidentally touching the handle 131 to unlock the locking assembly 130.

[0083] The side of the second end 116 is provided with an axial protruding plate 1162 which can abut against the outlet pipe 21 of the ventricular assist device 20, the axial protruding plate 1162 is substantially rectangular plate structure, and protrudes from the side of the second end 116 along the axial direction of the ring body 110. The axial protruding plate 1162 can abut against the outlet pipe 21 of the ventricular assist device 20 along the circumferential direction of the ring body 110, so that when the clamping mechanism 10 fixes the artificial blood vessel 40 to the outlet pipe 21, the clamping mechanism 10 can limit the rotation of the clamping mechanism 10 along the circumferential direction of the ring body 110 by abutting against the outlet pipe 21 through the axial protruding plate 1162, which is beneficial to the fixation of the artificial blood vessel 40.

[0084] Please continue to refer to Figure 7 The plate surface of the axial protruding plate 1162 away from the central axis L of the ring body 110 is provided with a avoiding recess 1163 corresponding to the position of the pin shaft 117, so as to avoid the installation of the pin shaft 117, so that the pin shaft 117 can be installed to the second end 116 of the ring body 110 from the avoiding recess 1163, which reduces the assembly difficulty of the handle 131. Wherein, the avoiding recess 1163 corresponds to the position of the pin shaft 117, that is, the central axis of the pin shaft 117 on the axial protruding plate 1162 is located on the groove bottom surface of the avoiding recess 1163, that is, the avoiding recess 1163 and the pin shaft 117 do not stagger along the circumferential direction of the ring body 110.

[0085] Please refer to Figure 4The handle 131 comprises a rotating end 1312 and a free end 1314, the rotating end 1312 is rotatably connected to the ring body 110 through the pin shaft 117, and the free end 1314 is located at the opposite end of the rotating end 1312 of the handle 131, and the free end 1314 facilitates the rotation of the handle 131 by the operator. In order to further facilitate the rotation of the handle 131 by the operator, the side of the free end 1314 close to the outer circumferential surface 111 of the ring body 110 is further provided with a avoiding groove 1315, when the locking assembly 130 is in the locked state, the handle 131 is as close as possible to the ring body 110, and the avoiding groove 1315 is provided to facilitate the fingers of the operator to extend into, thereby further facilitating the rotation of the handle 131 by the operator.

[0086] The connecting arm 133 is substantially an L-shaped plate structure, and the connecting arm 133 can be rotatably connected with the handle 131 through the pin shaft 117, and it needs to be noted that the connecting arm 133 is connected to the side of the handle 131 close to the clamping ring 100. The connecting arm 133 is arranged at the position corresponding to the notch 114, and when the handle 131 drives the connecting arm 133 to move, the movable buckle ear 1332 of the connecting arm 133 abuts against the limiting buckle ear 120. With the continuous rotation of the handle 131, the connecting arm 133 drives the first end 118 to move towards the second end 116, thereby reducing the width of the notch 114 and the inner diameter of the ring body 110, so as to realize the locking of the artificial blood vessel 40 to the outlet pipe 21 of the ventricular assist device 20.

[0087] The movable buckle ear 1332 is provided with a movable buckle hole 1334 for the limiting buckle ear 120 to pass through, the length of the abutting column 122 in the axial direction of the ring body 110 is less than the width of the movable buckle hole 1334 in the axial direction of the ring body 110, so that the movable buckle ear 1332 can move relative to the abutting column 122 under the driving of the handle 131, thereby the rotation of the handle 131 is more smooth. The hole wall of the movable buckle hole 1334 abutting against the abutting column 122 and the surface of the abutting column 122 abutting against the movable buckle ear 1332 are mutually shaped, that is, the surface of the abutting column 122 abutting against the movable buckle ear 1332 and the surface of the movable buckle ear 1332 abutting against the abutting column 122 are mutually shaped, so that when the operator rotates the handle 131 to make the limiting buckle ear 120 abut against the movable buckle ear 1332, the contact area between the abutting column 122 and the movable buckle ear 1332 can be increased, the contact stress between the limiting buckle ear 120 and the movable buckle ear 1332 of the locking assembly 130 in the locked state is reduced, and the damage to the connecting arm 133 and the limiting buckle ear 120 is reduced.

[0088] In the embodiment, the length of the first connecting end 1241 in the axial direction of the ring body 110 is equal to the length of the abutting column 122 in the axial direction of the ring body 110, which can increase the length of the abutting column 122 in the axial direction of the ring body 110 as much as possible, thereby increasing the area of the connection between the abutting column 122 and the first connecting end 1241 and improving the connection strength between the abutting column 122 and the ring body 110.

