Ventricular assist device

Abstract

This application relates to a ventricular assist device (VAD), which includes a pump body and a motor. The pump body includes a pump housing and an outlet tube, with the outlet tube disposed on the outer peripheral surface of the pump housing and extending outward from the outer peripheral surface. The motor and pump body are arranged along the axial direction of the VAD. The motor includes a housing and a cable outlet assembly. The housing is connected to the pump housing, and the cable outlet assembly is disposed on the housing. The cable outlet assembly extends from the housing along the outer peripheral surface of the housing in a bent direction away from the outlet tube. This allows the cable outlet assembly to protrude radially with a smaller height relative to the outer peripheral surface of the housing, thereby reducing the outer diameter and volume of the VAD. This improves the ease of implantation and wearing comfort of the VAD, and also prevents the swaying of the cable within the cable outlet assembly from interfering with the artificial blood vessel connected to the outlet tube, thus achieving stable blood pumping by the VAD.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a ventricular assist device. Background Technology

[0002] A ventricular assist device (VAM) is a device that assists heart failure patients in pumping blood. Blood flows out after the impeller of the VAM performs work, ensuring that the blood flow and perfusion pressure required by the patient are met. Traditional VAMs are relatively large, which hinders implantation. Summary of the Invention

[0003] One of the technical problems addressed by this application is how to reduce the size of ventricular assist devices.

[0004] This application provides a ventricular assist device, comprising:

[0005] A pump body, comprising a pump casing and an outlet pipe, the outlet pipe being disposed on the outer peripheral surface of the pump casing and extending outward from the outer peripheral surface of the pump casing; and

[0006] The motor and the pump body are arranged along the axial direction of the pump body; the motor includes a housing and a cable outlet assembly, the housing is connected to the pump housing, the cable outlet assembly is disposed on the housing, and the cable outlet assembly extends from the housing along the outer peripheral surface of the housing and in a direction away from the outlet pipe.

[0007] In one embodiment, the outlet assembly extends in an involute manner relative to the outer peripheral surface of the housing, and the axis of the pump body is perpendicular to the plane containing the base circle of the involute.

[0008] In one embodiment, the connection point between the lead-out assembly and the housing is the starting point of the involute on the base circle.

[0009] In one embodiment, the outlet assembly includes a connecting end and a free end, the connecting end being connected to the housing, the free end being a distance L from the axis of the pump body, and the radius of the base circle being R, wherein 1 < L / R ≤ 1.5.

[0010] In one embodiment, the housing is provided with a cable outlet hole, the cable outlet assembly passes through the cable outlet hole, and the cable outlet assembly is connected to the inner peripheral surface of the housing.

[0011] In one embodiment, the housing is further provided with a positioning groove, the cable outlet assembly contacts the bottom surface of the positioning groove, the positioning groove is recessed from the inner peripheral surface of the housing toward the outer peripheral surface of the housing, and the positioning groove is arranged around the cable outlet hole.

[0012] In one embodiment, the housing and the pump housing form a receiving cavity, and the cable outlet assembly includes a first cable outlet and a second cable outlet connected to each other, the first cable outlet being located outside the receiving cavity, and the second cable outlet being at least partially located inside the receiving cavity.

[0013] In one embodiment, the cable outlet assembly further includes a cable outlet plate, wherein the first cable outlet portion and the second cable outlet portion are connected to opposite sides of the cable outlet plate, the cable outlet plate is connected to the side peripheral wall of the housing, and the cable outlet plate extends outward from the edges of the first cable outlet portion and the second cable outlet portion.

[0014] In one embodiment, the motor further includes an induction circuit board disposed within the accommodating cavity, the induction circuit board being disposed opposite to the surface of the pump housing that forms the accommodating cavity, and the surface of the second outlet portion facing away from the first outlet portion corresponding to the outline of the induction circuit board.

[0015] In one embodiment, the outer casing and the pump casing form a receiving cavity, and the cable outlet assembly includes a cable outlet shell, which has a cable passage hole communicating with the receiving cavity. The cable passage hole is capable of accommodating a cable. The cable outlet shell also includes a cable outlet tube, which is located outside the receiving cavity and surrounds the cable passage hole. The extension direction of the cable outlet tube is consistent with the extension direction of the cable outlet shell.

[0016] In one embodiment, the cable outlet assembly further includes a sleeve fitted over the cable outlet tube to secure the cable housed in the cable passage hole within the cable outlet tube, wherein the extension direction of the sleeve is consistent with the extension direction of the cable outlet tube.

