Ventricular connection device and method for attaching and detaching a ventricular assist device

Abstract

The present application relates to a ventricular connection device and a method for attaching and detaching a ventricular assist device. The ventricular connection device includes a first connection component and a second connection component. The first connection component includes a first base, a first positioning portion, and an annular skirt. The second connection component includes a second base and a first stopper portion. When the second base is attached within a first through-hole, the first stopper portion is located at a second position, and the first positioning portion is provided on an end surface of the first stopper portion facing a first direction.

Description

[Technical Field]

[0001] The present application relates to the technical field of medical devices, and more particularly to a ventricular connection device and a method for attaching and detaching a ventricular assist device. [Background technology]

[0002] A ventricular assist device, also known as a blood pump, includes an inlet tube and an outlet tube. When implanted in the human body, the outlet tube is connected to the aorta via an artificial blood vessel, and the inlet tube is inserted into the ventricle through an opening at the apex of the heart. To fix the ventricular assist device relative to the heart, the ventricular assist device is usually connected to the heart by a ventricular connecting device. The ventricular connecting device may include a skirt and a positioning member, and the skirt is fixed to the heart by sutures. The positioning member is connected to the inlet tube of the ventricular assist device to fix the ventricular assist device relative to the heart. Summary of the Invention [Problem to be solved by the invention]

[0003] The present application provides a ventricular connection device and a method for attaching and detaching a ventricular assist device. [Means for solving the problem]

[0004] According to a first aspect, the present application provides a ventricular connection device, the ventricular connection device including a first connection component and a second connection component; The first connected component is a first base having a first through hole formed therein; a first positioning portion provided on an inner wall of the first through hole, The second connection component is a second base configured to be connected to a ventricular assist device, the second base having a second through-hole formed therein for insertion of an inlet tube of the ventricular assist device; a first stopper portion connected to the second base, When a partial structure of the second base is inserted into the first through-hole, the first stopper portion and the first positioning portion are elastically engaged with each other.

[0005] In one embodiment, the first stopper portion includes a first position where the first stopper portion elastically deforms toward a radially inward direction of the second through hole and a second position where the first stopper portion elastically returns to a radially outward direction of the second through hole, When a portion of the structure of the second base is inserted into the first through hole, the first stopper portion is located at a second position, and the first positioning portion is provided on an end face of the first stopper portion facing a first direction, the first direction being the direction opposite to the insertion direction of the second base.

[0006] In one embodiment, the second connection component further includes a resilient arm, the first stopper portion is connected to the resilient arm, and the resilient arm is resiliently deformable along a radial direction of the second through hole to switch the first stopper portion between a first position and a second position; The second base is a first frame configured in an annular shape with a second through hole formed inside; a second frame fitted around the circumferential outside of the first frame and having a first retraction opening formed therein; A portion of the elastic arm structure is located radially inward of the second frame, and the first stopper portion protrudes from the first retraction opening to the outer surface of the second frame.

[0007] In one embodiment, the surfaces of the first frame and the second frame facing each other are provided with a positioning cavity. The positioning cavity communicates with the first retraction opening, and the resilient arm is received within the positioning cavity.

[0008] In one embodiment, a second evacuation opening is provided at a position corresponding to the first evacuation opening of the first frame, and the dimension along the circumferential direction of the second through hole of the second evacuation opening is larger than the dimension along the circumferential direction of the second through hole of the first evacuation opening.

[0009] In one embodiment, the first frame is provided with a first anti-rotation groove, and the elastic arm includes a first anti-rotation portion that is inserted into the first anti-rotation groove.

[0010] In one embodiment, the number of first stopper portions is two, the shape of the elastic arm is configured to match the shape of the outer wall of the first frame, and the two first stopper portions are connected to two opposite ends of the elastic arm.

[0011] In one embodiment, a connection opening is formed in the first frame, and the numbers of the connection opening, the elastic arm, and the first stopper portion are the same and are provided in one-to-one correspondence; Each elastic arm has one end connected to the edge of the corresponding connection opening and the other end connected to the corresponding first stopper portion.

[0012] In one embodiment, the second frame is provided with a second anti-rotation groove, and the first frame is provided with a second anti-rotation part that is inserted into the second anti-rotation groove, The second anti-rotation portion is provided on the edge of the connection opening, and the second anti-rotation portion corresponds to the position of the first stopper portion in the circumferential direction of the second through hole.

[0013] In one embodiment, an end surface of the first stopper portion facing the second direction is formed as a slope, and the slope is inclined radially inward of the second through hole.

[0014] In one embodiment, the first positioning portion includes a plurality of positioning segments, the plurality of positioning segments being spaced apart in a circumferential direction of the first through hole, and the number of the first stopper portions is plural; When the second base is attached to the first through hole, the positioning segments are provided in one-to-one correspondence with an end surface of the first stopper portion facing the first direction; The gap between adjacent positioning segments defines a passage for the first stop portion to pass through.

[0015] In one embodiment, the first connecting component further includes a second positioning portion, the second positioning portion is provided on an inner wall of the first through hole, and the second positioning portion includes a plurality of internal tooth structures; The first stopper portion is provided with an external tooth structure that meshes with the internal tooth structure.

[0016] In one embodiment, the first connection component further includes an annular skirt, the skirt being connected to the first base and surrounding the first through hole; The first base is a third frame configured in an annular shape so that the first through hole is formed inside; and a fourth frame fitted onto the outer periphery of the third frame, the fourth frame having a skirt connected to the third frame.

[0017] In one embodiment, the first base further includes an annular crimping member, the crimping member is connected to an end of the fourth frame facing the second direction and extends radially outward from the fourth frame toward the outside of the first through hole, the second direction being opposite to the first direction; At least a portion of the skirt is structured to rest on the crimping member.

[0018] In one embodiment, the end of the fourth frame facing the second direction is provided with a plurality of piercing portions spaced apart along the circumferential direction of the first through hole, and third through holes are formed at positions corresponding to each piercing portion of the crimping member, and each piercing portion is inserted into the skirt through the corresponding third through hole.

[0019] In one embodiment, a flange portion is provided on an end portion of the third frame facing the second direction, and the skirt is sandwiched between the flange portion and the crimping member.

[0020] In one embodiment, the third frame includes a locking block provided on the outer circumferential surface, and a retraction groove is provided on the inner circumferential side of the crimping member and the fourth frame; The fourth frame further includes an engagement groove, the engagement groove communicates with the retraction groove of the fourth frame, The locking block is engaged with the engagement groove via the crimping member and the retraction groove of the fourth frame.

[0021] In one embodiment, the fourth frame is provided with a plurality of fourth through holes, and the plurality of fourth through holes are arranged at intervals along a circumferential direction of the first through hole; The skirt is secured to the fourth through hole by a sewing thread.

[0022] In one embodiment, the first positioning portion is provided on an inner wall of the fourth frame and is located at an end of the fourth frame facing the first direction.

[0023] In one embodiment, the ventricular connection device further comprises a plug; The plug is a plug base including an insertion portion, the second connection component being provided on the outside of the insertion portion, and the insertion portion being inserted into the second through hole; The plug is fitted into the insertion portion and is arranged sequentially along the axial direction of the second through hole together with the second connection component.

[0024] In one embodiment, the plug includes a plug body and a cover that covers the outside of the plug, the cover having a plurality of pore structures.

