Magnetic coupling driven intraventricular paddle assist pressurization system

Abstract

The application discloses a magnetic coupling driven intraventricular paddle auxiliary pressurizing system and relates to the technical field of medical devices. The application can solve a series of problems caused by the integral design of the motor and the paddle of the existing intraventricular auxiliary pressurizing device. The application discloses a magnetic coupling driven intraventricular paddle auxiliary pressurizing system, which comprises a paddle part for being sutured and fixed on the intraventricular wall and a driving part for being sutured and fixed on the extracardiac wall. The paddle part comprises an inner sleeve, a paddle structure and a driven magnetic disk coaxially fixedly connected with the paddle structure, and the paddle structure is rotationally connected in the inner sleeve. The driving part comprises an outer sleeve, a driving motor and a driving magnetic disk coaxially fixedly connected with the output shaft of the driving motor, and the driving motor is fixed in the outer sleeve. In the sutured and fixed state of the paddle part and the driving part, the driven magnetic disk is coaxial with the driving magnetic disk and is magnetically coupled. The paddle structure is driven to rotate by the driving motor through the magnetically coupled driving magnetic disk and driven magnetic disk.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a magnetically coupled intracardiac paddle-assisted pressurization system. Background Technology

[0002] A ventricular assist device (VAP) is a medical device used to assist the ventricles in pumping blood in patients with severe heart failure. It partially or completely replaces the heart's pumping function by mechanically pumping blood, supporting and maintaining blood circulation in the patient's body.

[0003] Left ventricular assist devices (LVAPs) are one of the most common applications. Their core mechanical component is a centrifugal or axial-flow LVAP device implanted within the ventricle to propel blood flow. However, in existing LVAPs, both the impeller that propels blood flow and the motor that drives it are implanted within the left ventricle, with the power cable routed from the heart wall tissue to the outside. This method, where both the impeller and motor are implanted within the ventricle, requires extremely high sealing, and the motor casing is in direct contact with the blood, posing a series of problems such as potential damage to the blood due to heat dissipation from the motor.

[0004] Based on the above background, the inventors designed a magnetically coupled intracardiac paddle-assisted pressurization system to solve at least one of the above problems, and thus, this application is filed. Summary of the Invention

[0005] The purpose of this application is to provide a magnetically coupled intraventricular paddle-assisted pressurization system to solve a series of problems caused by the integrated design of the motor and paddle in existing intraventricular assist pressurization devices.

[0006] To address the above problems, this application provides the following technical solution:

[0007] This application provides a magnetically coupled intracardiac paddle-assisted pressurization system, comprising a paddle portion for suturing and fixing to the intracardiac wall, and a drive portion for suturing and fixing to the outer wall of the heart, wherein:

[0008] The blade section includes an inner sleeve and a blade structure, as well as a driven disk coaxially and fixedly connected to the blade structure. The blade structure is rotatably connected inside the inner sleeve.

[0009] The drive unit includes an outer tube and a drive motor, as well as an active disk that is coaxially and fixedly connected to the output shaft of the drive motor. The drive motor is fixed inside the outer tube.

[0010] With the blade section and drive section sewn together and fixed in place, the driven disk is coaxial with and magnetically coupled to the active disk, and the blade structure is driven to rotate by the drive motor through the magnetically coupled active and driven disks.

[0011] Optionally, the inner sleeve is provided with an inner heart wall blocking piece at one end for suturing to the inner wall of the ventricle, and / or the outer sleeve is provided with an outer heart wall blocking piece at one end for suturing to the outer wall of the heart.

[0012] The material of the outer heart wall blocking piece and the inner heart wall blocking piece is non-magnetic material.

[0013] Optionally, gaps are provided between the inner heart wall blocking piece and the driven magnetic disc, and between the outer heart wall blocking piece and the driven magnetic disc.