[0089] The limiting buckle hole 126 extends along the circumference of the ring body 110 for a length, so that the movable buckle ear 1332 can also move along the circumference of the ring body 110 in the limiting buckle hole 126, that is, the movable buckle ear 1332 can not only slide along the guide surface 1246 in the limiting buckle hole 126, but also move along the circumference of the ring body 110, so that the movable buckle ear 1332 is more flexible, avoids the phenomenon that the handle 131 connected with the connecting arm 133 is stuck during rotation, improves the smoothness of the rotation of the handle 131, and further improves the operation convenience of the clamping mechanism 10. The movable buckle ear 1332 can rotate and move in the limiting buckle hole 126, and also makes the movable buckle ear 133 contact with each hole wall of the limiting buckle hole 126.

[0090] In the embodiment, the movable buckle ear 1332 sequentially contacts the second surface 1112, the transition step surface 1113 and the first surface 1183 during the movement of the movable buckle ear 1332 along the circumference of the ring body 110 in the limiting buckle hole 126. Since the transition step surface 1113 is arranged as an arc surface, when the handle 131 pulls the first end 118 to move close to the second end 116, the transition step surface 1113 can guide the movable buckle ear 1332 to move in the limiting buckle hole 126, so that the movement of the movable buckle ear 1332 is more smooth.

[0091] The width of the movable buckle hole 1334 along the circumference of the ring body 110 is greater than the width of the abutting column 122 along the circumference of the ring body 110, so that the abutting column 122 can move in the movable buckle hole 1334, thereby making the movement of the handle 131 and the connecting arm 133 more smooth and reducing the operation difficulty of the clamping mechanism 10.

[0092] Please refer to Figures 10 to 14The clamping ring 100 is provided with a suture hole 119. Specifically, the suture hole 119 is arranged on the ring body 110, and the artificial blood vessel 40 can be sutured and connected with the clamping ring 100 through the suture hole 119. The suture of the artificial blood vessel 40 and the clamping ring 100 can be completed before the operation, which can reserve sufficient suture time for the operator to suture the artificial blood vessel 40 to the clamping ring 100, and then the artificial blood vessel 40 can be fixed to the outlet pipe 21 by adjusting the locking assembly 130, thereby avoiding the cumbersome operation of binding the artificial blood vessel 40 to the outlet pipe 21 by using a binding line during the operation, and naturally avoiding the phenomenon of not being tightly bound caused by the busy or unskilled operation during the operation, thereby improving the assembly and disassembly efficiency of the artificial blood vessel 40 and the stability of the connection between the artificial blood vessel 40 and the outlet pipe 21 of the ventricular assist device 20. The artificial blood vessel 40 is sutured and connected with the clamping ring 100 through the suture hole 119 on the clamping ring 100, so that the artificial blood vessel 40 is fixedly connected with the clamping mechanism 10, and no additional locking structure is needed to fixedly connect the two, thereby simplifying the structure of the clamping mechanism 10.

[0093] The suture hole 119 penetrates the circumferential wall of the ring body 110. In the embodiment, the suture hole 119 penetrates the circumferential wall of the clamping ring 100 along the radial direction of the ring body 110, that is, the suture hole 119 is a straight hole; in other embodiments, the suture hole 119 can also be an inclined hole. The suture hole 119 has opposite first and second openings 1191 and 1192, wherein the first opening 1191 is arranged on the inner circumferential surface 112 of the ring body 110, and the second opening 1192 is arranged on the outer circumferential surface 111 of the ring body 110. In other embodiments, the first and second openings 1191 and 1192 of the suture hole 119 can both be arranged on the inner circumferential surface 112 of the ring body 110, or both be arranged on the outer circumferential surface 111 of the ring body 110, as long as the purpose of suturing and connecting the artificial blood vessel 40 with the clamping ring 100 through the suture hole 119 on the clamping ring 100 is met.

[0094] In the embodiment, the number of suture holes 119 is multiple, and the multiple suture holes 119 are arranged between the first end 118 and the second end 116 along the circumferential direction of the ring body 110, so that the suture line passing through the suture hole 119 can be arranged along the circumferential direction of the ring body 110, thereby making the overall structure of the clamping mechanism 10 more compact. In the embodiment, all the suture holes 119 are arranged at intervals along a circle of the circumferential direction of the ring body 110. In other embodiments, in addition to some suture holes 119 being arranged at intervals along a circle of the circumferential direction of the ring body 110, some suture holes 119 can also be arranged at other positions of the clamping ring 100, as long as the suture line can pass through.