[0025] According to a second aspect, the present application provides a method for attaching and detaching a ventricular assist device, the ventricular assist device being implanted in or removed from a heart by the ventricular connection device, the first connection component further comprising an annular skirt, the skirt being connected to a first base; The method comprises: suturing the skirt to the surface of the heart and drilling a hole on the heart at a position corresponding to the first through-hole; providing a ventricular assist device having a second connection component connected thereto; and passing an inlet tube of the ventricular assist device through the first through-hole and the bore together with a portion of the second base structure until the first stopper portion and the first positioning portion are resiliently engaged.

[0026] In one embodiment, before suturing the skirt to the surface of the heart, the method comprises: The method further includes connecting one end of the first blood vessel to the aorta of the heart and the other end to an outlet tube of the ventricular assist device.

[0027] In one embodiment, the ventricular connection device further includes a plug, the second connection component is connected to the plug, and a portion of the plug structure is inserted into the second through-hole; The first positioning portion includes a plurality of positioning segments, and the plurality of positioning segments are The positioning segments are spaced apart along the circumferential direction of the through hole, and the space between adjacent positioning segments forms a passage for the first stopper portion to pass through; The method comprises: Providing a plug provided with a second connection component; driving the ventricular assist device to rotate the second connection component until the first stop portion is aligned with the passageway, and removing the ventricular assist device; The method further includes inserting the plug together with the second connection component into the first through hole, causing the first stopper portion to pass over the first positioning portion and engage with an end surface of the first positioning portion facing in a second direction opposite to the first direction.

[0028] In one embodiment, prior to the step of rotating the ventricular assist device until the first stop is aligned with the passageway and removing the ventricular assist device, the method further comprises: The method further includes the steps of isolating the first blood vessel from the aorta of the heart and occluding the opening in the aorta.

[0029] The details of one or more embodiments of the present application are set forth in the drawings and description below. Other features, objects, and advantages of the present application will become apparent from the description, drawings, and claims. [Brief explanation of the drawings]

[0030] In order to more clearly explain the technical solutions in the embodiments of the present application or the prior art, the following briefly introduces the drawings necessary for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application, and those skilled in the art can further derive other drawings based on these drawings without any creative work. [Figure 1]1 is a schematic diagram of a connection structure between a ventricular connection device and a ventricular assist device according to an embodiment of the present application. [Figure 2] FIG. 1 is an exploded view of a ventricular connection device according to an embodiment of the present application. [Figure 3] 1 is a structural schematic diagram of a second connection component in a ventricular connection device according to an embodiment of the present application. [Figure 4] 1 is a schematic diagram of a connection structure between a ventricular connection device and a ventricular assist device according to an embodiment of the present application. [Figure 5] FIG. 10 is an exploded view of a second connection component of a ventricular connection device according to an embodiment of the present application. [Figure 6] 1 is a schematic diagram of the structure of an elastic arm in a ventricular connection device according to an embodiment of the present application. [Figure 7] 10 is a schematic diagram of another configuration of a second connection component in a ventricular connection device according to an embodiment of the present application. FIG. [Figure 8] 10 is a schematic diagram of another configuration of a second connection component in a ventricular connection device according to an embodiment of the present application. FIG. [Figure 9] 1 is a cross-sectional view of a ventricular connection device according to an embodiment of the present application. [Figure 10] 10 is a schematic structural view of the ventricle connection device according to the embodiment of the present application immediately after the first stopper portion comes into contact with the first positioning portion. FIG. [Figure 11] 1 is a structural schematic diagram of a ventricular connection device according to an embodiment of the present application, in which a second connection component is attached to a first connection component. [Figure 12] 1 is a structural schematic diagram of a first connection component in a ventricular connection device according to an embodiment of the present application. [Figure 13] 10 is a structural schematic diagram of the first connection component of the ventricular connection device according to an embodiment of the present application, viewed from another angle. FIG. [Figure 14] FIG. 2 is an exploded view of a first connection component of a ventricular connection device according to an embodiment of the present application. [Figure 15] 1 is a cross-sectional view of a first connection component of a ventricular connection device according to an embodiment of the present application. [Figure 16]10 is a structural schematic diagram of the first connection component of the ventricular connection device according to an embodiment of the present application, viewed from another angle. FIG. [Figure 17] 10 is a schematic diagram of another configuration of a first connection component in a ventricular connection device according to an embodiment of the present application. FIG. [Figure 18] 10 is a cross-sectional view of another structure of a first connection component in a ventricular connection device according to an embodiment of the present application. FIG. [Figure 19] 1 is a schematic view of a ventricular connection device according to an embodiment of the present application from another angle. [Figure 20] 1 is a schematic diagram of the structure of a plug in a ventricular connection device according to an embodiment of the present application. [Figure 21] 1 is a cross-sectional view of a plug in a ventricular connection device according to an embodiment of the present application. [Figure 22] 1 is a structural schematic diagram of a ventricular connection device according to an embodiment of the present application, in which a plug is attached to a first connection component. [Figure 23] 1 is a flowchart illustrating a method for attaching and detaching a ventricular assist device according to an embodiment of the present application. [Explanation of symbols]

[0031] 100 ventricular connection device, 10 first connection component, 11 first positioning portion, 111 positioning segment, 1111 passage, 12 first base, 121 first through hole, 1211 chamfer structure, 123 third frame, 1231 locking block, 1232 first counterbore, 1233 second counterbore, 1234 fastener, 124 fourth frame, 1241 piercing portion, 1242 third through hole, 1243 engagement groove, 1245 fourth through hole, 1246 wiring groove, 1247 first external tooth structure, 125 flange portion, 1251 press strip portion, 13 skirt, 131 Sign portion, 14 second positioning portion, 15 crimping member, 151 first retreat groove, 152 second retreat groove, 153 first weld seam, 154 second weld seam, 20 second connection component, 21 first stopper portion, 211 inclined surface, 212 external tooth structure, 213 second base, 221 second through hole, 222 first frame, 2221 second anti-rotation portion, 223 second frame, 2230 positioning boss, 2240 positioning cavity, 2231 first escape opening, 2232 second escape opening, 2233 sealing portion, 2234 second anti-rotation groove, 224 stopper wall, 23 elastic arm, 231 first anti-rotation groove, 232 first anti-rotation portion, 24 seal ring, 241 mounting groove, 25 connection openings, 30 plug, 31 plug base, 310 base body, 3101 protrusion, 311 insertion portion, 3111 insertion hole, 32 plug, 321 plug body, 322 cover, 323 third weld seam, 324 fourth weld seam, 200 ventricular assist device, 210 inlet tube, 2101 inlet inner tube, 2102 inlet outer tube, 2103 flow path, 220 outlet tube, 230 housing, 2300 rear cover, 240 positioning groove, 250 positioning notch, 260 arrow, 400 Heart, 410 Aorta, 420 First Vessel, 440 Apex of Heart F 1st direction, S 2nd direction. DETAILED DESCRIPTION OF THE INVENTION

[0032] In order to make the above-mentioned objects, features, and advantages of the present application clearer and easier to understand, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, many specific details are set forth to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present application, so the present application is not limited by the specific examples disclosed below.

