Implantable blood circulation assist device, control method therefor, and implantation method therefor

Abstract

Disclosed are an implantable blood circulation assist device, a control method therefor, and an implantation method therefor. The device comprises: a first cavity enclosed by a first housing; a second cavity enclosed by a second housing, wherein the first housing and the second housing have contractility and expansibility, the interior of the cavities are in communication, and both ends are open; a first valve at a first port of the first cavity; a second valve between a second port of the first cavity and a first port of the second cavity; a third valve at a second port of the second cavity, wherein the first valve to the third valve each comprise a valve ring and valve leaflets, the valve leaflets move relative to the valve ring, when closed, the ports of the cavities are obstructed, and when opened, the ports of the cavities are unobstructed; and a supporting and fixing structure used for fixing, supporting and communicating the components. The active opening and closing of the valves, as well as the sequential contraction and expansion of the first housing and the second housing, are controlled to achieve unidirectional flow of blood. The device can be implanted into large blood vessels and heart chambers without destroying the structural and functional integrity of the heart and blood cells, which distinguishes it from rotary pump artificial hearts.

Description

Implantable circulatory assist device, its control method and implantation method Technical Field

[0001] This disclosure relates to the field of implantable medical devices, and more specifically, to an implantable blood circulation assist device and its control and implantation methods. Background Technology

[0002] Heart transplantation is a valuable treatment for end-stage heart failure, but due to the limited number of heart donors, it is difficult to meet the needs of a large number of patients. Implantation of an artificial heart is an alternative to heart transplantation. Currently, most methods use high-speed rotating mechanical pumps to assist circulation. On the one hand, the tubing for implanting an artificial heart needs to traverse the heart or the inside and outside of the body, resulting in significant surgical trauma and a high rate of secondary infection. On the other hand, the high-speed rotating impeller of the mechanical pump damages blood cells, and the continuous, non-periodic jet of blood supply not only consumes a lot of energy and has a high rate of thrombosis, but also does not conform to the physiological laws of blood circulation in other organs, leading to numerous complications.

[0003] A newly adopted method of using an intracardiac catheter with a rotating tip connected to an external mechanical pump to assist left ventricular circulation avoids the surgical trauma of implanting an artificial heart. However, this type of device cannot be implanted in the heart chamber for extended periods and can only be used as a temporary emergency measure. The rotating micropump at the catheter tip is small in size and has limited continuous jet flow, which cannot meet the physiological needs of pulsatile blood flow in organs.

[0004] Physiologically, the heart relies on the periodic relaxation and contraction of the myocardial cavity walls to draw in or expel blood, propelling blood circulation. Generally, a change in left ventricular volume greater than 20% is sufficient to maintain basic bodily functions; this translates to a diameter change of approximately 7%. Under normal conditions, the volume change of the left ventricle is between 45% and 55%, and the diameter change is approximately 15% to 18%. During exercise, the volume change is approximately 70%, and the diameter change is approximately 21%. Current materials such as shape memory alloys, dielectric elastics, and electroactive polymers can change shape and size with the application and deactivation of electrical current; a linear change of more than 20% can simulate the periodic contraction and relaxation of the myocardium. This provides the theoretical and material basis for developing blood circulation assist devices that do not rely on impeller pumps. These materials are currently used in the manufacture of the contraction and relaxation membranes of artificial jellyfish diving devices, the fins and tails of artificial fish, the wings of artificial bird flight vehicles, and artificial muscles for robots. Summary of the Invention

[0005] In view of this, the present disclosure provides an implantable blood circulation assist device and its control and implantation methods to solve some problems existing in the existing blood circulation assist technology.

[0006] In a first aspect, embodiments of this disclosure provide an implantable blood circulation assist device, comprising:

[0007] The first outer shell forms a first cavity that is internally continuous and open at both ends;

[0008] The second outer shell forms a second cavity that is internally connected and open at both ends; the first outer shell and the second outer shell are scalable.

