CN117899352A

CN117899352A - Ventricular connection device and ventricular connection system

Info

Publication number: CN117899352A
Application number: CN202410317304.4A
Authority: CN
Inventors: 马云善; 刘思汗
Original assignee: Suzhou Tongxin Medical Technology Co ltd
Current assignee: Suzhou Tongxin Medical Technology Co ltd
Priority date: 2024-03-20
Filing date: 2024-03-20
Publication date: 2024-04-19

Abstract

The application relates to a ventricular connecting device and a ventricular connecting system, which are beneficial to improving the connecting efficiency of a ventricular assist device, thereby reducing the operation time and further reducing the operation risk. A ventricular connection device for connecting a ventricular assist device to a heart, the ventricular assist device including an upper housing and an inlet tube in communication with a top portion of the upper housing, the ventricular connection device comprising: the connecting piece is configured to be sleeved on the inlet pipe and connected with the upper shell; and the base structure is used for being connected with the heart and comprises a locking component sleeved outside the connecting piece, the locking component is provided with a first locking state and a first unlocking state, the locking component is fixedly connected with the connecting piece in the first locking state, and the connecting piece can rotate relative to the locking component and move relative to the locking component in the first unlocking state.

Description

Ventricular connection device and ventricular connection system

Technical Field

The application relates to the field of medical equipment, in particular to a ventricular connecting device and a ventricular connecting system.

Background

A blood pump or a called ventricular assist device for providing mechanical support for the blood circulation of patients with refractory heart failure in the advanced stage, i.e. transitional treatment before heart transplantation or recovery of heart function and long-term treatment. The blood pump is connected with the ventricle and the aorta of the patient in a parallel bypass mode, the inlet pipe of the blood pump is inserted into the ventricle from the heart apex, the impeller of the blood pump is driven by power to work, so that blood enters the pump cavity from the ventricle through the pump inlet, and under the centrifugal effect of the impeller, the blood is discharged from the pump outlet and then flows to the ascending aorta through the bridged artificial blood vessel, thereby supporting the blood circulation of the patient.

In blood pump implantation procedures, it is often necessary to use a ventricular assist device to fixedly mount the ventricular assist device to biological tissue. However, in the related art, the ventricular attachment device and the ventricular assist device are fixed together, which requires redundant operation steps. These actions reduce the efficiency of the connection and extend the surgical time, thus increasing the surgical risk.

Disclosure of Invention

Based on the above-mentioned problems, the present application provides a ventricular connection device and a ventricular connection system, which are beneficial to improving the connection efficiency of a ventricular assist device, thereby reducing the operation time and further reducing the operation risk.

An embodiment of a first aspect of the present application proposes a ventricular attachment device for connecting a ventricular assist device to a heart, the ventricular assist device comprising an upper housing and an inlet tube in communication with a top portion of the upper housing, the ventricular attachment device comprising: the connecting piece is configured to be sleeved on the inlet pipe and connected with the upper shell; and the base structure is used for being connected with the heart and comprises a locking component sleeved outside the connecting piece, the locking component is provided with a first locking state and a first unlocking state, the locking component is fixedly connected with the connecting piece in the first locking state, and the connecting piece can rotate relative to the locking component and move relative to the locking component in the first unlocking state.

In some embodiments, the outer surface of the connecting piece is provided with a plurality of first positioning grooves at intervals along the circumferential direction, the locking assembly comprises at least one ball, a connecting ring sleeved outside the connecting piece and an outer ring sleeved outside the connecting ring, the connecting ring is provided with at least one first through hole penetrating along the radial direction of the connecting ring, the inner wall of the outer ring is provided with a first abutting piece opposite to the first through hole, the first abutting piece is provided with a first contact surface and a second contact surface positioned on at least one side of the first contact surface, the second contact surface is connected with the first contact surface and extends towards the direction approaching the inner wall of the outer ring, the outer ring is rotatably connected with the connecting ring, so that the locking assembly is switched between a first locking state and a first unlocking state, and in the first locking state, the ball is positioned in the first through hole and abuts against the first contact surface and the first positioning groove respectively; in the first unlocking state, the ball is located in the first through hole and abuts against the second contact surface.

In some embodiments, the connecting ring is provided with three first through holes at intervals along the circumferential direction thereof, the inner wall of the outer ring is provided with three first abutments opposite to the three first through holes, and the number of the balls is the same as the number of the first through holes.

In some embodiments, the outer wall of the connecting ring is provided with a first mating portion, the upper surface of the first mating portion is provided with a groove, the inner wall of the outer ring is provided with a second mating portion attached to the upper surface of the first mating portion, the second mating portion is provided with a fracture opposite to the groove, the groove and the fracture jointly form a first accommodating cavity, and the locking assembly further comprises an elastic element arranged in the first accommodating cavity.

In some embodiments, the base structure further comprises a seaming assembly comprising a press ring connected to the upper surface of the connecting ring, a seaming skirt located between the inner ring and the press ring, and an inner ring connected to the inner surface of the connecting ring.

In some embodiments, at least one limiting portion is circumferentially spaced from the outer wall of the connecting ring, the limiting portion being located on one side of the first through hole, the limiting portion being configured to define a rotational angle of the outer ring relative to the connecting ring.

In some embodiments, at least one first protrusion is disposed on a surface of the pressing ring, which is close to the connecting ring, and the first protrusion and the limiting portion are disposed in a staggered manner, so that the pressing ring and the connecting ring are circumferentially fixed.

