CN103893849B - A kind of full-implantation type axial blood pump of air gaps magnetically-actuated and control method thereof - Google Patents
A kind of full-implantation type axial blood pump of air gaps magnetically-actuated and control method thereof Download PDFInfo
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- CN103893849B CN103893849B CN201410150583.6A CN201410150583A CN103893849B CN 103893849 B CN103893849 B CN 103893849B CN 201410150583 A CN201410150583 A CN 201410150583A CN 103893849 B CN103893849 B CN 103893849B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/20—Type thereof
- A61M60/205—Non-positive displacement blood pumps
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/10—Location thereof with respect to the patient's body
- A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/40—Details relating to driving
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Abstract
The invention discloses a kind of full-implantation type axial blood pump and control method thereof of air gaps magnetically-actuated, between stator and permanent magnet, form air gaps; Stator comprises stator core, stator winding and insulating barrier; Stator core is symmetrically distributed in stator circumference direction by three teeth groove; Stator winding is three groups of coils, and whole distance closed assembly on the stator teeth; Each stator tooth has the relative position skewed slot identical with shape on the surface, and insulating barrier is formed from a resin; Fixed cover is made up of TI4 material.The present invention by optimal design to stator structure, such that total quality is light, volume is little, torque is large, temperature rise is low, and control circuit realizes alternately changing of three groups of coil currents, and N, S pole realizing N, S state on stator tooth and permanent magnet is coupled; System start-up does not need startup winding, and structure is simple, and start-up course designs based on machinery-hydrodynamic characteristics of motor electromagnetic and implantable pump, has and accelerates the feature steady, quick, the suitability is strong.
Description
Technical field
The present invention relates to a kind of blood pump, particularly relate to a kind of full-implantation type axial blood pump of air gaps magnetically-actuated, this also relates to the control method of the full-implantation type axial blood pump of this air gaps magnetically-actuated.
Background technology
According to the report of World Health Organization (WHO), the life of tens of millions of people is seized in the every annual meeting of cardiovascular disease, account for 1/3rd of global Death causes, the first killer of human health, expect 2015, the whole world will have 2,000 ten thousand people to die from cardiovascular disease every year, and heart transplantation is unique effective ways for the treatment of heart disease at final stage.The auxiliary blood pump development of human oriented systemic heart functional rehabilitation is mainly divided into making assisted circulation of ventriculus cordis device (VAD) and total artificial heart (FDA), has 5 sections of VAD and 2 section THA at present in the world and have passed U.S. FDA certification.
The HeartMateII axial-flow pump that Thoratec company of the U.S. produces is with gantry post, and this pump main member comprises rotor, the pair of pivot of inlet and outlet is held and motor.Pump length 81mm, diameter is 43mm, weight 375g, and existing 1000 people are practical at present; The DeBakeyVAD axial-flow pump length of MicroMed company of U.S. exploitation is 76.2mm, and diameter is 30.5mm, and weight is 93g.This pump is used by European Union's certification at present, is applicable to the current just in the certification test process of FDA of child, up to the present, uses more than 440 people.
Liu Zhongmin proposes a kind of pump machine unification implanted micro axial flow blood pump, and (patent No.: 200820054809.2), it is made up of brushless electric machine and axial flow blood pump two major part, and overall dimensions is 29.6x72mm, and blood pump p-m rotor starts as self-starting.
RJ undergraduate course Wei Siji proposes a kind of physiologic control method for an implantable blood pump and the system (patent No.: 03805303.9), changing method is to subscribe speed operation pump, changes reservation speed by detecting patient at diastolic pump flow rate.
Wait the optimization non-constant velocity control method (patent No.: 03121948.9) proposing Computational Fluid Dynamics Analysis of Micro-Axial Blood Pumps in vain quietly, it establishes the membership function of cardiac output, mean speed, myocardial oxygen delivery amount/oxygen consumption, maximum collapse pressure and minimum diastolic pressure, the speed realizing blood pump different conditions regulates.The method is novel, and speed regulates the understanding lacked the mechanical characteristic of pump own, and actual enforcement is complicated.