[0009] A first valve is disposed at the first port of the first cavity;

[0010] A second valve is disposed between the second port of the first cavity and the first port of the second cavity;

[0011] A third valve is disposed at the second port of the second cavity, wherein the first valve to the third valve respectively include a valve annulus and a valve leaflet movable relative to the valve annulus, and when the valve leaflet is closed relative to the valve annulus, it blocks the corresponding cavity port; when the valve leaflet is open relative to the valve annulus, the corresponding cavity port is opened.

[0012] A support and fixing structure is used to fix and support the first outer shell, the second outer shell, the first valve to the third valve;

[0013] The unidirectional flow of blood is controlled by controlling the sequential opening and closing of the leaflets of the first to third valves relative to the valve annulus, and by controlling the overall contraction and relaxation of the first and second outer shells.

[0014] In some embodiments, the implantable blood circulation assist device further includes: a traction rope, fixedly connected to the support and fixation structure and the leaflet, and pulling the leaflet to open and close the leaflet relative to the valve annulus.

[0015] In some embodiments, the implantable blood circulation assist device further includes: a magnetic ring fixedly connected to the support and fixation structure and a permanent magnet sheet disposed on the leaflet, and the magnetic ring is alternately energized and de-energized to realize the opening and closing of the leaflet relative to the valve annulus through magnetic force.

[0016] In some embodiments, the implantable blood circulation assist device further includes a traction cord, which serves as a limiting component to prevent leaflet dislocation.

[0017] In some embodiments, the first housing and the second housing contract as a whole when energized and expand as a whole when de-energized; or the first housing and the second housing contract as a whole when de-energized and expand as a whole when energized.

[0018] In some embodiments, the implantable blood circulation assist device is shaped and placed into a delivery catheter, and after being implanted in the body via the delivery catheter, it returns to its pre-shaped form.

[0019] In some embodiments, the implantable blood circulation assist device includes a first portion and a second portion bounded by the second valve, wherein the first portion is prefabricated as a column and the second portion is prefabricated as a bent column.

[0020] In some embodiments, the support and fixing structure includes a plurality of support columns and a support ring.

[0021] In some embodiments, the first and second housings are made of shape memory alloys, dielectric elastics, or electroactive polymers.

[0022] In some embodiments, the traction rope is made of shape memory alloy, dielectric elastic material or electroactive polymer.

[0023] In some embodiments, the implantable blood circulation assist device further includes a sensory stimulator disposed on the support fixation structure.

[0024] In some embodiments, the implantable blood circulation assist device further includes a battery box and a circuit box disposed on the support and fixation structure.

[0025] In some embodiments, the implantable blood circulation assist device further includes connection lines for each component encapsulated within the support and fixation structure and an external power supply line disposed on the support structure.

[0026] Secondly, embodiments of this disclosure provide a control method for an implantable blood circulation assist device. The implantable blood circulation assist device includes a first housing forming a first cavity, a second housing forming a second cavity, and a first valve, a second valve, and a third valve respectively disposed at each port of the first cavity and the second cavity. The first housing and the second housing are contractile. The control method includes the following steps:

[0027] Control the closure of the third valve;

[0028] Control the opening of the second valve;

[0029] Control the contraction of the second outer shell to reduce the volume of the second cavity, squeezing blood into the first cavity;

[0030] Control the closure of the second valve;

[0031] Control the opening of the first valve;

[0032] Control the first outer shell to contract, so that the volume of the first cavity becomes smaller, squeezing the blood in the first container to flow out in one direction;

[0033] The third valve is controlled to open, so as to draw blood into the second cavity;

[0034] Repeat the above steps to achieve unidirectional circulation of blood propelled through the dual-cavity system.

[0035] In some embodiments, the first valve, the second valve, and the third valve include a valve annulus and valve leaflets that move relative to the valve. The opening and closing of the cavity port is achieved by controlling the sequential opening and closing of the valve leaflets of the first valve to the third valve relative to the valve annulus.

[0036] In some embodiments, the control method further includes controlling the first housing and the second housing to move synchronously to increase the volume change of the first cavity and the second cavity.