[0017] In one embodiment, the cross-sectional area of ​​the sleeve gradually decreases along the direction away from the outlet pipe.

[0018] In one embodiment, the sleeve includes a first pipe segment and a second pipe segment connected together. The first pipe segment is sleeved on the outlet pipe, and the outer peripheral surface of the first pipe segment is connected to the outlet shell. The first pipe segment has a stepped surface surrounding the second pipe segment, and the stepped surface is flush with the end face of the outlet pipe.

[0019] In one embodiment, the outlet housing further includes a transition protrusion protruding from the outer peripheral surface of the outlet housing, the transition protrusion being connected to the first pipe segment, and the top surface of the transition protrusion smoothly transitioning to the outer peripheral surface of the first pipe segment.

[0020] One technical advantage of one embodiment of this application is that, given that the outgoing cable assembly extends from the outer casing along its outer periphery and away from the outlet tube, the outgoing cable assembly can protrude radially with a smaller height relative to the outer periphery of the casing. With the same total length, the outgoing cable assembly has a smaller radial dimension in the ventricular assist device, thereby reducing the outer diameter and overall volume of the ventricular assist device. This improves both the ease of implantation and the comfort of wearing the ventricular assist device. Compared to traditional ventricular assist devices where the outgoing cable assembly extends towards the outlet tube, this application extends the outgoing cable assembly from the outer periphery of the casing away from the outlet tube. This avoids interference from the swaying of the cable within the outgoing cable assembly to the artificial blood vessel connected to the outlet tube, ensuring stable blood pumping by the ventricular assist device. Furthermore, it results in a more uniform radial weight distribution, facilitating implantation and installation, improving installation stability, and enhancing the overall appearance consistency of the ventricular assist device. Attached Figure Description

[0021] Figure 1 A schematic diagram of the ventricular assist device provided in this application.

[0022] Figure 2 for Figure 1 The diagram shows the structure of the motor in the ventricular assist device.

[0023] Figure 3 for Figure 2 A partial exploded view of the motor shown.

[0024] Figure 4 for Figure 3 A magnified view of a portion at point A.

[0025] Figure 5 for Figure 1 Top view of the housing, cable outlet assembly, and cables of the ventricular assist device shown.

[0026] Figure 6 for Figure 1 An exploded view of the output components and cables of the ventricular assist device shown.

[0027] Figure 7 for Figure 1 The diagram shows the assembly of the outgoing components and cables of the ventricular assist device.

[0028] Figure 8 for Figure 7 A cross-sectional view along the BB direction.

[0029] Figure 9 for Figure 8 A magnified view of a section at point C.

[0030] Figure 10 for Figure 1 Another assembly diagram of the output components and cables of the ventricular assist device shown.

[0031] Figure 11 for Figure 1 The diagram shows the structural structure of the outlet shell of the ventricular assist device from one perspective.

[0032] Figure 12 for Figure 11 The diagram shows the structure of the cable outlet shell from another perspective.

[0033] Figure 13 for Figure 2 Another structural diagram of the motor shown.

[0034] Figure 14 for Figure 13 The diagram shows the structure of the motor after the outer casing has been removed.

[0035] Figure 15 for Figure 1 The diagram shows the assembly of the control circuit board and the support components of the ventricular assist device. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, 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 possible implementation.

[0042] The inventors of this application have discovered that, in traditional ventricular assist devices, the outlet housing of the motor is connected to the outer casing of the motor. The outlet housing extends radially along the ventricular assist device and protrudes a certain height relative to the outer casing, resulting in a large radial dimension of the entire ventricular assist device. Consequently, the overall volume of the ventricular assist device is large, which is not conducive to the implantation of the ventricular assist device and affects the comfort of the patient wearing it.

[0043] To address at least some of the aforementioned problems, this application proposes a ventricular assist device (VAD). The VAD includes a pump body and a motor. A cable outlet assembly of the motor extends from the motor housing along the outer circumferential surface of the housing, curving away from the outlet pipe. This design minimizes the radial dimension of the cable outlet assembly while maintaining the same total length, thereby reducing the outer diameter and overall volume of the VAD. This improves both the ease of implantation and the comfort of wearing the VAD. The VAD provided in this application will be described in detail below with reference to specific embodiments and accompanying drawings.