[0095] In other embodiments, the clamping ring 100 can also not be provided with the suture hole 119, and the artificial blood vessel 40 can also be connected with the clamping ring 100 in a manner of adhesion. In still other embodiments, the artificial blood vessel 40 can also be connected with the clamping ring 100 in a manner of both adhesion and suture, which can be set according to actual conditions.

[0096] Please refer to Figure 11 and Figure 12 The clamping mechanism 10 further comprises a fixing ring 140, which is arranged along the axial direction of the ring body 110 and is fixedly connected with the part of the ring body 110 between the first end 118 and the second end 116. The fixing ring 140 can also be sleeved on the outlet pipe 21 of the ventricular assist device 20. When the clamping mechanism 10 is installed on the outlet pipe 21, the outlet pipe 21 is first matched with the clamping ring 100 and then matched with the fixing ring 140, that is, the clamping ring 100 is arranged close to the inner side of the outlet pipe 21, and the fixing ring 140 is arranged close to the pipe opening of the outlet pipe 21. The clamping mechanism 10 further comprises a sealing ring 160, which is arranged at the end of the fixing ring 140 away from the ring body 110 and located on the inner wall of the fixing ring 140. The sealing ring 160 can be used for sealing contact with the artificial blood vessel 40, so as to improve the sealing performance of the assembly between the artificial blood vessel 40 and the fixing ring 140 and avoid blood leakage from between the artificial blood vessel 40 and the outlet pipe 21.

[0097] In this embodiment, the sealing ring 160 can be a rubber ring, which has a deformation function and can achieve a sealing effect through deformation. Therefore, the rubber ring is fixedly arranged on the inner periphery of the fixing ring 140 and can be located between the artificial blood vessel 40 and the fixing ring 140. The rubber ring can be deformed in a squeezed state of the mutual sleeving assembly of the artificial blood vessel 40 and the fixing ring 140 to provide a good sealing effect. In other embodiments, the sealing ring 160 can also be a silica gel piece or a structure made of other materials with certain elasticity.

[0098] Please refer to Figure 13 and Figure 14 At least part of the inner wall of the sealing ring 160 can be provided with a guide inclined surface 161. The guide inclined surface 161 has a guiding effect and can guide the sleeving of the clamping mechanism 10 on the outlet pipe 21, so as to facilitate the installation of the clamping mechanism 10 on the outlet pipe 21 and avoid the clamping mechanism 10 from being unable to be smoothly sleeved on the outlet pipe 21 due to the abutting assembly state of the sealing ring 160 and the outlet pipe 21. The formation of the guide inclined surface 161 on the inner wall of the sealing ring 160 also causes the sealing ring 160 to abut against the artificial blood vessel 40, thereby reducing the probability of blood leakage from between the artificial blood vessel 40 and the outlet pipe 21.

[0099] In the embodiment, the inner diameter of the end of the sealing ring 160 close to the ring body 110 gradually decreases in the direction from the ring body 110 to the fixing ring 140, so as to form the guiding slope 161 on the inner wall of the sealing ring 160. Specifically, when the clamping mechanism 10 is installed on the outlet pipe 21, the clamping mechanism 10 moves in the direction from the fixing ring 140 to the clamping ring 100, and the gap between the sealing ring 160 and the outlet pipe 21 becomes smaller and smaller until the artificial blood vessel 40 abuts between the sealing ring 160 and the outlet pipe 21. In this way, the sealing performance of the assembly between the artificial blood vessel 40 and the fixing ring 140 can be improved, and blood leakage from between the artificial blood vessel 40 and the outlet pipe 21 can be avoided.

[0100] Please continue to refer to Figure 11 and Figure 12 In the embodiment, the inner wall of the fixing ring 140 is provided with an annular groove 143, and the outer wall of the sealing ring 160 is provided with an annular protrusion 162. The sealing ring 160 is assembled with the fixing ring 140 by embedding the annular protrusion 162 into the annular groove 143, so that the fixing ring 140 and the sealing ring 160 are stably and sleevedly assembled together. The number of the annular groove 143 and the annular protrusion 162 is consistent, and can be one or more. In addition, the fixing ring 140 is also provided with an assembly through hole 145, which is arranged on the groove bottom surface of the annular groove 143. The side of the annular protrusion 162 away from the inner surface 1243 of the sealing ring 160 is provided with an assembly protrusion 164, which cooperates with the assembly through hole 145, so that the clamping ring 100 and the sealing ring 160 are stably and sleevedly assembled together. The number of the assembly through hole 145 and the assembly protrusion 164 is consistent, and can be one or more. In other embodiments, the sealing ring 160 can also be integrally injection molded with the fixing ring 140, which is not limited here.