[0037] Thirdly, embodiments of this disclosure provide a method for implanting an implantable blood circulation assist device, including:

[0038] After adjusting the shape of the implantable blood circulation assist device described above, it is placed into the delivery catheter of the implantation device;

[0039] The implantation device is operated to deliver the delivery catheter to the predetermined location within the heart chamber;

[0040] The implantation device is operated to deploy the implantable blood circulation assist device and restore it to its pre-formed shape.

[0041] This device can be permanently implanted in the major blood vessels of the heart and can serve as an alternative to heart transplantation, assisting blood circulation. During installation, the implantable blood circulation assist device can be shaped and placed in the delivery catheter while still outside the body. After implantation into the major blood vessels and heart chambers, it returns to its pre-designed shape. Attached Figure Description

[0042] The above and other objects, features, and advantages of this disclosure will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0043] Figure 1 is a schematic diagram of the principle of an implantable blood circulation assist device according to an embodiment of the present disclosure;

[0044] Figure 2 is a perspective view of an implantable blood circulation assist device provided according to the principle of Figure 1 in an embodiment of the present disclosure;

[0045] Figures 3A and 3B are schematic diagrams of valve designs according to embodiments of the present disclosure;

[0046] Figure 4 is a schematic diagram of an implantable blood circulation assist device according to an embodiment of the present disclosure placed in a heart structure;

[0047] Figure 5 is a flowchart of the control method for the implantable blood circulation assist device provided in the embodiments of this disclosure.

[0048] Figure 6 is a schematic diagram of the implantable blood circulation assist device provided in the present disclosure via catheter implantation in the delivery state.

[0049] Marked in the image:

[0050] Shells 101 and 102 (including a blue membrane structure and a grid-like electroactive polymer)

[0051] Shrink membranes 41, 42

[0052] Valve numbers 103, 104, 105, 13, 14, 15

[0053] Support columns 106, 107, 112, 31, 32

[0054] Circuit box 108, 18

[0055] Battery boxes 112, 12

[0056] Pull ropes 109, 110, 111, 201, 21, 22, 23

[0057] Support rings 113, 114, 115, 116, 1, 2

[0058] Petal 203

[0059] Lobe rings 202, 131, 141, 151

[0060] Connecting rods 204, 205

[0061] Power cord 206

[0062] Fixed hooks 51, 52 Detailed Implementation

[0063] The present disclosure is described below based on embodiments, but it is not limited to these embodiments. In the detailed description of the present disclosure below, certain specific details are described in detail. Those skilled in the art will fully understand the present disclosure even without these details. To avoid obscuring the substance of the present disclosure, well-known methods, processes, and flows are not described in detail. Furthermore, the accompanying drawings are not necessarily drawn to scale. In addition, expressions such as "first," "second," etc., are merely used to illustrate different entities, components, units, modules, etc., and do not describe any distinction in priority or hierarchy among these entities, components, units, modules, etc.

[0064] Figure 1 is a schematic diagram of the implantable blood circulation assist device according to an embodiment of this disclosure. Referring to the figure, in this design, support columns 31 and 32, support rings 1 and 2, and fixing hooks 41 and 42 constitute the skeleton structure of the device, providing support and fixation. Support columns 31 and 32 are the main beams of the skeleton structure, fixing the traction ropes 21 to 23, the valve annulus 131 to 151 of valves 13 to 15, support rings 1 and 2, battery box 12, circuit box 18, and fixing hooks 51 and 51 to them. The support columns 31 and 32 are hollow inside to accommodate the wiring of each component and the circuit box. Support columns 31 and 32 are made of shape memory metal, with the distal end pre-formed into a curved shape. After the implantable blood circulation assist device is adjusted in shape and inserted into the ventricular cavity via a catheter, it returns to its pre-formed shape to adapt to the curvature within the ventricular cavity. Support rings 1 and 2 are foldable plastic structures that can maintain the shape of the internal cavity. Support rings 1 and 2 are connected to support columns 31-32. Fixing hooks 51 and 52 are used to secure the skeletal structure to the ventricular wall, preventing displacement of the device under stress. Sensors and stimulators can be installed at the tips of hooks 51 and 52 to sense changes in myocardial physiological and biochemical parameters, providing a basis for controlling the opening and closing of valves 13 to 15 according to the cardiac cycle program. When the heart stops beating or the heart slows down, pulsed currents can be emitted to pace the heart. Vasodilates 41 and 42 can be fixed to valve annulus 131, 141, and 151. When the valves are closed, the container is sealed; when the valves are open, blood can flow in and out. The traction ropes 21 to 23, valve annulus 131 to 151, and valves 13 to 15 together form the inlet and outlet of the container. When energized, the ropes shorten, pulling the valves open and allowing blood to flow in and out; when de-energized, the ropes lengthen, closing the valves and blocking blood flow, thus controlling unidirectional blood flow.