[0014] Optionally, the paddle portion is further provided with a flow guide fixed shell rotatably connected to the inner sleeve, the flow guide fixed shell is fixedly and sealingly connected to the bottom of the paddle structure, and the driven magnetic disc is fixed to the bottom of the flow guide fixed shell and sealingly connected thereto.

[0015] The inner sleeve is provided with a plurality of liquid inlet ports distributed circumferentially on the flow guide fixed shell.

[0016] Optionally, a rotating shaft is further provided between the driven magnetic disc and the bottom of the paddle structure, the two ends of the rotating shaft are fixedly connected to the driven magnetic disc and the paddle structure respectively, and the driven magnetic disc, the rotating shaft and the paddle structure are coaxially arranged.

[0017] The flow guide fixed shell is provided with a weight-reducing cavity.

[0018] Optionally, a bearing assembly is provided between the inner sleeve of the paddle portion and the flow guide fixed shell, the bearing assembly comprises an outer ring structure, an inner ring structure and a plurality of rolling elements located between the outer ring structure and the inner ring structure.

[0019] The outer ring structure is fixed to the inner circumferential wall of the inner sleeve, and the inner ring structure is fixedly sleeved on the flow guide fixed shell.

[0020] Optionally, the bottom of the liquid inlet port is a slope, the top of the outer ring structure is also a slope and has the same slope as the slope of the bottom of the liquid inlet port, and the lower end of the outer ring structure and the higher end of the liquid inlet port are connected and coincided with each other.

[0021] Optionally, the part of the flow guide fixed shell between the paddle structure and the driven magnetic disc is gradually gathered in the direction from the driven magnetic disc to the paddle structure, and the specific shape is a concave horn shape.

[0022] Optionally, the inner sleeve is provided with an inner suturing skirt at one end for suturing to the inner wall of the ventricle.

[0023] The outer sleeve is provided with an outer suturing skirt at one end for suturing to the outer wall of the heart.

[0024] Optionally, the inner suturing skirt and the outer suturing skirt are respectively provided with an inner positioning hole and an outer positioning hole for alignment during suturing.

[0025] In the state that the paddle part and the driving part are fixed by sewing, the central axes of the inner positioning hole and the outer positioning hole coincide with each other.

[0026] Advantages of the present application:

[0027] The paddle part and the driving part are separated in the present application, and the active magnetic disk and the driven magnetic disk are arranged on the power transmission path of the paddle structure of the paddle part and the driving motor of the driving part, so that the paddle part and the driving part can be fixed in the left ventricle outside by sewing respectively, and a series of problems caused by the integral fixing mode of the motor and the paddle in the prior art, i.e. the driving motor must be fixed in the left ventricle, are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a sectional view of the structure of the paddle part in the embodiment of the present application.

[0029] Figure 2 It is a sectional view of the structure of the paddle part in the embodiment of the present application.

[0030] Figure 3 It is Figure 2 It is an enlarged view of part A in FIG. 6.

[0031] Figure 4 It is a sectional view of the structure of the driving part in the embodiment of the present application.

[0032] Figure 5 It is a sectional view of the structure of the paddle part in the embodiment of the present application.

[0033] BRIEF DESCRIPTION OF DRAWINGS

[0034] 1-paddle part, 11-inner sleeve, 111-inner sewing skirt, 112-liquid inlet, 12-paddle structure, 13-driven magnetic disk, 14-inner heart wall blocking piece, 15-flow guide fixing shell, 151-weight reduction cavity, 16-rotating shaft, 17-bearing assembly, 171-outer ring structure, 172-inner ring structure, 173-rolling element, 2-driving part, 21-outer sleeve, 211-outer sewing skirt, 22-driving motor, 23-active magnetic disk, 24-outer heart wall blocking piece, 31-left ventricle. DETAILED DESCRIPTION

[0035] The present application will be further described in detail below in combination with the embodiments and the drawings, but the embodiments of the present application are not limited thereto.

[0036] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "back", "top", "bottom", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed during use, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements 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.