[0033] In the description of this application, the orientations or positional relationships indicated by terms such as "center," "longitudinal direction," "lateral direction," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial direction," "radial direction," and "circumferential direction" are orientations or positional relationships shown in the drawings, and are used only to facilitate or simplify the description of this application, and the devices or parts shown do not necessarily correspond to the orientations or positional relationships shown in the drawings. It should be understood that no particular orientation or specific orientation of structure and operation is intended to be expressed or implied, and as such should not be construed as limiting the present application.

[0034] Additionally, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply a relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature qualified as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of this application, unless explicitly and specifically limited, "plurality" means at least two, e.g., two, three, etc.

[0035] In this application, unless otherwise clearly specified or limited, the terms "attached," "coupled," "connected," "fixed," etc. should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, an internal communication between two elements, or an interactive relationship between two elements. Those skilled in the art can understand the specific meanings of the above terms in this application according to specific circumstances.

[0036] In this application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include direct contact between the first and second features, or indirect contact between the first and second features via an intermediate medium. Furthermore, a first feature being "above," "above," or "on the upper surface" of a second feature may include the first feature being directly above or diagonally above the second feature, or may simply indicate that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below," "below," or "on the lower surface" of a second feature may mean that the first feature is directly below or diagonally below the second feature, or may simply indicate that the horizontal height of the first feature is lower than that of the second feature.

[0037] It should be noted that when an element is "fixed" or "mounted" to another element, it may be directly connected to the other element, or a centrally located element may also be present. When an element is considered to be "connected" to another element, it may be directly connected to the other element, or a central element may also be present. The terms "vertical," "horizontal," "top," "bottom," "left," "right," and similar terms used herein are for descriptive purposes only and are not intended to be exclusive embodiments.

[0038] A ventricular assist device, also known as a blood pump, includes an inlet tube and an outlet tube. When implanted in the human body, the outlet tube is connected to the aorta via an artificial blood vessel, and the inlet tube is inserted into the ventricle through an opening on the apex of the heart. To fix the inlet tube relative to the heart, the ventricular assist device is usually connected to the heart by a ventricular connecting device.

[0039] In a related art, a ventricular assist device includes a skirt and a fixing ring, and the fixing ring includes a first half ring, a second half ring, and a threaded connecting member, and the first and second half rings can be surrounded to form a clamping channel for inserting an inlet tube of the ventricular assist device. One ends of the first and second half rings are connected to each other, and the other ends are connected by the threaded connecting member, and the threaded connecting member can rotate around its own axis, thereby moving the other ends of the first and second half rings closer to or farther from each other. In this way, by adjusting the radial dimension of the clamping channel, the tightening or loosening of the clamping channel relative to the inlet tube can be adjusted.

[0040] However, the ventricular assist device is implanted into the body through surgery, and the implantation procedure of the ventricular assist device is complicated, time-consuming, and difficult to operate, which increases the risk of surgery.

[0041] In the method for attaching and detaching the ventricular connecting device and ventricular assist device according to the embodiments of the present application, during the implantation process, the installation can be completed by simply inserting the inlet tube connected to the second connecting component into the first connecting component, thereby realizing plug-and-play, which is easy to operate, greatly saves surgical time, and reduces surgical risks.

[0042] Hereinafter, a ventricular connection device and a method for attaching and detaching a ventricular assist device according to an embodiment of the present invention will be described with reference to the drawings.

[0043] A first aspect of the present embodiment provides a ventricular connection device 100.

[0044] FIG. 1 is a schematic diagram of a connection structure between a ventricular connecting device 100 and a ventricular assist device 200 according to an embodiment of the present application; FIG. 2 is an exploded view of the ventricular connecting device 100 according to an embodiment of the present application; FIG. 3 is a structural schematic diagram of a second connecting component 20 in the ventricular connecting device 100 according to an embodiment of the present application; FIG. 4 is a schematic diagram of a connection structure between the ventricular connecting device 100 and a ventricular assist device 200 according to an embodiment of the present application; FIG. 5 is an exploded view of the second connecting component 20 in the ventricular connecting device 100 according to an embodiment of the present application; FIG. 6 is a structural schematic diagram of an elastic arm 23 in the ventricular connecting device 100 according to an embodiment of the present application; FIG. 8 is a schematic diagram of another structure of the second connection component 20 in the ventricular connection device 100 according to an embodiment of the present application; FIG. 9 is a cross-sectional view of the ventricular connection device 100 according to an embodiment of the present application; FIG. 10 is a schematic diagram of the structure of the ventricular connection device 100 according to an embodiment of the present application immediately after the first stopper portion 21 comes into contact with the first positioning portion 11; and FIG. 11 is a schematic diagram of the structure of the ventricular connection device 100 according to an embodiment of the present application when the second connection component 20 is attached to the first connection component 10.

[0045] 1, 4, and 9, the ventricular assist device 200 includes a housing 230, which is provided with an inlet tube 210 and an outlet tube 220. The inlet tube 210 includes an inner inlet tube 2101 and an outer inlet tube 2102 fitted around the inner inlet tube 2101. The inner inlet tube 2101 and the outer inlet tube 2102 may be connected by welding, and the welding position between the inner inlet tube 2101 and the outer inlet tube 2102 is located at the end of the inlet tube 210 in the insertion direction into the heart 400. A flow path 2103 that communicates with the interior of the ventricular assist device 200 is formed inside the inner inlet tube 2101.

[0046] The connection between the heart 400 and the ventricular assist device 200 will now be briefly described.

[0047] 1 shows an effect diagram after the ventricular assist device 200 is implanted in the heart 400, in which a first blood vessel 420 (which may be, for example, an artificial blood vessel or a natural blood vessel) has one end connected to the aorta 410 of the heart 400 and the other end connected to the outlet tube 220 of the ventricular assist device 200. A hole (not shown) is drilled at the apex 440 of the heart 400, and the inlet tube 210 of the ventricular assist device 200 is inserted into a ventricle of the heart 400 through the hole.

[0048] As shown in FIGS. 2, 3, 4, 6 and 9, a ventricular connection device 100 according to an embodiment of the present disclosure includes a first connection component 10 and a second connection component 20.

[0049] The first connection component 10 includes a first base 12 and a first positioning portion 11. A first through hole 121 is formed in the first base 12. The first positioning portion 11 is provided on the inner wall of the first through hole 121. Furthermore, the first connection component 10 further includes an annular skirt 13, which is connected to the first base 12 and surrounds the periphery of the first through hole 121.

[0050] 6 , the second connection component 20 includes a second base 213 and a first stopper portion 21. The second base 213 is connected to the ventricular assist device 200. The second base 213 has a second through-hole 221 formed therein for inserting the inlet tube 210 of the ventricular assist device 200. The first stopper portion 21 is connected to the second base 213, and the second connection component 20 is configured such that when a portion of the second base 213 is inserted into the first through-hole 221, the first stopper portion 21 and the first positioning portion 11 elastically engage with each other.

[0051] In this way, during the implantation process, the first connecting component is connected to the organ to be implanted, the inlet tube 210 connected to the second connecting component 20 is inserted into the first connecting component 10, and the first stopper portion 21 and the first positioning portion 11 are elastically engaged to complete the installation, thereby realizing plug-and-play, which is easy to operate, greatly saves surgical time, and reduces surgical risks.

[0052] Furthermore, the first stopper portion 21 includes a first position (not shown) in which it elastically deforms radially inward of the second through hole 221, and a second position in which it elastically returns radially outward of the second through hole 221.

