External rotor ventricular assist pump device

Abstract

The present invention provides an external rotor ventricular assist circulation pump device, which relates to the technical field of cardiac blood pumps. It proposes a structure in which the motor of the cardiac blood pump is arranged in the ventricle and below the aortic valve or the pulmonary valve. On this basis, the motor is embedded in the blood pump housing, and the blood in the blood pump housing is rotated by the external rotor of the motor. This ensures that the present invention will not cause damage to the ventricle while avoiding the obstruction of the blood circulation process caused by the size of the motor itself. In addition, the motor is embedded in the blood pump housing through fixed brackets at both ends, which not only satisfies the blood rotation effect, but also further reduces the volume of the blood pump body, making it easier to implant in the human body.

Description

Technical Field

[0001] The present invention relates to the technical field of cardiac blood pumps, and in particular to an outer rotor type ventricular assist circulation pump device. Background Art

[0002] A ventricular assist circulation pump device, also known as a cardiac blood pump, is an important auxiliary circulation pump device used to improve cardiac blood circulation due to insufficient power in heart failure. Currently, a cardiac blood pump adopts a series configuration, which refers to constructing a channel in the cardiac artery tube. This channel is the same size as the cardiac artery tube, and the channel is configured in series with the cardiac artery tube. For example, patent CN117379681A belongs to a cardiac blood pump with a series configuration. However, the cardiac blood pump with a series configuration sets the motor outside the ventricle, resulting in the cardiac blood pump needing to pass through the ventricle through a support rod, increasing the difficulty of the operation; for example, patent CN117427268A also belongs to a cardiac blood pump with a series configuration. The cardiac blood pump with a series configuration chooses to set the motor inside the ventricle, but the motor is located above the aortic valve or the pulmonary valve. During cardiac blood circulation, since the aortic valve or the pulmonary valve is not opened to a large extent, the size of the motor itself will affect cardiac blood circulation. In summary, the technical problems to be solved by the present invention are how to solve the problem of high surgical difficulty when implanting a heart blood pump with a series configuration and how to simultaneously avoid the motor size affecting the circulation of heart blood. Summary of the Invention

[0003] The purpose of the present invention is to provide an external rotor ventricular assist circulation pump device, which proposes a structure in which the motor of the heart blood pump is set inside the ventricle and below the aortic valve or the pulmonary valve, and on this basis, the motor is embedded in the blood pump housing, and the blood in the blood pump housing is rotated by the external rotor of the motor.

[0004] In order to solve the above technical problems, the present invention adopts the following solutions:

[0005] An external rotor type ventricular assist circulation pump device includes: a blood pump body, which is connected in series with the cardiac artery tube in the cardiac artery tube, and the blood pump body includes a blood pump shell, which is a hollow sleeve, and the lower end of the hollow sleeve faces the ventricle and is located in the ventricle. An inner stator is coaxially arranged inside the hollow sleeve, and an outer rotor is rotatably installed outside the inner stator. An inner stator is coaxially arranged inside the hollow sleeve, and an outer rotor is rotatably installed outside the inner stator. The upper and lower ends of the hollow sleeve are supported and connected to the two ends of the inner stator by a fixed bracket, so that the inner stator and the outer rotor are confined in the hollow sleeve, and the outer wall of the outer rotor is provided with an impeller located in the hollow sleeve.

[0006] A further preferred technical solution is: a fixed bracket is respectively provided at the upper and lower ends of the blood pump housing, and the fixed bracket includes a support rod, one end of the support rod is fixed to the upper or lower end of the hollow sleeve, and the other end of the support rod intersects with the central axis of the hollow sleeve and is fixedly connected to one end of the inner stator.

[0007] A further preferred technical solution is: the outer rotor includes a permanent magnet, the inner stator includes a winding coil, the winding coil is connected to a lead wire, and the lead wire is led through the inner stator and the inside of the support rod to the outer wall of the blood pump housing.

[0008] A further preferred technical solution is: a temperature sensor is arranged around the inner stator, and the wires of the temperature sensor and the lead wires are bundled.

