Ventricular assist device

Abstract

The invention provides a ventricular assist device. The ventricular assist device comprises a pump body and a sensing assembly. The pump body comprises a pump shell and an inlet pipe, and the pump shell is provided with a containing cavity. The inlet pipe is connected with the pump shell and provided with a liquid inlet channel communicated with the containing cavity. The inlet pipe comprises an inner pipe defining a liquid inlet and outlet channel and an outer pipe surrounding the inner pipe, and a pressure measuring hole communicated with the liquid inlet channel is formed in the side wall of the inner pipe; the sensing assembly comprises a sensor, the sensor is arranged between the inner tube and the outer tube, the sensor comprises a sensing part, and the sensing part and the pressure measuring hole are correspondingly arranged, so that the sensor can sense the blood pressure in the liquid inlet channel. According to the ventricular auxiliary device, the sensing part of the sensor corresponds to the pressure measuring hole in the inner tube, so that the sensor can sense the blood pressure in the liquid inlet channel, and the blood flow can be adjusted according to the blood pressure subsequently. The sensor is arranged between the inner tube and the outer tube, so that the sensor can be prevented from influencing implantation of the ventricular auxiliary device.

Description

TECHNICAL FIELD

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

[0002] A ventricular assist device is a device for assisting patients with severe ventricular dysfunction or heart failure to provide a certain blood flow and blood pressure. During the operation of the ventricular assist device, the current blood pressure pumped by the sensor is usually measured to determine whether the ventricular assist device provides appropriate blood flow.

[0003] However, the installation of the sensor of the conventional ventricular assist device affects the implantation of the ventricular assist device, and needs to be improved. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide a ventricular assist device capable of conveniently measuring the blood pressure pumped. The above purpose is achieved by the following technical solutions.

[0005] The present application provides a ventricular assist device, comprising a pump body and a sensing assembly, the pump body comprising a pump shell and an inlet pipe, the pump shell being provided with a receiving cavity; the inlet pipe is connected with the pump shell and has a liquid inlet channel communicating with the receiving cavity; the inlet pipe comprises an inner pipe defining the liquid inlet channel and an outer pipe surrounding the inner pipe, a side wall of the inner pipe being provided with a pressure measuring hole communicating with the liquid inlet channel; the sensing assembly comprises a sensor, the sensor being arranged between the inner pipe and the outer pipe, the sensor comprising a sensing portion, the sensing portion being arranged corresponding to the pressure measuring hole so that the sensor can sense the blood pressure in the liquid inlet channel.

[0006] In an embodiment, the sensing assembly further comprises a diaphragm, the diaphragm being arranged on a side of the sensing portion adjacent to the liquid inlet channel; an inner wall surface of the inner pipe is provided with a mounting groove, the pressure measuring hole penetrating through a groove bottom of the mounting groove, and the diaphragm is mounted in the mounting groove.

[0007] In an embodiment, the liquid inlet channel comprises a liquid inlet section and a liquid flow section in communication, the liquid inlet section being away from the receiving cavity relative to the liquid flow section, and along a direction from the liquid inlet section to the liquid flow section, an inner diameter of the liquid inlet section gradually decreases, an inner diameter of the liquid flow section is constant, and the pressure measuring hole is arranged in the liquid flow section.

[0008] In an embodiment, the liquid inlet channel further comprises a liquid outlet section, the liquid outlet section being arranged on a side of the liquid flow section away from the liquid inlet section, the liquid outlet section communicating with the receiving cavity, and the pressure measuring hole being arranged on a side of the liquid flow section away from the liquid outlet section.

[0009] In one embodiment, the ventricular assist device further comprises a impeller, a driving motor and a controller, the impeller is rotatably arranged in the accommodating cavity; the driving motor is connected to the pump shell, the driving motor is capable of driving the impeller to rotate; the controller is electrically connected to the driving motor and the sensor, so as to control the driving motor to adjust the rotating speed of the impeller according to the blood pressure.

[0010] In one embodiment, the sensing assembly further comprises a cable connecting the sensor and the controller; the driving motor comprises a driving shell connected to the pump shell, the driving shell is provided with a driving cavity spaced from the accommodating cavity, and a first wire hole communicating with the driving cavity, the controller is arranged in the driving cavity; the cable is arranged in the first wire hole.

[0011] In one embodiment, the sensing assembly further comprises a cable connecting the sensor and the controller; the pump shell is provided with an inlet port communicating the accommodating cavity and the liquid inlet channel; the pump shell has a pump top surface facing the inlet pipe, the pump top surface is provided with an outer convex ring surrounding the periphery of the inlet port, the outer convex ring is connected to the outer pipe, and the outer convex ring is provided with a second wire hole for the cable to pass through.

[0012] In one embodiment, the pump shell further has a pump side surface connected to the pump top surface; the pump top surface is provided with a wire accommodating groove, one end of the wire accommodating groove is adjacent to the second wire hole, and the other end of the wire accommodating groove extends radially to be close to the pump side surface, and at least part of the cable is accommodated in the wire accommodating groove; and / or, the outer circumferential surface of the outer convex ring is provided with an expansion groove surrounding the outer periphery of the second wire hole.

[0013] In one embodiment, the inner pipe of the inlet pipe comprises a pipe body and a mounting piece; wherein, the side wall of the pipe body is provided with an assembly opening; the mounting piece is in the form of a cover plate and covers the assembly opening to enclose the liquid inlet channel with the pipe body; the pressure measuring hole is arranged in the mounting piece.

[0014] In one embodiment, the mounting piece has an inner plate surface facing the liquid inlet channel, and the inner plate surface is smoothly transitioned with the inner wall surface of the pipe body; and / or, the mounting piece has an outer plate surface facing away from the liquid inlet channel, and the outer plate surface is smoothly transitioned with the outer wall surface of the pipe body.

[0015] In one embodiment, the inner plate surface of the mounting piece facing the liquid inlet channel is provided with a mounting groove, and the sensing assembly further comprises a diaphragm arranged between the sensing part and the liquid inlet channel, and the diaphragm is mounted in the mounting groove.

[0016] In an embodiment, the ventricular assist device further comprises at least one of the following features: The pressure measuring hole penetrates through the bottom surface of the mounting groove, and the diaphragm covers the pressure measuring hole; The diaphragm is smoothly connected with the inner wall surface of the tube body; The diaphragm is made of titanium or silicon dioxide.

[0017] In an embodiment, the pump shell is provided with a liquid inlet communicating with the accommodation cavity and the liquid inlet channel; the pump shell has a pump top surface facing the inlet pipe, and the pump top surface is provided with an inner convex ring surrounding the periphery of the liquid inlet; the inner tube comprises a tube body and a mounting member arranged in the axial direction, the mounting member is cylindrical and connected between the tube body and the inner convex ring, and the pressure measuring hole is arranged in the mounting member.

