Stepped ventricular assist pump device

Abstract

The present invention provides a stepped ventricular assist circulation pump device, which relates to the technical field of cardiac blood pumps. It proposes a structure in which the cardiac blood pump is arranged in the ventricle and below the aortic valve or the pulmonary valve, and on this basis, a stepped motor and an axial flow channel are designed to form a blood flow channel between the motor and the axial flow channel, which can effectively avoid the size of the motor itself from blocking the blood circulation process above the aortic valve or the pulmonary valve, and effectively increase the amount of blood pumped out from the aortic valve or the pulmonary valve.

Description

Technical Field

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

[0002] When a patient's heart function declines, the heart cannot effectively pump blood, resulting in low blood pressure, which can cause the patient to experience symptoms such as dizziness, fatigue, and even fainting. To solve this problem, a ventricular assist circulatory pump device is commonly used. The ventricular assist circulatory pump device, also known as a heart blood pump, can improve heart blood circulation. Currently, there are two main types of heart blood pump designs: one is connected in parallel to the heart's channel, and the other is connected in series to the heart's channel. The channel refers to the blood flow channel constructed on the heart's artery, and the heart blood pump provides kinetic energy to pump blood out of the blood flow channel.

[0003] The cardiac blood pump involved in the present invention is a cardiac blood pump with a series configuration. At present, the series configuration refers to constructing a channel of the same size as the cardiac artery tube in the cardiac artery tube, and configuring the channel 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 the series configuration sets the motor outside the ventricle, resulting in the cardiac blood pump needing to pass through the ventricle through a support rod, which increases 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 the series configuration chooses to set the motor in the ventricle, but the motor is located above the aortic valve or the pulmonary valve. During the 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 the cardiac blood circulation, resulting in a small amount of blood pumped out in the blood flow channel, which cannot meet the patient's required blood pressure requirements.

[0004] 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 enable the heart blood pump to effectively pump blood. Summary of the Invention

[0005] The purpose of the present invention is to provide a stepped ventricular assist circulation pump device, which proposes a structure in which the heart blood pump is arranged in the ventricle and below the aortic valve or the pulmonary valve, and on this basis, a stepped motor and axial flow channel are designed to form a blood flow channel between the motor and the axial flow channel.

[0006] In order to solve the above technical problems, the present invention adopts the following solutions:

[0007] A stepped ventricular assist circulation pump device includes a ventricular assist circulation pump device connected in series with a cardiac artery tube, the ventricular assist circulation pump device including:

[0008] An axial flow channel, wherein a support frame is fixedly provided on the inner wall of the axial flow channel;

[0009] The motor includes a motor housing, wherein the outer wall of the upper half of the motor housing is fixedly connected to the inner wall of the axial flow channel via a support frame, and the outer wall of the lower half of the motor housing is exposed outside the axial flow channel and is located within the ventricle. The upper end of the axial flow channel is provided with a radially outward flange portion, the flange portion facing the lower surface of the aortic valve or the pulmonary valve and connected to the aortic root or the pulmonary artery root. The motor housing is located in the ventricle.

[0010] The motor housing is a hollow sleeve, the axial direction of the hollow sleeve is the same as the axial direction of the axial flow channel, an inner rotor and an outer stator are arranged in the hollow sleeve, one of the inner rotor and the outer stator includes a permanent magnet and one of the rotor and the stator includes a winding coil, the inner rotor is rotatably installed inside the outer stator, the inner rotor rotates in an axial direction, and drives the impeller arranged above the outer wall of the upper half to rotate.

[0011] A further preferred technical solution is: the support frame includes at least one supporting column, one end of the supporting column is fixedly connected to the outer wall of the upper half of the motor housing, and the outer wall of the lower half of the motor housing is exposed outside the axial flow channel; the other end of the supporting column is fixedly connected to the inner wall of the axial flow channel, so that the upper half of the motor is fixed in the axial flow channel, then in the vertical cross-section, the outer wall of the axial flow channel and the outer wall of the lower half of the motor housing form a decreasing step shape.