[0044] See Figure 1 , Figure 2 and Figure 3 One embodiment of this application provides a ventricular assist device 100 including a pump body 110 and a motor 120. The motor 120 and the pump body 110 are arranged along the axial direction of the pump body 110. The pump body 110 includes a pump casing 111, an inlet pipe 112, an outlet pipe 113, and an impeller (not shown). The axis of the pump body 110 can also be understood as the axis of the inlet pipe 112. The inlet pipe 112 and the outlet pipe 113 are both disposed on the pump casing 111, wherein the outlet pipe 113 is disposed on the outer peripheral surface 1112 of the pump casing 111, and the impeller is housed within the pump casing 111. The motor 120 includes a housing 200 and a cable outlet assembly 300. The housing 200 is connected to the pump housing 111, and the cable outlet assembly 300 is disposed on the housing 200. For example, the cable outlet assembly 300 is connected to the outer peripheral surface 212 of the housing 200 and can protect the cable disposed in the cable outlet assembly 300. When the motor 120 drives the impeller to rotate, the liquid will flow from the inlet pipe 112 into the pump housing 111 and out from the outlet pipe 113, thereby realizing the pumping function of the ventricular assist device 100 for liquid.

[0045] In some embodiments, the outlet pipe 113 extends outward from the outer peripheral surface 1112 of the pump housing 111. For example, the outlet pipe 113 extends a certain length from the outer peripheral surface 1112 of the pump housing 111 in an involute manner. Compared with the outlet pipe 113 extending radially along the ventricular assist device 100, the length occupied by the outlet pipe 113 in the radial direction of the ventricular assist device 100 can be reduced while the total length of the outlet pipe 113 is the same. This can also be understood as reducing the radial protrusion length of the outlet pipe 113 relative to the outer casing 200, thereby reducing the radial dimension of the entire ventricular assist device 100, and ultimately reducing the outer diameter and volume of the ventricular assist device 100.

[0046] See Figure 1 and Figure 2In some embodiments, the outer shell 200 and the pump housing 111 form a receiving cavity 210. Obviously, the outer peripheral surface 212 of the outer shell 200 is located outside the receiving cavity 210. The outgoing cable assembly 300 is connected to the outer peripheral surface 212 of the outer shell 200. The outgoing cable assembly 300 extends from the outer shell 200 along the outer peripheral surface 212 of the outer shell 200 and away from the outlet tube 113. This makes the extension direction of the outgoing cable assembly 300 form a certain angle with the radial direction of the ventricular assist device 100. The radial protrusion of the entire outgoing cable assembly 300 relative to the outer peripheral surface 212 of the outer shell 200 is small. With the same total length of the outgoing cable assembly 300, the radial dimension of the entire ventricular assist device 100 is smaller, thereby reducing the outer diameter and volume of the entire ventricular assist device 100 and improving the convenience of implantation and the comfort of wearing the ventricular assist device 100.

[0047] See Figures 2 to 4 The outer casing 200 is provided with a cable outlet hole 220, and the cable outlet assembly 300 passes through the cable outlet hole 220. The cable outlet assembly 300 is connected to the inner peripheral surface 211 of the outer casing 200, wherein the connection method can be adhesive or welding. Since the cable outlet assembly 300 is connected to the inner peripheral surface 211 of the outer casing 200, glue or weld metal can be prevented from being exposed on the outer peripheral surface 212 of the outer casing 200, which can reduce the growth of bacteria in glue or welds, and can also improve the overall consistency of the ventricular assist device 100 in appearance.

[0048] In some embodiments, a positioning groove 230 is provided on the inner peripheral surface 211 of the housing 200. The positioning groove 230 is recessed from the inner peripheral surface 211 of the housing 200 toward the outer peripheral surface 212 of the housing 200, so that the positioning groove 230 does not penetrate the housing 200, and therefore the positioning groove 230 is a blind groove. A wire outlet hole 220 is recessed on the bottom wall surface of the positioning groove 230. The wire outlet hole 220 penetrates the housing 200, so that the wire outlet hole 220 has an opening on the outer peripheral surface 212 of the housing 200. Obviously, when the housing 200 exists alone, one end of the wire outlet hole 220 is connected to the outside, and the other end of the wire outlet hole 220 is connected to the receiving cavity 210. The positioning groove 230 can be arranged around the wire outlet hole 220, and the bottom surface of the positioning groove 230 forms an annular positioning surface 231, which surrounds the wire outlet hole 220.

[0049] See Figure 5 In this embodiment, the outlet assembly 300 extends in an involute manner relative to the outer peripheral surface 212 of the housing 200, and the axis 11 of the pump body 110 is perpendicular to the base circle d of the involute. b The plane in which the wire assembly 300 is located makes the outer surface of the output assembly smoother, avoiding bending and sharp edges, which facilitates the implantation and installation of the ventricular assist device 100 and improves the appearance consistency of the ventricular assist device 100.