[0018] In an embodiment, the inner circumferential surface of the mounting member is farther away from the central axis of the inlet pipe than the inner wall surface of the tube body and the inner wall surface of the inner convex ring, so that the inner circumferential surface of the mounting member is recessed radially outward relative to the inner wall surface of the tube body or the inner wall surface of the inner convex ring to form a mounting groove; the sensing assembly further comprises a diaphragm mounted in the mounting groove, and the diaphragm is smoothly connected with the inner wall surface of the tube body.

[0019] In an embodiment, the outer wall surface of the inner tube is provided with a mounting boss, the pressure measuring hole penetrates through the mounting boss, and the side of the mounting boss away from the liquid inlet channel is provided with a mounting plane; the sensor further comprises a substrate, and the sensing portion is mounted on the substrate, and the substrate is attached to the mounting plane.

[0020] In an embodiment, the outer wall surface of the inner tube comprises a cut plane and a circumferential surface connected with the cut plane and extending in the circumferential direction; the mounting boss is arranged on the circumferential surface; and the mounting plane of the mounting boss is coplanar with the cut plane.

[0021] Compared with the prior art, the ventricular assist device provided by the application is characterized in that the sensing portion of the sensor is arranged corresponding to the pressure measuring hole on the inner tube, so that the blood in the liquid inlet channel can contact the sensing portion of the sensor through the pressure measuring hole, and the sensor can sense the blood pressure in the liquid inlet channel, which facilitates subsequent adjustment of the size of the blood flow according to the blood pressure, thereby facilitating the ventricular assist device to provide appropriate blood flow to meet the needs of the patient for blood flow at different stages. By arranging the sensor between the inner tube and the outer tube, the sensor can be prevented from being exposed outside the inlet pipe, thereby avoiding affecting the implantation of the ventricular assist device; in addition, the arrangement of the sensor between the inner tube and the outer tube can also reduce the influence of external factors on the sensor and prolong the service life of the sensor.

[0022] These aspects or other aspects of the present application will be made clearer in the following embodiment description. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort based on these drawings.

[0024] Figure 1 is a structural schematic diagram of a ventricular assist device provided by the first embodiment of the present application.

[0025] Figure 2 is Figure 1 is a top view of the ventricular assist device shown in

[0026] Figure 3 is Figure 2 is a sectional view of the ventricular assist device shown in along the A-A direction.

[0027] Figure 4 is Figure 1 is an exploded view of the sensing assembly and the pump shell (excluding the second shell) of the ventricular assist device shown in

[0028] Figure 5 is Figure 4 is an exploded view of the sensing assembly and the pump shell (excluding the second shell) in another perspective view.

[0029] Figure 6 is Figure 4 is a structural schematic diagram of the sensing assembly and the pump shell (excluding the outer tube and the second shell).

[0030] Figure 7 is Figure 4 is a front view of the assembly of the sensing assembly and the pump shell (excluding the second shell) of the ventricular assist device shown in

[0031] Figure 8 is Figure 7 is a sectional view of the assembly of the sensing assembly and the pump shell along the B-B direction.

[0032] Figure 9 is Figure 8 is a partial enlarged view of the sectional view of the sensing assembly and the pump shell at P1.

[0033] Figure 10 is Figure 8 is a partial enlarged view of the sectional view of the sensing assembly and the pump shell (after removing the diaphragm) at P1.

[0034] Figure 11 is an assembled view of the pump housing and the sensing assembly (excluding the second housing) shown in FIG. 6. Figure 7 is an assembled view of the pump housing and the sensing assembly (excluding the second housing) shown in FIG. 6.

[0035] Figure 12 is an assembled view of the pump housing and the sensing assembly (excluding the second housing) shown in FIG. 6. Figure 1 is an assembled view of the pump housing and the sensing assembly (excluding the second housing) shown in FIG. 6.

[0036] Figure 13 is an assembled view of the pump housing and the sensing assembly (excluding the second housing) shown in FIG. 6. Figure 12 is an exploded view of the pump housing and the sensing assembly (excluding the second housing) shown in FIG. 6.

[0037] Figure 14 is an exploded view of the pump housing and the sensing assembly (excluding the second housing) shown in FIG. 6. Figure 7 is an exploded view of the pump housing and the sensing assembly (excluding the second housing) shown in FIG. 6.

[0038] Figure 15 is an exploded view of the pump housing and the sensing assembly (excluding the second housing) shown in FIG. 6.

[0039] Figure 16 is an exploded view of the pump housing and the sensing assembly (excluding the second housing) shown in FIG. 6. Figure 15 is an exploded view of the pump housing and the sensing assembly (excluding the second housing) shown in FIG. 6.

[0040] Figure 17 is an exploded view of the pump housing and the sensing assembly (excluding the second housing) shown in FIG. 6. Figure 16 is an exploded view of the pump housing and the sensing assembly (excluding the second housing) shown in FIG. 6.

[0041] Figure 18 is an exploded view of the pump housing and the sensing assembly (excluding the second housing) shown in FIG. 6. Figure 15 is an exploded view of the pump housing and the sensing assembly (excluding the second housing) shown in FIG. 6.

[0042] Figure 19 is an exploded view of the pump housing and the sensing assembly (excluding the second housing) shown in FIG. 6. Figure 18 is an exploded view of the pump housing and the sensing assembly (excluding the second housing) shown in FIG. 6.

[0043] wherein the above figures include the following reference signs: 1, ventricular assist device; 10, pump body; 100, pump shell; 101, pump top surface; 102, pump side surface; 110, accommodation cavity; 130, inlet pipe; 132, liquid inlet channel; 1321, liquid inlet section; 1323, liquid flow section; 1325, liquid outlet section; 134, inner pipe; 1342, mounting boss; 1343, inner wall surface of inner pipe; 1344, mounting plane; 1345, cutting plane; 1346, circumferential surface; 136, outer pipe; 1361, inner wall surface of outer pipe; 137, pipe body; 1372, first annular step; 1373, inner wall surface of pipe body; 139, mounting member; 1391, inner circumferential surface of mounting member; 1392, second annular step; 1393, outer circumferential surface of mounting member; 1396, mounting groove; 1397, groove bottom surface; 1398, pressure measuring hole; 140, accommodation shell; 142, first shell body; 1421, first wire accommodating groove; 144, second shell body; 150, outer protruding ring; 151, second wire hole; 153, second wire accommodating groove; 155, outer circumferential surface of outer protruding ring; 160, inner protruding ring; 161, inner wall surface of inner protruding ring; 170, outlet pipe; 180, accommodation cavity; 120, liquid inlet; 190, impeller; 11, drive motor; 112, drive shell; 1121, drive cavity; 1122, first wire hole; 12, sensing assembly; 121, diaphragm; 124, sensor; 1241, sensing part; 1242, substrate; 126, cable; 128, substrate; 14, controller; 15, magnetic ring DETAILED DESCRIPTION In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the spirit of the present application, and it is therefore intended that the present application not be limited to the embodiments disclosed below.

[0044] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] In addition, the terms "first", "second", and the like, if any, are used herein for descriptive purposes only and should not be construed as indicating or implying relative importance or implicating the number of indicated technical features. Thus, a feature defined with "first", "second" may include at least one of the features explicitly or implicitly. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0046] In the present application, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be interpreted broadly. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] In the present application, unless otherwise explicitly specified and limited, if the first feature is described as "on" or "under" the second feature and the like, it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or it can only mean that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or it can only mean that the first feature is lower than the second feature in horizontal height.

