Ventricular assist device

Abstract

The utility model relates to a ventricular assist device. The ventricular auxiliary device comprises a pump body, an artificial blood vessel, a clamping assembly and a sealing ring, the pump body is provided with an outlet pipe, the outlet pipe is sleeved with the artificial blood vessel, the artificial blood vessel is sleeved with the sealing ring, the sealing ring comprises a first annular end and a second annular end which are oppositely arranged in the axial direction of the sealing ring, the sealing ring is provided with a notch penetrating through the first annular end to the second annular end, and the clamping assembly is arranged on the peripheral face of the sealing ring. When the clamping assembly clamps, the width of the notch can be reduced, so that the sealing ring is locked to the artificial blood vessel, and the artificial blood vessel is in sealing joint with the outlet pipe. According to the ventricular auxiliary device, the sealing ring is arranged between the clamping assembly and the artificial blood vessel, so that the artificial blood vessel and the outlet tube can be hermetically connected, and the phenomenon of blood leakage between the artificial blood vessel and the outlet tube can be avoided; the notch of the sealing ring enables the inner diameter of the sealing ring to be changeable so as to adapt to outlet pipes of different sizes.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a ventricular assist device. Background Art

[0002] A ventricular assist device is a device that connects the ventricle and blood vessels to assist patients with severe ventricular insufficiency or heart failure to provide a certain amount of blood flow and blood pressure. After the artificial blood vessel of a traditional ventricular assist device is sheathed on the outlet tube of the ventricular assist device, a clamp is usually used to fasten the artificial blood vessel to the outlet tube of the ventricular assist device. However, blood leakage still occurs between the artificial blood vessel and the outlet tube of the ventricular assist device. Utility Model Content

[0003] Based on this, it is necessary to provide a ventricular assist device to address the technical problem of blood leakage between the existing artificial blood vessel and the outlet tube of the ventricular assist device.

[0004] A ventricular assist device, comprising:

[0005] A pump body, wherein the pump body is provided with an outlet pipe;

[0006] An artificial blood vessel, the artificial blood vessel comprising a main pipe section and a fixed section connected to the main pipe section, the fixed section being sleeved on the outlet pipe;

[0007] A sealing ring, wherein the sealing ring is sleeved on the fixed section, the sealing ring comprises a first annular end and a second annular end which are arranged opposite to each other along the axial direction of the sealing ring, a ring wall of the sealing ring is provided with a notch, and the notch extends along the axial direction of the sealing ring and penetrates the first annular end and the second annular end; and

[0008] A clamping assembly is arranged on the outer peripheral surface of the sealing ring, and the clamping assembly can adjust the width of the gap to lock the sealing ring to the artificial blood vessel.

[0009] In one embodiment, the notch at least includes an inclined portion, and an extending direction of the inclined portion is inclined relative to an axis of the sealing ring.

[0010] In one embodiment, the angle between the inclined portion and the axis of the sealing ring is α, wherein 20°≤α≤40°

[0011] In one embodiment, the gap includes a first section, a second section and a third section which are connected in sequence, wherein:

[0012] The first section and the third section are arranged obliquely relative to the second section;

[0013] And / or, the second section is arranged obliquely relative to the axis of the sealing ring.

[0014] In one embodiment, the second section is in an oblique line shape or an arc line shape.

[0015] In one embodiment, the first section extends along the axial direction of the sealing ring; and / or the third section extends along the axial direction of the sealing ring.

[0016] In one embodiment, a joint between the first section and the first annular end of the sealing ring is provided with a rounded corner; and / or a joint between the third section and the second annular end of the sealing ring is provided with a rounded corner.

[0017] In one embodiment, the axial length of the first section is L1, the axial length of the third section is L2, and the axial length of the sealing ring is d, wherein: 0.15≤L1 / d≤0.85;

[0018] And / or, 0.15≤L2 / d≤0.85.

[0019] In one embodiment, the sealing ring is a biocompatible structure; and / or the sealing ring has an initial form and an extreme form, and the sealing ring can be deformed between the initial form and the extreme form, wherein the sealing ring is linear in the initial form and annular in the extreme form.