[0053] As shown in Figure 11, when the second base 213 is attached to the first through hole 121, i.e., when a portion of the structure of the second base 213 is inserted into the first through hole 121, the first stopper portion 21 is located at the second position, and the first positioning portion 11 is provided on the end face of the first stopper portion 21 facing the first direction F, which is the direction opposite to the insertion direction of the second base 213.

[0054] As shown in FIGS. 10 and 11 , the first stopper portion 21 has a first position where it elastically deforms radially inward of the second through-hole 221 and a second position where it elastically returns radially outward of the second through-hole 221. Therefore, when the second base 213 is inserted into the first through-hole 121 of the first connection component 10 together with the inlet tube 210 of the ventricular assist device 200, if the first stopper portion 21 comes into contact with the first positioning portion 11, the first stopper portion 21 is elastically deformed radially inward of the second through-hole 221 by the pressure of the first positioning portion 11. and can be positioned at the first position, and after the first stopper portion 21 moves over the first positioning portion 11, the pressing force of the first positioning portion 11 against the first stopper portion 21 is released, and the first stopper portion 21 elastically returns radially outward of the second through-hole 221 to be positioned at the second position, and because the first positioning portion 11 is provided on the end surface of the first stopper portion 21 facing the first direction F, the second connection component 20, i.e., the ventricular assist device 200, can be prevented from slipping out of the first through-hole 121. In other words, during the implantation process, the installation can be completed by simply inserting the inlet tube 210 connected to the second connection component 20 into the first connection component 10, thereby realizing plug-and-play, which is easy to operate, greatly saves surgical time, reduces surgical risks, and has a small overall size after connection.

[0055] The second base 213 being connected to the ventricular assist device 200 means that the second base 213 may be fixed to the housing 230 of the ventricular assist device. The second base 213 may be made of, for example, a titanium alloy material. The ventricular assist device 200 may be, for example, a blood pump, or of course, other types of assist devices. The skirt 13 is made of a flexible material, for example, a polyester material or a polyethylene terephthalate material (PET).

[0056] In the present embodiment, for convenience of explanation, the direction in which the second connection component 20 is pulled out from the first connection component 10 (i.e., the direction in which the ventricular assist device 200 moves away from the first connection component 10) is defined as the first direction F, and the direction in which the second connection component 20 is pulled out from the first connection component 10 is defined as the The direction in which the ventricular assist device 200 is inserted into the first connection component 10 (i.e., the direction in which the ventricular assist device 200 approaches the first connection component 10) is defined as a second direction S.

[0057] The specific structure of the second connection component 20 will be described below.

[0058] As shown in Figures 3, 5 and 6, the second connection component 20 further includes an elastic arm 23, the first stopper portion 21 is connected to the elastic arm 23, and the elastic arm 23 is elastically deformable along the radial direction of the second through hole 221 so as to switch the first stopper portion 21 between the first position and the second position.

[0059] The second base 213 includes a first frame 222 and a second frame 223. The first frame 222 is configured in an annular shape such that a second through hole 221 is formed inside the first frame 222. The second frame 223 is fitted onto the circumferential outside of the first frame 222, a first retraction opening 2231 is formed in the second frame 223, a portion of the structure of the elastic arm 23 is located radially inside the second frame 223, and the first stopper portion 21 protrudes from the first retraction opening 2231 onto the outer surface of the second frame 223.

[0060] 3 and 6 , the opposing surfaces of the first frame 222 and the second frame 223 define a positioning cavity 2240, the positioning cavity 2240 communicates with the first retraction opening 2231, and the elastic arm 23 is housed in the positioning cavity 2240. This allows the first stopper portion 21 to protrude from the first retraction opening 2231 to the outside of the second frame 223, facilitating engagement between the first stopper portion 21 and the first positioning portion 11.

[0061] Naturally, in order to prevent the elastic arm 23 from coming out of the positioning cavity 2240, the second frame 223 is further provided with a sealing portion 2233 extending toward the inside of the first frame 222, and the sealing portion 2233 is annular and connected to the end of the second frame 223 facing toward the second direction S.

[0062] Furthermore, a second retraction opening 2232 is provided at a position corresponding to the first retraction opening 2231 of the first frame 222, and the dimension of the second retraction opening 2232 along the circumferential direction of the second through hole 221 is larger than the dimension of the first retraction opening 2231 along the circumferential direction of the second through hole 221. This makes it easier to ensure a space in which the first stopper portion 21 can move inward when the elastic arm 23 moves radially inward.

[0063] 5 and 6, the first frame 222 is further provided with a first anti-rotation groove 231, and the elastic arm 23 includes a first anti-rotation portion 232 that is inserted into the first anti-rotation groove 231. In this manner, it is possible to prevent the elastic arm 23 from rotating relative to the first frame 222. For example, the first anti-rotation portion 232 is a rotation-preventing sheet that extends from the elastic arm 23 in the first direction F. The first anti-rotation groove 231 is a shallow groove formed in the outer surface of the first frame 222.

[0064] In the embodiments of the present application, the number of first stopper portions 21 may be set to two, or of course, may be set to another number according to actual needs, and the same applies when there are multiple first stopper portions 21, and the explanation will be omitted here.

[0065] Of course, when the number of first stopper portions 21 is two, the number of second retraction openings 2232 is also two, and the two second retraction openings 2232 are arranged at an interval along the circumferential direction of the second through-hole 221. Of course, a stopper wall 224 is provided between the two second retraction openings 2232, and the elastic arm 23 is supported by being attached to the outer surface (arcuate surface) of the stopper wall 224. In this way, the positioning cavity 2240 is defined between the elastic arm 23 and the inner wall of the second frame 223. During installation, the elastic arm 23 is incorporated into the second frame 223 together with the first frame 222. Alternatively, in some other embodiments, the elastic arm 23 may first be attached to the second frame 223 through the first retraction opening 2231, and then the first frame 222 may be assembled.

[0066] Furthermore, the shape of the elastic arm 23 is configured to match the shape of the outer wall of the first frame 222, and the two first stopper portions 21 are connected to two opposing ends of the elastic arm 23. Illustratively, the elastic arm 23 may be arranged in a semi-ring shape.

[0067] 5 , the second frame 223 is provided with a second anti-rotation groove 2234, and the first frame 222 is provided with a second anti-rotation portion 2221 that is inserted into the second anti-rotation groove 2234. In a specific implementation, the second anti-rotation portion 2221 is a protrusion structure provided on an end of the first frame 222 facing the first direction F, and the number of second anti-rotation portions 2221 may be two, and the two second anti-rotation portions 2221 are aligned with the two second anti-rotation grooves 2234, respectively, so that the first frame 222 cannot rotate in the circumferential direction relative to the second frame 223.

[0068] 3, 5 and 11, an attachment groove 241 is further provided on the outer surface of the second frame 223, and a sealing ring 24 is provided in the attachment groove 241. The sealing ring 24 may be provided so as to protrude from the notch edge of the attachment groove 241, so as to be tightly fitted into the inner wall of the first through hole 121 of the first connection component 10, thereby performing a sealing function and preventing blood from leaking out of the ventricle. The opening edge of the first through hole 121 facing the first direction F is provided with a chamfered structure 1211. In this way, when the sealing ring 24 is attached in the attachment groove 241, the sealing ring 24 protruding from the surface of the second frame 223 can be more easily attached in the first through hole 121 when the second connection component 20 is inserted into the first through hole 121.