From above-mentioned research, current artificial heart is in blood pump design and control method research, for the research of blood pump, be applied to clinical artificial heart, great majority all exist volume cannot implant greatly problem in child patient body, only have two for the VAD product of child study, therefore miniaturization is an important development direction of artificial heart; For control method aspect, the control based on human body physiological parameter mainly concentrating on steady state speed is studied, and does not consider the problem of pump startup aspect control method.
Summary of the invention
First technical problem to be solved by this invention is large for implanted blood pump volume, the driving force that principal and subordinate's pole air-gaps causes greatly is not strong and start quick not and stable feature, provides the full-implantation type axial blood pump of the air gaps magnetically-actuated that a kind of structure is simple, volume is little, driving force is strong, temperature rise is little, transmission efficiency is high.
Second technical problem to be solved by this invention is to provide a kind of control method of full-implantation type axial blood pump of this air gaps magnetically-actuated.
In order to solve above-mentioned first technical problem, the full-implantation type axial blood pump of magnetically-actuated provided by the invention, in carrier pipe, coaxial rotation is provided with rotor-support-foundation system, described rotor-support-foundation system is by blood pump rotary blade, impeller before blood pump, impeller and p-m rotor composition after blood pump, also comprise the driving stator be located on described carrier pipe, fixed cover and control system, described driving stator is by silicon steel laminations, winding and insulating barrier composition, the described driving stator number of teeth is 3, circumferentially symmetrical, winding is three i.e. the first coils, second coil and tertiary coil, circumference is equidistantly stacked on three stator tooths respectively, insulating barrier is resin material, driving stator described in described fixed cover realizes is fixed on described carrier pipe axis and circumferencial direction, that is the first coil, the second coil and tertiary coil are connected with described control system power amplification circuit three groups of coil windings.
The axial length of described p-m rotor is 15mm ~ 18mm, and the radial air gap between itself and the internal diameter of described driving stator is 4.5mm ~ 6mm.
Described driving stator is overrided to form by grain-oriented Si steel sheet, and described driving stator outer diameter is 25mm, and facewidth thickness is 2mm, and tooth yoke width is 2mm, and crown angle is 100 ° ~ 112 °, and crown width is 0.25mm.
Described fixed cover is made up of TI4 material, described fixed cover is connected with the first semifixed cover by two semi-rings i.e. the second semifixed cover, described second semifixed cover and first semifixedly puts the fixed leg all having the described radial and axial position of driving stator, described second semifixed cover is connected with semifixed cover connector by pin with the first semifixed cover, is clamped with resin washer between the second semifixed cover and the first semifixed cover.
Described p-m rotor is the NdFeB material composition of the two poles of the earth parallel magnetization, and the angle that magnetizes of often extremely described p-m rotor is 180 °.
Described control system is made up of control circuit, drive circuit, power amplification circuit, current-voltage testing circuit, display circuit, PC telecommunication circuit, flow rate pressure testing circuit and power circuit.
In order to solve second technical problem, the control method realizing the full-implantation type axial blood pump of magnetically-actuated provided by the invention, in carrier pipe, coaxial rotation is provided with rotor-support-foundation system, described rotor-support-foundation system is by blood pump rotary blade, impeller before blood pump, impeller and p-m rotor composition after blood pump, also comprise the driving stator be located on described carrier pipe, fixed cover and control system, described driving stator is by silicon steel laminations, winding and insulating barrier composition, the described driving stator number of teeth is 3, circumferentially symmetrical, winding is three i.e. the first coils, second coil and tertiary coil, equidistantly be stacked on three stator tooths respectively, insulating barrier is resin material, driving stator described in described fixed cover realizes is fixed on described carrier pipe axis and circumferencial direction, that is the first coil, the second coil are connected with the power amplification circuit of tertiary coil with described control system three groups of coil windings, the output pulse of the controller of the control system described in change realizes the change of N, S state of three groups of coil windings namely described the first coil, the second coil and tertiary coil, with the continuous running of the p-m rotor described in realizing that is coupled of N, S pole of described p-m rotor.
The drive circuit of described control system and power amplification circuit realize the rotary actuation of alternately changing of coil windings electric current and p-m rotor; Current-voltage testing circuit realizes the electric current of coil windings and the Real-time Feedback of pressure, completes power calculation by control circuit; Display circuit can show rotating speed, electric current, voltage in real time; Flow rate pressure testing circuit realizes the real-time detection to the pressure-flow of axial-flow pump.