[0050] When the connection between the outgoing component 300 and the housing 200 is not an involute curve at the base circle d b At the starting point, the lead-out assembly 300 first protrudes radially by a certain height, and then extends along an involute curve, thus increasing the radial dimension of the lead-out assembly 300 in the ventricular assist device 100. In this embodiment, the connection between the lead-out assembly 300 and the housing 200 is an involute curve at the base circle d. b Since the starting point is fixed, the total length of the first outlet section 321 can be further reduced in the radial dimension of the first outlet section 321 in the ventricular assist device 100, thereby reducing the outer diameter and volume of the ventricular assist device 100.

[0051] The cable outlet assembly 300 includes a connecting end 311 and a free end 312. The connecting end 311 is connected to the housing 200, and the free end 312 is the end of the cable outlet assembly 300 away from the housing 200. In this embodiment, the distance from the free end 312 to the axis 11 of the pump body 110 is L, and the base circle d b The radius is R, where 1 < L / R ≤ 1.5, and the difference between L and R is the distance from the free end 312 to the base circle d. b The minimum distance, i.e., L is greater than R. And L / R≤1.5, allows the outgoing cable assembly 300 to extend a suitable length relative to the outer shell. While satisfying the protection of the cables inside the outgoing cable assembly 300, it reduces the height of the free end 312 of the outgoing cable assembly 300 protruding radially along the ventricular assist device 100, thereby reducing the volume of the ventricular assist device 100.

[0052] See 2 and Figure 3 The cable outlet assembly 300 includes a cable outlet housing 320, which includes a first cable outlet portion 321 and a second cable outlet portion 322. The first cable outlet portion 321 and the second cable outlet portion 322 are connected to each other, and their structures can be substantially the same. The first cable outlet portion 321 is located outside the receiving cavity 210, and the second cable outlet portion 322 is at least partially located inside the receiving cavity 210. Since the second cable outlet portion 322 is at least partially located inside the receiving cavity 210, it allows the second cable outlet portion 322 to make full use of the existing space of the receiving cavity 210, avoiding an increase in the radial dimension of the ventricular assist device 100 due to the entire second cable outlet portion 322 being located outside the receiving cavity 210, thereby reducing the radial dimension of the ventricular assist device 100 and ultimately reducing the volume of the ventricular assist device 100.

[0053] In this embodiment, the connecting end 311 is disposed at the first outlet portion 321. The outer surface of the first outlet portion 321 extends from the connecting end 311 along an involute trajectory, such that the outer surface of the first outlet portion 321 extends at a large angle relative to the radial direction of the ventricular assist device 100. On the one hand, given a fixed total length of the first outlet portion 321, compared to the radial extension of the outer surface of the first outlet portion 321 along the ventricular assist device 100, the radial dimension of the first outlet portion 321 in the ventricular assist device 100 can be reduced, thereby reducing the outer diameter and volume of the entire ventricular assist device 100. On the other hand, since the outlet tube 113 also extends in an involute manner, and the first outlet portion 321 bends and extends from the outer peripheral surface 212 of the outer shell 200 in a direction away from the outlet tube 113, the radial weight distribution of the ventricular assist device 100 can be made more uniform, facilitating the implantation and installation of the ventricular assist device 100, and also helping to improve the appearance consistency of the ventricular assist device 100.

[0054] See Figure 2 , Figure 3 and Figure 4 The cable outlet housing 320 also includes a cable outlet plate 323. A first cable outlet portion 321 and a second cable outlet portion 322 are connected to opposite sides of the cable outlet plate 323. The cable outlet plate 323 is connected to the side peripheral wall of the housing 200, for example, by bonding or welding to the housing 200. The cable outlet plate 323 can be housed in the positioning groove 230 and the cable outlet hole 220. The first cable outlet portion 321 is entirely outside the receiving cavity 210, and the second cable outlet portion 322 is entirely inside the receiving cavity 210. The cable outlet plate 323 contacts the bottom surface (positioning surface 231) of the positioning groove 230, thereby providing radial positioning for the entire cable outlet housing 320 and improving the installation efficiency and accuracy of the cable outlet housing 320.