[0012] A further preferred technical solution is: the upper end of the motor is also connected to a rotating part with an impeller on the outer wall, the rotating part is located in the axial flow channel, one end of the inner stator is connected to the rotating part, driving the impeller to rotate; in the vertical cross-section, the outer wall of the rotating part and the outer wall of the lower half of the motor housing form an increasing step shape.

[0013] A further preferred technical solution is that at least one of the support columns is tubular in shape, and a lead wire for driving the motor to rotate is connected to the outer wall of the motor housing, and the lead wire passes through the tubular support column and penetrates the axial flow channel to the outer wall of the axial flow channel.

[0014] A further preferred technical solution is: a temperature sensor is attached around the inner wall of the motor housing, and the wires and lead wires of the temperature sensor are bundled on the outer wall of the motor housing.

[0015] A further preferred technical solution is: a groove extending toward the lead wire is provided on the inner wall of the axial flow channel, and a pressure sensor is provided inside the groove at both ends of the groove, and the wires of the pressure sensor and the lead wire are bundled on the inner wall of the axial flow channel.

[0016] A further preferred technical solution is that the lead wire extends along the outer wall of the axial flow channel to the lower surface of the flange portion, and then extends radially outward along the flange portion until it is led out from the aortic root or the pulmonary artery root.

[0017] 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 axial flow channel housing.

[0018] A further preferred technical solution is: the upper surface and / or lower surface of the flange part are 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 annulus of the ventricular assist circulation pump device, the circumferential annulus of the ventricular assist circulation pump device 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.

[0019] 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.

[0020] Beneficial effects of the present invention:

[0021] The present invention provides a stepped ventricular assist circulation pump device, which adopts a structure in which a heart blood pump is arranged in the ventricle and below the aortic valve or the pulmonary valve. Compared with the existing technology, the motor of the heart blood pump in the existing technology is retracted into 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, effectively avoiding the size of the motor itself from blocking the blood circulation process above the aortic valve or the pulmonary valve, and effectively increasing the amount of blood pumped out from the aortic valve or the pulmonary valve.

[0022] Based on this, a design for a cardiac blood pump with a stepped motor and axial flow channel is proposed. This design utilizes a motor with an internal rotor and an external stator. A fixed bracket is provided on the external portion of the external stator, fixedly connected to the axial flow channel. In vertical cross-section, the outer wall of the axial flow channel and the outer wall of the lower half of the motor housing form a descending step. This not only effectively improves the stability of the motor but also allows the fixed bracket to create a blood flow channel between the motor and the axial flow channel. In the internal rotor, a rotating portion with an impeller is also mounted on the upper end of the motor. The rotating portion is located within the blood flow channel. The end of the internal rotor facing the aortic valve or pulmonary valve is extended to the rotating portion. The internal rotor drives the impeller to rotate within the blood flow channel, effectively achieving a blood circulation effect. Furthermore, in vertical cross-section, the outer wall of the rotating portion and the outer wall of the lower half of the motor housing form an ascending step. This stepped motor design enlarges the blood flow channel, effectively increasing blood pumping capacity.

[0023] In addition, temperature sensors and pressure sensors are provided at corresponding positions of the stepped ventricular assist circulation pump device, through which the temperature and pressure values ​​of the blood pump body can be monitored in real time. When the temperature and pressure values ​​are abnormal, an alarm sound can be issued. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of a stepped ventricular assist circulation pump device connected in series with a cardiac artery tube in Example 1 of the present invention;

[0025] Figure 2 This is a left side structural schematic diagram of the stepped ventricular assist circulation pump device in Example 1 of the present invention;

[0026] Figure 3 This is a schematic diagram of the right side structure of the stepped ventricular assist circulation pump device in Example 1 of the present invention;

[0027] Figure 4 Schematic diagram of the cross-sectional structure of the stepped ventricular assist circulation pump device in Example 1 of the present invention;

[0028] 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;