Adopt full-implantation type axial blood pump and the control method thereof of the air gaps magnetically-actuated of technique scheme, drive between the p-m rotor in stator and carrier pipe and form air gaps, blood pump impeller can be made to obtain larger optimal design space; Drive stator to comprise and drive stator, stator winding and skewed stator slot; Drive stator to be symmetrically distributed in by three teeth groove and drive stator circumference direction; Described driving stator winding is three groups of coils, and the equidistant closed assembly of circumference on the stator teeth; Each stator tooth has the relative position skewed slot identical with shape on the surface; Fixed cover is made up of TI4 material, has locating shaft circumference is radial and axial, realizes driving the radial and axial position of stator to fix; P-m rotor is made up of two pole neodymium iron borons of parallel magnetization; Control system is made up of control circuit, drive circuit, power amplification circuit, current-voltage testing circuit, display circuit, PC telecommunication circuit, flow rate pressure testing circuit and power circuit; The electric current that control circuit controls three groups of coils alternately changes, and realizes N, S pole coupled drive of N, S state on stator tooth and p-m rotor; Start simultaneously and do not need to start winding, structure is simple, and system starting process designs based on the machinery-hydrodynamic characteristics of motor electromagnetic torque and pump, and according to system time-rate curve, decision systems speed controlling walks.The present invention is by the reasonable disposition to driving number of stator slots and p-m rotor number of poles, and driving number of stator slots is designed to three grooves, and the minimizing of groove number adds the area of coil-winding, improves the driving moment of system; P-m rotor rotor design is solid construction, can reach and not need to start winding in start-up course, reduce system weight, simplified control circuit; P-m rotor is the NdFeB material composition of the two poles of the earth parallel magnetization, the angle that magnetizes of every pole p-m rotor is 180 °, simplify the difficulty magnetized, the minimizing of number of pole-pairs simultaneously reduces the frequency of control circuit commutation, thus the loss on the control circuitry of system will reduce, and improve the efficiency of system; Stator winding is driven to take concentratred winding mode, the difficulty that the system of simplifying rolls off the production line.
As preferably, described driving stator is overrided to form by grain-oriented Si steel sheet, in order to the overall volume of reduction system, is optimized driving stator structure, under guarantee meets the specified operating condition of blood pump, the driving moment of needs is 11.02Nmm, driving stator outer diameter after optimization is 25mm, and internal diameter is 15mm, and facewidth thickness is 2mm, tooth yoke width is 2mm, crown thickness is 0.25mm, and crown angle is 100-112 °, has the feature of little, the lightweight and compact conformation of volume; System bulk is little, and drive stator and p-m rotor radial air gap length to be 4.5mm-6mm, axial air-gap length is 15-18mm, can meet the requirement to volume and driving force under clinical condition.
In order to make driving stator and coil and human body completely cut off, driving the fixed cover having outside stator and completely cut off with human internal organs, fixed cover is made up of material TI4, and its intensity is high, and density is little, and thermal insulation is good, can reduce blood pump overall weight, the advantage of temperature rise; Drive air gap between stator and overcoat to be vacuum simultaneously, the temperature rise of overcoat shell can be reduced further.
Fixing in order to what realize driving position of stator in axis and radial direction, fixed cover is made up of two semi-rings, has cylindrical protrusion in the inside of semi-ring, can realize driving stator fixing in radial and axial position, two semi-rings are connected by pin and contiguous block, and assemble method is simple and reliable; In order to solve the sealing problem of coupling part between two pump fixed covers, in the present invention, coupling part adopts resin to seal, and the heat conductivility of resin seal and good mechanical property, improve the reliability of implantable pump.