[0048] It should be noted that if an element is referred to as "fixed to" or "disposed to" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

[0049] The inventors of the present application find that the blood flow required by a patient varies at different periods, for example, in the early stage of implanting a ventricular assist device, the ventricular assist device needs to provide a larger blood flow; and as the heart function gradually recovers, the required blood flow will decrease. In order to provide appropriate blood flow, it is necessary to detect the blood pressure or blood flow pumped, however, the measurement of blood pressure or blood flow of the conventional ventricular assist device is difficult, and the installation of the sensor of the conventional ventricular assist device will affect the implantation of the ventricular assist device.

[0050] In order to improve at least part of the above problems, the present application provides a ventricular assist device, by corresponding arrangement of the sensing part of the sensor and the pressure measuring hole on the inner tube, so that the blood in the liquid inlet channel can contact the sensing part of the sensor through the pressure measuring hole, so that the sensor can sense the blood pressure in the liquid inlet channel, and the size of the blood flow can be adjusted according to the blood pressure, so as to facilitate the ventricular assist device to provide appropriate blood flow to meet the needs of the patient for blood flow at different periods. By arranging the sensor between the inner tube and the outer tube, the sensor can be prevented from being exposed outside the inlet tube, so as to avoid affecting the implantation of the ventricular assist device; in addition, the sensor arranged between the inner tube and the outer tube can also reduce the influence of external factors on the sensor and prolong the service life of the sensor. The ventricular assist device provided by the present application will be described in detail below in combination with specific embodiments and the accompanying drawings.

[0051] First embodiment Please refer to Figures 1 to 5 The present embodiment provides a ventricular assist device 1, which comprises a pump body 10 and a sensing assembly 12. The pump body 10 comprises a pump shell 100 and an inlet pipe 130. The pump shell 100 is provided with a receiving cavity 110. The inlet pipe 130 comprises an inner tube 134 defining a liquid inlet channel 132 and an outer tube 136 surrounding the inner tube 134. The side wall of the inner tube 134 is provided with a pressure measuring hole 1398 communicating with the liquid inlet channel 132. The sensing assembly 12 comprises a sensor 124. The sensor 124 is arranged between the inner tube 134 and the outer tube 136. The sensor 124 comprises a sensing part 1241. The sensing part 1241 is arranged corresponding to the pressure measuring hole 1398, so that the sensor 124 can sense the blood pressure in the liquid inlet channel 132. Wherein, the corresponding arrangement of the sensing part 1241 and the pressure measuring hole 1398 means that the whole sensing part 1241 is exposed to the pressure measuring hole 1398, and the sensing part 1241 will not be shielded by the side wall of the inner tube 134, so that the sensing part 1241 can accurately sense the blood pressure.

[0052] The ventricular assist device 1 provided in the present application is provided with a sensor 124, and the sensing part 1241 of the sensor 124 is correspondingly arranged with the pressure measuring hole 1398 on the inner tube 134, so that the blood in the liquid inlet channel 132 can contact the sensing part 1241 of the sensor 124 through the pressure measuring hole 1398, and the sensor 124 can sense the blood pressure in the liquid inlet channel 132, which is convenient for adjusting the blood flow in the subsequent period according to the blood pressure, so as to facilitate the ventricular assist device 1 to provide appropriate blood flow to meet the needs of the patient for blood flow at different times. By arranging the sensor 124 between the inner tube 134 and the outer tube 136, the sensor 124 can be prevented from being exposed outside the inlet tube 130, so as to avoid affecting the implantation of the ventricular assist device 1. In addition, the sensor 124 arranged between the inner tube 134 and the outer tube 136 can also reduce the influence of external factors (such as external force, water vapor, dust, etc.) on the sensor, thereby prolonging the service life of the sensor 124.

[0053] Specifically, the ventricular assist device 1 is an implantable blood pump, which is suitable for being installed to the outer wall of the heart. The inlet tube 130 of the ventricular assist device 1 can penetrate the outer wall of the heart to extend into the heart, so that the pipe opening 131 of the inlet tube 130 is in the heart. The implantable blood pump has large blood flow and longer service life.

[0054] Please refer to Figure 3 The pump body 10 further comprises an outlet pipe 170 in communication with the accommodation cavity 110, and an impeller 190 rotatably arranged in the accommodation cavity 110. The outlet pipe 170 is used for the outflow of liquid, and can be connected with an artificial blood vessel (not shown in the figure). The artificial blood vessel is in communication with the aorta or the pulmonary artery, so that the liquid can flow from the outlet pipe 170 to the aorta or the pulmonary artery through the artificial blood vessel. The accommodation cavity 110 is roughly in the shape of a volute, and the impeller 190 can be suspended in the accommodation cavity 110. The rotation of the impeller 190 can transport the liquid entering through the inlet pipe 130 to the outlet pipe 170. In the embodiment, the impeller 190 is a centrifugal impeller. Through the centrifugal action of the impeller 190, the blood close to the blades of the impeller 190 can be centrifuged out, so as to provide sufficient blood flow.

[0055] Please refer to Figure 3 and Figure 5The liquid inlet channel 132 includes a liquid inlet section 1321 and a liquid flow section 1323 connected in sequence. The liquid inlet section 1321 is farther away from the accommodation cavity 110 than the liquid flow section 1323, that is, the liquid inlet section 1321 is closer to the tube opening 131 than the liquid flow section 1323, and the pressure measuring hole 1398 is arranged on the liquid flow section 1323. In the direction from the liquid inlet section 1321 to the liquid flow section 1323, the inner diameter of the liquid inlet section 1321 gradually decreases, so that the liquid inlet section 1321 is roughly in the shape of a trumpet mouth with a wide outer side and a narrow inner side. The outer side refers to the side close to the tube opening 131, and the inner side refers to the side away from the tube opening 131, so that the blood can flow smoothly into the liquid inlet section 1321 from the tube opening 131. In this embodiment, in the direction from the liquid inlet section 1321 to the liquid flow section 1323, the inner diameter of the liquid flow section 1323 is constant, so that the liquid flow section 1323 is roughly in the shape of a cylinder.

[0056] In this embodiment, the liquid inlet channel 132 further includes a liquid outlet section 1325 arranged on the side of the liquid flow section 1323 away from the liquid inlet section 1321, and the liquid outlet section 1325 is connected to the accommodation cavity 110. As an example, when the liquid enters the liquid inlet channel 132 from the tube opening 131 of the inlet tube 130, it will pass through the liquid inlet section 1321, the liquid flow section 1323 and the liquid outlet section 1325 in sequence, and then flow to the accommodation cavity 110, and finally flow out of the outlet tube 170 under the centrifugal action of the impeller 190, and then flow to the aorta or the pulmonary artery through the artificial blood vessel.