[0029] Explanation of the accompanying numbers: 1-heart artery tube, 2-ventricle, 3-axial flow channel, 4-motor housing, 5-aortic valve or pulmonary valve, 6-aortic root or pulmonary artery root, 7-lead wire, 8-flanged portion, 81-assembly hole, 9-support frame, 10-inner rotor, 11-outer stator, 12-impeller, 13-winding coil, 14-permanent magnet, 15-pressure sensor, 16-temperature sensor, 17-rotating part. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Technologies, methods, and apparatus known to ordinary technicians in the relevant field may not be discussed in detail, but where appropriate, such technologies, methods, and apparatus should be considered part of the authorization specification.

[0035] 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.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments:

[0037] Example 1

[0038] like Figure 1-Figure 5 As shown, the stepped ventricular assist circulation pump device includes a ventricular assist circulation pump device connected in series with the cardiac artery tube 1, and the ventricular assist circulation pump device includes:

[0039] Axial flow channel 3, a support frame 9 is fixedly provided on the inner wall of the axial flow channel 3;

[0040] The motor includes a motor housing 4. The outer wall of the upper half of the motor housing 4 is fixedly connected to the inner wall of the axial flow channel 3 via a support frame 9. The outer wall of the lower half of the motor housing 4 is exposed outside the axial flow channel 3 and is located in the ventricle 2. The upper end of the axial flow channel 3 is provided with a radially outward flange portion 8. The flange portion 8 faces the lower surface of the aortic valve or pulmonary valve 5 and is connected to the aortic root or pulmonary artery root 6. The motor housing 4 is located in the ventricle 2.

[0041] The motor housing 4 is a hollow sleeve, the axial direction of the hollow sleeve is the same as the axial direction of the axial flow channel 3, and an inner rotor 10 and an outer stator 11 are arranged in the hollow sleeve. One of the inner rotor 10 and the outer stator 11 includes a permanent magnet 14 and one of the rotor and the stator includes a winding coil. The inner rotor 10 is rotatably installed inside the outer stator 11, and the inner rotor 10 rotates in an axial manner, driving the impeller 12 arranged above the outer wall of the upper half to rotate.

[0042] The ventricular auxiliary circulation pump device is a heart blood pump with a series configuration, such as Figure 1 As shown, the cardiac blood pump includes an axial flow channel 3 and a motor. First, the upper end of the axial flow channel 3 is provided with a radially outward flange portion 8, and the flange portion 8 faces the lower surface of the aortic valve or the pulmonary valve 5 and is connected to the aortic root or the pulmonary artery root 6, so that the cardiac blood pump and the channel in the cardiac artery tube 1 are connected in series; then, the outer wall of the upper half of the motor is fixedly connected to the inner wall of the axial flow channel 3 through the support frame 9, and the outer wall of the lower half of the motor is exposed outside the axial flow channel 3, presenting a stepped shape, forming a stepped cardiac blood pump. The stepped cardiac blood pump is arranged in the cardiac artery tube 1 and is located above the ventricle 2. It can be seen that, compared with the prior art, the motor of the present invention adopts a shortening technical means to arrange the motor in the ventricle 2, and the motor does not pass through the ventricle 2. , without causing damage to the ventricle 2, reducing the difficulty of surgery; and, the existing method of arranging the motor above the aortic valve or pulmonary valve 5 is modified to being arranged below the aortic valve or pulmonary valve 5, by forming a decreasing step shape between the outer wall of the axial flow channel 3 and the outer wall of the lower half of the motor housing 4 in the vertical cross-section, so that there is a certain gap between the motor and the axial flow channel 3, a blood flow channel can be formed below the aortic valve or pulmonary valve 5, when the driving motor provides kinetic energy, the aortic valve or pulmonary valve 5 above the flange 8 opens, and blood flows from the ventricle 2 into the cardiac artery 1, effectively avoiding the size of the motor itself from blocking the blood circulation process above the aortic valve or pulmonary valve 5, and increasing the amount of blood pumped out from the aortic valve or pulmonary valve 5.