[0020] In one embodiment, the clamping assembly includes a clamping ring and a buckle member, the clamping ring has an opening, the opening is formed by a first circumferential end and a second circumferential end arranged opposite to each other along the circumference of the clamping ring, a clamping portion is arranged on the first circumferential end of the clamping ring, and the buckle member is arranged on the second circumferential end of the clamping ring and can be buckled with the clamping portion to reduce the width of the opening;

[0021] Wherein, the opening formed between the first end and the second end of the clamping ring and the notch of the sealing ring are staggered in the circumferential direction of the sealing ring.

[0022] The above-mentioned ventricular assist device can achieve a sealed connection between the artificial blood vessel and the outlet tube by arranging a sealing ring between the clamping assembly and the fixed end of the artificial blood vessel; the sealing ring has a notch penetrating its own ring wall, and the notch allows the inner diameter of the sealing ring to change to adapt to outlet tubes of different sizes, thereby avoiding the situation where the sealing ring cannot be mounted on the outside of the outlet tube due to the outlet tube being too large or the inner diameter of the sealing ring being too small, and when the clamping assembly is clamped, the sealing ring will not bulge due to the reduction in the inner diameter of the sealing ring, thereby improving the sealing performance of the sealing ring and avoiding blood leakage between the artificial blood vessel and the outlet tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG. 1 is a three-dimensional view of a ventricular assist device provided in one embodiment of the present application.

[0024] FIG. 2 is an exploded schematic diagram of the ventricular assist device shown in FIG. 1 .

[0025] FIG. 3 is a side view of the ventricular assist device shown in FIG. 1 .

[0026] FIG. 4 is a cross-sectional view of the ventricular assist device shown in FIG. 3 along the AA direction.

[0027] 5 is a perspective view of the clamping assembly of the ventricular assist device shown in FIG. 1 in an open state.

[0028] FIG. 6 is an enlarged view of the ventricular assist device at point B provided in FIG. 4 .

[0029] FIG. 7 is a perspective view of the sealing ring of the ventricular assist device shown in FIG. 1 .

[0030] FIG. 8 is a front view of the sealing ring shown in FIG. 7 .

[0031] The reference numerals in the accompanying drawings are described as follows:

[0032] 10. Ventricular assist device; 100. Pump body; 110. Outlet pipe; 120. Inlet pipe; 130. Pump casing; 200. Artificial blood vessel; 210. Main pipe section; 220. Fixed section; 300. Sealing ring; 310. Notch; 311. First section; 3111. First side; 3112. Second side; 312. Second section; 313. Third section; 3131. Third side; 3132. Fourth side; 400. Clamping assembly; 410. Clamping ring; 411. Opening; 412. Clamping portion; 413. Blood vessel clamping cavity; 414. Articulated seat; 420. Fastener; 421. First fastening plate; 422. Second fastening plate; 4221. Clamping hole; 4222. Avoidance hole; 430. Connecting ring; 431. Clamping portion. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full 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 improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0035] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0039] Referring to FIGS. 1 to 4 , an embodiment of the present application provides a ventricular assist device 10, which includes a pump body 100, an artificial blood vessel 200, a sealing ring 300 and a clamping assembly 400; the pump body 100 is provided with an outlet pipe 110, the artificial blood vessel 200 has a main pipe section 210 and a fixed section 220 connected to the main pipe section 210, the fixed section 220 is sleeved on the outlet pipe 110, and the sealing ring 300 is sleeved on the fixed section 220; the sealing ring 300 includes a sealing ring 300 along the sealing ring 300. The first annular end 300a and the second annular end 300b are axially opposite to each other, and the annular wall of the sealing ring 300 is provided with a notch 310, which extends along the axial direction of the sealing ring 300 and penetrates the first annular end 300a and the second annular end 300b; the clamping assembly 400 is arranged on the outer peripheral surface of the sealing ring 300, and the clamping assembly 400 can adjust the width of the notch 310 to lock the sealing ring 300 to the artificial blood vessel 200 and make the artificial blood vessel 200 sealed and connected with the outlet pipe 110.