[0057] The inner tube 134 surrounds the liquid inlet channel 132, and the outer tube 136 is sleeved and connected to the inner tube 134. Specifically, one end of the outer tube 136 away from the accommodation cavity 110 can be fixedly connected to one end of the inner tube 134 away from the accommodation cavity 110, and the fixed connection can be welding or bonding.

[0058] Please refer to Figures 4 to 6 The inner tube 134 includes a tube body 137 and a mounting piece 139 arranged in the axial direction. The tube body 137 and the mounting piece 139 cooperate to form the liquid inlet channel 132. Part of the tube body 137 can form the liquid inlet section 1321 of the liquid inlet channel 132, and the mounting piece 139 and the other part of the tube body 137 can form the liquid flow section 1323 of the liquid inlet channel 132.

[0059] In this embodiment, the radial direction refers to the straight line direction of the diameter or radius of the inner tube 134, or the direction perpendicular to the extension direction of the central axis L. The circumferential direction refers to the circumferential direction around the central axis L of the inner tube 134.

[0060] In the embodiment, the mounting member 139 is in a cylindrical shape. The mounting member 139 is connected to the tube body 137 at a side close to the accommodating cavity 110, i.e., the mounting member 139 is connected to the tube body 137 at a side away from the tube opening 131. The mounting member 139 and the tube body 137 can be connected by welding or adhesion, etc. Specifically, the side of the tube body 137 away from the tube opening 131 is provided with a first annular step 1372, the first annular step 1372 faces the liquid inlet channel 132, the side of the mounting member 139 close to the tube opening 131 is provided with a second annular step 1392, the second annular step 1392 faces away from the liquid inlet channel 132, the first annular step 1372 and the second annular step 1392 are matched, which can reduce the gap at the connection between the tube body 137 and the mounting member 139, and compared with the contact between planes, the contact area between the tube body 137 and the mounting member 139 is increased, and the connection strength between the two is increased.

[0061] Please refer to Figures 7 to 10 , the inner circumferential surface 1391 of the mounting member 139 is recessed from the inner wall of the tube body 137 to form a mounting groove 1396 in communication with the liquid inlet channel 132. In the embodiment, the mounting groove 1396 is in a cylindrical shape to match the shape of the mounting member 139, i.e., the mounting groove 1396 is arranged on the entire inner wall of the mounting member 139. In other embodiments, the mounting groove 1396 can also be in a circular arc shape, i.e., the mounting groove 1396 can also be arranged on part of the inner wall of the mounting member 139.

[0062] Please refer to Figures 11 to 14 , the outer wall surface of the inner tube 134 is provided with a mounting boss 1342, specifically, the outer circumferential surface 1393 of the mounting member 139 is provided with the mounting boss 1342, and the mounting boss 1342 can be used for mounting the sensing assembly 12. The pressure measuring hole 1398 penetrates the mounting boss 1342. In the embodiment, the mounting boss 1342 is in a substantially annular shape; in other embodiments, the mounting boss 1342 can also be in a rectangular, elliptical or other shape, which can mount the sensing assembly 12.

[0063] The side of the mounting boss 1342 away from the liquid inlet channel 132 is provided with a mounting plane 1344, the mounting plane 1344 is parallel to the central axis of the inlet pipe 130, and the mounting plane 1344 can be used for mounting the sensing assembly 12. The central axis of the inlet pipe 130 is the central axis L of the inner tube 134.

[0064] The pressure measuring hole 1398 is arranged on the mounting member 139, specifically, the pressure measuring hole 1398 penetrates the mounting boss 1342 and the groove bottom surface 1397 of the mounting groove 1396 Figure 10 , so that the sensing part 1241 extends into the pressure measuring hole 1398.

[0065] The outer wall surface 1343 of the inner tube 134 comprises a tangent plane 1345 and a circumferential surface 1346 connected with the tangent plane 1345 and extending in the circumferential direction, i.e., the tangent plane 1345 and the circumferential surface 1346 form a closed circumferential surface, wherein the cross section of the circumferential surface 1346 is in the shape of a circular arc with a central angle between 270° and 360°, so that the circular arc has an opening; the cross section of the tangent plane 1345 is a straight line, which closes the opening of the circular arc. The mounting boss 1342 is arranged on the circumferential surface 1346; and the mounting plane 1344 of the mounting boss 1342 is coplanar with the tangent plane 1345. The radial distance between the tangent plane 1345 and the inner wall surface 1361 of the outer tube 136 is greater than the radial distance between the circumferential surface 1346 and the inner wall surface 1361 of the outer tube 136, the radial distance between the tangent plane 1345 and the inner wall surface 1361 of the outer tube 136 is defined as L1, and the radial distance between the circumferential surface 1346 and the inner wall surface 1361 of the outer tube 136 is defined as L2, wherein L1>L2, so that a larger space can be obtained in the accommodation cavity 180 to accommodate the sensor 124 and facilitate the wiring of the sensor 124, which is beneficial to the installation of the sensor 124.

[0066] Please continue to refer to Figure 9 and Figure 10 In the embodiment, the sensing portion 1241 can be aligned with the pressure measuring hole 1398, the pressure measuring hole 1398 is substantially a circular hole, the sensing portion 1241 is substantially a flat cylinder, and the alignment of the sensing portion 1241 with the pressure measuring hole 1398 means that the central axis of the sensing portion 1241 and the central axis of the pressure measuring hole 1398 substantially coincide, for example, the central axes of the two can coincide or the distance between the central axes of the two is less than 0.2 mm. Wherein, the central axis of the sensing portion 1241 and the central axis of the pressure measuring hole 1398 both extend in the radial direction of the inner tube 134. In an embodiment, the central axis of the sensing portion 1241 can also be offset from the central axis of the pressure measuring hole 1398; for example, the distance between the central axes of the two is greater than 0.2 mm. In another embodiment, the sensing portion 1241 is substantially a flat cylinder, and the pressure measuring hole 1398 can also be elliptical, rectangular or other shapes, as long as the position of the sensing portion 1241 corresponds to the position of the pressure measuring hole 1398 and at least part of the sensing portion 1241 extends into the pressure measuring hole 1398.

[0067] The sensing assembly 12 further comprises a diaphragm 121, which is arranged at one side of the sensing portion 1241 adjacent to the liquid inlet channel 132, and specifically, the diaphragm 121 is arranged between the sensing portion 1241 and the liquid inlet channel 132, so that the sensing portion 1241 of the sensor 124 can sense the blood pressure received by the diaphragm 121 to obtain the blood pressure in the liquid inlet channel 132. The pressure measuring hole 1398 penetrates the groove bottom of the mounting groove 1396, and the diaphragm 121 is mounted on the mounting groove 1396 of the mounting member 139 and covers the pressure measuring hole 1398, so that the diaphragm 121 can be directly in contact with the blood flowing in the liquid inlet channel 132. When the blood flows through the liquid inlet channel 132, it will contact the diaphragm 121 arranged on the channel wall of the liquid inlet channel 132, and will generate a blood pressure on the diaphragm 121, and avoid the blood in the liquid inlet channel 132 from entering the pressure measuring hole 1398 to cause blood aggregation and thrombosis.