[0055] In this embodiment, the cable outlet plate 323 extends outward from the edges of the first cable outlet portion 321 and the second cable outlet portion 322, so that when the cable outlet assembly 300 is subjected to tensile force, the outwardly extended portion of the cable outlet plate 323 can abut against the outer casing 200, preventing the cable outlet assembly 300 from separating from the outer casing 200. The outward extension of the cable outlet plate 323 from the edges of the first cable outlet portion 321 and the second cable outlet portion 322 also increases the contact area between the cable outlet shell 320 and the outer casing 200, thereby increasing the connection strength between the cable outlet shell 320 and the outer casing 200. The curvature of the cable outlet plate 323 can be the same as the curvature of the side peripheral wall of the outer casing 200, allowing the cable outlet plate 323 to fit snugly against the outer casing 200, further increasing the connection strength between the two.

[0056] In other embodiments, the second cable outlet 322 can also be fixed in the positioning groove 230 by adhesive bonding. For example, adhesive can be injected into the positioning groove 230, and after the adhesive cures, it will form an adhesive layer, which will fix the second cable outlet 322 to the housing. Without considering the overall consistency of appearance, the positioning groove 230 can also be formed by a recess in the outer peripheral surface 212 of the housing 200, or the positioning groove 230 can be omitted, and the cable outlet plate 323 can be directly fixed to the inner peripheral surface 211.

[0057] See Figure 2 , Figure 6 and Figure 7 In some embodiments, the ventricular assist device 100 further includes a cable 400, which includes an insulating sleeve (not shown) and multiple connecting wires (not shown). The connecting wires are encased in the insulating sleeve, which protects and insulates them. The connecting wires are used for electrical connection to an external power source and a driver within the motor 120; that is, one end of the connecting wire is electrically connected to the external power source, and the other end is electrically connected to the driver. When the external power source supplies power to the driver through the connecting wire, the driver drives the impeller to rotate, thereby enabling the ventricular assist device 100 to pump liquid.

[0058] See Figure 6 and Figure 8 In some embodiments, the cable outlet housing 320 has a cable passage hole 340, which connects to the outside and the receiving cavity 210. The cable passage hole 340 can be formed on the second cable outlet portion 322. The cable outlet housing 320 may also include a fixing member 350, which has a through hole 351. The fixing member 350 is fixed in the cable passage hole 340, so that the through hole 351 also connects to the receiving cavity 210 and the outside. The connecting wire of the cable 400 can be passed through the through hole 351 of the fixing member 350, and the connecting wire can be connected to the fixing member 350 by adhesive bonding. For example, adhesive can be injected into the through hole 351, and after the adhesive cures, an adhesive layer will be formed, which will fix the connecting wire to the fixing member 350.

[0059] See Figure 6 , Figure 11 and Figure 12In some implementations, the outlet housing 320 also includes an outlet tube 360, which is located outside the receiving cavity 210 and surrounds the cable passage hole 340. The cable 400 can be inserted into the outlet tube 360, that is, the outlet tube 360 ​​is sleeved outside the insulation sleeve of the cable 400. The insulation sleeve of the cable 400 can form an interference fit with the lumen of the outlet tube 360, so that the outlet tube 360 ​​can play a certain role in limiting and fixing the cable 400. The extension direction of the outlet tube 360 ​​can be the same as the extension direction of the involute described above. In this way, with a fixed total extension length of the outlet tube 360, the length occupied by the outlet tube 360 ​​in the radial direction of the ventricular assist device 100 can be reduced, thereby reducing the radial length occupied by the entire ventricular assist device 100 and ultimately reducing the volume of the ventricular assist device 100.

[0060] See Figure 8 , Figure 9 and Figure 10 In some embodiments, the cable outlet assembly 300 further includes a sleeve 370, which is fitted over the cable outlet tube 360, with a free end 312 disposed within the sleeve 370. The sleeve 370 can be integrally formed with the cable outlet tube 360, for example, by injection molding. Alternatively, the sleeve 370 and the cable outlet tube 360 ​​can be detachably connected. The sleeve 370 applies a certain compressive force to the cable outlet tube 360 ​​along its radial direction, causing the cable outlet tube 360 ​​to tightly wrap around the cable 400 to secure it. This can be understood as an interference fit between the cable 400 and the cavity of the cable outlet tube 360. Therefore, the sleeve 370 is used to fix the cable 400 inside the cable outlet tube 360, improving the connection strength between the cable 400 and the entire cable outlet housing 320 and reducing the probability of the cable 400 falling off.

[0061] In this embodiment, the cross-sectional area of ​​the sleeve 370 gradually decreases along the direction away from the outlet tube 360, which makes the stiffness of the sleeve 370 gradually decrease along the direction away from the outlet tube 360. This facilitates the bending of the end of the sleeve 370 away from the outlet tube 360 ​​when subjected to external force, reducing the damage of the outlet component 300 to other tissues during the implantation of the ventricular assist device 100 and making the implantation of the ventricular assist device 100 easier.