[0069] 10 and 11 , in the embodiment of the present application, the end face of the first stopper portion 21 facing the second direction S is formed as a slope 211, and the slope 211 is inclined radially inward of the second through hole 221. In this way, when the second connection component 20 is inserted into the first through hole 121 in the second direction S, the first stopper portion 21 serves as a guide when it comes into contact with the first positioning portion 11.

[0070] 7 and 8, connection openings 25 are formed in the first frame 222, and the number of connection openings 25, elastic arms 23, and first stopper portions 21 are the same and are provided in a one-to-one correspondence. One end of each elastic arm 23 is connected to the edge of the corresponding connection opening 25, and the other end is connected to the corresponding first stopper portion 21. In this way, when the first stopper portion 21 is pressed, the elastic arm 23 is driven to move radially inward of the second through hole 221.

[0071] Furthermore, second frame 223 is provided with second anti-rotation groove 2234, and first frame 222 is provided with second anti-rotation portion 2221 that is inserted into second anti-rotation groove 2234, thereby preventing circumferential rotation of first frame 222 and second frame 223. Second anti-rotation portion 2221 is provided on the edge of connection opening 25, and second anti-rotation portion 2221 corresponds to the position of first stopper portion 21 in the circumferential direction of second through hole 221.

[0072] In such an embodiment, the first frame 222 is formed into an overall spring ring structure, and after assembly, the first stopper portion 21 protrudes outside the second frame 223 through the first retraction opening 2231 provided in the second frame 223.

[0073] 2 , the first connecting component 10 further includes a second positioning portion 14, which is provided on the inner wall of the first through hole 121 and includes a plurality of internal tooth structures. The first stopper portion 21 is provided with an external tooth structure 212 that meshes with the internal tooth structure. In this way, when the second connecting component 20 is installed in the first through hole 121, the first stopper portion 21 and the second positioning portion 14 mesh with each other, preventing relative rotation between the second connecting component 20 and the first connecting component 10.

[0074] Furthermore, as shown in FIG. 4, the fourth frame 124 is further provided on its outer periphery with first outer tooth structures 1247 which are used for circumferential clamping in combination with a dedicated surgical instrument.

[0075] 3 and 9 , when assembling the second frame 223 and the housing 230, a positioning groove 240 may be formed in the housing 230, and the inner contour dimensions of the positioning groove 240 may match the end of the second frame 223 facing the first direction F. In this way, the end of the second frame 223 facing the first direction F may be accommodated in the positioning groove 240. Furthermore, a positioning boss 2230 may be formed in the end of the second frame 223 facing the first direction F, and a positioning notch 250 may be formed in the position of the positioning groove 240 corresponding to the positioning boss 2230. In this way, the combination of the positioning boss 2230 and the positioning notch 250 can achieve accurate positioning of the second frame 223 and the housing 230. At this time, the second frame 223 may be welded to the housing 230. Next, the inlet outer pipe 2102 is fitted over the inlet inner pipe 2101, thereby welding the inlet outer pipe 2102 to the end of the inlet inner pipe 2101 facing the second direction S.

[0076] FIG. 12 is a structural schematic diagram of the first connection component 10 in the ventricular connection device 100 according to an embodiment of the present application, FIG. 13 is a structural schematic diagram of the first connection component 10 in the ventricular connection device 100 according to an embodiment of the present application, viewed from another angle, FIG. 14 is an exploded view of the first connection component 10 in the ventricular connection device 100 according to an embodiment of the present application, FIG. 15 is a cross-sectional view of the first connection component 10 in the ventricular connection device 100 according to an embodiment of the present application, and FIG. 16 is a structural schematic diagram of the first connection component 10 in the ventricular connection device 100 according to an embodiment of the present application, viewed from another angle.

[0077] As shown in FIGS. 11 , 12 , and 14 , the first positioning portion 11 includes a plurality of positioning segments 111, which are spaced apart along the circumferential direction of the first through-hole 121, and the number of first stoppers 21 is plural. When the second base 213 is attached to the first through-hole 121, each positioning segment 111 is provided in one-to-one correspondence with an end face of the first stopper 21 facing the first direction F. The gap between adjacent positioning segments 111 forms a passage 1111 through which the first stopper 21 passes. In this manner, when removing the ventricular assist device 200, i.e., when withdrawing the second connection component 20 from the first connection component 10, the second connection component 20 can be withdrawn simply by rotating the second connection component 20 until the first stopper 21 is aligned with the passage 1111.

[0078] 14 and 15, the first base 12 includes a third frame 123 and a fourth frame 124. The third frame 123 has an annular structure, and the first through-hole 121 is formed inside the third frame 123. The fourth frame 124 is fitted onto the outer periphery of the third frame 123, and the skirt 13 is connected to the third frame 123.

[0079] Furthermore, the first base 12 further includes an annular crimping member 15, which is connected to an end of the fourth frame 124 facing the second direction S and extends radially outward from the first through hole 121 to the outside of the fourth frame 124, and at least a portion of the skirt 13 is structured as follows: , and is placed on the crimping member 15. This allows the skirt 13 to be well supported.

[0080] In an embodiment of the present application, as shown in Figures 14 and 15, the end of the fourth frame 124 facing the second direction S is provided with a plurality of piercing portions 1241 arranged at intervals along the circumferential direction of the first through hole 121, and third through holes 1242 are formed at positions corresponding to each piercing portion 1241 of the crimping member 15, and each piercing portion 1241 is inserted into the skirt 13 through the corresponding third through hole 1242.

[0081] Furthermore, a flange portion 125 is provided on the end of the third frame 123 facing the second direction S, and the skirt 13 is sandwiched between the flange portion 125 and the crimping member 15. To more effectively crimp the skirt 13, a press strip portion 1251 can be provided on the end surface of the flange portion 125 facing the first direction F. The press strip portion 1251 and the crimping member 15 can be fitted together to more firmly fasten the skirt 13. Furthermore, if a good seal is not established between the apex hole and the inlet tube 210, blood will continuously flow along the interface and into the area of ​​the ventricular connection device 100. Therefore, good sealing of the ventricular connection device 100 is particularly important. In this way, the present invention achieves a good seal between the skirt 13 and the first base 12, improving product safety.

[0082] Regarding the connection between the third frame 123 and the fourth frame 124, as shown in Figures 14 and 16, for example, the third frame 123 may include a locking block 1231 provided on its outer peripheral surface, and retraction grooves are formed on the inner peripheral sides of the crimping member 15 and the fourth frame 124. For example, a first retraction groove 151 is formed in the crimping member 15, a second retraction groove 152 is formed in the fourth frame 124, and an engagement groove 1243 is further formed in the fourth frame 124. The engagement groove 1243 is connected to the second retraction groove 152 in the fourth frame 124, and the locking block 1231 engages with the engagement groove 1243 via the second retraction groove 152 of the crimping member 15 and the fourth frame 124. The engagement groove 1243 supports the locking block 1231 in the axial direction and prevents the third frame 123 from coming off in the axial direction.