[0068] In the embodiment, the diaphragm 121 is adapted to be mounted in the mounting groove 1396, that is, the thickness of the diaphragm 121 can be equal to the depth of the mounting groove 1396, and the diaphragm 121 is smoothly transitioned with the inner wall surface 1373 of the pipe body 137, so that the diaphragm 121 will not protrude from the inner wall surface 1373 of the pipe body 137, nor will it be recessed in the inner wall surface 1373 of the pipe body 137, which can avoid the occurrence of grooves or protrusions at the joint of the diaphragm 121 and the pipe body 137, thereby avoiding the blood in the liquid inlet channel 132 from entering the grooves or being stopped by the protrusions, and further avoiding the blood aggregation or stagnation caused by thrombosis. In the actual production process, the joint of the diaphragm 121 and the pipe body 137 can be polished to smoothly transition the diaphragm 121 with the inner wall surface 1373 of the pipe body 137.

[0069] In order to be able to transmit the blood pressure to the sensing portion 1241, the diaphragm 121 needs to be deformed under the action of the blood pressure, so that the diaphragm 121 needs to have good elasticity and good strength. In the embodiment, the material of the diaphragm 121 is titanium or silicon dioxide, which has good elasticity and good biocompatibility, so that the diaphragm 121 can efficiently transmit the blood pressure to the sensor 124, and also as much as possible to reduce the damage of the material of the diaphragm 121 to the blood. Titanium or silicon dioxide also has high strength, so that the diaphragm 121 has a long service life.

[0070] Since the inner diameter of the liquid flow section 1323 does not change along the direction from the liquid inlet section 1321 to the liquid flow section 1323, the pressure measuring hole 1398 is arranged in the liquid flow section 1323 and penetrates the bottom of the mounting groove 1396, that is, the mounting groove 1396 is also arranged in the liquid flow section 1323, so that the diaphragm 121 mounted in the mounting groove 1396 is also mounted in the liquid flow section 1323, and the diaphragm 121 is in a cylindrical or arc shape. Compared with being arranged in the trumpet-shaped liquid inlet section 1321 (the diaphragm 121 needs to be correspondingly arranged in a trumpet shape), the shape and size of the diaphragm 121 are better controlled, which is beneficial to the smooth transition of the diaphragm 121 and the inner wall surface 1373 of the pipe body 137.

[0071] In the embodiment, the pressure measuring hole 1398 is arranged on the side of the liquid flow section 1323 away from the liquid outlet section 1325, so that the pressure measuring hole 1398 is closer to the pipe opening 131 of the inlet pipe 130, and the sensing part 1241 of the sensor 124 can be in contact with the blood in the liquid inlet channel 132 earlier, reducing the pressure loss of the blood in the conveying process and improving the accuracy of the measurement result of the sensor 124.

[0072] It should be noted that a soft material (not shown in the figure) is also arranged between the diaphragm 121 and the sensing part 1241. The soft material can be used for pressure conduction. The soft material can be filled between the diaphragm 121 and the sensing part 1241 and in contact with both of them. The blood pressure is conducted to the sensing part 1241 of the sensor 124 through the soft material, so that the sensing part 1241 can sense the blood pressure. Through the conduction of the soft material, the deformation of the diaphragm 121 can be more accurately transmitted to the sensing part 1241 of the sensor 124, increasing the accuracy of detection of the sensing part 1241. In the embodiment, the soft material can be silicone.

[0073] In the embodiment, at least part of the sensing part 1241 extends into the pressure measuring hole 1398 and is spaced apart from the diaphragm 121. In this way, the distance between the sensing part 1241 and the diaphragm 121 is shortened without affecting the deformation of the diaphragm 121, further improving the accuracy of the blood pressure sensed by the sensing part 1241. In other embodiments, the sensing part 1241 can also be located outside the pressure measuring hole 1398, and the pressure conduction between the diaphragm 121 and the sensing part 1241 is realized through the soft material. Please continue to refer to Figures 3 to 5The pump shell 100 has a pump top surface 101 facing the inlet pipe 130, and a pump side surface 102 connected with the pump top surface 101. The pump shell 100 is also provided with a liquid inlet 120 communicating the accommodation cavity 110 and the liquid inlet channel 132, and specifically, the blood in the liquid inlet channel 132 enters the accommodation cavity 110 through the liquid inlet 120. The pump shell 100 further includes an accommodation shell 140 and an outer convex ring 150 which is substantially ring wall-shaped, and the outer convex ring 150 is convexly arranged on the side of the accommodation shell 140 away from the accommodation cavity 110, i.e., the outer convex ring 150 is arranged on the pump top surface 101 and surrounds the periphery of the liquid inlet 120, and the accommodation cavity 110 and the liquid inlet 120 are both arranged on the accommodation shell 140. The inlet pipe 130 is connected to the side of the outer convex ring 150 away from the accommodation shell 140, and specifically, the outer pipe 136 of the inlet pipe 130 is connected with the outer convex ring 150, and the connection manner can be welding or bonding.

[0074] The accommodation shell 140 includes a first shell 142 and a second shell 144 connected with each other, and the first shell 142 and the second shell 144 cooperatively form the accommodation cavity 110, wherein the first shell 142 is provided with the outer convex ring 150, and the second shell 144 is arranged on the side of the first shell 142 away from the inlet pipe 130. The first shell 142 and the second shell 144 can be connected by welding. By arranging the accommodation shell 140 as the first shell 142 and the second shell 144, it is convenient to assemble the impeller 190 in the accommodation cavity 110, and specifically, after the impeller 190 is assembled in one of the first shell 142 and the second shell 144, the first shell 142 and the second shell 144 are fixedly connected, and the installation of the impeller 190 is completed.

[0075] The pump shell 100 further includes an inner convex ring 160 which is substantially ring wall-shaped, and the inner convex ring 160 is convexly arranged on the accommodation shell 140, and the inner convex ring 160 is arranged on the pump top surface 101 and surrounds the periphery of the liquid inlet 120, and the inner convex ring 160 can form the liquid outlet section 1325 of the liquid inlet channel 132. The outer convex ring 150 surrounds the inner convex ring 160, and a magnetic ring 15 can be arranged between the outer convex ring 150 and the inner convex ring 160, and the magnetic ring 15 can cooperate with the magnet in the impeller 190 to provide a force for suspending the impeller 190 in the accommodation cavity 110. The inner convex ring 160 is connected with the inlet pipe 130, and specifically, the inner convex ring 160 is connected with the mounting member 139 of the inlet pipe 130, i.e., the mounting member 139 is connected between the pipe body 137 and the inner convex ring 160. The connection manner between the inner convex ring 160 and the mounting member 139 can be the same as the connection manner between the pipe body 137 and the mounting member 139, i.e., the cooperation is realized by two annular steps, the contact area between the inner convex ring 160 and the mounting member 139 is increased, and thus the connection strength between the inner convex ring 160 and the mounting member 139 is increased.