[0037] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "provided", "opened", "mounted", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; 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 communication inside two elements. 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.

[0038] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0039] As shown in Figures 1 to 5 The present embodiment provides a magnetically coupled driven intraventricular paddle auxiliary pressurization system, which comprises a paddle part 1 for being sutured and fixed on the intraventricular wall, and a driving part 2 for being sutured and fixed on the extracardiac wall, wherein:

[0040] The paddle part 1 comprises an inner sleeve 11 and a paddle structure 12, and a driven magnetic disk 13 coaxially fixedly connected with the paddle structure 12, and the paddle structure 12 is rotationally connected in the inner sleeve 11;

[0041] The driving part 2 comprises an outer sleeve 21 and a driving motor 22, and a driving magnetic disk 23 coaxially fixedly connected with the output shaft of the driving motor 22, and the driving motor 22 is fixed in the outer sleeve 21;

[0042] In the sutured and fixed state of the paddle part 1 and the driving part 2, the driven magnetic disk 13 is coaxial with the driving magnetic disk 23 and magnetically coupled, and the paddle structure 12 is driven to rotate by the driving motor 22 through the magnetically coupled driving magnetic disk 23 and driven magnetic disk 13.

[0043] The paddle part 1 and the driving part 2 are separated in the embodiment, and the driving magnetic disk 23 and the driven magnetic disk 13 are arranged on the power transmission path of the paddle structure 12 of the paddle part 1 and the driving motor 22 of the driving part 2, so that the paddle part 1 and the driving part 2 can be respectively sutured and fixed inside and outside the left ventricle 31, avoiding the problems that the driving motor 22 must be fixed inside the left ventricle 31 caused by the integral fixing mode of the motor and the paddle in the prior art.

[0044] In the embodiment, the coupled driven magnetic disk 13 and the driving magnetic disk 23 are prior art, and when the driving motor 22 rotates and further drives the driving magnetic disk 23 to rotate, the driving magnetic disk 23 can apply torque to the coupled driven magnetic disk 13, and further drive the paddle structure 12 to rotate in the inner sleeve 11, thereby assisting the blood in the left ventricle 31 to be pressurized.

[0045] The benefits of the split design of the paddle part 1 and the driving part 2 in the embodiment are obvious. First, the wire supplying current to the driving motor 22 does not need to pass through the heart wall tissue, and second, the driving motor 22 does not need to be completely immersed in the blood in the left ventricle 31, and the sealing problem and the heat dissipation problem need to be considered. In addition, under the technical idea of split design, the service life of the paddle part 1 without circuit design can be greatly improved. Even if the driving motor 22 of the driving part 2 has a problem or needs to be replaced by a driving motor 22 of a different model to meet different driving forces, the technical idea of split magnetic coupling driving in the embodiment is more convenient.

[0046] In the embodiment, the inner sleeve 11 is provided with an inner heart wall blocking piece 14 at one end for suturing the inner wall of the heart chamber, and the outer sleeve 21 is provided with an outer heart wall blocking piece 24 at one end for suturing the outer wall of the heart.

[0047] The material of the outer heart wall blocking piece 24 and the inner heart wall blocking piece 14 is non-magnetic. In the embodiment, due to the characteristics of magnetic coupling, the distance between the driving magnetic disc 23 and the driven magnetic disc 13 should not be too far, so in the embodiment, the driving magnetic disc 23 and the driven magnetic disc 13 are fixed as close to the heart wall tissue as possible. However, due to the particularity of the application, under normal circumstances, the heart is in a constant beating state. When the heart beats, the heart wall tissue will contract and relax to a certain extent, resulting in a certain degree of change in its thickness. When the heart contracts, the heart wall tissue will move closer to the driving magnetic disc 23 and the driven magnetic disc 13. The driving magnetic disc 23 and the driven magnetic disc 13 need to rotate continuously, which may cause the driving magnetic disc 23 and the driven magnetic disc 13 to rub against the heart wall tissue. Therefore, in order to avoid this problem, the inner heart wall blocking piece 14 and the outer heart wall blocking piece 24 without magnetism are arranged to form a protective layer structure between the driving magnetic disc 23 and the driven magnetic disc 13 and the heart wall tissue, so as to avoid friction between the driving magnetic disc 23 and the driven magnetic disc 13. The inner heart wall blocking piece 14 and the outer heart wall blocking piece 24 in the embodiment are made of existing materials, and both are flexible materials, which can avoid excessive extrusion on the heart wall tissue.