[0043] A further preferred technical solution is: the support frame 9 includes at least one support column, one end of the support column is fixedly connected to the outer wall of the upper half of the motor housing 4, and the outer wall of the lower half of the motor housing 4 is exposed outside the axial flow channel 3; the other end of the support column is fixedly connected to the inner wall of the axial flow channel 3, so that the upper half of the motor is fixed in the axial flow channel 3, then in the vertical cross-section, the outer wall of the axial flow channel 3 and the outer wall of the lower half of the motor housing 4 form a decreasing step shape.

[0044] A further preferred technical solution is: the upper end of the motor is also connected to a rotating part 17 whose outer wall is provided with an impeller 12, the rotating part 17 is located in the axial flow channel 3, and one end of the inner stator is connected to the rotating part 17 to drive the impeller 12 to rotate; in the vertical cross-section, the outer wall of the rotating part 17 and the outer wall of the lower half of the motor housing 4 form an increasing step shape.

[0045] like Figure 2-Figure 5 As shown, based on the structure of arranging the heart blood pump above the ventricle 2 and below the aortic valve or pulmonary valve 5, the present invention designs a stepped ventricle 2 auxiliary circulation pump device, and the stepped type includes: the outer wall of the axial flow channel 3 and the outer wall of the lower half of the motor housing 4 form a decreasing step shape, and the outer wall of the rotating part 17 and the outer wall of the lower half of the motor housing 4 form an increasing step shape. Through the design of the above two steps, the present invention can effectively increase the blood pumping amount in the blood flow channel while forming a blood flow channel between the motor housing 4 and the axial flow channel 3.

[0046] Specifically, the outer wall of the axial flow channel 3 and the outer wall of the lower half of the motor housing 4 form a decreasing step shape mainly through the support frame 9. In the present invention, the motor adopts the configuration of an inner rotor 10 and an outer stator 11. One of the inner rotor 10 and the outer stator 11 includes a permanent magnet 14 and one of the rotor and the stator includes a winding coil. The inner rotor 10 refers to the motor setting the rotor on the central axis, and the outer stator 11 refers to the motor setting the stator outside the rotor. The inner rotor 10 is installed in the inner rotation of the outer stator 11, and the inner rotor 10 rotates in an axial direction. Based on the configuration of the motor, a support frame 9 can be directly welded to the motor housing 4. The support frame 9 is composed of a number of support columns. Figure 2 and Figure 3It can be seen that the shape of the support frame 9 is specifically a herringbone, which is composed of three supporting columns, one end of each supporting column is welded to the inner wall of the axial flow channel 3, and the other end of each supporting column is welded to the outer wall of the upper half of the motor housing 4, so that the upper half of the motor is fixed in the axial flow channel 3, and the outer wall of the lower half of the motor is exposed outside the axial flow channel 3. It can be seen that based on the support frame 9 connected between the motor housing 4 and the axial flow channel 3, the diameter of the motor is smaller than the diameter of the axial flow channel 3, so that the outer wall of the axial flow channel 3 and the outer wall of the lower half of the motor housing 4 form a decreasing step shape, then blood circulation can be formed between the motor housing 4 and the axial flow channel 3, and the size of the blood circulation can be adjusted by adjusting the length of the support column or the diameter of the motor, so that the present invention can assist the heart to effectively pump blood while ensuring the stability of the motor.

[0047] Specifically, the outer wall of the rotating portion 17 and the outer wall of the lower half of the motor housing 4 form an increasing stepped shape. In the present invention, the motor adopts the configuration of the inner rotor 10 and the outer stator 11, and on this basis, a rotating portion 17 is added to the motor. The rotating portion 17 is arranged in front of the motor and is connected through the inner rotor 10. Figure 4 and Figure 5 As shown in the figure, the front end of the inner rotor 10 is directed toward the aortic valve or the pulmonary valve 5, and the front end is connected to the rotating part 17 and embedded in the rotating part 17. When the inner rotor 10 rotates, the rotating part 17 in the front can be driven to rotate synchronously, and an impeller 12 is provided on the outer wall of the rotating part 17. The blood in the blood flow channel can be rotated by the impeller 12. When the diameter of the rotating part 17 is smaller than the diameter of the motor, the outer wall of the rotating part 17 and the outer wall of the lower half of the motor housing 4 form an increasing step shape, which can increase the diameter of the blood flow channel in the axial flow channel 3. The blood flow channel is increased by the design of the stepped motor, which can effectively increase the blood pumping volume.