[0076] The inner circumferential surface 1391 of the mounting member 139 is further away from the central axis of the inlet tube 130 than the inner wall surface 1373 of the tube body 137 and the inner wall surface 161 of the inner convex ring 160, so that the inner circumferential surface 1391 of the mounting member 139 is recessed radially outward relative to the inner wall surface 1373 of the tube body 137 or the inner wall surface 161 of the inner convex ring 160 to form a mounting groove 1396, wherein the depth of the recess is equal to the thickness of the diaphragm 121, so that the diaphragm 121 can smoothly transition with the inner wall surface 1373 of the tube body 137 after being installed in the mounting groove 1396.

[0077] The ventricular assist device 1 further comprises a driving motor 11 and a controller 14. The driving motor 11 is connected to the pump housing 100, and the driving motor 11 can drive the impeller 190 to rotate, so that the blood in the ventricle or atrium can enter the accommodation cavity 110 from the inlet tube 130, and then flow out from the outlet tube 170 through the centrifugal action of the impeller 190, and then flow to the aorta or pulmonary artery through the artificial blood vessel. The controller 14 is electrically connected with the driving motor 11 and the sensor 124, so as to control the driving motor 11 to adjust the rotating speed of the impeller 190 according to the blood pressure. The adjustment of the rotating speed of the impeller 190 will affect the size of the blood flow, so as to facilitate the ventricular assist device 1 to provide appropriate blood flow to meet the needs of the patient for blood flow at different stages.

[0078] The controller 14 is electrically connected with the driving motor 11 and the sensor 124, so as to control the driving motor 11 to adjust the rotating speed of the impeller 190 according to the blood pressure. For example, when it is detected that the blood pressure is too high, the controller 14 can reduce the current or voltage of the driving motor 11 to reduce the rotating speed of the impeller 190, so as to reduce the blood flow to adapt to the less blood flow required in the later period of implanting the ventricular assist device 1; on the contrary, when it is detected that the blood pressure is too low, the controller 14 can increase the current or voltage of the driving motor 11 to increase the rotating speed of the impeller 190, so as to increase the blood flow to adapt to the greater blood flow required in the initial period of implanting the ventricular assist device 1.

[0079] The driving motor 11 comprises a driving shell 112 connected with the pump shell 100, and specifically, the driving shell 112 is connected with the second shell 144. The driving shell 112 is provided with a driving cavity 1121 spaced from the receiving cavity 110, and the driving cavity 1121 is used for mounting a motor stator, a controller 14 and other structures. The second shell 144 can seal the driving cavity 1121, so as to reduce the influence of external factors such as water vapor and dust on the motor stator as much as possible, and prolong the service life of the motor stator. The controller 14 is arranged in the driving cavity 1121, which can reduce the influence of external factors on the controller 14 and prolong the service life of the controller 14. The controller 14 is arranged in the driving cavity 1121, which also improves the integration of the ventricular assist device 1, avoids the increase of the diameter of the transcutaneous cable caused by the controller 14 arranged outside the body and connected with the controller 14, and further avoids the excessive opening of the skin tissue of the patient and reduces the pain of the patient.

[0080] Please continue to refer to Figures 3 to 5 The sensing assembly 12 can measure the blood pressure in the liquid inlet channel 132, so as to obtain the blood flow according to different blood pressures, thereby facilitating to meet the demand of the patient for the blood flow at different periods.

[0081] The sensor 124 is a pressure sensor. The sensor 124 is arranged between the inner tube 134 and the outer tube 136, that is, the sensor 124 is arranged in the accommodating cavity 180, so that the sensor 124 is separated from the blood in the liquid inlet channel 132 and the external environment, and the influence of external factors on the service life of the sensor 124 is reduced as much as possible, and the service life of the sensor 124 is prolonged.

[0082] The sensing assembly 12 further comprises a cable 126 connected between the sensor 124 and the controller 14. The driving shell 112 is further provided with a first wire hole 1122 in communication with the driving cavity 1121, and the cable 126 is arranged in the first wire hole 1122. One end of the cable 126 is connected with the sensor 124, and the other end of the cable 126 is connected with the controller 14. In this way, the sensor 124 between the outer tube 136 and the inner tube 134 is electrically connected with the controller 14 in the driving cavity 1121 through the cable 126, so that the controller 14 can receive the blood pressure in the liquid inlet channel 132 sensed by the sensor 124. It should be noted that, in order to avoid the blood entering the driving cavity 1121 through the first wire hole 1122 and causing damage to the driving motor 11, the first wire hole 1122 can be plugged by a material such as silica gel or glue, which can further fix the cable 126 while sealing the first wire hole 1122.

[0083] In the embodiment, the pump top surface 101 is provided with a wire accommodating groove 1421. Specifically, the surface of the first shell 142 facing the outer protruding ring 150 is provided with the wire accommodating groove 1421. One end of the wire accommodating groove 1421 is adjacent to the outer protruding ring 150, and the other end of the wire accommodating groove 1421 extends radially to be close to the pump side surface 102. At least part of the cable 126 is accommodated in the wire accommodating groove 1421, which can reduce the exposure of the cable 126 and make the overall appearance of the ventricular assist device 1 more concise. It should be noted that the wire accommodating groove 1421 can also accommodate silicone or glue, etc. The silicone or glue can fill the wire accommodating groove 1421 and shield and fix the cable 126, thereby reducing the shaking of the cable 126 and reducing the probability of the cable 126 being separated from the sensor 124 due to the pulling of external force.

[0084] Referring to Figure 5 and Figure 12 , the sensor 124 further includes a substrate 1242. The substrate 1242 is in the form of a flat plate. The sensing part 1241 is mounted on the substrate 1242 and is electrically connected to the substrate 1242. The substrate 1242 is attached to the mounting plane 1344, so that the substrate 1242 and the mounting plane 1344 of the mounting boss 1342 are in plane contact, thereby increasing the contact area between the substrate 1242 and the mounting boss 1342 and increasing the connection strength therebetween. In the embodiment, the substrate 1242 and the mounting boss 1342 can be connected by welding. In other embodiments, the substrate 1242 and the mounting boss 1342 can be connected by adhesion.

[0085] Referring to Figure 11 , the outer protruding ring 150 is provided with a second wire hole 151 for the cable 126 to pass through. The second wire hole 151 is adjacent to one end of the wire accommodating groove 1421. Specifically, the cable 126 can pass through the second wire hole 151 from the accommodating cavity 180, extend to the outside of the ventricular assist device 1, and be at least partially accommodated in the wire accommodating groove 1421, and then pass through the first wire hole 1122 until connected to the controller 14 in the driving cavity 1121. In the embodiment, the outer circumferential surface 155 of the outer protruding ring 150 is provided with an expansion groove 153. It should be noted that the expansion groove 153 can accommodate silicone or glue, etc. The silicone or glue can fill the expansion groove 153 and shield and fix the cable 126, thereby reducing the shaking of the cable 126 and further reducing the probability of the cable 126 being separated from the sensor 124 due to the pulling of external force. The provision of the expansion groove 153 can also increase the wire passing space, thereby facilitating the cable 126 to smoothly pass through the second wire hole 151. In order to avoid the blood entering the accommodating cavity 180 through the second wire hole 151 and causing blood retention, etc., the second wire hole 151 can be blocked by silicone or glue, etc. The sealing of the second wire hole 151 can further fix the cable 126.