[0062] See Figure 8 , Figure 9 and Figure 10The sleeve 370 includes a first pipe section 371 and a second pipe section 372. The second pipe section 372 is connected to the end of the first pipe section 371. The first pipe section 371 is sleeved outside the outlet pipe 360. The outer peripheral surface of the first pipe section 371 can be connected to the outlet plate 323 of the outlet housing 320. The outer diameter of the first pipe section 371 can be larger than the outer diameter of the second pipe section 372, so that the first pipe section 371 has a stepped surface 3711. The second pipe section 372 protrudes relative to the stepped surface 3711. The stepped surface 3711 surrounds the second pipe section 372. Obviously, the stepped surface 3711 is an annular surface. The length of the first pipe segment 371 can be approximately equal to the length of the outlet pipe 360. When the first pipe segment 371 is fitted onto the outlet pipe 360, the stepped surface 3711 is flush with the end face 361 of the outlet pipe 360 ​​away from the first outlet part 321. This can also be understood as the stepped surface 3711 and the end face 361 of the outlet pipe 360 ​​being located at... Figure 9 The plane at the dashed line shown makes the distances from the step surface 3711 to the end face 361 of the outlet pipe 360 ​​and the wire hole 340 approximately equal.

[0063] If the length of the first pipe segment 371 is greater than the length of the outlet pipe 360, the stepped surface 3711 is further away from the end face 361 of the outlet pipe 360 ​​relative to the cable passage hole 340. This can be understood as the stepped surface 3711 protruding relative to the end face 361 of the outlet pipe 360. In this case, since the protruding part of the first pipe segment 371 is not supported by a corresponding outlet pipe 360, when the cable 400 swings, the outlet pipe 360 ​​swings along with the cable 400. Because the protruding part of the first pipe segment 371 is unsupported, a gap appears between the protruding part and the second outlet section 322, which can easily allow bacteria to grow in the gap. If the length of the first pipe segment 371 is less than the length of the outlet pipe 360, the stepped surface 3711 is closer to the cable passage hole 340 relative to the end face 361 of the outlet pipe 360. This can be understood as the stepped surface 3711 being recessed relative to the end face 361 of the outlet pipe 360. At this point, since a portion of the outlet conduit 360 near its end face 361 is not fitted by the first conduit segment 371, the connection strength between the cable 400 and the outlet conduit 360 will be reduced. Therefore, when the stepped surface 3711 and the end face 361 of the outlet conduit 360 away from the first outlet portion 321 are flush, on the one hand, the gap between the protruding portion of the first conduit segment 371 and the second outlet portion 322 can be eliminated, reducing bacterial growth; on the other hand, the connection strength between the cable 400 and the outlet conduit 360 can be improved.

[0064] In some embodiments, the extension direction of the sleeve 370 can be the same as the extension direction of the involute described above. In this way, the radial dimension of the sleeve 370 in the ventricular assist device 100 can be reduced while the total extension length of the sleeve 370 is constant, thereby reducing the outer diameter of the entire ventricular assist device 100 and ultimately reducing the volume of the ventricular assist device 100.

[0065] See Figure 2 , Figure 6 and Figure 8 In some embodiments, the outlet housing 320 further includes a transition protrusion 380, which is connected to the first outlet portion 321 and protrudes a certain length from the outer surface of the first outlet portion 321. When the sleeve 370 is fitted onto the outlet pipe 360, the transition protrusion 380 abuts against the end of the sleeve 370, thus providing some support and limiting for the sleeve 370. Furthermore, the top surface of the transition protrusion 380 smoothly transitions to the outer circumferential surface of the first pipe section 371, thereby improving the installation efficiency and accuracy of the sleeve 370.

[0066] See Figure 1 In some embodiments, the outgoing cable assembly 300 bends and extends from the outer peripheral surface 212 of the housing 200 in a direction away from the outlet tube 113. This can be understood as the outgoing cable assembly 300 extending in the opposite direction to the outlet tube 113. This avoids interference from the swaying of the cable 400 with the artificial blood vessel connected to the outlet tube 113, thus achieving stable blood pumping by the ventricular assist device 100. It also makes the radial weight distribution of the ventricular assist device 100 more uniform, facilitating implantation and installation and improving the stability of the ventricular assist device 100 installation. Furthermore, it helps improve the appearance consistency of the ventricular assist device 100.