[0048] In the embodiment, the inner heart wall blocking piece 14 and the driven magnetic disc 13, and the outer heart wall blocking piece 24 and the driving magnetic disc 23 have gaps, which can provide sufficient allowance for the deformation of the heart wall tissue and the deformation of the inner heart wall blocking piece 14 and the outer heart wall blocking piece 24.

[0049] In the embodiment, the paddle part 1 further comprises a flow guide fixed shell 15 rotatably connected with the inner sleeve 11. The flow guide fixed shell 15 is fixedly and sealingly connected with the bottom of the paddle structure 12. The driven magnetic disc 13 is fixed to the bottom of the flow guide fixed shell 15 and sealingly connected therewith.

[0050] The inner sleeve 11 is provided with a plurality of liquid inlet ports 112 distributed in the circumferential direction of the flow guide fixed shell 15. By arranging the liquid inlet ports 112 on the inner sleeve 11 and the flow guide fixed shell 15, the blood flowing in the left ventricle 31 can be guided and the blood entering the inner catheter can be quickly guided to the rear end of the paddle structure 12, so that the blood can be pressurized and pushed to the position of the aortic valve by the paddle structure 12.

[0051] In the embodiment, a rotating shaft 16 is arranged between the driven magnetic disc 13 and the bottom of the paddle structure 12. The two ends of the rotating shaft 16 are fixedly connected with the driven magnetic disc 13 and the paddle structure 12 respectively. The driven magnetic disc 13, the rotating shaft 16 and the paddle structure 12 are coaxially arranged.

[0052] The weight reduction cavity 151 is arranged in the flow guide fixed shell 15, the rotating shaft 16 is arranged, the power transmission stability between the driven magnetic disc 13, the rotating shaft 16 and the paddle structure 12 can be improved, and the weight reduction cavity 151 arranged in the flow guide fixed shell 15 can reduce the weight of the paddle part 1, and the burden of the heart beating can be reduced.

[0053] In the embodiment, the bearing assembly 17 is arranged between the inner sleeve 11 of the paddle part 1 and the flow guide fixed shell 15, and the bearing assembly 17 comprises an outer ring structure 171, an inner ring structure 172 and a plurality of rolling elements 173 arranged between the outer ring structure 171 and the inner ring structure 172.

[0054] The outer ring structure 171 is fixed to the inner circumferential wall of the inner sleeve 11, the inner ring structure 172 is fixedly sleeved on the flow guide fixed shell 15, the bearing assembly 17 is arranged, the resistance of the flow guide fixed shell 15, the paddle structure 12, the rotating shaft 16 and the driven magnetic disc 13 and the like relative to the inner sleeve 11 when rotating can be reduced, and the auxiliary pressurization efficiency of the paddle part 1 can be improved.

[0055] In the embodiment, the bottom of the liquid inlet 112 is a slope, the top of the outer ring structure 171 is also a slope and the slope is the same as the slope of the bottom of the liquid inlet 112, and the lower end of the outer ring structure 171 is coincided with the higher end of the liquid inlet 112, in the embodiment, the bottom of the liquid inlet 112 is improved to be a slope, the top of the outer ring structure 171 is also arranged to be a slope, and the lower end of the outer ring structure 171 is coincided with the higher end of the liquid inlet 112, so that the blood flowing into the inner sleeve 11 from the left ventricle 31 is inclined upward when flowing, which is more conducive to the subsequent flow diversion at the position of the flow guide fixed shell 15 below the paddle structure 12.