[0086] In summary, the ventricular assist device 1 provided in the embodiment has the sensor 124 arranged at the inlet pipe 130 of the pump shell 100, the diaphragm 121 arranged in the liquid inlet passage 132 of the inlet pipe 130, and the sensing portion 1241 arranged at the side of the diaphragm 121 away from the liquid inlet passage 132, so that the sensing portion 1241 of the sensor 124 can sense the blood pressure received by the diaphragm 121 to obtain the blood pressure in the liquid inlet passage 132. The controller 14 controls the driving motor 11 to adjust the rotating speed of the impeller 190 according to the blood pressure sensed by the sensor 124, and the adjustment of the rotating speed of the impeller 190 affects the size of the blood flow, thereby facilitating the ventricular assist device 1 to provide appropriate blood flow to meet the needs of the patient for blood flow at different periods.

[0087] Second embodiment Please refer to Figures 15 to 17 The embodiment provides a ventricular assist device 2, which comprises a pump body 20, a driving motor 21, a sensing assembly 22 and a controller 24. The pump body 20 comprises a pump shell 200 and an impeller 290. The pump shell 200 is provided with a receiving cavity 210 and an inlet pipe 230. The inlet pipe 230 has a liquid inlet passage 232 in communication with the receiving cavity 210. The impeller 290 is rotatably arranged in the receiving cavity 210. The driving motor 21 is connected to the pump shell 200 and can drive the impeller 290 to rotate. The sensing assembly 22 comprises a diaphragm 221 and a sensor 224. The diaphragm 221 is arranged in the liquid inlet passage 232. The sensor 224 is arranged at the inlet pipe 230 and comprises a sensing portion 2241 arranged at the side of the diaphragm 221 away from the liquid inlet passage 232 to sense the blood pressure received by the diaphragm 221. The controller 24 is electrically connected to the driving motor 21 and the sensor 224 to control the driving motor 21 to adjust the rotating speed of the impeller 290 according to the blood pressure.

[0088] The inlet tube 230 comprises an inner tube 234 and an outer tube 236, wherein the inner tube 234 comprises a tube body 237 and a mounting piece 239 arranged on the tube body 237, and the inner tube 234 surrounds the liquid inlet channel 232. Different from the ventricular assist device 1 of the first embodiment, the length of the tube body 237 of the inlet tube 230 of the ventricular assist device 2 of the present embodiment is longer. The side wall of the tube body 237 is provided with an assembly opening 2371, which is in communication with the liquid inlet channel 232. The mounting piece 239 is in the form of a cover plate and covers the assembly opening 2371 to surround the liquid inlet channel 232 with the tube body 237. The mounting piece 239 has an inner plate surface 2391 facing the liquid inlet channel 232, which is smoothly connected with the inner wall surface 2373 of the tube body 237, i.e., the side wall of the mounting piece 239 does not protrude from or recess into the inner wall surface 2373 of the tube body 237, so that recesses or protrusions are avoided at the joint between the mounting piece 239 and the tube body 237, thereby avoiding the blood in the liquid inlet channel 232 from entering the recesses or being blocked by the protrusions, and further avoiding the aggregation or stagnation of the blood caused by thrombosis. In the actual production process, the joint between the mounting piece 239 and the tube body 237 can be polished to smoothly connect the mounting piece 239 with the inner wall surface 2373 of the tube body 237.

[0089] In the present embodiment, the mounting piece 239 has an outer plate surface 2392 facing away from the liquid inlet channel 232, which is smoothly connected with the outer wall surface 2374 of the tube body 237, so that the joint between the mounting piece 239 and the tube body 237 does not have protrusions, which is beneficial to the fixed connection of the mounting piece 239 and the tube body 237. As an example, before being fixed (e.g., welded), the mounting piece 239 is first connected with the tube body 237, and when the outer plate surface 2392 of the mounting piece 239 is smoothly connected with the outer wall surface 2374 of the tube body 237, it indicates that the mounting piece 239 and the tube body 237 have been connected in place, and at this time, the mounting piece 239 and the tube body 237 can be welded.

[0090] Please refer to Figures 16 to 19The outer tube 236 is sleeved and connected to the inner tube 234, and specifically, one end of the outer tube 236 away from the accommodation cavity 210 can be fixedly connected to one end of the inner tube 234 away from the accommodation cavity 210, and the fixed connection can be welding or bonding, etc. The accommodation cavity 280 is further formed between the outer tube 236 and the inner tube 234, and the accommodation cavity 280 can be used to accommodate part of the sensing assembly 22. The pump housing 200 further comprises an outer convex ring 250 and an inner convex ring 260, both of which are substantially ring wall-shaped, the outer convex ring 250 surrounds the inner convex ring 260, the outer convex ring 250 is connected to the outer tube 236, and the inner convex ring 260 is connected to the inner tube 234, and specifically, the inner convex ring 160 is connected to the tube body 237 of the inner tube 230. The outer convex ring 250 and the outer tube 236, and the inner convex ring 260 and the tube body 237 can be connected by welding or bonding.

[0091] In the embodiment, the assembly opening 2371 also communicates with the accommodation cavity 280, that is, the assembly opening 2371 is a through hole provided in the side wall of the mounting piece 239. In other embodiments, the assembly opening 2371 does not communicate with the accommodation cavity 280, that is, the assembly opening 2371 is a blind hole provided in the side wall of the mounting piece 239, which meets the mounting purpose of the mounting piece 239, and can be set according to actual conditions.

[0092] The inner plate surface 2391 of the mounting piece 239 facing the liquid inlet channel 232 is provided with a mounting groove 2396, and the diaphragm 221 is mounted in the mounting groove 2396, and the diaphragm 221 smoothly transitions with the inner wall surface 2373 of the tube body 237, and the diaphragm 221 also smoothly transitions with the side wall of the mounting piece 239, that is, the diaphragm 221, the inner wall surface 2373 of the tube body 237 and the side wall of the mounting piece 239 smoothly transition with each other, avoiding thrombosis caused by blood aggregation or stagnation. In the embodiment, the mounting groove 2396 is provided on part of the side wall of the mounting piece 239. In other embodiments, the mounting groove 2396 can also be provided on the entire side wall of the mounting piece 239.

[0093] The mounting piece 239 is further provided with a pressure measuring hole 2398, and the pressure measuring hole 2398 penetrates the groove bottom surface of the mounting groove 2396. The diaphragm 221 shields the pressure measuring hole 2398, avoiding thrombosis caused by blood accumulation in the pressure measuring hole 2398 due to blood in the liquid inlet channel 232 entering the pressure measuring hole 2398.