In some embodiments, the inner wall of the connecting ring is provided with a first connecting groove along the circumferential direction, the outer surface of the inner ring is provided with a second connecting groove opposite to the first connecting groove, and the base structure further comprises a snap ring, wherein the snap ring is located between the first connecting groove and the second connecting groove, so that the inner ring and the connecting ring are axially fixed.

In some embodiments, at least one second protrusion is circumferentially arranged on the outer surface of the inner ring, a first limit groove matched with the second protrusion is arranged on the inner wall of the connecting ring, and the second protrusion is matched with the first limit groove so that the inner ring and the connecting ring are circumferentially fixed.

In some embodiments, a plurality of second positioning grooves are circumferentially arranged on the outer surface of the connecting piece at intervals, the second positioning grooves are located above the first positioning grooves, the locking assembly further has a second locking state, the outer ring is rotatably connected with the connecting ring, so that the locking assembly is switched between the second locking state and the first unlocking state, and in the second locking state, the balls are located in the first through holes and respectively abutted against the first contact surface and the second positioning grooves.

An embodiment of the second aspect of the present application provides a ventricular connection system, including a ventricular assist device and a ventricular connection device according to the first aspect, where the ventricular assist device includes an upper housing and an inlet pipe that is communicated with a top of the upper housing, and the connection piece is sleeved on the inlet pipe and connected with the upper housing.

According to the ventricular connecting device, the connecting piece is fixedly connected with the ventricular assist device before an operation. The integrated structure of the connector and the ventricular assist device is then inserted into the base structure. The locking assembly in the base structure is also switchable between a first locked state and a first unlocked state. When the locking component is in the first locking state, the ventricular assist device and the ventricular connecting device are fixedly connected, and rotation or axial movement cannot occur between the ventricular assist device and the ventricular connecting device, so that the ventricular assist device is connected with the natural heart. When the locking assembly is in the first unlocking state, the connecting piece can drive the ventricular assist device to rotate relative to the base structure and can drive the ventricular assist device to be separated from or inserted into the base structure. In this way, a relative rotation and axial insertion and extraction between the ventricular assist device and the ventricular connection device is achieved. Thus, in the first aspect, the ventricular assist device can be quickly connected or disconnected without fastening or unfastening the ventricular assist device and the ventricular connecting device by using a tool, so that the operation time can be greatly shortened, and the operation risk is reduced. In a second aspect, a relative rotation between the ventricular assist device and the ventricular attachment device is also achieved, so that the angle of the outlet of the ventricular assist device can be adjusted at any time. Therefore, the convenience of operation can be further improved, further the operation time is further saved, and the operation risk is reduced.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a ventricular assist device according to an embodiment of the present application implanted in a heart via a ventricular connection device;

FIG. 2 is an exploded view of a ventricular assist device and a ventricular connection device according to an embodiment of the application;

FIG. 3 is a schematic view showing an exploded structure of the connection between the upper housing of the ventricular assist device and the connector of the ventricular connection device according to the embodiment of the present application;

FIG. 4 is a schematic cross-sectional view of a locking assembly according to an embodiment of the present application in a first locked state;

FIG. 5 is a schematic view of the base structure of the ventricular connecting device according to an embodiment of the present application;

FIG. 6 is an exploded view of the base structure of the ventricular connection device according to an embodiment of the present application at a first viewing angle;

FIG. 7 is a schematic view of a connection ring of a base structure according to an embodiment of the present application;

FIG. 8 is a schematic view of the outer ring of the base structure according to an embodiment of the present application;

FIG. 9 is a schematic top view of a locking assembly according to an embodiment of the present application in a first locked state;

FIG. 10 is a schematic top view of a locking assembly according to an embodiment of the present application in a first unlocked state;

FIG. 11 is a schematic cross-sectional view of a base structure of a ventricular connection device according to an embodiment of the present application;

FIG. 12 is an exploded view of the base structure of the ventricular connection device according to an embodiment of the present application at a second viewing angle;

Fig. 13 is a schematic cross-sectional view of a locking assembly according to an embodiment of the present application in a second locked state.

The reference numerals are as follows:

10-ventricular connection means; 10 a-inner bore;

100-connecting piece; 101-a first seal groove; 120-seals; 102-a first positioning groove; 103-a second positioning groove;

110-a base structure; a 111-lock assembly; 111 a-balls; 111 b-a connecting ring; 111 c-an outer ring; 1111—a first through hole; 1112-a first abutment; 1112 a-a first contact surface; 1112 b-a second contact surface; 1113-a first mating portion; 1113 a-grooves; 1114-a second mating portion; 1114 a-break; 111 d-elastic elements; 1115-external teeth; 112-a suturing assembly; 112 a-clamping ring; 112 b-sewing the skirt; 112 c-an inner ring; 1116-a limiting part; 1117-a first bump; 1118-a first connecting groove; 1119-a second connecting groove; 1120-a second bump; 1121-a first limit groove; 113-snap ring;

200-ventricular assist device; 210-an upper housing; 220-inlet pipe; 230-grooves; 200 a-monolithic structure;

300-heart; 310-apex; 400-sleeve.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

As described in the background, in the related art, the ventricular attachment device and the ventricular assist device are fixed together, which requires redundant operation steps. For example, a tool (screwdriver) is required to lock the screw or clip to secure the ventricular attachment device to the ventricular assist device. These actions reduce the efficiency of the connection of the two, and extend the surgical time, thus increasing the surgical risk.

Based on the above, the application provides a ventricular connection device and a ventricular connection system, which are beneficial to improving the connection efficiency of a ventricular assist device, thereby reducing the operation time and further reducing the operation risk.