In order to the monitoring of the continuous running and system mode that realize blood pump, control system is made up of control circuit, drive circuit, power amplification circuit, current-voltage testing circuit, display circuit, PC telecommunication circuit, flow rate pressure testing circuit, power circuit; Drive circuit and power amplification circuit can realize the rotary actuation of alternately changing of coil windings electric current and p-m rotor; Current-voltage testing circuit realizes the electric current of coil windings and the Real-time Feedback of pressure, completes power calculation by control circuit; Display circuit can show rotating speed, electric current, voltage in real time; Flow rate pressure testing circuit realizes real-time detection to the pressure-flow of axial-flow pump, and PC telecommunication circuit can realize flow system flow-pressure, current-voltage real-time.In order to realize the quick and stable transition of system accelerator, in the present invention, control step in blood pump start-up course designs according to driving stator electromagnet mechanical kinetics, blood pump hydrodynamics, start-up course is divided into three sections of processes to accelerate, accelerator well solve system fast with stable problem, reduce the vibrations of system, its accelerator speed and time membership function are:
Beneficial effect:
The present invention has the advantage that volume is little, driving force is strong, efficiency is high and start quick and stable, can be applicable to intercorporeal artificial heart's donkey pump.
Increase at principal and subordinate's magnetic pole gap for magnetic driving system, the situation of driving force deficiency, the present invention is by the appropriate design to driving stator, and the reasonable Arrangement of stator coil winding, reaches the object increasing system drive ability.
The present invention, by the optimal design driving stator, ensures meeting the driving of system requirements, achieves the microminiaturization driving stator structure, improves the implantable degree of artificial heart pump.
The present invention, by analyzing pump machinery fluid dynamics, proposes blood pump three sections of curve accelerated methods, has the advantage accelerating quick and stable.
Experiment shows that the present invention is 5mm at principal and subordinate's pole air-gaps, full-size is 26.5*68mm, when drive current is 1A, the maximum (top) speed that blood pump can reach is 9480rpm, differ 120rpm with the 9600rpm of Theoretical Calculation, the time accelerating to maximal rate according to accelerating velocity curve is 22.3s, differs 1.8s with the acceleration time of rate curve, its flow is 4.35L/min, and pressure is 17.96Kpa.
Accompanying drawing explanation
Fig. 1 is that the present invention drives axial blood pump pump housing overall schematic.
Fig. 2 is for driving stator silicon steel laminations and stator winding schematic diagram.
Fig. 3 is for driving stator exterior housing assembling schematic diagram.
Fig. 4 is when electric current is 1.0A, and p-m rotor rotates different driving number of stator slots driving moment in identical winding situation in 180 ° of processes.
Fig. 5 drives the temperature rise value of stator when drive current is 1.0A.
Fig. 6 is control system hardware block diagram.
Fig. 7 is blood pump start-up course accelerating velocity change schematic diagram.
Fig. 8 is blood pump speed change curves figure.
Label declaration: 1. before fixed cover 2. drives iron core 3. blood pump, after impeller 4. blood pump rotary blade 5. p-m rotor 6. bearing 7. blood pump, impeller 8. iron core resin insulating barrier 9,10,12. coil 11. drives stator 13. to connect the semifixed cover connector of pin 14. barrier resin 15,17. fixed cover 16.
Detailed description of the invention
Below with reference to the drawings and specific embodiments, the present invention is described in further details:
See Fig. 1, Fig. 2 and Fig. 3, by bearing 6 coaxial rotation, rotor-support-foundation system 19 is installed in carrier pipe 18, rotor-support-foundation system 19 is by blood pump rotary blade 4, impeller 3 before blood pump, after blood pump, impeller 7 and p-m rotor 5 form, also comprise the driving stator be located on carrier pipe 18, fixed cover 1 and control system, drive stator by silicon steel laminations, winding and insulating barrier composition, stator 11 number of teeth is driven to be 3, circumferentially symmetrical, winding is three i.e. the first coils 9, second coil 10 and tertiary coil 12, circumference is equidistantly stacked on three stator tooths respectively, insulating barrier is resin material, what fixed cover 1 realized driving stator at axis and circumferencial direction is fixed on carrier pipe 18, three groups of coil windings i.e. the first coil 9, second coil 10 is connected with described control system power amplification circuit with tertiary coil 12.
The axial length of p-m rotor 5 is 15mm ~ 18mm, and the radial air gap between itself and the internal diameter driving stator 11 is 4.5mm ~ 6mm.
Drive stator 11 to be formed by radial silicon steel plate stacking, drive stator 11 external diameter to be 25mm, facewidth thickness is 2mm, and tooth yoke width is 2mm, and crown angle is 100 ° ~ 112 °, and crown width is 0.25mm.