[0040] The ventricular assist device 10 provided in the present application can achieve a sealed connection between the artificial blood vessel 200 and the outlet tube 110 by disposing a sealing ring 300 between the clamping assembly 400 and the fixed section 220 of the artificial blood vessel 200; the sealing ring 300 has a notch 310 that penetrates its own ring wall, and the notch 310 allows the inner diameter of the sealing ring 300 to be changed to adapt to outlet tubes 110 of different sizes, thereby avoiding the sealing ring 300 being unable to be sleeved on the outside of the outlet tube 110 due to the outlet tube 110 being too large or the inner diameter of the sealing ring 300 being too small, and when the clamping assembly 400 is clamped, the sealing ring 300 will not be arched due to the reduction in the inner diameter, so that the sealing ring 300 has better sealing performance and can avoid blood leakage between the artificial blood vessel 200 and the outlet tube 110.

[0041] The following describes the various components of the ventricular assist device 10:

[0042] 1 and 2 , the pump body 100 includes a pump casing 130, an impeller (not shown) and a drive motor (not shown), wherein the pump casing 130 is provided with an outlet pipe 110 and an inlet pipe 120; the impeller and the drive motor are arranged in the pump casing 130, and the drive motor drives the impeller to rotate, so that blood can enter the pump body 100 from the inlet pipe 120 and flow out from the outlet pipe 110 after the centrifugal action of the impeller.

[0043] The artificial blood vessel 200 is a circular pipe, one end of which is sleeved on the outlet tube 110, and the other end is connected to the aorta or the pulmonary artery, and is used to provide a channel for the flow of blood, so that the blood in the ventricle can flow to the aorta or the pulmonary artery through the pump body 100 and the artificial blood vessel 200. The fixed section 220 is the part of the artificial blood vessel 200 used to connect with the outlet tube 110, and the main tube section 210 is the rest of the artificial blood vessel 200, which is used for the flow of blood.

[0044] Referring to Figure 5, the clamping assembly 400 includes a clamping ring 410 and a fastener 420. The clamping ring 410 has an opening 411 and a blood vessel clamping cavity 413 that are connected to each other. The opening 411 is formed by a first circumferential end 410a and a second circumferential end 410b that are relatively arranged along the circumference of the clamping ring 410. A clamping portion 412 is arranged on the first circumferential end 410a of the clamping ring 410. The fastener 420 is arranged on the second circumferential end 410b of the clamping ring 410 and can be fastened with the clamping portion 412 to reduce the width of the opening 411.

[0045] The material of the clamping ring 410 has a certain degree of flexibility. Specifically, the clamping ring 410 can be made of aluminum alloy or titanium alloy, or other materials that can achieve the same effect. The material can be flexibly selected according to actual work needs.

[0046] The fastener 420 is hinged to the second circumferential end 410b of the clamping ring 410, and the fastener 420 can be rotated in the direction close to the clamping portion 412 so that the fastener 420 is fastened to the clamping portion 412. After the fastener 420 is fastened to the clamping portion 412, the fastener 420 can also be rotated in the direction away from the clamping portion 412 so that the opening 411 of the clamping ring 410 is reduced, thereby reducing the inner diameter of the blood vessel clamping cavity 413 and preventing the inner diameter of the blood vessel clamping cavity 413 from increasing.

[0047] When the artificial blood vessel 200 needs to be connected to the pump body 100, the artificial blood vessel 200 is first sleeved on the outside of the outlet tube 110, the sealing ring 300 is sleeved on the end of the artificial blood vessel 200 that matches the outlet tube 110, the clamping ring 410 surrounds the end of the artificial blood vessel 200 that matches the outlet tube 110 and corresponds to the sealing ring 300, and then the buckle 420 is rotated so that the buckle 420 is buckled with the clamping portion 412; then the buckle 420 is rotated in the opposite direction to open the clamping ring 410. The opposite sides of the opening 411 are deformed and contracted by the pulling force of the fastener 420 and the clamping portion 412, which makes the opening 411 smaller and the diameter of the blood vessel clamping cavity 413 in the clamping ring 410 smaller. The inner wall of the blood vessel clamping cavity 413 in the clamping ring 410 reduces the width of the notch 310 of the sealing ring 300, thereby clamping the artificial blood vessel 200 to prevent the inner diameter of the clamping ring 410 from increasing, so that the artificial blood vessel 200 is clamped on the outside of the outlet tube 110 and sealed.