[0067] See Figure 13 and Figure 14 In some embodiments, the motor 120 further includes a sensing circuit board 600, a control circuit board 700, and a stator 710 disposed within the accommodating cavity 210. The sensing circuit board 600 is disposed opposite to the surface of the pump housing 111 that forms the accommodating cavity 210. The sensing circuit board 600 may include an arc-shaped outline. The surface of the second outlet portion 322 facing away from the first outlet portion 321 corresponds to the outline of the sensing circuit board 600. The correspondence means that the two are roughly the same in shape and have a certain gap between them. For example, the surface of the second outlet portion 322 facing away from the first outlet portion 321 and the outline of the sensing circuit board 600 are both arc-shaped. The surface of the second outlet portion 322 facing away from the first outlet portion 321 and the outline of the sensing circuit board 600 are arranged radially along the ventricular assist device 100. In this way, the second outlet portion 322 can make full use of the receiving space within the accommodating cavity 210, thereby reducing the outer diameter of the ventricular assist device 100.

[0068] The stator 710 is arranged along the axial direction of the induction circuit board 600. The control circuit board 700 is electrically connected to the induction circuit board 600. The control circuit board 700 is located on the periphery of the stator and does not extend beyond the induction circuit board 600; that is, the upper end of the control circuit board 700 cannot be located above the induction circuit board 600. This effectively prevents the stator 710 from being located between the induction circuit board 600 and the control circuit board 700 along the axial direction of the pump body 110, reducing the axial dimensions of the induction circuit board 600, control circuit board 700, and stator 710 as a whole in the ventricular assist device 100, thereby reducing the thickness of the ventricular assist device 100 and ultimately reducing its volume.

[0069] See Figure 14 and Figure 15 The sensing circuit board 600 is equipped with a sensor. The cross-section of the control circuit board 700 can be smaller than that of the sensing circuit board 600, meaning the coverage area of ​​the control circuit board 700 is smaller than that of the sensing circuit board 600. The motor 120 also includes a carrier 720 located within the accommodating cavity 210. Multiple control circuit boards 700 can be included. All control circuit boards 700 are electrically connected to each other and can be uniformly mounted on the carrier 720, which serves as a support for fixing all control circuit boards 700. The carrier 720 has carrier grooves 721, the number of which is equal to the number of control circuit boards 700, ensuring a one-to-one correspondence between each slot and control circuit board 700. Different control circuit boards 700 are paired with different carrier grooves 721, which limit and fix the control circuit boards 700. Replacing the multiple control circuit boards 700 with a single, large-area circuit board would result in a smaller axial dimension of the ventricular assist device 100, hindering the reduction of its thickness and volume. The aforementioned embodiment uses multiple smaller-area control circuit boards 700, each with a smaller axial dimension, thus reducing the thickness and volume of the ventricular assist device 100. The carrier 720 contacts the housing 200 and can be made of metal. Heat generated by the control circuit boards 700 can be transferred to the housing 200 through the carrier 720, thereby improving the heat dissipation of the ventricular assist device 100.

[0070] The motor 120 may also include a connecting circuit board 800, which can be integrally formed with the sensing circuit board 600. The connecting circuit board 800 is electrically connected to each control circuit board 700, enabling signal transmission between the control circuit board 700 and the sensing circuit board 600 through the connecting circuit board 800. During operation, the sensor can sense and detect the impeller's rotational speed and suspension height. The sensor transmits the detection information to the control circuit board 700 through the sensing circuit board 600 and the connecting circuit board 800. The control circuit board 700 adjusts and controls the impeller's rotational speed and suspension height based on the detection information.