[0065] The circuit box 18 encapsulates electronic components such as bioelectric amplifiers, filters, analog-to-digital and digital-to-analog converters, analog and digital chips, and radio transmitters and receivers. It processes sensor signals, issues commands, controls the power supply to and from the diastolic membrane container and cords according to the cardiac cycle, and communicates with the external programmer. These components can be integrated onto a solid-state circuit board or printed on a flexible circuit board.

[0066] The battery box contains a 12-pack high-energy solid-state battery, a rechargeable coil, and a rechargeable battery, providing basic power for the artificial heart. The power cord connects to a large-capacity subcutaneous battery / charger, ensuring a reliable power supply for the artificial heart's long-term operation.

[0067] Figure 2 is a perspective view of an implantable blood circulation assist device provided according to the principle of Figure 1 in an embodiment of the present disclosure.

[0068] As shown in the figure, the implantable blood circulation assist device 100 includes a housing 101, a housing 102, a valve 103, a valve 104, a valve 105, and a support and fixation structure (not shown in the figure).

[0069] The outer casings 101 and 102 each form a first cavity and a second cavity that are internally connected and open at both ends. The first cavity and the second cavity each have a first port and a second port. The second port of the first cavity and the first port of the second cavity are both fixedly connected to a valve 104, thereby connecting the first cavity and the second cavity via the valve 104. A valve 103 is disposed at the first port of the first cavity, and a valve 105 is disposed at the second port of the second cavity. Each of the valves 103 to 105 includes a valve annulus and a leaflet. The valve annulus is used to fix the valve to a supporting structure, while the leaflet is movable relative to the valve annulus. When the leaflet is closed relative to the valve annulus, it blocks the cavity; when the leaflet is open relative to the valve annulus, it at least partially opens the cavity.

[0070] The outer shells 101 and 102 are scalable, meaning they can contract and expand under certain conditions. For example, they may contract when energized and expand when de-energized, or contract when de-energized and expand when energized. In some embodiments, the outer shells 101 and 102 are made of shape memory alloys (e.g., nickel-titanium alloys), dielectric elastic materials, or electroactive polymers.

[0071] The support and fixation structure provides support and fixation for the components of the implantable blood circulation assist device 100. In the design of Figure 2, the support and fixation structure includes support columns 106, 107, and 112, and support rings 113, 114, 115, and 116. However, the design of the support and fixation structure can be adjusted according to actual needs, such as increasing or decreasing the number of support rings and / or support columns in the support and fixation structure.

[0072] As shown in Figure 2, the implantable circulatory assist device 100 includes a first part and a second part bounded by a valve 104. The first part includes multiple support columns 106, typically four. The first end of each support column 106 is fixed to a support ring 113, and the second end is fixed to the annulus of the valve 104. In Figure 2, a cavity is formed between the valve 103 and the support ring 113, but this design is not mandatory; the valve 103 and the support ring 113 can also be combined, and similarly, the support ring 114 and the valve 104 can also be combined. The second part includes support columns 107 and multiple support columns 112. The first end of each support column 107 is fixed to the annulus of the valve 104, and the second end is fixed to a support ring 116. In Figure 2, the valve 105 is fixed using support columns 112 and support rings 115 and 116, but this design is not mandatory; for example, support rings 115 and 116 can be combined.