An embodiment of the first aspect of the present application proposes a ventricular attachment device 10 for connecting a ventricular assist device 200 to a heart 300. As shown in fig. 1 to 3, the ventricular assist device 200 includes an upper housing 210 and an inlet pipe 220 communicating with the top of the upper housing 210. Ventricular connection device 10 includes a connector 100 and a base structure 110. The connector 100 is configured to fit over the inlet tube 220 and connect with the upper housing 210. As shown in fig. 1 and 4, the base structure 110 is configured to be connected to the heart 300, and the base structure 110 includes a locking assembly 111 sleeved outside the connector 100, where the locking assembly 111 has a first locked state in which the locking assembly 111 is fixedly connected to the connector 100, and a first unlocked state in which the connector 100 is rotatable relative to the locking assembly 111 and movable relative to the locking assembly 111.

The ventricular connection device 10 of the present application is used to connect a ventricular assist device 200 to a heart 300. The ventricular assist device 200 may be, for example, a blood pump. The connection of the connector 100 of the ventricular connection device 10 and the upper housing 210 of the ventricular assist device 200 can be performed in advance before the operation. Specifically, as shown in fig. 3 and 4, the upper housing 210 is provided with a groove 230 connected to the connector 100, the connector 100 of the ventricular connecting device 10 is sleeved on the inlet tube 220 of the ventricular assist device 200, and the connector 100 is clamped in the groove 230. Alternatively, the connector 100 may be welded within the recess 230 by laser welding to fixedly connect the connector 100 to the ventricular assist device 200. Of course, other means of achieving a secure connection of the connector 100 to the upper housing 210 are possible. Since this work is a pre-operative preparation, the subsequent operative time is not increased.

As shown in fig. 2, when the upper housing 210 of the ventricular assist device 200 and the inlet tube 220, and the connector 100 of the ventricular connection device 10 are integrally connected as described above, an overall structure 200a as shown in the dashed frame of fig. 2 may be formed.

After the overall structure 200a is ready, the ventricular assist device 200 is implanted as follows: as shown in fig. 1, an artificial blood vessel 400 is connected at one end to an aorta 410 of a natural heart 300 and at the other end to an outlet 230 of a ventricular assist device 200 in a unitary structure 200 a. The base structure 110 is then sutured to the apex 310 of the heart 300 at the apex 310. Thereafter, as shown in fig. 2, a circular hole is formed in the apex 310 along the inner hole 10a of the base structure 110, and the integrated structure 200a is inserted into the ventricle through the circular holes of the inner hole 10a of the base structure 110 and the apex 310. When the inlet tube 220 is plugged, indicating that the ventricular assist device 200 is connected to the ventricular connecting device 10, the connection of the ventricular assist device 200 to the natural heart 300 is achieved.

As can be seen from the above, the ventricular connection device 10 according to the present application has the connector 100 to be fitted over the inlet tube 220 of the ventricular assist device 200 in advance and connected to the upper housing 210. The base structure 110 thereof is adapted to be sutured to the apex 310 of the heart 300.

Further, the base structure 110 also serves to enable fixation and separation from the ventricular assist device 200. Specifically, the base structure 110 includes a locking assembly 111, the locking assembly 111 having a first locked state in which the locking assembly 111 is fixedly connected with the connector 100, and a first unlocked state in which the connector 100 is rotatable relative to the locking assembly 111 and movable relative to the locking assembly 111.

Thus, the locking assembly 111 of the base structure 110 may be switched between the first locked state and the first unlocked state after the formed unitary structure 200a is inserted into the internal bore 10a of the base structure 110. When the locking assembly 111 is in the first locked state, the locking assembly 111 is fixedly connected to the connector 100. At this time, the integral structure 200a is fixedly connected with the base structure 110. That is, the ventricular assist device 200 is fixedly coupled to the ventricular connecting device 10 without rotational or axial movement therebetween, thereby coupling the ventricular assist device 200 to the natural heart 300. When the locking assembly 111 is in the first unlocked state, the connector 100 may be rotated relative to the locking assembly 111, e.g., from a first position to a second position, or the connector 100 may be axially moved relative to the locking assembly 111, e.g., to withdraw the unitary structure 200a from the internal bore 10a of the base structure 110 or to insert the unitary structure 200a into the internal bore 10a of the base structure 110. Since the unitary structure 200a includes the connector 100 and the ventricular assist device 200, the locking assembly 111 is part of the base structure 110. Therefore, at this time, the connector 100 can drive the ventricular assist device 200 to rotate relative to the base structure 110, or can drive the ventricular assist device 200 to be detached from or inserted into the base structure 110. In this way, a relative rotation and insertion between the ventricular assist device 200 and the ventricular connection device 10 is achieved.