[0009] A further preferred technical solution is: a groove extending toward the lead wire is provided inside the blood pump housing, a pressure sensor is provided inside the groove at both ends of the groove, and the wires of the pressure sensor are bundled with the lead wire.

[0010] A further preferred technical solution is: the upper end of the hollow sleeve is provided with a radially outward flange portion facing the lower surface of the aortic valve or the pulmonary valve, so that the flange portion is connected to the aortic root or the pulmonary root, and the front end of the inner stator faces the lower surface of the aortic valve or the pulmonary valve. The lead-out wire passes through the blood pump housing through the support rod connected to the front end of the inner stator, extends on the outer wall of the blood pump housing to the lower surface of the flange portion, and then extends radially outward along the flange portion.

[0011] A further preferred technical solution is: the flange portion is provided with a plurality of assembly holes, and the axial direction of the assembly holes is the same as the axial direction of the hollow sleeve.

[0012] A further preferred technical solution is: the upper surface and / or lower surface of the flange part is pre-installed or temporarily assembled with a suture body through the assembly hole, the suture body located on the upper surface is an upper suture body used for suturing with the lower surface of the aortic root or the pulmonary artery root or for suturing with the circumferential annular membrane of the blood pump body, the circumferential annular membrane of the blood pump body is also used for suturing with the aortic root or the pulmonary artery root, the suture body located on the lower surface is a lower suture body used for suturing with the aortic root or the pulmonary artery root, and the lead wire passes through the suture body located on the lower surface and passes through the aortic root or the pulmonary artery root.

[0013] A further preferred technical solution is that the suture body is an annular medical polyester braid or an annular polytetrafluoroethylene braid or an annular artificial blood vessel, and both ends of the inner stator are respectively provided with bearings connected to the outer rotor.

[0014] A further preferred technical solution is: the fixed bracket includes at least one support rod, the support rod is an arc-shaped structure, the outer rotor and the hollow sleeve are the same length, the inner stator is longer than the outer rotor and the hollow sleeve, and the length is the scale in the up and down direction.

[0015] Beneficial effects of the present invention:

[0016] The present invention provides an external rotor ventricular assist circulation pump device, which adopts a structure in which the motor of the heart blood pump is arranged in the ventricle and below the aortic valve or the pulmonary valve. Compared with the existing technology, the motor is first shortened to the ventricle so that the motor does not need to pass through the ventricle during the heart blood pump operation, which will not cause damage to the ventricle and reduce the difficulty of the operation; then the motor is arranged below the aortic valve or the pulmonary valve to avoid the size of the motor itself from blocking the blood circulation process.

[0017] Based on this structure, an external rotor type ventricular assist circulation pump device is proposed, in which the motor is configured as an inner stator and an outer rotor, so that the rotor is rotatably installed outside the stator, and the impeller can be directly set on the outer wall of the rotor, so that the present invention can realize the rotation of blood through the impeller on the outer rotor. In the present invention, the motor is embedded in the blood pump housing through the fixed brackets at both ends, which can not only meet the rotation effect of the blood, but also further reduce the volume of the blood pump body, making it easier to implant in the human body.

[0018] In addition, temperature sensors and pressure sensors are provided at corresponding positions of the external rotor ventricular assist circulation pump device. The temperature and pressure values ​​of the blood pump body can be monitored in real time through the temperature sensors and pressure sensors. When the temperature and pressure values ​​are abnormal, an alarm can be sounded. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of an external rotor ventricular assist circulation pump device connected in series with a cardiac artery tube in Example 1 of the present invention;

[0020] Figure 2 Schematic side view of the upper end of the blood pump body in Example 1 of the present invention;

[0021] Figure 3 Schematic side view of the lower end of the blood pump body in Example 1 of the present invention;

[0022] Figure 4 Schematic cross-sectional view of the blood pump body in Example 1 of the present invention;

[0023] Figure 5 This is a schematic diagram of the arrangement of the temperature sensor and the pressure sensor in Example 1 of the present invention;