[0073] The battery box 112 is mounted on the support post 106 (e.g., fixed to two adjacent support posts 106) and encapsulates a high-density solid-state battery and an externally rechargeable coil. The circuit box 108 is mounted on the support post 107 and encapsulated using insulating and sealing materials, encapsulating a solid or flexible electronic circuit board and chip. The circuit box 108 is electrically connected to the battery box 112, obtaining power from it. The circuitry and chips inside the circuit box 108 amplify, filter, perform analog-to-digital conversion, and analyze the sensed signals.

[0074] As shown in Figure 2, the implantable blood circulation assist device 100 also includes traction cords 109, 110, and 111, which are respectively fixed to valves 103, 104, and 105 and support columns. The traction cords 109, 110, and 111 are contractile, meaning they can contract and recover under certain conditions. Therefore, the traction cords 109, 110, and 111 are made of shape memory alloys (e.g., nickel-titanium alloys), dielectric elastic materials, or electroactive polymers.

[0075] The implantable blood circulation assist device provided in this embodiment promotes blood flow by contracting and relaxing the outer shell, and by controlling the opening and closing of the leaflets of the three valves relative to the valve annulus, the double container formed by the three valves and the two outer shells opens and closes, thereby promoting unidirectional pulsatile blood flow.

[0076] It should be understood that in the design of the above embodiments, the traction rope serves as a driving device for opening and closing the valve. The valve opens and closes by energizing and de-energizing the traction rope. However, the embodiments of this disclosure are not limited to this. Other driving methods can also be used to open and close the valve. For example, the valve can be opened and closed by magnetic attraction. For example, a permanent magnet sheet can be provided on the leaflet, and a magnetic ring can be provided on the support column or support ring. By alternately energizing and de-energizing the magnetic ring, the opening and closing of the leaflet relative to the valve ring can be controlled by magnetic attraction. In this case, the traction rope can be retained as a limiting component to prevent leaflet dislocation. At this time, the traction rope does not need to have contractility, and therefore can be made of polymer synthetic materials or piezoelectric materials.

[0077] Figures 3A and 3B are schematic diagrams of the valve design according to an embodiment of the present disclosure. In Figure 3A, the valve includes two leaflets 203 and a valve annulus 202, with the leaflets 203 being semi-circular in shape. The leaflets 203, valve annulus 202, and connector 204 can be made of, for example, a rigid polymer material or a metal alloy. Two traction cords 201 are respectively fixed to the two leaflets 203 and the support and fixing structure of the implantable blood circulation assist device 100. When the two traction cords 201 are energized, the two leaflets 203 are pulled open at a certain angle around the connecting rod 205, so that the valve is in the open state. When the two traction cords 201 are de-energized, the two leaflets 203 close, so that the valve is in the closed state, thereby controlling the opening and closing of the valve. In Figure 3B, the valve has only one leaflet 203, with a traction cord 201 provided on both the upper and lower surfaces of the leaflet 203. When the traction rope 201 on the upper surface is energized, the leaflet 203 is pulled open by a certain angle around the connecting rod 205, so that the valve is in the open state. At this time, the traction rope 201 on the lower surface acts as a limiting component to prevent the leaflet from dislodging.

[0078] Figure 4 is a schematic diagram of the implantable blood circulation assist device placed in the heart structure according to an embodiment of this disclosure. As shown in the figure, the heart structure 400 includes a left ventricle 401, a left atrium 402, a pulmonale 403, an aorta 404, a superior vena cava 405, a right atrium 406, and a right ventricle 407. In this embodiment, the first part 460 of the implantable blood circulation assist device is placed at the root of the aorta 404, and the second part 450 is placed inside the left ventricle to assist blood circulation in the left ventricle. However, the first part 460 can also be placed at the root of the left or right pulmonary artery, and the second part 450 can be placed inside the right ventricle to assist blood circulation in the right ventricle. Referring to Figure 2, when preparing the implantable blood circulation assist device, the device can be prefabricated to conform to the shape of the internal cavity as shown in Figure 4, that is, the first part is prefabricated as a column, and the second part is prefabricated as a bent column. After the device is placed in the body, it returns to the prefabricated shape.