In summary, in the ventricular connecting device 10 of the present application, the connecting member 100 and the ventricular assist device 200 are fixedly connected prior to the operation. Then, the integrated structure 200a formed by the connector 100 and the ventricular assist device 200 is inserted into the base structure 110. The locking assembly 111 in the base structure 110 is also switchable between a first locked state and a first unlocked state. When the locking assembly 111 is in the first locked state, the ventricular assist device 200 is fixedly connected to the ventricular connecting device 10, and no rotational or axial movement occurs between the two, thereby connecting the ventricular assist device 200 to the natural heart 300. When the locking assembly 111 is in the first unlocked state, the connector 100 can drive the ventricular assist device 200 to rotate relative to the base structure 110, and can also drive the ventricular assist device 200 to be separated from or inserted into the base structure 110. In this way, a relative rotation and axial insertion and extraction between the ventricular assist device 200 and the ventricular connection device 10 is achieved. Thus, in a first aspect, a physician may need to insert and withdraw the ventricular assist device 200 multiple times during an implantation procedure. The application can realize the quick connection or disconnection of the ventricular assist device 200 by the locking assembly 111 in the base structure 110 without using tools to fasten or unfasten the ventricular assist device 200 and the ventricular connecting device 10, thereby greatly shortening the operation time and reducing the operation risk. In a second aspect, during the implantation procedure, it is also generally necessary to rotate the ventricular assist device 200 to adjust the angle of the outlet 230 so that the vascular prosthesis is smoother. Thus, the present application also enables relative rotation between the ventricular assist device 200 and the ventricular attachment device 10 by the locking assembly 111 in the base structure 110, thereby enabling the angle of the outlet 230 of the ventricular assist device 200 to be adjusted at any time. Therefore, the convenience of operation can be further improved, further the operation time is further saved, and the operation risk is reduced.

In the present application, the axial direction refers to the direction in which the axis of the inlet pipe 220 is located.

Optionally, in some embodiments, as shown in fig. 2-4, the ventricular connection device 10 may further include a sleeve 400. After the connector 100 is fixedly connected with the upper housing 210 of the ventricular assist device 200, the sleeve 400 is sleeved on the upper surface of the connector 100, and the sleeve 400 is fixedly and hermetically connected with the inlet pipe 220. In particular, the connection and sealing of the sleeve 400 to the inlet tube 220 may be achieved by means of laser welding. In this way, the connecting member 100 is located between the sleeve 400 and the upper housing 210, so that the connecting member 100 can be prevented from falling off from the upper housing 210, thereby further improving the connection stability and reliability of the connecting member 100 and the upper housing 210. In a second aspect, the sleeve 400 seals against the inlet tube 200, thereby preventing blood from flowing into the gap between the connector 100 and the inlet tube 220, and thus also facilitating improved sealing of the ventricular connection device 10. This work is also a pre-operative preparation, and therefore does not increase the subsequent operative time.

In some embodiments, as shown in fig. 2 and 3, the outer surface of the connector 100 is circumferentially provided with a first seal groove 101, and the ventricular connection device 10 further includes a seal 120, the seal 120 being disposed within the first seal groove 101 to seal a gap between the connector 100 and the base structure 110. In this embodiment, the ventricular connection device 10 further includes a seal 120. The seal 120 may be, for example, an O-ring. By providing the sealing member 120, a gap between the connector 100 and the base structure 110 can be sealed, and blood outflow is avoided, thereby facilitating improvement of sealing performance and reliability of the ventricular connecting device 10 and improving operation safety.

In some embodiments, as shown in fig. 2 and 3, the outer surface of the connector 100 is provided with a plurality of first positioning slots 102 circumferentially spaced apart. As shown in fig. 5 to 8, the locking assembly 111 includes at least one ball 111a, a connection ring 111b sleeved outside the connector 100, and an outer ring 111c sleeved outside the connection ring 111b, the connection ring 111b is provided with at least one first through hole 1111 penetrating in a radial direction thereof, an inner wall of the outer ring 111c is provided with a first abutment 1112 opposite to the first through hole 1111, the first abutment 1112 has a first contact surface 1112a and a second contact surface 1112b located on at least one side of the first contact surface 1112a, and the second contact surface 1112b is connected with the first contact surface 1112a and extends in a direction approaching to the inner wall of the outer ring 111 c. The outer ring 111c is rotatably connected with the connection ring 111b to switch the locking assembly 111 between the first locked state and the first unlocked state. As shown in fig. 9, in the first locked state, the ball 111a is located in the first through hole 1111 and abuts against the first contact surface 1112a and the first positioning groove 102, respectively. As shown in fig. 10, in the first unlocked state, the ball 111a is located in the first through hole 1111 and abuts against the second contact surface 1112 b.

The present embodiment proposes a specific structure of the locking assembly 111. The locking assembly 111 includes at least one ball 111a, a connecting ring 111b, and an outer ring 111c. As shown in fig. 6 and 7, the connection ring 111b is provided with at least one first through hole 1111, and the first through hole 1111 is for receiving the ball 111a. That is, the balls 111a and the first through holes 1111 are in one-to-one correspondence. As shown in fig. 8, the inner wall of the outer ring 111c is provided with a first abutment 1112 opposite to the first through-hole 1111. That is, the first abutments 1112 and the first through holes 1111 are also in one-to-one correspondence.

The connection ring 111b is sleeved outside the connection member 100, and the outer ring 111c is sleeved outside the connection ring 111 b. The outer ring 111c is rotatably connected with the connection ring 111b to switch the locking assembly 111 between the first locked state and the first unlocked state. Referring to fig. 9 and 10, the principle of the locking assembly 111 achieving the first unlocked state and the first locked state will be specifically described below.

As shown in fig. 11, when the outer ring 111c and the connection ring 111b do not rotate, the balls 111a are positioned in the first through holes 1111, and one end of the balls 111a abuts against the first contact surface 1112a of the first abutment 1112. In this state, the other end of the ball 111a protrudes from the inner surface of the connection ring 111 b. At this time, the balls 111a may form an interference effect, so that the integrated structure 200a formed by the connection member 100 and the ventricular assist device 200 cannot be inserted to the bottom.