[0048] When the connection needs to be loosened, the fastener 420 is rotated toward the clamping portion 412. At this time, the opposite sides of the opening 411 of the clamping ring 410 are not subject to the pulling force of the fastener 420 and the clamping portion 412 and recover their deformation. At the same time, the diameter of the blood vessel clamping cavity 413 of the clamping ring 410 becomes larger, so that the opening 411 becomes larger. Then the fastener 420 and the clamping portion 412 are released from the clamping portion, thereby loosening the inner wall of the blood vessel clamping cavity 413 of the clamping ring 410 from the artificial blood vessel 200, making it convenient to detach the artificial blood vessel 200 and the outlet tube 110 from the blood vessel clamping cavity 413 of the clamping ring 410.

[0049] Specifically, referring to FIG. 5 , the fastener 420 includes a first fastener plate 421 and a second fastener plate 422. Both the first fastener plate 421 and the second fastener plate 422 have a first circumferential end and a second circumferential end arranged along the circumference of the clamping ring 410. The second circumferential end of the first fastener plate 421 is hinged to the second circumferential end 410b of the clamping ring 410. The middle of the first fastener plate 421 is hinged to the second circumferential end of the second fastener plate 422. The first circumferential end of the first fastener plate 421 is used for the operator to dial. The clamping portion 412 is a protruding structure protruding from the outer surface of the clamping ring 410. The first circumferential end of the second fastener plate 422 has a clamping hole 4221 for buckling with the clamping portion 412. It should be noted that the middle of the first fastener plate 421 refers to the portion between the first circumferential end and the second circumferential end of the first fastener plate 421.

[0050] The clamping portion 412 can be a hook-shaped protrusion structure, such as the "L" shape shown in Figure 5. This configuration can prevent the fastener 420 from falling off the clamping portion 412 when the fastener 420 is rotated in the opposite direction to bring the opposite sides of the opening 411 of the clamping ring 410 closer and shrink.

[0051] 5, the first buckle plate 421 and the second buckle plate 422 are both arc-shaped, and the first buckle plate 421 and the second buckle plate 422 can be adapted to fit the outer surface of the clamping ring 410; when the clamping portion 412 is buckled with the clamping hole 4221, and the first buckle plate 421 is rotated to fit the outer surface of the clamping ring 410, the second buckle plate 422 is positioned by the first buckle plate 421 to prevent the inner diameter of the blood vessel clamping cavity 413 from increasing. The arc-shaped first buckle plate 421 and the second buckle plate 422 are conducive to making the overall structure of the clamping assembly 400 more compact and occupying less space.

[0052] Continuing to refer to FIG5 , the outer surface of the clamping ring 410 is provided with a protruding hinge seat 414, and the second buckle plate 422 is provided with an avoidance hole 4222. When the second buckle plate 422 rotates to fit with the outer surface of the clamping ring 410, the avoidance hole 4222 can avoid the hinge seat 414. During the clamping process, when the first buckle plate 421 rotates toward the clamping ring 410, after the first buckle plate 421 fits with the clamping ring 410, the hinge seat 414 of the first buckle plate 421 and the clamping ring 410 protrudes outward and is just accommodated in the avoidance hole 4222, making the overall structure of the clamping assembly 400 more compact and occupying less space.

[0053] Continuing to refer to FIG5 , the clamping assembly 400 may further include a connecting ring 430 connected to the clamping ring 410, and the connecting ring 430 is connected to the protection tube of the artificial blood vessel 200. In particular, referring to FIG5 , the outer wall of the connecting ring 430 is provided with a clamping portion 431, and the connecting ring 300 is clamped with the protection tube of the artificial blood vessel 200 through the clamping portion 431. The clamping portion 431 may be a groove, a through hole, or a protrusion as shown in FIG5 , and the specific structure may be flexibly arranged according to actual conditions.

[0054] In the present application, the sealing ring 300 is a biocompatible structure, that is, the material of the sealing ring 300 is biocompatible, for example, the sealing ring 300 may be 316L stainless steel, or the outer surface of the sealing ring 300 is provided with a biocompatible polymer coating, such as PTFE (polytetrafluoroethylene) or PET (polyethylene glycol terephthalate) and other materials.