[0079] Accordingly, this disclosure also provides a control method for an implantable blood circulation assist device, which includes a first outer shell forming a first cavity, a second outer shell forming a second cavity, and a first valve, a second valve, and a third valve respectively disposed at each port of the first cavity and the second cavity. The first and second outer shells are contractile. As shown in FIG5, the method includes the following steps.

[0080] Step S501: Control the closure of the third valve.

[0081] Step S502: Control the opening of the second valve.

[0082] Step S503: Control the second outer shell to contract so that the volume of the second cavity decreases, squeezing blood into the first container.

[0083] Step S504: Control the second valve to close.

[0084] Step S505: Control the opening of the first valve.

[0085] Step S506: Control the first outer shell to contract so that the volume of the first cavity decreases, squeezing the blood in the first container to flow out in one direction.

[0086] In step S507, the third valve is opened to draw blood into the second cavity. Once the second cavity returns to its normal volume, blood is drawn into the cavity via the third valve.

[0087] Repeat steps S501 to S507, and the blood forms a unidirectional circulation through the double container formed by the cavity and valve.

[0088] For illustrative purposes, the above control method will be explained below with reference to the implantable blood circulation assist device shown in Figure 2. According to the control method, de-energizing and restoring the traction cord 111 closes valve 105. Then, energizing and contracting the traction cord 110 opens valve 104. Energizing and contracting the outer shell 102 reduces the volume of the container formed by valve 105 and outer shell 102, squeezing blood into the container formed by valve 103 and outer shell 101. De-energizing and restoring the traction cord 110 closes valve 104. Energizing and contracting the traction cord 109 opens valve 103. Energizing and contracting the outer shell 101 reduces the volume of the container formed by valve 104 and outer shell 101, squeezing blood out of the container in one direction. Energizing and contracting the traction cord 111 opens valve 105, restoring the volume of the container formed by outer shell 102 and valve 104, allowing blood to be drawn into the container via valve 105. Repeat the above operation, and the blood circulates in a unidirectional manner through the double container formed by the cavity and valve.

[0089] It should be noted that the first, second, and third valves can also be opened and closed using other structures or other means. In this case, the operation of opening and closing the leaflets by pulling the rope in the control method can be modified accordingly. In addition, although the above control method lists the steps in sequence, in reality, some steps can be performed simultaneously, and the order of some steps can be changed.

[0090] Accordingly, this disclosure also provides an implantation method for the above-mentioned implantable blood circulation assist device, including S1 to S3.

[0091] Step S1: After adjusting the shape, the implantable blood circulation assist device is placed into the delivery catheter of the implantable device.

[0092] Step S2: Operate the implantation device to deliver the delivery catheter to the predetermined position inside the heart chamber.

[0093] Step S3: The implantable blood circulation assist device is deployed and restored to its pre-formed shape by the implantation device.

[0094] According to this embodiment, referring to FIG6, the device is adjusted to a certain shape (for example, if the device is in a pre-formed shape, it is stretched and then the elastic components such as valves are flattened) and placed into the catheter 603 of the implantation device. Then, the delivery catheter is delivered to a predetermined position in the heart chamber through the implantation device. Then, the implantation device is operated to unfold the implantable blood circulation assist device and set it to the pre-formed shape.

[0095] As described above, these embodiments of the present disclosure do not exhaustively cover all details, nor do they limit the invention to the specific embodiments described. Clearly, many modifications and variations can be made based on the above description. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present disclosure, thereby enabling those skilled in the art to effectively utilize the present disclosure and its modifications. Therefore, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure also intends to include these modifications and variations.

Claims

1. An implantable blood circulation assisting device, comprising: a first housing forming a first lumen through inside and open at both ends; a second housing forming a second lumen through inside and open at both ends, the first housing and the second housing having a shrinkable and dilatable property; a first valve arranged at a first port of the first lumen; a second valve arranged between a second port of the first lumen and a first port of the second lumen; a third valve arranged at a second port of the second lumen, wherein the first valve to the third valve each comprise a valve ring and a valve leaf movable relative to the valve ring, and the valve leaf blocks the corresponding lumen port when closed relative to the valve ring, and the corresponding lumen port is open when the valve leaf is opened relative to the valve ring; a support and fixation structure for fixing and supporting the first housing, the second housing, the first valve to the third valve; wherein the one-way blood flow is controlled by controlling the sequential opening and closing of the valve leaf relative to the valve ring of the first valve to the third valve, and controlling the overall shrinkage and dilation of the first housing and the second housing.