[0024] Explanation of the accompanying reference numerals: 1-heart artery tube, 2-ventricle, 3-blood pump body, 4-aortic valve or pulmonary valve, 5-aortic root or pulmonary artery root, 6-lead wire, 7-blood pump housing, 8-flanged portion, 81-assembly hole, 9-fixing bracket, 10-bearing, 11-outer rotor, 12-inner stator, 13-impeller, 14-winding coil, 15-permanent magnet, 16-pressure sensor, 17-temperature sensor. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Unless otherwise specifically stated, the relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0027] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0028] Additionally, descriptions of well-known structures, functions, and configurations may be omitted for clarity and conciseness. Those skilled in the art will recognize that various changes and modifications can be made to the examples described herein without departing from the spirit and scope of the present disclosure.

[0029] Technologies, methods and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods and equipment should be considered part of the authorization specification.

[0030] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0031] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments:

[0032] Example 1

[0033] like Figure 1-Figure 5As shown, the external rotor type ventricular assist circulation pump device includes: a blood pump body 3, which is connected in series with the cardiac artery tube 1 in the cardiac artery tube 1, and the blood pump body 3 includes a blood pump shell 7, which is a hollow sleeve. The lower end of the hollow sleeve faces the ventricle 2 and is located in the ventricle 2. The interior of the hollow sleeve is coaxially provided with an inner stator 12, and the outer rotor 11 is rotatably installed outside the inner stator 12. The upper and lower ends of the hollow sleeve are supported and connected to the two ends of the inner stator 12 by a fixed bracket 9, so that the inner stator 12 and the outer rotor 11 are confined in the hollow sleeve, and the outer wall of the outer rotor 11 is provided with an impeller 13 located in the hollow sleeve.

[0034] like Figure 1 As shown, the blood pump body 3 adopts a series configuration and is located in the cardiac artery tube 1. The blood pump body 3 includes a blood pump housing 7. The blood pump housing 7 is a hollow sleeve, which is connected in series with the cardiac artery tube 1. A flange portion 8 is provided at the upper end of the hollow sleeve. The flange portion 8 is located on the lower surface of the aortic valve or the pulmonary valve 4. The purpose is to sew the blood pump body 3 and the aortic valve or the pulmonary valve 4 together through the flange portion 8 so that blood can only flow out of the hollow sleeve. An inner stator 12 and an outer rotor 11 are arranged in the hollow sleeve. In the present invention, a structure in which the motor is arranged in the hollow sleeve is adopted. It can be seen that the present invention mainly adopts the method of arranging the motor in the ventricle 2 and below the aortic valve or pulmonary valve 4. When the driving motor provides kinetic energy, a blood flow channel is formed between the motor and the blood pump housing 7, and the aortic valve or pulmonary valve 4 above the flange 8 opens, and blood flows from the ventricle 2 into the artery. With respect to the existing technology, the motor is first shortened to the ventricle 2 so that the motor does not need to pass through the ventricle 2 during the heart blood pump operation, and will not cause damage to the ventricle 2 while reducing the difficulty of the operation; then the motor is arranged below the aortic valve or pulmonary valve 4 to avoid the size of the motor itself from blocking the blood circulation process.

[0035] A further preferred technical solution is: a fixed bracket 9 is respectively provided at the upper and lower ends of the blood pump housing 7, and the fixed bracket 9 includes a support rod, one end of the support rod is fixed to the upper or lower end of the hollow sleeve, and the other end of the support rod intersects with the central axis of the hollow sleeve and is fixedly connected to one end of the inner stator 12.

[0036] A further preferred technical solution is: the fixed bracket 9 includes at least one support rod, the support rod is an arc-shaped structure, the outer rotor 11 is the same length as the hollow sleeve, the inner stator 12 is longer than the outer rotor 11 and the hollow sleeve, and the length is the scale in the up and down direction.