[0055] The sealing ring 300 can be made of a deformable metal material, and the deformation of the sealing ring 300 can be used to realize the disassembly and assembly of the sealing ring 300. The sealing ring 300 has an initial form and an extreme form, and the sealing ring 300 can be deformed between the initial form and the extreme form under the action of an external force. The sealing ring 300 is in a straight line shape in the initial form, and in a ring shape as shown in FIG. 1 and FIG. 2 in the extreme form. Before connection, the sealing ring 300 is preset to the initial form; after the artificial blood vessel 200 passes through the blood vessel clamping cavity 413 of the clamping assembly 400 and is sleeved on the outside of the outlet tube 110, the sealing ring 300 in the initial form is placed at the assembly point of the artificial blood vessel 200 and the outlet tube 110, and then an external force is applied to the middle of the sealing ring 300, so that the sealing ring 300 is deformed from the initial form to the extreme form, that is, from a straight line to a ring, and the sealing ring 300 is sleeved on the outside of the artificial blood vessel 200; finally, the clamping ring 410 of the clamping assembly 400 is sleeved on the outside of the sealing ring 300 and the artificial blood vessel 200 is fastened to the outlet tube 110 by toggling the buckle 420. Further, an external force can also be applied to the sealing ring 300, so that the sealing ring 300 is deformed from the extreme form to the initial form. Specifically, an external force is applied from the notch 310, so that the two ends of the notch 310 are expanded in opposite directions, so that the sealing ring 300 is expanded into a straight line.

[0056] 7 , the sealing ring 300 includes a first annular end 300a and a second annular end 300b which are arranged opposite to each other along the axial direction of the sealing ring 300, and the sealing ring 300 has a notch 310 which runs through the first annular end 300a to the second annular end 300b. The notch 310 allows the inner diameter of the sealing ring 300 to be varied to adapt to outlet pipes 110 of different sizes, so as to avoid the sealing ring 300 being unable to be sleeved on the outside of the outlet pipe 110 due to the outlet pipe 110 being too large or the inner diameter of the sealing ring 300 being too small, and when the clamping ring 410 is clamped, the sealing ring 300 will not be arched due to the reduction of the inner diameter, so that the sealing performance of the sealing ring 300 is better.

[0057] In some embodiments of the present application, referring to Fig. 1, the notch 310 of the sealing ring 300 and the opening 411 of the clamping ring 410 are staggered in the circumferential direction of the sealing ring 300. Such an arrangement can further improve the sealing performance of the sealing ring 300 and effectively realize the sealed connection between the artificial blood vessel 200 and the outlet tube 110.

[0058] The width of the notch 310 of the sealing ring 300 (ie, the length along the circumference of the sealing ring 300) can be set according to the diameter of the sealing ring 300 and the diameter of the artificial blood vessel 200, as long as the sealing ring 300 can play a sealing role.

[0059] Referring to FIG. 7 , the notch 310 includes at least an inclined portion, and the extending direction of the inclined portion is inclined relative to the axis of the sealing ring 300, that is, the notch 310 is not parallel to the axis of the sealing ring 300, and the notch 310 is a non-straight notch. The notch 310 is arranged in this way, so that the sealing ring 300 can wrap the artificial blood vessel 200 in all directions, ensuring that the artificial blood vessel 200 is compressed within a range of 360°, and compared with a straight notch 310 (i.e., arranged along the axial direction of the sealing ring 300), the notch 310 is not easy to leak. It should be noted that the dotted line shown in FIG. 7 represents the axis of the sealing ring 300.

[0060] 7 , the angle between the inclined portion of the notch 310 and the axis of the sealing ring 300 is α, wherein 20°≤α≤40°, for example, the angle α can be 20° to 40°, such as 20°, 25°, 30°, 35°, 40°, etc. This can not only effectively ensure that the artificial blood vessel 200 is compressed within a range of 360°, but also facilitate the opening of the notch 310 in the sealing ring 300.

[0061] 7 and 8, the notch 310 includes a first section 311, a second section 312, and a third section 313 that are connected in sequence. In this embodiment, the first section 311 and the third section 313 are tilted relative to the second section 312, and the second section 312 is tilted relative to the axis of the sealing ring 300, that is, the second section 312 is the tilted portion of the notch 310. In one embodiment, the first section 311 and the third section 313 are parallel to the second section 312, and the second section 312 is tilted relative to the axis of the sealing ring 300, that is, the first section 311, the second section 312, and the third section 313 are all tilted portions of the notch 310. In another embodiment, the first section 311 and the third section 313 are tilted relative to the second section 312, and the second section 312 is parallel to the axis of the sealing ring 300, that is, the first section 311 and the third section 313 are all tilted portions of the notch 310. Compared with the straight notch 310 , the curved notch 310 prevents blood from flowing smoothly between the artificial blood vessel 200 and the outlet tube 110 of the ventricular assist device 10 , which can further reduce the probability of leakage between the artificial blood vessel 200 and the outlet tube 110 of the ventricular assist device 10 .