Fixed cover 1 is made up of TI4 material, fixed cover 1 is connected with the first semifixed cover 15 by two semi-rings i.e. the second semifixed cover 17, second semifixed cover 17 and the first semifixed cover 15 all there is the fixed leg driving the radial and axial position of stator 11, second semifixed cover 17 is connected with semifixed cover connector 16 by pin 13 with the first semifixed cover 15, is clamped with resin washer 14 between the second semifixed cover 17 and the first semifixed cover 15.
P-m rotor 5 is the NdFeB material composition of the two poles of the earth parallel magnetization, and the angle that magnetizes of often extremely described p-m rotor 5 is 180 °.
Control system is made up of control circuit, drive circuit, power amplification circuit, current-voltage testing circuit, display circuit, PC telecommunication circuit, flow rate pressure testing circuit and power circuit.
Rotor-support-foundation system 19 is arranged in described carrier pipe 18 by bearing 6.
See Fig. 1, Fig. 2 and Fig. 3, in apparatus of the present invention, the three groove stators that blood pump drives device is circumferentially symmetrical, three groups of concentratred winding coils, be arranged on respectively and drive on stator 11 3 teeth, three groups of end turns link together; First by single-chip computer control system, make two teeth groove of three groove stators produce N, S pole respectively, realize the pre-determined bit of rotor-support-foundation system 19; By the pulse frequency of control single chip computer control circuit, N and the S pole realizing three groove stators produce alternately rotates, rotating excitation field is produced in space, by with being coupled of p-m rotor 5, realize system speed to regulate, system boost phase walks according to the control of system mechanics fluid dynamic different conditions procedure regulation single-chip microcomputer, to reach the effect of quick and stable, when reach meet human body physiological state time requirement to flow and pressure time, carry out the output of stability contorting step.
Following explanation is done to the parameter of critical piece: drive stator 11 to be formed by 44 silicon steel plate stackings, the thickness of every sheet stalloy is 0.35mm; Coil wire diameter is 0.27mm, and the umber of turn of every phase coil is 65 circles; Driving stator 11 internal diameter to be p-m rotor external diameter gas length is 5.0mm.
Drive stator 11 external diameter to be 25mm, internal diameter is 15mm, and the facewidth is 2mm, and yoke is wide is 2mm, and crown thickness is 0.25mm, and crown angle is between 100-112 °; P-m rotor 5 external diameter is 5mm.
Embodiment 1:
As shown in Figure 1, in the built-in blood pump rotary blade 4 of p-m rotor 5, p-m rotor 5 and drive air gap between stator 11 and carrier pipe 18 large, be convenient to the optimal design of blood pump runner, drive stator 11 consistent with p-m rotor 5 at axial location, realize its fixing in radial and axial position by fixed cover 1.
As shown in Figure 2, drive stator 11 to be made up of three groove stators, three groups of drive coils and three groups of insulating layer resin, winding is equidistant lap winding, and insulating resin layer can prevent coil from contacting with the direct of stalloy, avoids the broken paint conducting of coil.
As shown in Figure 3, fixed cover 1 is made up of two semi-rings i.e. the second semifixed cover 17 and the first semifixed cover 15, intermediate layer be resin washer 14 for antiseepage, connect the second semifixed cover 17 and the first semifixed cover 15 by semifixed cover connector 16, and be fixed by pin 13.
As shown in Figure 4, drive the Distribution of temperature rise of stator 11 when electric current is 1.0A, overall temperature rise is 0.8 DEG C to the maximum, and overall temperature rise is little, can not damage blood of human body.
As seen in Figure 5, when electric current is 1A, when air gap is 5.0mm, three groove drives structure driving moments are larger than the driving moment of 6 grooves and 9 groove stators.
Fig. 6 is control system hardware composition frame chart, and control system is made up of control circuit, drive circuit, power amplification circuit, current-voltage testing circuit, display circuit, PC telecommunication circuit, flow rate pressure testing circuit, power circuit; This system can realize the control of blood pump and the monitoring of every state and display.