[0048] Among them, Figure 4 As can be seen in the figure, the motor housing 4 is provided with a rotor located in the center and a stator located on the outside, namely, an inner rotor 10 and an outer stator 11. Permanent magnets can be provided on the inner rotor 10, and winding coils can be provided in the outer stator 11. Through the interaction between the winding coils and the permanent magnets, the inner rotor 10 is driven to rotate in the axial direction, thereby synchronously driving the impeller 12 on the outer wall of the rotating part 17 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 5 opens, blood is ejected from the inside of the ventricle 2 into the aortic tube.

[0049] 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 outer shell of the axial flow channel 3 .

[0050] 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 6 or for suturing with the circumferential annulus of the ventricular assist circulation pump device, the circumferential annulus of the ventricular assist circulation pump device is also used for suturing with the aortic root or the pulmonary artery root 6, 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 6, and the lead wire 7 passes through the suture body located on the lower surface and passes through the aortic root or the pulmonary artery root 6.

[0051] 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.

[0052] Based on the above principles, Figure 1-Figure 5 As shown, the stepped ventricular 2-assisted circulation pump device utilizes a flanging process, making the outer diameter of the axial flow channel 3 approximately equal to that of the cardiac artery tube 1. A flanging process is used to form a flanging portion 8 at the upper end of the axial flow channel 3. This flanging portion 8 should not be too wide; it can be formed to the dimensions of the upper and lower axes. The flanging portion 8 can be a horizontal straight flange or a curved flange. Sutures are provided on at least one of its upper and lower planes to serve as a medium for suture connection to the aortic root or pulmonary artery root 6 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 artery root 6 to suspend the stepped ventricular 2-assisted circulation pump device. The aortic root or pulmonary artery root 6 is the root portion of the heart valve, which generally grows horizontally perpendicular to the cardiac artery tube 1 and is relatively thick. The aortic root or pulmonary artery root 6 has greater toughness and can support heavier devices, 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 present invention causes less damage to the cardiac artery tube 1. Among them, the sutures in the present invention are all vertical sutures and will not appear on the inner wall of the axial flow channel 3, avoiding the risk of thrombosis.

[0053] 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 the upper suture used to suture the lower surface of the aortic root or pulmonary artery root 6 or the circumferential annulus of the ventricular assist circulatory pump device. The circumferential annulus of the ventricular assist circulatory pump device is also used to suture the aortic root or pulmonary artery root 6. The suture located on the lower surface is the lower suture used to suture the aortic root or pulmonary artery root 6. The suture includes 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 6 is also a horizontal human tissue structure. The aortic root or pulmonary artery root 6, 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 .

[0054] Specifically, the 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 suture, and the assembly holes 81 of the second diameter are used to assemble the lower end of the support rod or suture. 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, the 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 suture.

[0055] Based on the above-mentioned principle of suturing the aortic root or pulmonary artery root 6 and the cuff 8, in the present invention, as Figure 1 As shown, a design is proposed to lead out the lead wire 7 of the motor from the aortic root or the pulmonary artery root 6. Since the aortic root or the pulmonary artery root 6 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 7 of the motor from the aortic root or the pulmonary artery root 6 in the prior art, the loss to the cardiac artery tube 1 is smaller.

[0056] A further preferred technical solution is: at least one of the support columns is tubular in shape, and a lead wire 7 for driving the motor to rotate is connected to the outer wall of the motor housing 4, and the lead wire 7 passes through the axial flow channel 3 through the tubular support column to the outer wall of the axial flow channel 3.