[0062] The second section 312 is in an arc shape or an oblique line shape as shown in FIG7 and FIG8 , which can reduce the probability of blood overflowing through the gap 310 and reduce the probability of leakage between the artificial blood vessel 200 and the outlet tube 110 of the ventricular assist device 10. The shape of the second section 312 can be set according to specific needs.

[0063] As shown in FIG. 7 and FIG. 8 , the first section 311 extends along the axial direction of the sealing ring 300; and / or, the third section 313 extends along the axial direction of the sealing ring 300. For example, the first section 311 and the third section 313 both extend along the axial direction of the sealing ring 300. In this way, it is possible to avoid the formation of sharp corners of the notch 310 at the first end of the sealing ring 300 and the second end of the sealing ring 300, reduce the risk of puncturing the artificial blood vessel 200 when the sealing ring 300 is sleeved on the artificial blood vessel 200, and also reduce the harm to the operator. It should be noted that the first end and the second end of the sealing ring 300 are opposite ends forming the notch 310.

[0064] Referring to FIG. 7 , in this embodiment, the joint of the first section 311 and the first annular end 300a of the sealing ring 300, and the joint of the third section 313 and the second annular end 300b of the sealing ring 300 are both provided with rounded corners. The provision of rounded corners can prevent the notch 310 from forming a right angle at the first end and the second end of the sealing ring 300, further reducing the risk of puncturing the artificial blood vessel 200 when the sealing ring 300 is sleeved on the artificial blood vessel 200, and effectively reducing the harm to the operator. In one embodiment, the joint of the first section 311 and the first annular end 300a of the sealing ring 300 is provided with a rounded corner, and the joint of the third section 313 and the second annular end 300b of the sealing ring 300 is not provided with a rounded corner. In another embodiment, the joint of the first section 311 and the first annular end 300a of the sealing ring 300 is not provided with a rounded corner, and the joint of the third section 313 and the second annular end 300b of the sealing ring 300 is provided with a rounded corner.

[0065] Specifically, referring to FIG8 , the first section 311 includes a first side edge 3111 and a second side edge 3112 that are arranged opposite to each other, and a rounded corner is provided at the junction of the first side edge 3111 and the first annular end 300a of the sealing ring 300, and a rounded corner is provided at the junction of the second side edge 3112 and the first annular end 300a of the sealing ring 300. Similarly, the third section 313 includes a third side edge 3131 and a fourth side edge 3132 that are arranged opposite to each other, and a rounded corner is provided at the junction of the third side edge 3131 and the second annular end 300b of the sealing ring 300, and a rounded corner is provided at the junction of the fourth side edge 3132 and the second annular end 300b of the sealing ring 300. The above rounded corners can reduce the risk of puncturing the artificial blood vessel 200 when the sealing ring 300 is sleeved on the artificial blood vessel 200, and effectively reduce the harm to the operator.

[0066] Continuing to refer to FIG. 7 and FIG. 8 , the axial length of the first section 311 is L1, the axial length of the third section 313 is L2, and the axial length d of the sealing ring 300, wherein: 0.15≤L1 / d≤0.85; and / or, 0.15≤L2 / d≤0.85. In this embodiment, L1 / d and L2 / d can both be 0.15, 0.25, 0.35, 0.45, 0.55, 0.65, 0.75, 0.85, etc. By setting L1 / d and L2 / d in this way, it is possible to ensure that the first section 311 and the third section 313 have sufficient axial lengths, and on the basis of ensuring sealing, it is possible to further avoid the first annular end 300a and the second annular end 300b of the sealing ring 300 from forming sharp corners, thereby reducing damage to the operator. In one embodiment, 0.15≤L1 / d≤0.85, and L2 / d is not between 0.15 and 0.85. In another embodiment, L1 / d is not between 0.15 and 0.85, and 0.15≤L2 / d≤0.85.