[0037] like Figure 2-Figure 3As shown, in the present invention, in order to reduce the size of the blood pump body 3 while realizing the rotation of the blood in the channel, an outer rotor type ventricular assist circulation device is designed. The outer rotor type refers to the configuration of the motor using an inner stator 12 and an outer rotor 11. The inner stator 12 refers to the motor using the stator as the central axis, and the outer rotor 11 refers to the motor setting the rotor outside the stator. One of the stator and the rotor includes a permanent magnet 15 and one of the rotor and the stator includes a winding coil 14. It can be set that the outer rotor 11 includes a permanent magnet 15 and the inner stator 12 includes a winding coil 14, so that the rotor located on the outside rotates. The impeller 13 can be directly set on the outer wall of the rotor. When the rotor rotates, the impeller 13 is driven to rotate.

[0038] Specifically, the inner stator 12 and the outer rotor 11 are arranged in the blood pump housing 7 by using the fixing brackets 9 at the front and rear ends. The fixing brackets 9 are composed of a plurality of tubular support rods. Figure 2 and Figure 3 As can be seen, the fixed bracket 9 is specifically shaped like a herringbone and is composed of three support rods. One end of the three support rods is welded to the inner wall of the blood pump housing 7, and the other ends of the three support rods are welded together to form a small disc. The side of the small disc facing the inside of the blood pump housing 7 is connected to the inner stator 12, providing strong stability and achieving a fixed connection between the motor and the inner wall of the blood pump housing 7. When the drive motor provides kinetic energy, because the inner stator 12 is fixedly connected to the blood pump housing 7 via the fixed brackets 9 on both sides, a blood flow channel is formed between the outer rotor 11 and the blood pump housing 7. The outer rotor 11 drives the impeller 13 located in the blood flow channel to rotate, and blood rotates through the blood flow channel. At this time, the aortic valve or pulmonary valve 4 above the flange portion 8 opens, and blood flows from the ventricle 2 into the artery.

[0039] A further preferred technical solution is: the flange portion 8 is provided with a plurality of assembly holes 81 , and the axial direction of the assembly holes 81 is the same as the axial direction of the central axis of the hollow sleeve.

[0040] A further preferred technical solution is: the upper surface and / or lower surface of the flange portion 8 is pre-installed or temporarily assembled with a suture body through the assembly hole 81, the suture body located on the upper surface is an upper suture body used for suturing with the lower surface of the aortic root or the pulmonary artery root 5 or for suturing with the circumferential annulus of the blood pump body 3, the circumferential annulus of the blood pump body 3 is also used for suturing with the aortic root or the pulmonary artery root 5, the suture body located on the lower surface is a lower suture body used for suturing with the aortic root or the pulmonary artery root 5, and the lead wire 6 passes through the suture body located on the lower surface and passes through the aortic root or the pulmonary artery root 5.

[0041] A further preferred technical solution is that the suture body is an annular medical polyester braid or an annular polytetrafluoroethylene braid or an annular artificial blood vessel, and bearings 10 connected to the outer rotor 11 are respectively provided at both ends of the inner stator 12 .

[0042] like Figure 1-Figure 3 As shown, the blood pump body 3 utilizes a flanging process, making the outer diameter of the blood pump housing 7 approximately equal to that of the cardiac artery tube 1. A flanging process is used to form a flange portion 8 at the upper end of the blood pump housing 7. This flange portion 8 should not be too wide; it can be sized to fit the upper and lower axes of the flange portion 8. The flange portion 8 can be horizontally straight or curved. Sutures are provided on at least one of its upper and lower surfaces, serving as a medium for suture connection to the aortic root or pulmonary root 5 and / or the cardiac artery tube 1 using sutures. Assembly holes 81 are also provided for the passage of sutures. As can be seen, the present invention utilizes the aortic root or pulmonary root 5 to suspend the blood pump body 3. The aortic root 5 is the root portion of the heart valve, generally extending horizontally perpendicular to the cardiac artery tube 1 and being relatively thick. The aortic root 5 has greater toughness and can support heavier equipment, which improves the convenience of suturing, subsequent safety, and the area available for suturing. Compared with the traditional method of directly suturing the inner wall of the cardiac artery tube 1, the cardiac artery tube 1 is less damaged. Among them, the sutures in the present invention are all vertical sutures and will not appear on the inner wall of the blood pump housing 7, avoiding the risk of thrombosis.