[0057] A further preferred technical solution is: the lead wire 7 extends along the outer wall of the axial flow channel 3 to the lower surface of the flange portion 8 on the outer wall of the axial flow channel 3, and then extends radially outward along the flange portion 8 until it is led out from the aortic root or the pulmonary artery root 6.

[0058] like Figure 1-Figure 5 As shown, the lead wire 7 refers to a wire used to drive the motor for power supply. The wire needs to be led out of the ventricular auxiliary circulation pump device 2 to realize the driving motor to provide kinetic energy. When the lead wire 7 is led out from the motor housing 4, the lead wire 7 will enter the blood flow channel. If the routing of the lead wire 7 is not adjusted, the presence of the lead wire 7 in the blood flow channel will affect the amount of blood pumped out of the blood flow channel. For example, when there are more lead wires 7 in the blood flow channel, the lead wire 7 itself will block the pumping of blood in the blood flow channel. The present invention combines the lead wire 7 with a support frame 9 fixed to the motor housing 4. The support frame 9 is composed of a tubular support column. The support column can be a hollow rod. The lead wire 7 led out from the motor housing 4 is embedded in the hollow rod, so that the lead wire 7 is not directly routed in the blood flow channel, avoiding blocking the outflow of blood in the blood flow channel and reducing the impact on blood outflow.

[0059] Furthermore, a new routing path is proposed for the lead wire 7, which can guide the lead wire 7 to be led out from the aortic root or the pulmonary artery root 6. Since the stepped ventricular 2 auxiliary circulation pump device adopts a flange portion 8 to achieve a series structure, the flange portion 8 adopts the principle of suturing with the aortic root or the pulmonary artery root 6. 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 an 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 6 or for suturing with the circumferential annulus of the ventricular 2 auxiliary circulation pump device. The circumferential annulus of the ventricular 2 auxiliary circulation pump device is also used for suturing with the aortic root or the pulmonary artery root 6. 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 6. The lead wire 7 passes through the suture body located on the lower surface and passes through the aortic root or the pulmonary artery root 6.

[0060] A further preferred technical solution is: a temperature sensor 16 is attached around the inner wall of the motor housing 4 , and the wires of the temperature sensor 16 and the lead wires 7 are bundled on the outer wall of the motor housing 4 .

[0061] A further preferred technical solution is: a groove extending toward the lead wire 7 is provided on the inner wall of the axial flow channel 3, and a pressure sensor 15 is provided inside the groove at both ends of the groove, and the wires of the pressure sensor 15 and the lead wire 7 are bundled on the inner wall of the axial flow channel 3.

[0062] like Figure 5 As shown, corresponding temperature sensors 16 and pressure sensors 15 are also provided for the stepped ventricular auxiliary circulation pump device. Based on the routing direction of the lead-out wire 7, the temperature sensor 16 can be pasted around the lead-out point of the lead-out wire 7, that is, the temperature sensor 16 is pasted around the inner wall of the motor housing 4, so that the wires of the temperature sensor 16 can be bundled with the lead-out wire 7 at the motor housing 4, reducing the influence of the wires of the temperature sensor 16 on the blood circulation in the blood flow channel. In addition, the temperature sensor 16 can monitor the temperature of the motor in real time. When the temperature exceeds the limit value, an alarm can be sounded, which avoids the device from being in long-term high-temperature operation and can effectively extend the service life of the device.

[0063] At the same time, a groove is defined within the axial flow channel 3, housing pressure sensors 15 at either end. One pressure sensor 15 is located near the aortic or pulmonary valve 5, and the other near the ventricle 2. In other words, the pressure sensors 15 are mounted at the entrance and exit of the blood flow channel, respectively, allowing the rotational speed of the inner rotor 10 to be adjusted based on pressure changes. Furthermore, the grooves housing the pressure sensors 15 extend toward the lead wires 7, facilitating bundling the lead wires of the pressure sensors 15 within the grooves with the lead wires 7, thereby minimizing the impact of the pressure sensor 15 wires on blood flow within the blood flow channel.