[0067] In summary, the ventricular assist device 10 provided in the present application can achieve a sealed connection between the artificial blood vessel 200 and the outlet tube 110 by disposing a sealing ring 300 between the clamping assembly 400 and the artificial blood vessel 200; the sealing ring 300 has a notch 310 that penetrates its own ring wall, and the notch 310 allows the inner diameter of the sealing ring 300 to be changed to adapt to outlet tubes 110 of different sizes, thereby avoiding the sealing ring 300 being unable to be sleeved on the outside of the outlet tube 110 due to the outlet tube 110 being too large or the inner diameter of the sealing ring 300 being too small, and when the clamping assembly 400 is clamped, the sealing ring 300 will not bulge due to the reduction in the inner diameter, so that the sealing ring 300 has better sealing performance and can avoid blood leakage between the artificial blood vessel 200 and the outlet tube 110.

[0068] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A ventricular assist device, characterized in that: include: A pump body (100), wherein the pump body (100) is provided with an outlet pipe (110); An artificial blood vessel (200), the artificial blood vessel (200) comprising a main pipe section and a fixed section connected to the main pipe section, the fixed section being sleeved on the outlet pipe (110); A sealing ring (300), the sealing ring (300) being sleeved on the fixed section, the sealing ring (300) comprising a first annular end (300a) and a second annular end (300b) being arranged opposite to each other along the axial direction of the sealing ring (300), a notch being provided on the annular wall of the sealing ring (300), the notch extending along the axial direction of the sealing ring and penetrating the first annular end (300a) and the second annular end (300b); and A clamping assembly (400) is arranged on the outer peripheral surface of the sealing ring (300), and the clamping assembly (400) can adjust the width of the notch (310) to lock the sealing ring (300) to the artificial blood vessel (200).

2. The ventricular assist device according to claim 1, characterized in that: The notch (310) comprises at least an inclined portion, and an extending direction of the inclined portion is inclined relative to an axis of the sealing ring (300).

3. The ventricular assist device according to claim 2, characterized in that: The angle between the inclined portion and the axis of the sealing ring (300) is α, wherein 20°≤α≤40°.

4. The ventricular assist device according to claim 1, wherein: The gap (310) comprises a first section (311), a second section (312) and a third section (313) which are connected in sequence, wherein: The first section (311) and the third section (313) are arranged obliquely relative to the second section (312); And / or, the second section (312) is arranged obliquely relative to the axis of the sealing ring (300).

5. The ventricular assist device according to claim 4, characterized in that: The second section (312) is in the shape of an oblique line or an arc.

6. The ventricular assist device according to claim 4, characterized in that: The first section (311) extends along the axial direction of the sealing ring (300); and / or the third section (313) extends along the axial direction of the sealing ring (300).

7. The ventricular assist device according to claim 4, characterized in that: A rounded corner is provided at a joint between the first section (311) and the first annular end (300a) of the sealing ring (300); and / or a rounded corner is provided at a joint between the third section (313) and the second annular end (300b) of the sealing ring (300).

8. The ventricular assist device according to claim 4, characterized in that: The axial length of the first section (311) is L1, the axial length of the third section (313) is L2, and the axial length of the sealing ring (300) is d, wherein: 0.15≤L1 / d≤0.85; And / or, 0.15≤L2 / d≤0.

85.

9. The ventricular assist device according to any one of claims 1 to 8, characterized in that: The sealing ring is a biocompatible structure; and / or the sealing ring has an initial form and an extreme form, and the sealing ring can be deformed between the initial form and the extreme form, wherein the sealing ring is linear in the initial form and annular in the extreme form.

10. The ventricular assist device according to any one of claims 1 to 8, characterized in that: The clamping assembly (400) comprises a clamping ring (410) and a buckling member (420); the clamping ring (410) has an opening (411); the opening (411) is formed by a first circumferential end (410a) and a second circumferential end (410b) arranged opposite to each other along the circumference of the clamping ring (410); a clamping portion (412) is arranged on the first circumferential end (410a) of the clamping ring (410); the buckling member (420) is arranged on the second circumferential end (410b) of the clamping ring (410) and can be buckled with the clamping portion (412) to reduce the width of the opening (411); The opening (411) of the clamping ring (410) and the notch (310) of the sealing ring (300) are offset in the circumferential direction of the sealing ring (300).

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