[0071] In summary, the ventricular assist device 100 provided in this application, given that the cable outlet assembly 300 extends and bends along the length direction of the cable outlet assembly 300 towards the outer peripheral surface 212 of the outer shell 200, allows the entire cable outlet assembly 300 to protrude radially with a smaller height relative to the outer peripheral surface 212 of the outer shell 200. With the same total length of the cable outlet assembly 300, the radial dimension of the cable outlet assembly 300 in the ventricular assist device 100 is smaller, thereby reducing the outer diameter of the ventricular assist device 100 and also reducing the overall volume of the ventricular assist device 100. This improves both the ease of implantation of the ventricular assist device 100 and the comfort of wearing the ventricular assist device 100. Compared to traditional ventricular assist devices where the outgoing cable assembly extends towards the outlet tube, this application extends the outgoing cable assembly 300 from the outer peripheral surface 212 of the housing 200 away from the outlet tube 113. This avoids interference from the swaying of the cable 400 within the outgoing cable assembly 300 on the artificial blood vessel connected to the outlet tube 113, thus ensuring stable blood pumping by the ventricular assist device 100. Furthermore, it results in a more uniform radial weight distribution for the ventricular assist device 100, facilitating implantation and installation and improving installation stability. Finally, it also improves the overall appearance consistency of the ventricular assist device 100.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0073] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A ventricular assist device, characterized by, include: The pump body includes a pump casing and an outlet pipe, the outlet pipe being disposed on the outer peripheral surface of the pump casing and extending outward from the outer peripheral surface of the pump casing; and The motor and the pump body are arranged along the axial direction of the pump body; the motor includes a housing and a cable outlet assembly, the housing is connected to the pump housing, the cable outlet assembly is disposed on the housing, and the cable outlet assembly extends from the housing along the outer peripheral surface of the housing and in a direction away from the outlet pipe; The outer casing and the pump casing form a receiving cavity. The cable outlet assembly includes a cable outlet shell, which has a cable passage hole communicating with the receiving cavity. The cable passage hole can accommodate a cable. The cable outlet shell also includes a cable outlet tube, which is located outside the receiving cavity and surrounds the cable passage hole. The cable outlet assembly further includes a sleeve, which is fitted onto the cable outlet tube to fix the cable housed in the cable passage hole inside the cable outlet tube. The extension direction of the sleeve is consistent with the extension direction of the cable outlet tube.

2. The ventricular assist device of claim 1, wherein, The outlet assembly extends in an involute manner relative to the outer peripheral surface of the housing, and the axis of the pump body is perpendicular to the plane containing the base circle of the involute.

3. The ventricular assist device of claim 2, wherein, The connection point between the lead-out assembly and the outer casing is the starting point of the involute on the base circle.

4. The ventricular assist device of claim 2, wherein, The outlet assembly includes a connecting end and a free end, the connecting end is connected to the housing, the distance from the free end to the axis of the pump body is L, and the radius of the base circle is R, where 1 < L / R ≤ 1.

5.

5. The ventricular assist device of claim 1, wherein, The outer casing is provided with a cable outlet hole, the cable outlet assembly passes through the cable outlet hole, and the cable outlet assembly is connected to the inner circumferential surface of the outer casing.

6. The ventricular assist device of claim 5, wherein, The housing is also provided with a positioning groove, the cable outlet assembly contacts the bottom surface of the positioning groove, the positioning groove is recessed from the inner peripheral surface of the housing toward the outer peripheral surface of the housing, and the positioning groove is arranged around the cable outlet hole.

7. The ventricular assist device according to claim 1, characterized in that, The outer casing and the pump casing form a receiving cavity. The cable outlet assembly includes a first cable outlet and a second cable outlet connected to each other. The first cable outlet is located outside the receiving cavity, and the second cable outlet is at least partially located inside the receiving cavity.

8. The ventricular assist device of claim 7, wherein, The cable outlet assembly further includes a cable outlet plate, with the first cable outlet and the second cable outlet connected to opposite sides of the cable outlet plate. The cable outlet plate is connected to the side peripheral wall of the housing, and extends outward from the edges of the first cable outlet and the second cable outlet.

9. The ventricular assist device of claim 7, wherein, The motor also includes an induction circuit board disposed within the accommodating cavity. The induction circuit board is disposed opposite to the surface of the pump housing that forms the accommodating cavity, and the surface of the second outlet portion facing away from the first outlet portion corresponds to the outline of the induction circuit board.

10. The ventricular assist device according to claim 1, characterized in that, The motor also includes an induction circuit board and a control circuit board disposed within the accommodating cavity and electrically connected thereto, wherein the upper end of the control circuit board does not extend beyond the induction circuit board.

11. The ventricular assist device of claim 10, wherein, The motor also includes a carrier located within the accommodating cavity, and there are multiple control circuit boards, all of which are electrically connected to each other and are all mounted on the carrier.

12. The ventricular assist device of claim 1, wherein, Along the direction away from the outlet pipe, the cross-sectional area of ​​the sleeve gradually decreases.

13. The ventricular assist device of claim 1, wherein, The sleeve includes a first pipe section and a second pipe section connected together. The first pipe section is sleeved on the outlet pipe. The outer peripheral surface of the first pipe section is connected to the outlet shell. The first pipe section has a stepped surface surrounding the second pipe section. The stepped surface is flush with the end face of the outlet pipe.

14. The ventricular assist device of claim 13, wherein, The outlet housing also includes a transition protrusion protruding from the outer peripheral surface of the outlet housing. The transition protrusion is connected to the first pipe section, and the top surface of the transition protrusion smoothly transitions to the outer peripheral surface of the first pipe section.

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