[0043] Specifically, the upper and / or lower surfaces of the cuff portion 8 are pre-installed or temporarily assembled with sutures. The suture located on the upper surface is an upper suture used to suture the lower surface of the aortic root or pulmonary artery root 5 or the circumferential annulus of the blood pump body 3. The circumferential annulus of the blood pump body 3 is also used to suture the aortic root or pulmonary artery root 5. The suture located on the lower surface is a lower suture used to suture the aortic root or pulmonary artery root 5. The sutures include a lower suture and an upper suture. The lower suture, cuff portion 8, and upper suture are stacked up and down to form a stacked assembly. The aortic root or pulmonary artery root 5 is also a horizontal human tissue structure. The aortic root or pulmonary artery root 5, the lower suture, cuff portion 8, and upper suture are stacked up and down to form a stacked assembly. This assembly is in a hanging mode, with the cuff portion 8 being embedded in the stacked assembly. The upper suture body and / or the lower suture body are pre-installed or temporarily assembled on the upper and / or lower sides of the flange portion 8 after the suture passes through the assembly hole 81 .

[0044] Specifically, assembly holes 81 include assembly holes 81 of a first diameter and assembly holes 81 of a second diameter. The assembly holes 81 of the first diameter and the assembly holes 81 of the second diameter are arranged alternately. The assembly holes 81 of the first diameter are used to assemble the lower end of the support rod or sutures, and the assembly holes 81 of the second diameter are used to assemble the lower end of the support rod or sutures. The diameter of the assembly holes 81 of the first diameter is greater than or equal to the diameter of the assembly holes 81 of the second diameter. In the present invention, assembly holes 81 are divided into two categories: large-diameter holes and small-diameter holes. The large-diameter holes are used to assemble the lower end of the support rod, and the small-diameter holes are used to assemble sutures.

[0045] Based on the above-mentioned principle of suturing the aortic root or pulmonary artery root 5 and the cuff 8, in the present invention, as Figure 1 As shown, a design is proposed to lead out the lead wire 6 of the motor from the aortic root or the pulmonary artery root 5. Since the aortic root or the pulmonary artery root 5 is the root part of the heart valve, this part generally grows horizontally perpendicular to the cardiac artery tube 1 and is relatively thick. Therefore, compared with the design of leading out the lead wire 6 of the motor from the aortic root or the pulmonary artery root 5 in the prior art, the loss to the cardiac artery tube 1 is smaller.

[0046] A further preferred technical solution is: the outer rotor 11 includes a permanent magnet 15, the inner stator 12 includes a winding coil 14, the winding coil 14 is connected to a lead wire 6, and the lead wire 6 is led to the outer wall of the blood pump housing 7 through the inner stator 12 and the inside of the support rod.

[0047] The lead wire 6 is a wire used to drive the motor and supply energy. The lead wire needs to be led out of the blood pump body 3 to drive the motor to provide kinetic energy. The lead wire 6 is generally connected to the stator of the motor. Figure 4 As shown, when the stator is connected to the fixed bracket 9 through the bearings 10 at both ends, the upper and lower ends of the hollow sleeve are supported and connected to the two ends of the inner stator 12 through the fixed bracket 9, so that the inner stator 12 and the outer rotor 11 are confined in the hollow sleeve, and the lead wire 6 can be led out from the bearing 10 by routing. At this time, based on the fixed bracket 9, a design of leading the lead wire 6 through the inside of the support rod is proposed, and the support rod is set to a tubular hollow rod, so that the lead wire 6 can be embedded in the hollow rod, avoiding routing of the lead wire 6 in the blood flow channel, avoiding blocking the outflow of blood in the blood flow channel, and reducing the impact on blood outflow.

[0048] And, in Figure 4As can be seen, the blood pump housing 7 is provided with a stator located in the center and a rotor located on the outside, namely, an inner stator 12 and an outer rotor 11. A winding coil 14 can be provided on the inner stator 12, and a permanent magnet can be provided on the outer rotor 11. Through the interaction between the winding coil 14 and the permanent magnet, the outer rotor 11 is driven to rotate about the inner stator 12 as the central axis, thereby driving the impeller 13 on the outer wall of the outer rotor 11 to rotate, causing the blood in the blood flow channel to rotate, driving the blood upward to form pressure. When the aortic valve or the pulmonary valve 4 opens, blood is ejected from the inside of the ventricle 2 into the cardiac artery 1.