2. The implantable blood circulation assist device of claim 1, further comprising: a pull rope fixedly connected to the support and fixation structure and the valve leaf, and pulling the valve leaf to achieve the opening and closing of the valve leaf relative to the valve ring.

3. The implantable blood circulation assist device according to claim 1 further includes: a magnetic ring fixedly connected to the support and fixation structure and a permanent magnetic sheet arranged on the valve leaf, the magnetic ring is powered on and off alternately, and the opening and closing of the valve leaf relative to the valve ring is achieved by magnetic force.

4. The implantable blood circulation assist device of claim 3, further comprising: a pull rope as a limiting component for preventing dislocation of the valve leaf.

5. The implantable blood circulation assist device of claim 1, wherein, The first housing and the second housing shrink when powered on and dilate when powered off; or the first housing and the second housing shrink when powered off and dilate when powered on.

6. The implantable blood circulation assist device of claim 1, wherein, The implantable blood circulation assisting device is placed in a delivery catheter after being adjusted in shape, and recovers the pre-prepared shape after being implanted in the body through the delivery catheter.

7. The implantable blood circulation assist device of claim 6, wherein, The implantable blood circulation assisting device comprises a first part and a second part bounded by the second valve, the first part is pre-prepared as a column, and the second part is pre-prepared as a bent column.

8. The implantable blood circulation assist device of claim 1, wherein, The support and fixation structure comprises a plurality of support columns and support rings.

9. The implantable blood circulation assist device according to any one of claims 1 to 8, wherein, The first housing and the second housing are made of shape memory alloy, dielectric elastomer or electroactive polymer.

10. The implantable blood circulation assist device of claim 2, wherein, The pull rope is made of shape memory alloy, dielectric elastomer or electroactive polymer.

11. The implantable blood circulation assist device of claim 1, further comprising: A sensing stimulator arranged on the support and fixation structure.

12. The implantable blood circulation assist device according to claim 1, further comprising: A battery box and a circuit box arranged on the support and fixation structure.

13. The implantable blood circulation assist device of claim 1, wherein, The implantable blood circulation assisting device further comprises a connection line encapsulating each component in the support and fixation structure and an external power supply line arranged on the support structure. 14.A control method of an implantable blood circulation assisting device, the implantable blood circulation assisting device comprising a first housing forming a first lumen, a second housing forming a second lumen, and a first valve, a second valve and a third valve arranged at each port of the first lumen and the second lumen respectively, the first housing and the second housing having a shrinkable and dilatable property, the control method comprising the following steps: controlling the third valve to close; controlling the second valve to open; controlling the second housing to contract to decrease the volume of the second lumen to squeeze blood into the first lumen; controlling the second valve to close; controlling the first valve to open; controlling the first housing to contract to decrease the volume of the first lumen to squeeze blood out of the first container unidirectionally; controlling the third valve to open to draw blood into the second lumen; repeating the above steps to achieve unidirectional circulation of blood via dual-lumen push.

15. The control method according to claim 14, wherein The first valve, the second valve and the third valve comprise a valve ring and valve leaflets movable relative to the valve ring, and the opening and closing of the lumen ports are achieved by controlling the sequential opening and closing of the valve leaflets relative to the valve ring of the first valve to the third valve.

16. The control method of claim 14, further comprising: controlling the first housing and the second housing to move synchronously to increase the volume change of the first lumen and the second lumen.

17. A method of implanting an implantable blood circulation assisting device, comprising: adjusting the shape of the implantable blood circulation assisting device according to any one of claims 1 to 13 and placing it into a delivery catheter of an implantation device; operating the implantation device to deliver the delivery catheter to a predetermined position in a heart chamber; operating the implantation device to deploy the implantable blood circulation assisting device and restore it to the preformed shape.

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