As shown in fig. 10 and referring to fig. 2, since the outer ring 111c is rotatably coupled with the coupling ring 111 b. Accordingly, a clockwise or counterclockwise rotational torque T is first applied to the outer ring 111c to rotate the outer ring 111c by an angle with respect to the connection ring 111 b. The direction of the rotational torque T may be dependent on the number of second contact surfaces 1112b on the first abutment 1112. For example, if the second contact surface 1112b is two and is located on both sides of the first contact surface 1112a, the clockwise rotation torque T may be applied or the counterclockwise rotation torque T may be applied. If there is only one second contact surface 1112b, the direction of the rotational torque T needs to be determined according to the position of the second contact surface 1112b with respect to the first contact surface 1112 a. In fig. 10, the second contact surface 1112b is two and is located at both sides of the first contact surface 1112a, so that the clockwise rotation torque T is applied as an example, but not as a specific limitation thereof.

At this time, as the outer ring 111c rotates, the second contact surface 1112b of the first contact 1112 is brought into contact with the ball 111 a. Since the second contact surface 1112b extends toward the inner wall of the outer ring 111c, that is, the second contact surface 1112b is closer to the inner wall of the outer ring 111 c. Accordingly, the space of the ball 111a in the radial direction increases, thereby allowing the ball 111a to move in the extending direction of the first through hole 1111. In this case, one end of the ball 111a is in contact with the second contact surface 1112b, and the other end does not protrude from the inner surface of the connection ring 111 b. Thus, the locking assembly 111 is in the first unlocked state. At this time, the integral structure 200a may be inserted into the base structure 110 or the integral structure 200a may be pulled out of the base structure 110. That is, in the first unlocked state, rapid axial insertion and circumferential rotation of the ventricular assist device 200 may be achieved.

If it is desired to lock both the unitary structure 200a and the base structure 110, a rotational torque opposite to the direction of the rotational torque T may be applied to the outer ring 111 c. Thus, as shown in fig. 9, as the outer ring 111c rotates, the first contact surface 1112a of the first contact piece 1112 of the outer ring 111c comes into contact with the ball 111a again. In this process, the ball 111a moves in the first through hole 1111 in a direction approaching the connection member 100, and finally one end of the ball 111a is fixed in the first positioning groove 102 of the connection member 100, and the other end abuts against the first contact surface 1112 a. In this case, the locking assembly 111 is in the first locked state. That is, the ventricular assist device 200 and the ventricular connection device 10 achieve a fixed connection.

Both the unitary structure 200a and the base structure 110 are changed from locked to unlocked if desired. At this time, the above-described process is repeated, and the outer ring 111c is rotated by an angle with respect to the connection ring 111b, so that the second contact surface 1112b of the first contact member 1112 of the outer ring 111c contacts the ball 111 a.

In the above, a part of the ball 111a is always located in the first through hole 1111. When the integrated structure 200a is not inserted into the locking assembly 111, the first through hole 1111 may be a tapered through hole in order to prevent the balls 111a from falling off from the inside of the first through hole 1111. Specifically, the aperture of the side of the first through hole 1111 near the connector 100 is smaller than the aperture of the side of the first through hole 1111 near the outer ring 111 c.

Alternatively, in some embodiments, the second contact surface 1112b is two and is located on two sides of the first contact surface 1112a, and the second contact surface 1112b is a bevel.

In some embodiments, as shown in fig. 9, the connection ring 111b is provided with three first through holes 1111 at intervals along the circumferential direction thereof, the inner wall of the outer ring 111c is provided with three first abutments 1112 opposite to the three first through holes 1111, and the number of balls 111a is the same as the number of first through holes 1111.

In this embodiment, the number of the first through holes 1111, the balls 111a and the first abutments 1112 is three. As can be seen from the locking and unlocking principle described above, in the first locked state, the balls 111a are relied upon to provide the locking force between the base structure 110 and the overall structure 200 a. The greater the number of balls 111a, the less likely the base structure 110 and the overall structure 200a will fall off due to external force in the first locked state. By providing a plurality of first through holes 1111, balls 111a and first abutments 1112, the reliability and stability of the connection between the base structure 110 and the overall structure 200a in the first locked state can be advantageously improved, and the safety of the operation can be advantageously improved.

It should be noted that the number of the first through holes 1111, the balls 111a, and the first abutments 1112 may be two, four, or the like, and may be flexibly set according to practical situations.

In some embodiments, as shown in fig. 7, 8 and 9, the outer wall of the connection ring 111b is provided with a first mating portion 1113, the upper surface of the first mating portion 1113 is provided with a groove 1113a, the inner wall of the outer ring 111c is provided with a second mating portion 1114 that is adhered to the upper surface of the first mating portion 1113, the second mating portion 1114 is provided with a fracture 1114a opposite to the groove 1113a, the groove 1113a and the fracture 1114a together form a first accommodating cavity S1, and the locking assembly 111 further includes an elastic element 111d disposed in the first accommodating cavity S1.

In this embodiment, the locking assembly 111 further includes an elastic element 111d. As shown in fig. 7 and 8, the outer wall of the connection ring 111b is provided with a first fitting portion 1113, and the inner wall of the outer ring 111c is provided with a second fitting portion 1114 that is fitted to the upper surface of the first fitting portion 1113. That is, when the connection ring 111b is assembled with the outer ring 111c, the first fitting portion 1113 and the second fitting portion 1114 are fitted, and the second fitting portion 1114 is located on the upper surface of the first fitting portion 1113. Further, the upper surface of the first mating portion 1113 is provided with a recess 1113a, and the second mating portion 1114 is provided with a break 1114a opposite to the recess 1113 a. When the two are attached, the recess 1113a and the fracture 1114a together form a first accommodating cavity S1 with an opening above. The present embodiment provides the elastic member 111d in the first accommodation chamber S1. Thus, when the outer ring 111c rotates relative to the connection ring 111b, the elastic member 111d abuts against the side wall of the recess 1113a as well as the side wall of the break 1114a of the outer ring 111 c. Therefore, the elastic member 111d is compressed by the rotation of the outer ring 111c, and thus generates a reaction force.