[0083] A first countersunk groove 1232 is provided on the end face of the fourth frame 124 facing the first direction F, and a second countersunk groove 1233 is provided on the end face of the locking block 1231 facing the first direction F. When the locking block 1231 engages with the engagement groove 1243, the first countersunk groove 1232 and the second countersunk groove 1233 join together to form a complete countersunk groove, and the fastener 1234 is screwed into the complete countersunk groove, thereby preventing relative rotation between the fourth frame 124 and the locking block 1231, that is, preventing relative rotation between the fourth frame 124 and the third frame 123.

[0084] FIG. 17 is a schematic diagram of another structure of the first connection component 10 in the ventricular connection device 100 according to an embodiment of the present application, FIG. 18 is a cross-sectional view of another structure of the first connection component 10 in the ventricular connection device 100 according to an embodiment of the present application, and FIG. 19 is a schematic diagram of the ventricular connection device 100 according to an embodiment of the present application from another angle.

[0085] 17 and 18, in another possible embodiment, the fourth frame 124 is provided with a plurality of fourth through holes 1245, which are spaced apart in the circumferential direction of the first through hole 121, and the skirt 13 is fixed to the fourth through holes 1245 with sewing thread. A wiring hiding hole is provided at the end of the fourth through hole 1245 facing the first direction F.

[0086] Furthermore, the first positioning portion 11 is provided on the inner wall of the fourth frame 124 and is located at the end of the fourth frame 124 facing the first direction F.

[0087] In this embodiment, the crimping member 15 and the fourth frame 124 are fixed by welding (for example, laser welding), and exemplarily, the crimping member 15 is configured as an annular member, and the inner circumferential side of the crimping member 15 is connected to an end face of the fourth frame 124 facing the second direction S and fixed by laser welding. A first weld seam 153 is formed on the inner circumferential side of the crimping member 15.

[0088] The fourth frame 124 and the third frame 123 are also fixed by welding, and the second weld seam 154 between them is located at the boundary between the fourth frame 124 and the third frame 123. As described above, the skirt 13 is fixed to the fourth frame 124 by sewing threads, and in a specific implementation, the sewing threads pass through each of the fourth through holes 1245 and are located in the wiring hiding grooves 1246, thereby ensuring that the sewing threads do not rise higher than the end face of the fourth frame 124 facing the first direction F.

[0089] FIG. 20 is a structural schematic diagram of the plug 30 in the ventricular connection device 100 according to an embodiment of the present application, FIG. 21 is a cross-sectional view of the plug 30 in the ventricular connection device 100 according to an embodiment of the present application, and FIG. 22 is a structural schematic diagram of the plug 30 in the ventricular connection device 100 according to an embodiment of the present application attached to the first connection component 10.

[0090] 20, 21 and 22, in the present embodiment, the ventricular connection device 100 further includes a plug 30. The plug 30 includes a plug base 31 and a bung 32.

[0091] The plug base 31 includes a base body 310 and an insertion part 311. The second connection component 20 is connected to the insertion part 311, and the insertion part 311 is inserted into the second through hole 221. The plug 32 is fitted into the insertion part 311 and arranged sequentially along the axial direction of the second through hole 221 together with the second connection component 20. The second frame 223 of the second connection component 20 can be connected to the base body 310 by welding, forming a third weld seam 323.

[0092] Furthermore, the plug 32 includes a plug body 321 and a cover 322 that covers the outside of the plug 32, and the cover 322 has a plurality of pores. The cover 322 may be manufactured by a process such as sintering or plasma spraying.

[0093] When the plug 30 is inserted into the first connection component 10, the first stopper portion 21 is stopped by the first positioning portion 11 and therefore will not come off the first connection component 10. At this time, the plug 32 is inserted into the apex 440 of the heart, and myocardial tissue and endothelial cells can grow into the pore structure of the cover 322 to improve blood compatibility.

[0094] The plug 32 and the plug base 31 may be fixed by welding. For example, an insertion hole 3111 may be provided at the top of the insertion portion 311, a part of the structure of the plug body 321 may be inserted into the insertion hole 3111, and a fourth weld seam 324 may be formed at the boundary between the plug body 321 and the hole wall of the insertion hole 3111.

[0095] 13, 19, 20, and 21, a pair of protrusions 3101 are formed on the base body 310, and the positions of the pair of protrusions 3101 in the circumferential direction of the second through hole 221 correspond to the first stopper portions 21. A pair of marker portions 131 are formed on the skirt 13, and the positions of the marker portions 131 in the circumferential direction of the first through hole 121 correspond to the positions of the passages 1111. When it is necessary to pull out the plug 30 from the first connection component 10, the plug 30 is rotated relative to the first connection component 10 until the pair of first protrusions 3101 are aligned with the pair of marker portions 131, respectively. As a result, the passages 1111 are aligned with the first stopper portions 21 in the circumferential direction of the first through hole 121, and at this time, the plug 30 can be pulled out. 22, when the plug 30 is attached to the first connection component 10, the pair of marking portions 131 and the pair of protrusions 3101 are offset from each other in the circumferential direction.

[0096] 10 and 11 , when the inlet pipe 210 is inserted into the first through-hole 121 of the first connection component 10 together with the second connection component 20, the first positioning portion 11 comes into contact with the inclined surface 211 of the first stopper portion 21. As the inlet pipe 210 continues to be inserted, the second connection component 20 is subjected to a force F1. This force F1 generates a component force F2 on the inclined surface 211, causing the first stopper portion 21 to elastically deform the elastic arm 23 and displace inward to the first position. When the inlet pipe 210 continues to be pressed, the first stopper portion 21 overcomes the first positioning portion 11, and the force F2 applied to the first stopper portion 21 is released. The elastic force of the elastic arm 23 causes the first stopper portion 21 to suddenly jump outward and hit the internal tooth structure of the second positioning portion 14 of the third frame 123, generating a loud noise.

[0097] At this time, the end face of the first stopper part 21 facing the first direction F is stopped in the axial direction by the first positioning part 11, thereby connecting the ventricular assist device 200 and the ventricular connecting device 100 without axial separation, thereby achieving the object of the present application. The seal ring 24 is located in the mounting groove 241 of the fourth frame 124 and is press-fitted against the inner wall of the third frame 123, sealing the gap between the ventricular assist device 200 and the ventricular connecting device 100 and preventing blood from leaking out of the blood pump through the outer periphery of the inlet tube 210.

[0098] 2, the second positioning element 14 is provided as an internal tooth structure, and the first stopper element 21 is provided as an external tooth structure 212, which are interlocked to prevent the ventricular assist device 200 from rotating axially relative to the ventricular connection device 100. When the angle of the ventricular assist device 200 needs to be adjusted relative to the ventricular connection device 100, the first external tooth structure 1247 on the outer wall of the fourth frame 124 can be grasped with a dedicated surgical instrument, and the ventricular assist device 200 can be manually grasped and torque applied along the axis. At this time, the interlocking second positioning element 14 presses the external tooth structure 212 on the first stopper element 21, elastically deforming the elastic arm 23 and causing the first stopper element 21 to retract inward, thereby realizing relative rotation.

[0099] After the ventricular assist device 200 is implanted in the heart 400, it is usually necessary to rotate the ventricular assist device 200 to adjust its angle to allow smoother blood flow in the first blood vessel 420, and during the surgical procedure, the surgeon may need to insert and remove the ventricular assist device 200 multiple times. The ventricular connection device 100 of the present application allows the ventricular assist device 200 to be freely rotated to adjust its angle and is also easy to remove quickly, thereby facilitating the surgeon's operation and saving surgical time.