[0049] A further preferred technical solution is: the upper end of the hollow sleeve is provided with a radially outward flange portion 8 facing the lower surface of the aortic valve or the pulmonary valve 4, so that the flange portion 8 is connected to the aortic root or the pulmonary root 5, and the front end of the inner stator 12 faces the lower surface of the aortic valve or the pulmonary valve 4, and the lead wire 6 passes through the blood pump housing 7 through the support rod connected to the front end of the inner stator 12, extends on the outer wall of the blood pump housing 7 to the lower surface of the flange portion 8, and then extends radially outward along the flange portion 8.

[0050] Since the external rotor type ventricular assist circulation pump device adopts a flange portion 8 to realize the structure of the blood pump body 3 being connected in series with the cardiac artery tube 1 in the cardiac artery tube 1, the flange portion 8 adopts the principle of suturing with the aortic root or the pulmonary artery root 5. This principle is mainly based on the upper surface or / and lower surface of the flange portion 8 being pre-installed or temporarily assembled with a suture body through the assembly hole 81. The suture body on the upper surface is an upper suture body used for suturing with the lower surface of the aortic root or the pulmonary artery root 5 or for suturing with the circumferential annulus of the blood pump body 3. The circumferential annulus of the blood pump body 3 is also used for suturing with the aortic root or the pulmonary artery root 5. The suture body located on the lower surface is a lower suture body used for suturing with the aortic root or the pulmonary artery root 5. The lead wire 6 passes through the suture body located on the lower surface and passes through the aortic root or the pulmonary artery root 5.

[0051] A further preferred technical solution is: a temperature sensor 17 is arranged around the inner stator 12 , and the wires of the temperature sensor 17 are bundled with the lead wires 6 .

[0052] A further preferred technical solution is: a groove extending toward the lead wire 6 is provided inside the blood pump housing 7 , a pressure sensor 16 is provided inside the groove at both ends of the groove, and the wires of the pressure sensor 16 are bundled with the lead wire 6 .

[0053] like Figure 5As shown, the outer rotor ventricular assist circulation pump device is also provided with corresponding temperature sensors 17 and pressure sensors 16. Based on the routing direction of the lead wire 6, the temperature sensor 17 can be attached around the bearing 10 connected to the lead wire 6. This facilitates bundling the wires of the temperature sensor 17 with the lead wire 6 at the bearing 10, reducing the impact of the wires of the temperature sensor 17 on blood circulation within the blood flow channel. In addition, the temperature sensor 17 can monitor the temperature of the motor in real time. When the temperature exceeds the limit, an alarm can be sounded, preventing the device from operating at high temperatures for a long time and effectively extending the service life of the device. At the same time, a groove is provided inside the blood pump housing 7, and pressure sensors 16 are embedded in the groove at both ends. One pressure sensor 16 is located near the aortic valve or pulmonary valve 4, and the other pressure sensor 16 is located near the ventricle 2. That is, the pressure sensors 16 at both ends are installed at the blood flow channel inlet and outlet, respectively, and the speed of the outer rotor 11 can be adjusted according to pressure changes. Furthermore, the extension direction of the groove where the pressure sensor 16 is located is toward the lead wire 6, which facilitates bundling the wires of the pressure sensor 16 with the lead wire 6 along the inside of the groove, thereby reducing the influence of the wires of the pressure sensor 16 on blood rotation in the blood flow channel.