The elastic member 111d has various functions. In the first aspect, when the rotational torque T is applied to rotate the outer ring 111c by an angle with respect to the connection ring 111b, the second contact surface 1112b of the first contact member 1112 contacts the ball 111 a. At this time, the elastic member 111d is compressed, and the locking assembly 111 is in the first unlocked state. In this state, the ventricular assist device 200 can be quickly inserted and removed or the angle can be adjusted. When these operations are completed, the elastic member 111d may provide a reaction force so that the outer ring 111c is restored to its original position with respect to the connection ring 111 b. At this time, one end of the ball 111a is fixed in the first positioning groove 102 of the connector 100, the other end is in contact with the first contact surface 1112a, the elastic element 111d is restored, and the lock assembly 111 is in the first locked state. In this state, the ventricular assist device 200 and the ventricular connecting device 10 achieve a fixed connection. By providing the elastic member 111d, a reaction force can be provided without requiring an artificial operation, thereby facilitating the switching of the locking assembly 111 between the first locked state and the first unlocked state. In the second aspect, the elastic member 111d may be disposed in the first accommodation chamber S1 in a pre-compressed state. At this time, the elastic element 111d has an initial reaction force. In this way, the force for driving the outer ring 111c to rotate relative to the connection ring 111b can be increased, so that the outer ring 111c is prevented from easily rotating, and the reliability of the locking assembly 111 in the first locking state is improved.

Alternatively, the elastic member 111d may be one of a compression spring, a rubber spring, and the like.

Optionally, to improve the convenience of rotating the outer ring 111c, the outer surface of the outer ring 111c is further provided with external teeth 1115, which facilitate the clamping of the outer ring 111c by surgical tools.

In fig. 8, the second fitting portion 1114 and the first contact 1112 are integrally formed. Of course, the second engaging portion 1114 and the first abutting piece 1112 may also be disposed at a distance, which is not limited in the present application.

In addition, in the present application, the upper, upper surface means that when the base structure 110 of the ventricular attachment device 10 is sutured to the apex 310, the side near the apex 310 is the upper side, and the side away from the apex 310 is the lower side opposite the upper side.

In some embodiments, as shown in fig. 4, 6 and 11, the base structure 110 further comprises a sewing assembly 112, the sewing assembly 112 comprising a press ring 112a, a sewing skirt 112b, and an inner ring 112c, the press ring 112a being connected to the upper surface of the connecting ring 111b, the inner ring 112c being connected to the inner surface of the connecting ring 111b, the sewing skirt 112b being located between the inner ring 112c and the press ring 112 a.

In this embodiment, the base structure 110 further includes a suturing assembly 112, the suturing assembly 112 being used to suture the base structure 110 to the apex 310. Stitching assembly 112 includes a clamp ring 112a, a stitching skirt 112b, and an inner ring 112c. One end of the clamping ring 112a is connected to the upper surface of the connecting ring 111b, and the other end thereof presses the sewing skirt 112b, thereby facilitating improvement of sealing performance between the clamping ring 112a and the sewing skirt 112 b. The sewing skirt 112b is required to be sewn to the apex 310, and the sewing skirt 112b is substantially horn-shaped, which is advantageous in that the convenience of sewing is improved. The sewing skirt 112b may be a polyester cloth material. The inner ring 112c is connected to the inner surface of the connection ring 111 b. In this way, axial fixation between the connecting ring 111b, the pressing ring 112a, the sewing skirt 112b, and the inner ring 112c can be achieved. In this embodiment, the suturing assembly 112 of the base structure 110 can be used to connect the base structure 110 to the apex 310, and the locking assembly 111 can be used to lock and unlock the base structure 110 to the integral structure 200 a. Also, the suturing assembly 112 and the locking assembly 111 may be tightly coupled as one body. In this way, the overall axial dimension of the base structure 110 is made smaller. As shown in fig. 1, when the ventricular assist device 200 is coupled to the heart 300, the distance therebetween is only the axial dimension of the base structure 110. In this way, the space occupied by the ventricular assist device 200 and the ventricular connecting device 10 can be reduced as a whole, and adverse effects on the human body due to implantation of the ventricular assist device 200 and the ventricular connecting device 10 can be reduced as much as possible, which is advantageous for further reducing the risk of surgery.

In some embodiments, as shown in fig. 7, at least one limiting portion 1116 is disposed on the outer wall of the connection ring 111b at intervals along the circumferential direction, the limiting portion 1116 is located at one side of the first through hole 1111, and the limiting portion 1116 is configured to limit the rotation angle of the outer ring 111c relative to the connection ring 111 b.

As is clear from the foregoing description of the first locked state and the first unlocked state, the balls 111a are switched only between the first contact surface 1112a and the second contact surface 111, so that the balls 111a can be prevented from falling into the gap between the outer ring 111c and the inner ring 111b due to the excessive space and being separated from the first through hole 1111. Thus, in the present embodiment, the outer wall of the connection ring 111b is provided with the stopper 1116. In this way, in the process of rotating the outer ring 111c, the limiting portion 1116 interferes with the first abutting piece 1112, so that the outer ring 111c can be prevented from rotating at an excessive angle relative to the connecting ring 111, and the balls 111a can be prevented from flowing out of the first through hole 1111 and falling into the gap between the outer ring 111c and the inner ring 111b, so that the reliability of the locking assembly 111 can be improved.