[0100] As shown in Figures 14 and 19, when it is necessary to remove the ventricular assist device 200 from the ventricular connection device 100, the ventricular connection device 100 is grasped with a dedicated surgical instrument and rotated by hand until the two arrows 260 on the rear cover 2300 of the blood pump are aligned with the two markings 131 on the skirt 13. At this time, the first stopper portion 21 moves to the position of the passage 1111, and the ventricular assist device 200 can be removed by pulling it out with force.

[0101] As shown in FIG. 11, after the second connection component 20 is inserted into the first through-hole 121, a portion of the structure of the second frame 223 is stopped by the fourth frame 124, and therefore does not continue to move toward the heart 400 in the second direction S.

[0102] Of course, the groove opening edge of the attachment groove 241 may be stopped by the first positioning portion 11, so that the second frame 223 does not continue to move in the second direction S toward the heart 400 side.

[0103] Alternatively, the housing 230 may abut against the fourth frame 124 to restrict the second frame 223 from moving in the second direction S toward the heart 400.

[0104] FIG. 23 is a flowchart of a method for attaching and detaching a ventricular assist device 200 according to an embodiment of the present disclosure.

[0105] 1 and 23, a second aspect of the present invention provides a method for attaching and detaching a ventricular assist device 200, which is implanted in or removed from a heart 400 by the ventricular connection device 100 in the above-described embodiment. The structure, function, and operating principle of the ventricular assist device 200 have been described in detail above, and will not be described again here.

[0106] A method for attaching and detaching the ventricular assist device 200 according to an embodiment of the present application includes: a step S10 of suturing the skirt to the surface of the heart and drilling a hole at a position on the heart corresponding to the first through-hole; providing a ventricular assist device having a second connection component connected thereto; and step S30 of passing the inlet tube of the ventricular assist device through the first through-hole and the hole together with a part of the structure of the second base until the first stopper portion and the first positioning portion are elastically engaged.

[0107] Furthermore, the step of passing the inlet tube of the ventricular assist device through the first through-hole and the hole together with a part of the structure of the second base until the first stopper portion and the first positioning portion are elastically engaged with each other specifically includes: The method includes a step of passing the inlet tube of the ventricular assist device through the first through-hole and hole together with a portion of the structure of the second base, causing the first stopper portion to pass over the first positioning portion and engage with an end surface of the first positioning portion facing a second direction opposite to the first direction.

[0108] Furthermore, as shown in FIG. 1, in step S10, before suturing the skirt 13 to the surface of the heart 400, The method further includes connecting one end of a first blood vessel 420 to the aorta 410 of the heart 400 and the other end to the outlet tube 220 of the ventricular assist device 200 .

[0109] Furthermore, as described above, the ventricular connection device 100 further includes the plug 30 , to which the second connection component 20 is connected, and a portion of the structure of the plug 30 is inserted into the second through-hole 221 .

[0110] The first positioning portion 11 includes a plurality of positioning segments 111, which are arranged at intervals along the circumferential direction of the first through hole 121, and the intervals between adjacent positioning segments 111 form a passage 1111 for the first stopper portion 21 to pass through.

[0111] The method of attaching and detaching the ventricular assist device 200 is as follows: driving the ventricular assist device 200 to rotate the second connection component 20 until the first stop portion 21 is aligned with the passage 1111, and removing the ventricular assist device 200; providing a plug 30 provided with the second connection component 20; The method further includes a step of inserting the plug 30 together with the second connection component 20 into the first through hole 121, causing the first stopper portion 21 to pass over the first positioning portion 11 and engage with the end face of the first positioning portion 11 facing in a second direction S opposite to the first direction F.

[0112] In some embodiments of the present disclosure, the method further comprises rotating the ventricular assist device 200 until the first stop 21 is aligned with the passageway 1111, and then removing the ventricular assist device 200. , The method further includes the step of isolating the first blood vessel 420 from the aorta 410 of the heart 400 and closing the opening in the aorta 410.

[0113] Hereinafter, a specific example will be given to explain the method of implanting and removing the ventricular connection device 100 according to the embodiment of the present application.

[0114] The embedding method includes the following steps 1 to 4.

[0115] In step 1, one end of a first blood vessel 420 is connected to the aorta 410 of the heart 400 and the other end is connected to the outlet tube 220 of the ventricular assist device 200 .

[0116] In step 2, after the skirt 13 is sutured to the apex 440 , a hole is drilled in the apex 440 along the first through-hole 121 of the first connection component 10 .

[0117] Step 3 provides a ventricular assist device with the second connection component 20 connected thereto.

[0118] In step 4, the inlet tube 210 of the ventricular assist device 200 is passed through the first through-hole 121 and the hole and inserted toward the ventricle, causing the first stopper portion 21 to climb over the first positioning portion 11 (a sound is emitted at the moment of climbing over, indicating that the device has been attached to the specified position), and engage with the end face of the first positioning portion 11 facing the second direction S. At this time, as shown in Figure 4, the connection between the ventricular assist device 200 and the ventricular connecting device 100 is completed, i.e., the connection between the ventricular assist device 200 and the heart 400 is completed.

[0119] If it is necessary to remove the ventricular assist device after the patient's natural heart 400 has recovered its function, the removal method includes the following steps 1 to 4.

[0120] In step 1, a first blood vessel 420 is separated from the aorta 410 of the heart 400 and the opening of the aorta 410 is closed.

[0121] In step 2, a plug 30 provided with a second connection component 20 is provided.

[0122] In step 3, the ventricular assist device 200 is driven to rotate the second connection component 20 until the first stop portion 21 is aligned with the passage 1111, and the ventricular assist device 200 is removed.

[0123] In step 4, the plug 30 is inserted into the first through hole 121 together with the second connection component 20, and the first stopper portion 21 is caused to pass over the first positioning portion 11 and engage with the end face of the first positioning portion 11 facing the second direction S.

[0124] The technical features of the above-described embodiments can be combined in any manner, and for the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described, but as long as there is no contradiction in the combination of these technical features, they should be considered within the scope described in this specification.

[0125] The above examples only describe some embodiments of the present application, and although the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent of the present application. Those skilled in the art may make various modifications and improvements without departing from the spirit of the present application, and all of these fall within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application should be determined based on the scope of the accompanying claims.

Claims

1. 1. A ventricular connection device comprising a first connection component and a second connection component, The first connection component is a first base having a first through hole formed therein; a first positioning portion provided on an inner wall of the first through hole, The second connection component is a second base configured to be connected to a ventricular assist device, the second base having a second through-hole formed therein for insertion of an inlet tube of the ventricular assist device; a first stopper portion connected to the second base, When a partial structure of the second base is inserted into the first through-hole, the first stopper portion and the first positioning portion are elastically engaged with each other.

2. the first stopper portion includes a first position where it is elastically deformed toward the radially inward direction of the second through hole and a second position where it is elastically returned to the radially outward direction of the second through hole, 2. The ventricular connection device according to claim 1, wherein when a portion of the second base is inserted into the first through-hole, the first stopper portion is located at the second position, the first positioning portion is provided on an end surface of the first stopper portion facing a first direction, and the first direction is a direction opposite to an insertion direction of the second base.