[0094] In summary, the ventricular assist device 2 provided in the embodiment has the sensor 224 arranged at the inlet pipe 230 of the pump shell 200, the diaphragm 221 arranged in the liquid inlet channel 232 of the inlet pipe 230, and the sensing portion 2241 arranged at the side of the diaphragm 221 away from the liquid inlet channel 232, so that the sensing portion 2241 of the sensor 224 can sense the blood pressure received by the diaphragm 221 to obtain the blood pressure in the liquid inlet channel 232. The controller 24 controls the driving motor 21 to adjust the rotating speed of the impeller 290 according to the blood pressure sensed by the sensor 224, and the adjustment of the rotating speed of the impeller 290 affects the size of the blood flow, thereby facilitating the ventricular assist device 2 to provide appropriate blood flow to meet the needs of the patient for blood flow at different stages.

[0095] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not contradict each other, they should be considered within the scope of the present disclosure.

[0096] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent application scope. It should be noted that for those skilled in the art, several modifications 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 patent protection scope of the present application should be subject to the appended claims.

Claims

1. A ventricular assist device, characterized by, The application relates to a sensor assembly for a ventricular assist device. The sensor assembly comprises a sensor, which is arranged between an inner tube and an outer tube of an inlet pipe of the ventricular assist device, and the sensor comprises a sensing portion arranged corresponding to a pressure measuring hole of the inner tube to enable the sensor to sense the blood pressure in a liquid inlet channel of the inlet pipe. The sensor assembly further comprises a diaphragm arranged on one side of the sensing portion adjacent to the liquid inlet channel, and an inner wall of the inner tube is provided with a mounting groove, and the pressure measuring hole penetrates through a groove bottom of the mounting groove, and the diaphragm is mounted in the mounting groove and covers the pressure measuring hole. A soft material is arranged between the diaphragm and the sensing portion, and the soft material is filled between the diaphragm and the sensing portion and is in contact with both the diaphragm and the sensing portion, so that the blood pressure is conducted to the sensing portion of the sensor through the soft material.

2. The ventricular assist device of claim 1, wherein, At least part of the sensing portion extends into the pressure measuring hole, and the sensing portion is spaced from the diaphragm.

3. The ventricular assist device of claim 2, wherein, The liquid inlet channel comprises a liquid inlet section and a liquid flow section connected in communication, the liquid inlet section is away from the receiving cavity relative to the liquid flow section, and the inner diameter of the liquid inlet section gradually decreases along the direction from the liquid inlet section to the liquid flow section, the inner diameter of the liquid flow section is constant, and the pressure measuring hole is arranged in the liquid flow section.

4. The ventricular assist device of claim 2, wherein, The liquid inlet channel comprises a liquid inlet section and a liquid flow section connected in communication, the liquid inlet section is away from the receiving cavity relative to the liquid flow section, the liquid inlet channel further comprises a liquid outlet section arranged on one side of the liquid flow section away from the liquid inlet section, the liquid outlet section is in communication with the receiving cavity, and the pressure measuring hole is arranged on one side of the liquid flow section away from the liquid outlet section.

5. The ventricular assist device of claim 2, wherein, The ventricular assist device further comprises an impeller, a driving motor and a controller, the impeller is rotatably arranged in the receiving cavity, the driving motor is connected to the pump shell, and the driving motor can drive the impeller to rotate.

6. The ventricular assist device of claim 1, wherein, The controller is electrically connected to the driving motor and the sensor to control the driving motor to adjust the rotating speed of the impeller according to the blood pressure, the sensor assembly further comprises a cable connected between the sensor and the controller, the driving motor comprises a driving shell connected to the pump shell, the driving shell is provided with a driving cavity spaced from the receiving cavity and a first wire hole in communication with the driving cavity, the controller is arranged in the driving cavity, and the cable is arranged in the first wire hole.

7. The ventricular assist device of claim 1, wherein, The pump shell has a pump top surface facing the inlet pipe and a pump side surface connected to the pump top surface, the pump shell is further provided with a liquid inlet port in communication with the receiving cavity and the liquid inlet channel, the pump top surface is provided with an outer convex ring surrounding the periphery of the liquid inlet port, the outer convex ring is connected to the outer tube, the outer convex ring is provided with a second wire hole for the cable to pass through, and the second wire hole is arranged in the outer convex ring. ​ 8. The ventricular assist device of claim 7, wherein, ​ The pump top surface is provided with a wire accommodating groove, one end of the wire accommodating groove is adjacent to the second wire hole, the other end of the wire accommodating groove extends radially to be close to the pump side surface, and at least part of the cable is accommodated in the wire accommodating groove; and / or, the outer circumferential surface of the outer convex ring is provided with an expansion groove surrounding the outer periphery of the second wire hole.

9. The ventricular assist device of claim 2, wherein, The ventricular assist device further comprises at least one of the following features: The inner tube comprises a tube body and a mounting member arranged in the axial direction, the tube body and the mounting member cooperatively form the liquid inlet channel, the inner circumferential surface of the mounting member is recessed from the inner wall of the tube body to form the mounting groove in communication with the liquid inlet channel, and the diaphragm smoothly transitions with the inner wall surface of the tube body. The diaphragm is made of titanium or silicon dioxide.

10. The ventricular assist device of claim 1, wherein, The pump shell is provided with a liquid inlet port in communication with the accommodation cavity and the liquid inlet channel; the pump shell is provided with an inner convex ring surrounding the periphery of the liquid inlet port; the inner tube comprises a tube body and a mounting member arranged in the axial direction, the mounting member is connected between the tube body and the inner convex ring, one side of the tube body away from the tube port of the inlet tube is provided with a first annular step, the first annular step faces the liquid inlet channel, one side of the mounting member close to the tube port is provided with a second annular step, the second annular step faces away from the liquid inlet channel, and the first annular step and the second annular step are adapted to each other.

11. The ventricular assist device of claim 1, wherein, The pump shell is provided with a liquid inlet port in communication with the accommodation cavity and the liquid inlet channel; the pump shell is provided with an inner convex ring surrounding the periphery of the liquid inlet port; the inner tube comprises a tube body and a mounting member arranged in the axial direction, the mounting member is connected between the tube body and the inner convex ring, the inner circumferential surface of the mounting member is farther away from the central axis of the inlet tube than the inner wall surface of the tube body and the inner wall surface of the inner convex ring, so that the inner circumferential surface of the mounting member is recessed radially outwardly from the inner wall surface of the tube body or the inner wall surface of the inner convex ring to form a mounting groove; the sensing assembly further comprises a diaphragm mounted in the mounting groove, and the diaphragm smoothly transitions with the inner wall surface of the tube body.

12. The ventricular assist device of any one of claims 1-11, wherein, The outer wall surface of the inner tube is convexly provided with a mounting boss, the pressure measuring hole penetrates through the mounting boss, and one side of the mounting boss away from the liquid inlet channel is provided with a mounting plane. The sensor further comprises a substrate, the sensing part is mounted on the substrate, and the substrate is attached to the mounting plane; And / or, the outer wall surface of the inner tube comprises a cut plane and a circumferential surface connected with the cut plane and extending in the circumferential direction; the mounting boss is arranged on the circumferential surface, and the mounting plane of the mounting boss and the cut plane are coplanar.

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