[0064] 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. A stepped ventricular assist circulation pump device, characterized in that: The invention comprises a ventricular assist circulation pump device connected in series with a cardiac artery tube (1) or a pulmonary artery tube, wherein the ventricular assist circulation pump device comprises: An axial flow channel (3), with a support frame (9) fixedly provided on the inner wall of the axial flow channel (3); The motor comprises a motor housing (4), wherein the outer wall of the upper half of the motor housing (4) is fixedly connected to the inner wall of the axial flow channel (3) via a support frame (9), and the outer wall of the lower half of the motor housing (4) is exposed outside the axial flow channel (3) and is located in the ventricle (2), and the upper end of the axial flow channel (3) is provided with a radially outward flange portion (8), and the flange portion (8) faces the lower surface of the aortic valve or the pulmonary valve (5) and is connected to the aortic root or the pulmonary artery root (6), the axial flow channel and the motor are located in the ventricle (2), and the ventricular assist circulation pump device is located in the ventricle; The support frame (9) includes at least one support column, one end of the support column is fixedly connected to the outer wall of the upper half of the motor housing (4), and the other end of the support column is fixedly connected to the inner wall of the axial flow channel (3); at least one of the support columns is tubular in shape, and a lead wire (7) for driving the motor to rotate is connected to the outer wall of the motor housing (4), and the lead wire (7) passes through the tubular support column and penetrates the axial flow channel (3) to the outer wall of the axial flow channel (3), and the lead wire (7) extends on the outer wall of the axial flow channel (3) along the outer wall of the axial flow channel (3) 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 (6); The motor housing (4) is a hollow sleeve, the axial direction of the hollow sleeve is the same as the axial direction of the axial flow channel (3), an inner rotor (10) and an outer stator (11) are arranged in the hollow sleeve, one of the inner rotor (10) and the outer stator (11) includes a permanent magnet (14) and one of the rotor and the stator includes a winding coil, the inner rotor (10) is rotatably mounted inside the outer stator (11), the inner rotor (10) rotates in an axial direction, and drives the impeller (12) arranged above the outer wall of the upper half to rotate.

2. The stepped ventricular assist circulation pump device according to claim 1, characterized in that: On a vertical cross-section, the outer wall of the axial flow channel (3) and the outer wall of the lower half of the motor housing (4) form a descending step shape.

3. The stepped ventricular assist circulation pump device according to claim 1, characterized in that: The upper end of the motor is also connected to a rotating portion (17) having an impeller (12) provided on its outer wall. The rotating portion (17) is located in the axial flow channel (3). One end of the inner rotor (10) is connected to the rotating portion (17) to drive the impeller (12) to rotate. In a vertical cross-section, the outer wall of the rotating portion (17) and the outer wall of the lower half of the motor housing (4) form an increasing stepped shape.

4. The stepped ventricular assist circulation pump device according to claim 1, characterized in that: A temperature sensor (16) is attached around the inner wall of the motor housing (4), and the lead wires and lead wires (7) of the temperature sensor (16) are bundled on the outer wall of the motor housing (4).

5. The stepped ventricular assist circulation pump device according to claim 1, characterized in that: A groove extending toward the lead wire (7) is provided on the inner wall of the axial flow channel (3), and pressure sensors (15) are provided inside the groove at both ends of the groove. The wires of the pressure sensor (15) and the lead wire (7) are bundled on the inner wall of the axial flow channel (3).

6. The stepped ventricular assist circulation 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 outer shell of the axial flow channel (3).

7. The stepped ventricular assist circulation pump device according to claim 6, 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 (6) or for suturing with the circumferential annulus of the ventricular assist circulation pump device. The circumferential annulus of the ventricular assist circulation pump device is also used for suturing with the aortic root or the pulmonary artery root (6). 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 (6). The lead wire (7) passes through the suture body located on the lower surface and passes through the aortic root or the pulmonary artery root (6).

8. The stepped ventricular assist circulation pump device according to claim 7, 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.

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