In some embodiments, as shown in fig. 11 and 12, at least one first protrusion 1117 is disposed on a side surface of the pressing ring 112a near the connection ring 111b, and the first protrusion 1117 is offset from the limiting portion 1116, so that the pressing ring 112a and the connection ring 111b are circumferentially fixed. In this embodiment, the pressing ring 112a is provided with at least one first protrusion 1117 on a side surface thereof adjacent to the connection ring 111 b. The first protrusion 1117 and the stopper 1116 are offset from each other in the thickness direction of the connection ring 111 b. Thus, when the pressing ring 112a is connected to the upper surface of the connecting ring 111b, the first protrusion 1117 is inserted into the recess on one side of the limiting portion 1116, so as to fix the pressing ring 112a and the connecting ring 111b circumferentially, and prevent them from rotating.

Alternatively, the first protrusions 1117 are three, and are uniformly circumferentially arranged.

In some embodiments, as shown in fig. 6, 7, 11 and 12, the inner wall of the connection ring 111b is provided with a first connection groove 1118 along the circumferential direction, the outer surface of the inner ring 112c is provided with a second connection groove 1119 adapted to the first connection 1118, and the base structure 110 further includes a snap ring 113, where the snap ring 113 is located between the first connection groove 1118 and the second connection groove 1119, so that the inner ring 112c and the connection ring 111b are axially fixed. In this embodiment, the base structure 110 further includes a snap ring 113. The snap ring 113 is clamped in the accommodating cavity formed by the first connecting groove 1118 and the second connecting groove 1119, so that the inner ring 112c and the connecting ring 111b are axially fixed. In this way, the sewing skirt 112b, the clamp ring 112a, the connecting ring 111b, and the outer ring 111c are sequentially pressed by the inner ring 112 c.

In some embodiments, as shown in fig. 6, 7 and 12, at least one second protrusion 1120 is circumferentially provided on the outer surface of the inner ring 112c, and a first limit groove 1121 adapted to the second protrusion 1120 is provided on the inner wall of the connection ring 111b, and the second protrusion 1120 cooperates with the first limit groove 1121 to fix the inner ring 112c and the connection ring 111b circumferentially. In this embodiment, the second protrusion 1120 and the first limiting groove 1121 are matched, so as to fix the inner ring 112c and the connecting ring 111b circumferentially, and prevent the two from rotating relatively. Optionally, the second protrusion 1120 and the first limiting groove 1121 may also be interchanged. That is, the second protrusion 1120 is circumferentially provided on the inner wall of the connection ring 111b, and the first limit groove 1121 is provided on the outer surface of the inner ring 112c, which is not limited in the present application. Alternatively, the number of the second protrusions 1120 and the first limiting grooves 1121 is three.

In some embodiments, as shown in fig. 2 to 4, the outer surface of the connector 100 is provided with a plurality of second positioning grooves 103 at intervals along the circumferential direction, the second positioning grooves 103 are located above the first positioning grooves 102, the locking assembly 111 further has a second locking state, the outer ring 111c is rotatably connected with the connecting ring 111b, so that the locking assembly 111 is switched between a second locking state and a first unlocking state, and in the second locking state, the balls 111a are located in the first through holes 1111 and respectively abut against the first contact surface 1112a and the second positioning grooves 103.

In this embodiment, the outer surface of the connecting piece 100 is further provided with a second positioning groove 103, and the second positioning groove 103 is located above the first positioning groove 102. This way, the locking assembly 111 of the present application also has a second locked state. Since the principle of the first locked state and the first unlocked state has been described in detail, a detailed description thereof is omitted herein. At the time of operation, the locking assembly 111 is first required to be switched to the first unlocked state, and then circumferential rotation of the ventricular assist device 200 and the base structure 110 is achieved, and the ventricular assist device 200 is axially inserted to the bottom. However, when the lock assembly 111 is switched, the outer ring 111c needs to be rotated by one angle with respect to the connection ring 111 b. When the base structure 110 is not connected to the integral structure 200a, if the outer ring 111c is rotated, the connecting ring 111b will rotate along with the outer ring 111c, so that the state of the locking assembly 111 cannot be switched.

Thus, in the present embodiment, the second positioning groove 103 is provided on the outer surface of the connector 100. In this way, as shown in fig. 13, during the operation, the integral structure 200a may be inserted into the inner hole 10a of the base structure 110 first, so that one end of the ball 111a is located in the second positioning groove 103, and the other end abuts against the first contact surface 1112 a. That is, the balls 111a may be directly engaged into the second positioning groove 103 under the inserted axial force, so that the locking assembly 111 is in the second locking state. In this way, when the outer ring 111c is rotated, the connection ring 111b does not rotate together with the outer ring 111c, so that switching of the locking assembly 111 between the first locked state and the first unlocked state can be achieved, and finally, as shown in fig. 4, the overall structure 200a is plugged to the bottom. In other words, the second positioning groove 103 may enable pre-fixing between the connection ring 111b and the connection member 100 in the locking assembly 111, and then may apply a driving torque to the outer ring 111c to enable switching of the locking assembly 111 between the first locked state and the first unlocked state. Thereby, the convenience of state switching of the locking assembly 111 is advantageously improved.