[0054] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Based on the technical essence of the present invention and within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement of the above embodiment shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. An external rotor ventricular assist circulation pump device, characterized in that: include: A blood pump body (3), wherein the blood pump body (3) is connected in series with the cardiac artery tube (1) in the cardiac artery tube (1), and the blood pump body (3) includes a blood pump housing (7), the blood pump housing (7) being a hollow sleeve, the lower end of the hollow sleeve facing the ventricle (2) and located in the ventricle (2), the interior of the hollow sleeve being coaxially provided with an inner stator (12), the outer rotor (11) being rotatably mounted on the outer side of the inner stator (12), the inner stator (12) being coaxially provided with an inner stator (12) in the interior of the hollow sleeve, the outer rotor (11) being rotatably mounted on the outer side of the inner stator (12), the upper and lower ends of the hollow sleeve being supported and connected to the two ends of the inner stator (12) by a fixing bracket (9), so that the inner stator (12) and the outer rotor (11) are confined in the hollow sleeve, and the outer wall of the outer rotor (11) is provided with an impeller (13) located in the hollow sleeve; A fixing bracket (9) is provided at the upper and lower ends of the blood pump housing (7), respectively. The fixing bracket (9) includes a support rod, one end of which is fixed to the upper or lower end of the hollow sleeve, and the other end of which intersects the central axis of the hollow sleeve and is fixedly connected to one end of the inner stator (12); The inner stator (12) is connected to a lead wire (6), and the upper end of the hollow sleeve is provided with a radially outward flange portion (8) facing the lower surface of the aortic valve or the pulmonary valve (4), so that the flange portion (8) is connected to the aortic root or the pulmonary artery root (5), and the front end of the inner stator (12) faces the lower surface of the aortic valve or the pulmonary valve (4). The lead wire (6) passes through the blood pump housing (7) through the support rod connected to the front end of the inner stator (12), extends on the outer wall of the blood pump housing (7) to the lower surface of the flange portion (8), and then extends radially outward along the flange portion (8) until it is led out from the aortic root or the pulmonary artery root (5).

2. The outer rotor ventricular assist pump device according to claim 1, characterized in that: The outer rotor (11) includes a permanent magnet (15), the inner stator (12) includes a winding coil (14), the winding coil (14) is connected to a lead wire (6), and the lead wire (6) is led through the inner stator (12) and the interior of the support rod to the outer wall of the blood pump housing (7).

3. The outer rotor ventricular assist circulatory pump device according to claim 2, characterized in that: A temperature sensor (17) is arranged around the inner stator (12), and the wires of the temperature sensor (17) are bundled with the lead wires (6).

4. The outer rotor ventricular assist circulatory pump device according to claim 2, characterized in that: A groove extending toward the lead wire (6) is provided inside the blood pump housing (7), and pressure sensors (16) are provided inside the groove at both ends of the groove. The lead wires of the pressure sensor (16) are bundled with the lead wire (6).

5. The outer rotor ventricular assist circulatory pump device according to claim 1, characterized in that: The flange portion (8) is provided with a plurality of assembly holes (81), and the axial direction of the assembly holes (81) is the same as the axial direction of the hollow sleeve.

6. The outer rotor ventricular assist circulatory pump device according to claim 5, characterized in that: The upper surface and / or lower surface of the flange portion (8) is pre-installed or temporarily assembled with a suture body through the assembly hole (81). The suture body located on the upper surface is an upper suture body used for suturing with the lower surface of the aortic root or the pulmonary artery root (5) or for suturing with the circumferential annulus of the blood pump body (3). The circumferential annulus of the blood pump body (3) is also used for suturing with the aortic root or the pulmonary artery root (5). The suture body located on the lower surface is a lower suture body used for suturing with the aortic root or the pulmonary artery root (5). The lead wire (6) passes through the suture body located on the lower surface and passes through the aortic root or the pulmonary artery root (5).

7. The outer rotor ventricular assist circulatory pump device according to claim 6, characterized in that: The suture body is an annular medical polyester braided body or an annular polytetrafluoroethylene braided body or an annular artificial blood vessel. Both ends of the inner stator (12) are respectively provided with bearings (10) connected to the outer rotor (11).

8. The outer rotor ventricular assist circulatory pump device according to claim 1, characterized in that: The fixed bracket (9) includes at least one support rod, which is an arc-shaped structure. The outer rotor (11) and the hollow sleeve have the same length, and the inner stator (12) is longer than the outer rotor (11) and the hollow sleeve, and the length is the scale in the up and down direction.

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