As shown in Figure 7, in blood pump start-up course, be first that rotor is made a reservation in advance, according to speed-time curve, realizing blood pump from rotating speed is the 0 three grades of acceleration accelerating to maximal rate, and steady running state is controlled by invariable power.
As shown in Figure 8, based on driving stator electromagnet mechanics, the acceleration curve of blood pump machinery fluid dynamics has quick, the stable advantage of acceleration.
Claims (6)
1. the full-implantation type axial blood pump of a magnetically-actuated, carrier pipe (18) interior coaxial rotation is provided with rotor-support-foundation system (19), described rotor-support-foundation system (19) is by blood pump rotary blade (4), impeller (3) before blood pump, impeller (7) and p-m rotor (5) composition after blood pump, also comprise the driving stator (11) be located on described carrier pipe (18), fixed cover (1) and control system, described driving stator (11) is by silicon steel laminations, winding and insulating barrier composition, described driving stator (11) number of teeth is 3, circumferentially symmetrical, winding is three i.e. the first coils (9), second coil (10) and tertiary coil (12), circumference is equidistantly stacked on three stator tooths respectively, insulating barrier is resin material, driving stator (11) described in described fixed cover (1) realizes is fixed on described carrier pipe (18) axis and circumferencial direction, i.e. the first coil (9) of three groups of coil windings, second coil (10) is connected with described control system power amplification circuit with tertiary coil (12), it is characterized in that: described fixed cover (1) is made up of TI4 material, described fixed cover (1) is connected with the first semifixed cover (15) by two semi-rings i.e. the second semifixed cover (17), described second semifixed cover (17) and the first semifixed cover (15) all there is the fixed leg of described driving stator (11) radial and axial position, described second semifixed cover (17) is connected with semifixed cover connector (16) by pin (13) with the first semifixed cover (15), resin washer (14) is clamped with between second semifixed cover (17) and the first semifixed cover (15).
2. the full-implantation type axial blood pump of magnetically-actuated according to claim 1, it is characterized in that: the axial length of described p-m rotor (5) is 15mm ~ 18mm, the radial air gap between itself and the internal diameter of described driving stator (11) is 4.5mm ~ 6mm.
3. the full-implantation type axial blood pump of magnetically-actuated according to claim 1 and 2, it is characterized in that: described driving stator (11) is overrided to form by grain-oriented Si steel sheet, described driving stator (11) external diameter is 25mm, facewidth thickness is 2mm, tooth yoke width is 2mm, crown angle is 100 ° ~ 112 °, and crown width is 0.25mm.
4. the full-implantation type axial blood pump of magnetically-actuated according to claim 1 and 2, it is characterized in that: the NdFeB material that described p-m rotor (5) is the two poles of the earth parallel magnetization forms, the angle that magnetizes of often extremely described p-m rotor (5) is 180 °.
5. the full-implantation type axial blood pump of magnetically-actuated according to claim 1 and 2, is characterized in that: described control system is made up of control circuit, drive circuit, power amplification circuit, current-voltage testing circuit, display circuit, PC telecommunication circuit, flow rate pressure testing circuit and power circuit.
6. the full-implantation type axial blood pump of magnetically-actuated according to claim 1 and 2, is characterized in that: described p-m rotor (5) is arranged in described carrier pipe (18) by rotary blade (4).
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| CN107412894A (en) * | 2017-08-08 | 2017-12-01 | 长治市久安人工心脏科技开发有限公司 | A kind of heat sink of implantable cardiac auxiliary blood pump |
| CN111491677B (en) * | 2017-12-05 | 2023-12-01 | 心脏器械股份有限公司 | Blood pump with impeller washing operation |
| CN109350787B (en) * | 2018-09-25 | 2021-04-23 | 中南大学 | Particle image speed measurement system and method for internal flow field of axial-flow artificial heart |
| AU2020301156A1 (en) | 2019-06-28 | 2022-02-24 | Abiomed, Inc. | Intravascular blood pump having multilayer coreless coils |
| CN110743051B (en) * | 2019-12-24 | 2020-05-15 | 丰凯医疗器械（上海）有限公司 | Quick-connection type magnetic transmission device for medical interventional instrument |
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| US6018208A (en) * | 1999-01-26 | 2000-01-25 | Nimbus, Inc. | Articulated motor stator assembly for a pump |
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