An embodiment of the second aspect of the present application proposes a ventricular connection system comprising a ventricular assist device 200 and a ventricular connection device 10 according to the first aspect, wherein the ventricular assist device 200 comprises an upper housing 210 and an inlet pipe 220 communicating with the top of the upper housing 210, and the connection member 100 is sleeved on the inlet pipe 220 and connected to the upper housing 210.

The ventricular connection system of the present application provides a secure connection between the connector 100 and the ventricular assist device 200 prior to surgery. Then, the integrated structure 200a formed by the connector 100 and the ventricular assist device 200 is inserted into the base structure 110. The locking assembly 111 in the base structure 110 is also switchable between a first locked state and a first unlocked state, thereby enabling relative rotation and axial insertion and extraction between the ventricular assist device 200 and the ventricular connection device 10. Thus, in the first aspect, the locking assembly 111 of the base structure 110 can enable the ventricular assist device 200 to be quickly connected or disconnected without using tools to fasten or unfasten the ventricular assist device 200 and the ventricular connect device 10, thereby greatly shortening the operation time and reducing the risk of the operation. In the second aspect, the relative rotation between the ventricular assist device 200 and the ventricular connecting device 10 can also be achieved, so that the angle of the outlet 230 of the ventricular assist device 200 can be adjusted at any time. Therefore, the convenience of operation can be further improved, further the operation time is further saved, and the operation risk is reduced.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims

1. A ventricular connection device for connecting a ventricular assist device to a heart, the ventricular assist device comprising an upper housing and an inlet tube in communication with a top portion of the upper housing, the ventricular connection device comprising:

the connecting piece is configured to be sleeved on the inlet pipe and connected with the upper shell; and

The base structure is used for being connected with the heart and comprises a locking component sleeved outside the connecting piece, the locking component has a first locking state and a first unlocking state, in the first locked state, the locking assembly is fixedly connected with the connecting piece, and in the first unlocked state, the connecting piece can rotate relative to the locking assembly and move relative to the locking assembly.

2. The ventricular connection device of claim 1, wherein the outer surface of the connector is circumferentially spaced apart with a plurality of first positioning slots;

the locking assembly comprises at least one ball, a connecting ring sleeved outside the connecting piece and an outer ring sleeved outside the connecting ring, the connecting ring is provided with at least one first through hole penetrating along the radial direction of the connecting ring, the inner wall of the outer ring is provided with a first abutting piece opposite to the first through hole, the first abutting piece is provided with a first contact surface and a second contact surface positioned on at least one side of the first contact surface, and the second contact surface is connected with the first contact surface and extends towards the direction close to the inner wall of the outer ring;

The outer ring is rotatably connected with the connecting ring so that the locking assembly is switched between a first locking state and a first unlocking state, and in the first locking state, the balls are positioned in the first through holes and respectively abutted against the first contact surface and the first positioning groove; in the first unlocking state, the ball is located in the first through hole and abuts against the second contact surface.

3. The ventricular connecting device according to claim 2, wherein the connecting ring is provided with three first through holes at intervals along a circumferential direction thereof, and an inner wall of the outer ring is provided with three first abutments opposite to the three first through holes, and the number of the balls is the same as the number of the first through holes.

4. The ventricular connection device of claim 2, wherein an outer wall of the connection ring is provided with a first mating portion, an upper surface of the first mating portion being provided with a groove;

the inner wall of the outer ring is provided with a second matching part which is attached to the upper surface of the first matching part, the second matching part is provided with a fracture which is opposite to the groove, and the groove and the fracture jointly form a first accommodating cavity;

the locking assembly further includes a resilient element disposed within the first receiving cavity.

5. The ventricular connection device of claim 2, wherein the base structure further comprises a suturing assembly comprising a clamp ring, a suturing skirt, and an inner ring;

The clamping ring is connected with the upper surface of the connecting ring, the inner ring is connected with the inner surface of the connecting ring, and the sewing skirt is positioned between the inner ring and the clamping ring.

6. The ventricular connection device of claim 5, wherein the outer wall of the connection ring is circumferentially spaced apart with at least one stop portion on one side of the first through-hole, the stop portion configured to define an angle of rotation of the outer ring relative to the connection ring.

7. The ventricular connecting device of claim 6, wherein at least one first protrusion is provided on a side surface of the pressing ring adjacent to the connecting ring, and the first protrusion is offset from the limiting portion, so that the pressing ring and the connecting ring are circumferentially fixed.

8. The ventricular connection device of claim 5, wherein an inner wall of the connection ring is circumferentially provided with a first connection groove, an outer surface of the inner ring is provided with a second connection groove opposite the first connection groove, the base structure further comprises a snap ring between the first and second connection grooves to axially secure the inner ring and the connection ring;

and/or, the outer surface circumference of the inner ring is provided with at least one second bulge, the inner wall of the connecting ring is provided with a first limit groove matched with the second bulge, and the second bulge is matched with the first limit groove so as to fix the inner ring and the connecting ring circumferentially.

9. The ventricular connection device of claim 2, wherein the outer surface of the connection member is circumferentially spaced apart with a plurality of second detents, the second detents being located above the first detents;

The locking assembly further has a second locking state, the outer ring is rotatably connected with the connecting ring, so that the locking assembly is switched between the second locking state and the first unlocking state, and in the second locking state, the balls are located in the first through holes and respectively abutted with the first contact surface and the second positioning groove.

10. A ventricular connection system comprising a ventricular assist device and a ventricular connection device as claimed in any one of claims 1 to 9, said ventricular assist device comprising an upper housing and an inlet tube in communication with a top portion of said upper housing, said connector being fitted over said inlet tube and connected to said upper housing.