3. the second connection component further includes an elastic arm, the first stopper portion is connected to the elastic arm, and the elastic arm is elastically deformable along a radial direction of the second through hole so as to switch the first stopper portion between the first position and the second position; The second base is a first frame configured in an annular shape with the second through hole formed inside; a second frame fitted around the first frame in the circumferential direction and having a first retraction opening formed therein; 3. The ventricle connection device according to claim 2, wherein a portion of the elastic arm is located radially inside the second frame, and the first stopper protrudes from the first retraction opening to an outer surface of the second frame.

4. 4. The ventricular connection device according to claim 3, wherein opposing surfaces of the first frame and the second frame define a positioning cavity, the positioning cavity communicating with the first retraction opening, and the resilient arm being housed within the positioning cavity.

5. 5. The ventricle connection device according to claim 4, wherein a second retraction opening is provided in the first frame at a position corresponding to the first retraction opening, and a dimension of the second retraction opening along the circumferential direction of the second through-hole is larger than a dimension of the first retraction opening along the circumferential direction of the second through-hole.

6. 5. The ventricle connection device according to claim 4, wherein the first frame is provided with a first anti-rotation groove, and the elastic arm includes a first anti-rotation portion that is inserted into the first anti-rotation groove.

7. 7. The ventricular connection device according to claim 6, wherein the number of the first stopper portions is two, the shape of the elastic arm is configured to match the shape of the outer wall of the first frame, and the two first stopper portions are connected to two opposing ends of the elastic arm.

8. a connecting opening is formed in the first frame, and the numbers of the connecting opening, the elastic arm, and the first stopper portion are the same and are provided in one-to-one correspondence; Each of the elastic arms has one end connected to the edge of the corresponding connection opening and the other end connected to the corresponding front end.

4. The ventricular connection device according to claim 3, which is connected to the first stopper portion.

9. a second anti-rotation groove is provided in the second frame, and a second anti-rotation portion is provided in the first frame and is inserted into the second anti-rotation groove; 4. The ventricle connection device according to claim 3, wherein the second anti-rotation portion is provided on an edge portion of the connection opening, and the second anti-rotation portion corresponds to a position of the first stopper portion in a circumferential direction of the second through-hole.

10. 10. The ventricle connection device according to claim 3, wherein an end surface of the first stopper portion facing the second direction is formed as a slope, and the slope is inclined radially inward of the second through-hole.

11. the first positioning portion includes a plurality of positioning segments, the plurality of positioning segments are arranged at intervals in a circumferential direction of the first through hole, and the number of the first stopper portions is plural, When the second base is attached to the first through hole, the positioning segments are provided in one-to-one correspondence with end surfaces of the first stopper portions facing the first direction, The ventricular connection device according to any one of claims 3 to 9, wherein a gap between adjacent positioning segments forms a passage for a first stopper portion to pass through.

12. 10. The ventricular connection device according to claim 3, wherein the first connection component further includes a second positioning portion, the second positioning portion being provided on an inner wall of the first through-hole and including a plurality of internal tooth structures, and the first stopper portion being provided with an external tooth structure that meshes with the internal tooth structures.

13. the first connection component further includes an annular skirt, the skirt being connected to the first base and surrounding the first through hole; The first base is a third frame configured in an annular shape with the first through hole formed inside; The ventricular connection device according to any one of claims 3 to 9, further comprising: a fourth frame fitted onto an outer periphery of the third frame, the fourth frame having the skirt connected to the third frame.

14. the first base further includes an annular crimping member, the crimping member is connected to an end of the fourth frame facing a second direction and extends radially outward from the fourth frame toward the first through hole, the second direction being opposite to the first direction; 14. The ventricular connection device of claim 13, wherein at least a portion of the structure of the skirt rests on the crimp member.

15. 15. The ventricular connection device according to claim 14, wherein an end of the fourth frame facing the second direction is provided with a plurality of piercing portions spaced apart in a circumferential direction of the first through hole, and third through holes are formed at positions corresponding to the piercing portions of the crimping member, and each of the piercing portions is inserted into the skirt through a corresponding third through hole.

16. 16. The ventricular connection device according to claim 15, wherein the third frame has a flange portion at an end facing the second direction, and the skirt is sandwiched between the flange portion and the crimping member.

17. the third frame includes a locking block provided on an outer peripheral surface, and a retraction groove is provided on the inner peripheral side of the crimping member and the fourth frame; the fourth frame is further formed with an engagement groove, the engagement groove being in communication with the retraction groove of the fourth frame; 15. The ventricular connection device according to claim 14, wherein the locking block is engaged with the engagement groove via the retraction groove in the crimping member and the retraction groove in the fourth frame.

18. a plurality of fourth through holes are provided in the fourth frame, and the plurality of fourth through holes are arranged at intervals along a circumferential direction of the first through hole; 15. The ventricular connection device of claim 14, wherein the skirt is secured to the fourth thru-hole by a suture.

19. 19. The ventricular connection device according to claim 18, wherein the first positioning portion is provided on an inner wall of the fourth frame and is located at an end of the fourth frame facing in a first direction.

20. further comprising a plug; The plug is a plug base including an insertion portion, the second connection component being provided on an outer side of the insertion portion, and the insertion portion being inserted into the second through hole; 10. The ventricular connection device according to claim 1, further comprising: a plug fitted in the insertion portion and arranged sequentially along the axial direction of the second through-hole together with the second connection component.

21. 21. The ventricular connection device of claim 20, wherein the plug includes a plug body and a cover that covers the outside of the plug, the cover having a plurality of pore structures.

22. A method for attaching and detaching a ventricular assist device, wherein the ventricular assist device is implanted in or removed from a heart by a ventricular connection device according to any one of claims 1 to 21, wherein the first connection component further includes an annular skirt, the skirt being connected to the first base; The method comprises: suturing the skirt to the surface of the heart and drilling a hole on the heart at a position corresponding to the first through-hole; providing the ventricular assist device having the second connection component connected thereto; A method for attaching and detaching a ventricular assist device, comprising: a step of passing an inlet tube of the ventricular assist device through the first through-hole and the hole together with a part of the structure of the second base until the first stopper portion and the first positioning portion elastically engage with each other.

23. Prior to suturing the skirt to the surface of the heart, the method comprises:

23. The method of attaching and detaching a ventricular assist device of claim 22, further comprising the step of connecting one end of a first blood vessel to an aorta of the heart and the other end to an outlet tube of the ventricular assist device.

24. the ventricular connection device further includes a plug, the second connection component is connected to the plug, and a portion of the plug structure is inserted into the second through-hole; the first positioning portion includes a plurality of positioning segments, the plurality of positioning segments being arranged at intervals along a circumferential direction of the first through hole, and the intervals between adjacent positioning segments form a passage for the first stopper portion to pass through; The method comprises: Providing a plug provided with a second connection component; driving the ventricular assist device to rotate the second connection component until the first stop portion is aligned with the passageway, and removing the ventricular assist device; The plug is inserted into the first through-hole together with the second connection component, and the first stopper portion is made to pass over the first positioning portion.

24. The method of claim 22 or 23, further comprising the step of: engaging an end surface facing in a second opposite direction.

25. Rotating the ventricular assist device until the first stop is aligned with the passageway and prior to the step of removing the ventricular assist device, the method further comprises:

25. The method of attaching and detaching a ventricular assist device of claim 24, further comprising the steps of: disconnecting a first blood vessel from an aorta of the heart and occluding an opening in the aorta.

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