[0101] In the embodiment, the artificial blood vessel 40 includes a main body pipe segment 41 and a connecting pipe segment 43. The connecting pipe segment 43 is connected to one end of the main body pipe segment 41, and is arranged in the clamping ring 100 and is sutured and connected with the clamping ring 100 through the suture hole 119 on the clamping ring 100. The connecting pipe segment 43 can cover the first opening 1191, so that the suture line passes through the suture hole 119 and the connecting pipe segment 43, thereby realizing the suture connection between the artificial blood vessel 40 and the clamping mechanism 10.

[0102] In the embodiment, the artificial blood vessel 40 further comprises a folded tube segment 45 connected to one end of the connecting tube segment 43 away from the main tube segment 41, the folded tube segment 45 can be folded outward relative to the connecting tube segment 43 to cover one side of the suture hole 119 away from the connecting tube segment 43. That is, the folded tube segment 45 can cover the second opening 1192 of the suture hole 119, so that the suture can pass through the folded tube segment 45, the suture hole 119 and the connecting tube segment 43 in turn to suture the folded tube segment 45 and the clamping ring 100, thereby increasing the connection strength of the artificial blood vessel 40 and the clamping mechanism 10.

[0103] Please refer to Figure 1 , the ventricular assist system 1 further comprises a blood vessel sheath 60 connected to the fixing ring 140 and sleeved on the outer periphery of the artificial blood vessel 40. The blood vessel sheath 60 can be made of a hard material with a certain hardness to protect the artificial blood vessel 40 and prevent the artificial blood vessel 40 from being crushed to affect the flow of blood. The blood vessel sheath 60 is provided with a plurality of mounting holes 61 arranged along the circumference of the fixing ring 140, and the blood vessel sheath 60 can be connected to the fixing ring 140 through the mounting holes 61.

[0104] The end of the fixing ring 140 close to the clamping ring 100 is further provided with a limiting boss 147, which can be used to limit the blood vessel sheath 60 to limit the axial movement of the blood vessel sheath 60 along the fixing ring 140.

[0105] The end of the fixing ring 140 away from the clamping ring 100 is further provided with a guide protrusion 148, which is spaced from the limiting boss 147. The guide protrusion 148 can have a guiding effect on the blood vessel sheath 60 to guide the end of the blood vessel sheath 60 between the limiting boss 147 and the guide protrusion 148. In the embodiment, the number of guide protrusions 148 is multiple, and the multiple guide protrusions 148 are arranged along the circumference of the fixing ring 140, and each guide protrusion 148 can be embedded in one mounting hole 61.

[0106] The guide protrusion 148 comprises a guide surface 1481 and a limiting surface 1483 connected thereto, wherein the guide surface 1481 is an inclined surface extending from the end of the fixing ring 140 to a direction away from the central axis of the fixing ring 140, so as to guide the vascular sheath 60, and the central axis of the fixing ring 140 coincides with the central axis L of the ring body 110. The limiting surface 1483 is connected to the outer circumferential surface 111 of the fixing ring 140 and is opposite and spaced from the limiting boss 147. When the vascular sheath 60 is installed, the first end surface 1245 of the vascular sheath 60 moves along the axial direction of the fixing ring 140 under the guidance of the guide surface 1481, and when the end of the vascular sheath 60 is located between the limiting boss 147 and the limiting surface 1483, the guide protrusion 148 is embedded in the corresponding installation hole 61, so as to realize the connection between the vascular sheath 60 and the fixing ring 140.