[0056] In the embodiment, as shown in Figure 3 The higher end of the top of the outer ring structure 171 is arranged close to the flow guide fixed shell 15, so that the blood can be quickly diverted to the outer periphery of the flow guide fixed shell 15 after passing through the outer ring structure 171, and in the embodiment, since the higher end of the top of the outer ring structure 171 extends close to the flow guide fixed shell 15, the top section of the inner ring structure 172 is also an adaptive right triangle, so as to avoid the problem of blood accumulation for a long time due to the existence of excess gaps between the inner ring structure 172, the outer ring structure 171 and the flow guide fixed shell 15. Of course, the top of the inner ring structure 172 can also be designed as a plane in some embodiments, which will not be described here.

[0057] In the embodiment, as shown in Figure 2As shown, the portion of the flow guide fixed shell 15 between the paddle structure 12 and the driven magnetic disk 13 gradually converges in the direction from the driven magnetic disk 13 to the paddle structure 12, and has a specific shape of an inwardly concave horn, which can further improve the flow guiding effect of blood.

[0058] In this embodiment, the inner sleeve 11 is provided with a flexible inner suture skirt 111 at one end for suturing to the inner wall of the ventricle.

[0059] The outer sleeve 21 is provided with a flexible outer suture skirt 211 at one end for suturing to the outer wall of the heart. The inner sleeve 11 and the outer sleeve 21 are respectively sutured and fixed to the heart wall tissue through the inner suture skirt 111 and the outer suture skirt 211. The inner suture skirt 111 and the outer suture skirt 211 are flexible, so that the inner sleeve 11 and the outer sleeve 21 can be appropriately shaped to irregular heart wall tissue during suturing.

[0060] In this embodiment, the inner suture skirt 111 and the outer suture skirt 211 are respectively provided with inner positioning holes and outer positioning holes (not shown in the figure) for alignment during suturing.

[0061] In the sutured and fixed state of the paddle portion 1 and the driving portion 2, the central axes of the inner positioning holes and the outer positioning holes coincide with each other. By providing the inner positioning holes and the outer positioning holes, the operator can conveniently position during surgery, and avoid the problem that the driving magnetic disk 23 and the driven magnetic disk 13 cannot be coupled to transmit torque after the paddle portion 1 and the driving portion 2 are sutured and fixed. In some embodiments, a fixed rod member that penetrates the inner positioning holes and the outer positioning holes and the heart wall tissue can also be provided to further position and fix, for example, a screw rod that penetrates the inner positioning holes and the outer positioning holes and the heart wall tissue, with the screw rod head located in the left ventricle 31, and a nut that is screwed to the screw rod is installed at the outer positioning hole outside the heart, to play a positioning and auxiliary fixing role.

[0062] It can be understood that the above embodiments are only exemplary embodiments adopted to illustrate the principles of the present application, and the present application is not limited thereto. Various modifications and improvements can be made by those of ordinary skill in the art without departing from the spirit and essence of the present application, and these modifications and improvements are also considered within the protection scope of the present application.

Claims

1. A magnetically coupled, intraventricular paddle-assisted pressurization system, characterized in that, The paddle part (1) is fixed on the inner wall of the ventricle by sewing, and the driving part (2) is fixed on the outer wall of the heart by sewing, wherein: The paddle part (1) comprises an inner sleeve (11) and a paddle structure (12), and a driven magnetic disk (13) coaxially fixedly connected with the paddle structure (12), the paddle structure (12) being rotationally connected in the inner sleeve (11); The driving part (2) comprises an outer sleeve (21) and a driving motor (22), and a driving magnetic disk (23) coaxially fixedly connected with the output shaft of the driving motor (22), the driving motor (22) being fixed in the outer sleeve (21); In the state that the paddle part (1) and the driving part (2) are fixed by sewing, the driven magnetic disk (13) is coaxial with the driving magnetic disk (23) and magnetically coupled, and the paddle structure (12) is driven to rotate by the driving motor (22) through the magnetically coupled driving magnetic disk (23) and driven magnetic disk (13); The paddle part (1) further comprises a flow guide fixed shell (15) rotationally connected with the inner sleeve (11), the flow guide fixed shell (15) being fixedly and sealingly connected with the bottom of the paddle structure (12), and the driven magnetic disk (13) being fixed to the bottom of the flow guide fixed shell (15) and sealingly connected therewith; The inner sleeve (11) is provided with a plurality of liquid inlet ports (112) distributed circumferentially on the flow guide fixed shell (15).