[0107] In summary, the clamping mechanism 10 and the ventricular assist system 1 provided by the present application can adjust the inner diameter of the ring body 110 by arranging the notch 114 on the ring body 110, and can always connect the connecting arm 133 and the limiting buckle 120 of the clamping ring 100 by arranging the limiting buckle 120 on the first end 118 of the ring body 110 and arranging the movable buckle 1332 on one end of the connecting arm 133 of the locking assembly 130, and the movable buckle 1332 is buckled with the limiting buckle 120. Compared with the traditional clamping mechanism which manually buckles the connecting arm and the clamping ring, and then rotates the handle to adjust the inner diameter of the ring body, the present application buckles the movable buckle 1332 of the connecting arm 133 with the limiting buckle 120 of the clamping ring 100, so that the operator does not need to manually buckle the connecting arm 133 with the clamping ring 100, and can directly move the connecting arm 133 by rotating the handle 131 to make the movable buckle 1332 move in the limiting buckle hole 126, so as to adjust the inner diameter of the ring body 110, and improve the operation convenience of the clamping mechanism 10 and the ventricular assist system 1, and avoid affecting the operation progress as much as possible.

[0108] The clamping mechanism 10' of the second embodiment of the present application is substantially the same as the clamping mechanism 10 of the first embodiment, and the difference lies in that the connecting mode of the surrounding plate 124' and the ring body 110' of the second embodiment is different.

[0109] Please refer to Figure 13 and Figure 14In the embodiment, the second connecting end 1248' of the surrounding plate 124' is spaced apart from the outer circumferential surface 111' of the ring body 110', i.e., the second connecting end 1248' is not connected with the outer circumferential surface 111' of the ring body 110', so as to avoid the deformation of the ring body 110' caused by the movement of the limiting buckle ear 120 and the surrounding plate 124' driven by the movable buckle ear 1332' of the locking assembly 130' in the locked state. In other embodiments, the second connecting end 1248' can be fixedly connected with the outer circumferential surface 111' of the ring body 110'.

[0110] In the embodiment, the surrounding plate 124' extends along an arc in the circumferential direction of the ring body 110', the first connecting end 1241' is spaced apart from the outer circumferential surface 111' of the ring body 110' by a first distance D1, at this time, the first distance D1 is not zero, the end of the second connecting end 1248' is spaced apart from the outer circumferential surface 111' of the ring body 110' by a second distance D2, the second distance D2 is less than the first distance D1, so that the movable buckle ear 1332' has a larger space at the abutting position with the abutting column 122', which is beneficial for the movement of the movable buckle ear 1332' in the limiting buckle hole 126'.

[0111] In the embodiment, the second end surface 1249' of the surrounding plate 124' is an arc surface or an inclined surface, so as to be directed towards the ring body 110', and the second end surface 1249' is spaced apart from the outer surface of the ring body 110' by a distance, so as to avoid the deformation of the ring body 110' caused by the movement of the limiting buckle ear 120' and the surrounding plate 124' driven by the movable buckle ear 1332' of the locking assembly 130' in the locked state.

[0112] In the present application, the terms "first", "second" and the like are used only to distinguish descriptions, and cannot be understood as specific or special structures. The description of the term "some embodiments" means that the specific features, structures, materials or characteristics described in combination with the embodiments or examples are contained in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the different embodiments or examples described in the present application and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0113] The above embodiments are only used to illustrate the technical solutions of the present application, but not intended to limit the present application; even though the present application has been described in detail with reference to the foregoing embodiments, those ordinarily skilled in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A clamping mechanism, characterized by, The utility model relates to a clamp ring, locking assembly and clamp ring locking method, including: Clamp ring, the clamp ring includes ring body and limit buckle lug, the ring body is equipped with notch, the ring body has opposite first end and second end, the first end and the second end interval form the notch, the limit buckle lug is equipped in the first end, the limit buckle hole is equipped in the limit buckle lug, and Locking assembly, the locking assembly includes handle and connecting arm, the handle is rotatably connected with the second end, one end of the connecting arm is rotatably connected with the handle, the other end is equipped with movable buckle lug, the movable buckle lug is buckled with the limit buckle lug, and can be active in the limit buckle hole, Wherein, the handle can drive the movable buckle lug of the connecting arm to be active in the limit buckle hole when rotating, to adjust the distance between the first end and the second end, and adjust the inner diameter of the ring body, the limit buckle lug includes abutment column and fence, the abutment column is protruded to the ring body, the fence is connected with the abutment column, the fence, the abutment column and the ring body jointly enclose the limit buckle hole, the movable buckle lug can abut with the abutment column, the handle can pull the abutment column through the movable buckle lug, to reduce the distance between the first end and the second end, the limit buckle hole extends along the circumference of the ring body for a length, so that the movable buckle lug can also move along the circumference of the ring body in the limit buckle hole.