2. The magnetically coupled, intraventricular paddle assisted pressurization system of claim 1, wherein, The inner sleeve (11) is provided with an inner heart wall blocking piece (14) at one end for sewing on the inner wall of the ventricle, and / or the outer sleeve (21) is provided with an outer heart wall blocking piece (24) at one end for sewing on the outer wall of the heart. The outer heart wall blocking piece (24) and the inner heart wall blocking piece (14) are both made of non-magnetic material.

3. The magnetically coupled, intraventricular paddle assisted pressurization system of claim 2, wherein, There are gaps between the inner heart wall blocking piece (14) and the driven magnetic disk (13), and between the outer heart wall blocking piece (24) and the driving magnetic disk (23).

4. The magnetically coupled, intraventricular paddle assisted pressurization system of claim 1, wherein, The driven magnetic disk (13) and the bottom of the paddle structure (12) are further provided with a rotating shaft (16), the two ends of the rotating shaft (16) being fixedly connected with the driven magnetic disk (13) and the paddle structure (12) respectively, and the driven magnetic disk (13), the rotating shaft (16) and the paddle structure (12) being coaxially arranged; The flow guide fixed shell (15) is provided with a weight-reducing cavity (151).

5. The magnetically coupled, intraventricular paddle assisted pressurization system of claim 1, wherein, The inner sleeve (11) and the flow guide fixed shell (15) of the paddle part (1) are provided with a bearing assembly (17), the bearing assembly (17) comprising an outer ring structure (171), an inner ring structure (172) and a plurality of rolling elements (173) located between the outer ring structure (171) and the inner ring structure (172); The outer ring structure (171) is fixed on the inner circumferential wall of the inner sleeve (11), and the inner ring structure (172) is fixedly sleeved on the flow guide fixed shell (15).

6. The magnetically coupled, intraventricular paddle-assisted pressurization system of claim 5, wherein, The bottom of the liquid inlet port (112) is beveled, the top of the outer ring structure (171) is also beveled and has the same slope as the slope of the bottom of the liquid inlet port (112), and the lower end of the outer ring structure (171) is connected with the higher end of the liquid inlet port (112).

7. The magnetically coupled, intraventricular paddle assisted pressurization system of claim 1, wherein, The portion of the flow guide fixed shell (15) between the paddle structure (12) and the driven magnetic disk (13) gradually converges from the driven magnetic disk (13) to the paddle structure (12).

8. The magnetically coupled, intraventricular paddle assisted pressurization system of claim 1, wherein, The inner sleeve (11) is used for suturing the inner wall of the ventricle, and one end of the inner sleeve (11) is provided with an inner suturing skirt (111). The outer sleeve (21) is used for suturing the outer wall of the heart, and one end of the outer sleeve (21) is provided with an outer suturing skirt (211).

9. The magnetically coupled, intraventricular paddle-assisted pressurization system of claim 8, wherein, The inner suturing skirt (111) and the outer suturing skirt (211) are respectively provided with inner positioning holes and outer positioning holes for alignment during suturing. In the state that the paddle part (1) and the driving part (2) are sutured and fixed, the central axes of the inner positioning holes and the outer positioning holes coincide with each other.

Images