2. The clamping mechanism of claim 1, wherein, The fence has a first connection end and a second connection end away from the first connection end, the first connection end is connected with the abutment column, and the abutment column is arranged on the outer circumferential surface of the ring body, wherein: the second connection end is fixedly connected with the outer circumferential surface of the ring body; or, the second connection end is spaced apart from the outer circumferential surface of the ring body by a distance.

3. The clamping mechanism of claim 1, wherein, The abutment column is arranged on the outer circumferential surface of the ring body, the fence extends along an arc in the circumferential direction of the ring body, the fence has a first connection end and a second connection end away from the first connection end, the first connection end is connected with the abutment column, the first connection end is spaced apart from the outer circumferential surface of the ring body by a first distance, and the end portion of the second connection end is spaced apart from the outer circumferential surface of the ring body by a second distance, the second distance is less than the first distance.

4. The clamping mechanism of claim 1, wherein, The end of the abutment column away from the ring body is provided with a stepped portion, the stepped portion has a stepped bottom surface and a stepped side surface connected thereto, the stepped bottom surface faces away from the ring body, the fence has a first connection end, the first connection end is connected with the abutment column, the first connection end has an inner surface and a first end surface connected thereto, the inner surface abuts against the stepped bottom surface, and the first end surface abuts against the stepped side surface.

5. The clamping mechanism of claim 4, wherein, The stepped portion further has a stepped top surface facing away from the ring body, the stepped top surface is connected with the stepped side surface, and the first connection end further has an outer surface facing away from the inner surface, the outer surface is flush with the stepped top surface.

6. The chucking mechanism of claim 1, wherein The fence has a first connection end and a second connection end away from the first connection end, the first connection end is connected with the abutment column, and the second connection end has a second end surface, wherein: The second end face is an arc face and is attached to the outer circumferential face of the ring body; or the second end face is an arc face or an inclined face, so that the second end face faces the ring body and is spaced apart from the outer surface of the ring body by a distance.

7. The chucking mechanism of claim 1, wherein The movable buckle ear is provided with a movable buckle hole for the limiting buckle ear to pass through, wherein: The length of the abutting column in the axial direction of the ring body is less than the width of the movable buckle hole in the axial direction of the ring body; and / or the surrounding plate has a first connecting end connected with the abutting column, and the length of the first connecting end in the axial direction of the ring body is equal to the length of the abutting column in the axial direction of the ring body.

8. The chucking mechanism of claim 1, wherein, The outer circumferential face of the first end of the ring body is provided with a radial thickening part, the radial thickening part has a first surface facing away from the outer circumferential face of the ring body, the abutting column is fixed to the first surface, and the projection of the abutting column in the length direction thereof is located within the boundary of the first surface; the first surface has a first side edge away from the second end of the ring body, the end face of the end of the abutting column fixed to the first surface has a second side edge, the second side edge is located on the side of the abutting column away from the second end of the ring body, and the first side edge is spaced apart from the second side edge by a distance.

9. The clamping mechanism of claim 8, wherein, The outer circumferential face of the ring body and the side of the first surface away from the second end form an arc or inclined transition step face.

10. The chucking mechanism of claim 1, wherein, The surrounding plate has a first connecting end and a second connecting end away from the first connecting end, the first connecting end is connected with the abutting column, the surrounding plate has an arc-shaped guide face extending from the second connecting end to the first connecting end, and the movable buckle ear can slide along the guide face.

11. The chucking mechanism of claim 1, wherein, The clamping mechanism further has at least one of the following features: The ring body is provided with a plurality of suture holes arranged between the first end and the second end along the circumference of the ring body; The handle is rotatably connected to the second end through a pin shaft, the side surface of the second end is provided with an axial protruding plate capable of abutting an outlet pipe of a ventricular assist device, the axial protruding plate is provided with an avoiding groove corresponding to the position of the pin shaft, so that the pin shaft can be installed to the second end of the ring body from the avoiding groove.

12. The chucking mechanism of claim 1, wherein, The end face of the first end is provided with a pressing protrusion extending toward the second end, the pressing protrusion is arranged in the notch, the pressing protrusion has a pressing surface close to the central axis of the ring body, and the pressing surface is smoothly transitioned with the inner circumferential face of the ring body.

13. A ventricular assist system, characterized by The clamping mechanism comprises a ventricular assist device, an artificial blood vessel, and any one of claims 1-12, the ventricular assist device is provided with an outlet pipe, the artificial blood vessel is sleeved on the outlet pipe, the ring body of the clamping mechanism is sleeved on the artificial blood vessel, and the locking assembly can lock the artificial blood vessel to the outlet pipe.

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