CN113546297A - Implanted miniature magnetic suspension axial flow blood pump - Google Patents
Implanted miniature magnetic suspension axial flow blood pump Download PDFInfo
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- CN113546297A CN113546297A CN202110795768.2A CN202110795768A CN113546297A CN 113546297 A CN113546297 A CN 113546297A CN 202110795768 A CN202110795768 A CN 202110795768A CN 113546297 A CN113546297 A CN 113546297A
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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
- A61M60/20—Type thereof
- A61M60/205—Non-positive displacement blood pumps
- A61M60/216—Non-positive displacement blood pumps including a rotating member acting on the blood, e.g. impeller
- A61M60/237—Non-positive displacement blood pumps including a rotating member acting on the blood, e.g. impeller the blood flow through the rotating member having mainly axial components, e.g. axial flow 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
- A61M60/40—Details relating to driving
- A61M60/403—Details relating to driving for non-positive displacement blood pumps
- A61M60/419—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being permanent magnetic, e.g. from a rotating magnetic coupling between driving and driven magnets
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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
- A61M60/403—Details relating to driving for non-positive displacement blood pumps
- A61M60/422—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being electromagnetic, e.g. using canned motor pumps
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- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Mechanical Engineering (AREA)
- Anesthesiology (AREA)
- Cardiology (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- External Artificial Organs (AREA)
Abstract
The invention relates to the technical field of medical instruments, and provides an implanted miniature magnetic suspension axial flow blood pump, which comprises: the rotor assembly is movably arranged in the first shell and comprises a rotor and a permanent magnet group, and the permanent magnet group comprises a plurality of permanent magnets which are annularly arranged on the outer side of the rotor and used for driving the rotor to rotate and axially reciprocate; the two electromagnet groups are oppositely arranged on the first shell and are arranged on two sides of the permanent magnet group; the electromagnet group comprises a plurality of control magnets distributed around the rotor ring; the control magnet comprises a first magnet and a second magnet which are positioned in front of and behind the corresponding permanent magnet along the set circumferential direction and are used for driving the permanent magnet to rotate; the control magnet further comprises a third magnet positioned between the first magnet and the second magnet and used for driving the permanent magnet to axially reciprocate. The invention can improve the efficiency of the blood pump, improve the blood flow, reduce the occurrence of hemolysis, generate pulsating blood flow and reduce the incidence rate of related complications.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an implanted miniature magnetic suspension axial flow blood pump.
Background
Blood-born heart failure (CHF) is a common clinical manifestation of most cardiac disorders with myocardial dysfunction, and CHF is caused by cardiac arrhythmias, hypertensive heart disease, ischemic heart disease, and infectious heart disease. Despite the significant improvement in survival rates of heart failure patients over the past due to advances in medical technology, mortality rates remain high, with about 50% of heart failure patients dying within the next 5 years. Heart transplantation is the first method of treatment for end-stage heart failure, but limited by donor deficiency, and only hundreds of heart transplantation surgeries are performed annually in china. Therefore, the temporary or permanent replacement of heart transplantation with mechanically assisted circulatory devices (artificial hearts) is a very promising direction of development.
The first generation artificial heart is a gas-driven positive displacement blood pump, the blood pumping function is realized by pneumatically controlling the volume of a blood bag, the positive displacement blood pump can simulate the beating state of the heart, but the positive displacement blood pump is large in size, has a serious hemolysis phenomenon, and is easy to form thrombus and cause infection of a connecting part. The second generation artificial heart is a continuous blood pump with a contact bearing and a sealing device, and although the volume of the device is reduced to a great extent, the device is easier to implant, the bearing and the sealing device which are in contact with blood pollute the blood, so the second generation artificial heart is not suitable for long-term implantation; in addition, the current artificial heart mainly adopts a continuous blood pump, and can not simulate the beating state of the heart of a human body, so that certain complications such as organ bleeding and the like can be caused. Therefore, there is a need to improve the performance and applicability of artificial hearts.
Disclosure of Invention
The invention provides an implanted miniature magnetic suspension axial flow blood pump which can improve the efficiency of a blood pump, improve the flow of blood and reduce hemolysis, and can generate pulsating blood flow and reduce the incidence rate of related complications.
The invention provides an implanted miniature magnetic suspension axial flow blood pump, which comprises: a first housing; the rotor assembly is movably arranged in the first shell and comprises a rotor and a permanent magnet group, the permanent magnet group comprises a plurality of permanent magnets which are annularly distributed on the outer side of the rotor, and the permanent magnet group is suitable for driving the rotor to rotate along a set circumferential direction and to reciprocate along a set axial direction; the two electromagnet groups are oppositely arranged on the first shell and are respectively arranged on two sides of the permanent magnet group; the electromagnet group comprises a plurality of control magnets arranged around the rotor ring; the control magnet comprises a first magnet and a second magnet, the first magnet is located in front of the corresponding permanent magnet, the second magnet is located behind the corresponding permanent magnet, and the first magnet and the second magnet are suitable for driving the permanent magnet to rotate along the set circumferential direction; the control magnet further comprises a third magnet located between the first magnet and the second magnet, the third magnet being adapted to drive the permanent magnet to reciprocate along the set axial direction.
According to the implantable micro magnetic suspension axial-flow blood pump provided by the invention, the middle part of the first shell protrudes outwards to form a ring convex part, and the two electromagnet groups are respectively and oppositely arranged on two end surfaces of the ring convex part; the permanent magnet group is located in the annular convex part.
According to the implanted micro magnetic suspension axial flow blood pump provided by the invention, the second shell is covered outside the annular convex part.
According to the implanted miniature magnetic suspension axial flow blood pump provided by the invention, the magnetic poles of the first magnet and the second magnet are opposite.
According to the implanted miniature magnetic suspension axial flow blood pump provided by the invention, the permanent magnets and the third magnets on two sides act in a repulsive force manner.
According to the implantable micro magnetic suspension axial flow blood pump provided by the invention, the axial projections of the electromagnet group and the permanent magnet group are at least partially overlapped.
According to the implanted miniature magnetic suspension axial flow blood pump provided by the invention, the outer diameter of the ring of the electromagnet group is larger than that of the ring of the permanent magnet group.
According to the implanted miniature magnetic suspension axial flow blood pump provided by the invention, the number of the permanent magnets is three, each electromagnet group is provided with nine control magnets, and two sides of each permanent magnet respectively correspond to the three control magnets.
According to the implanted miniature magnetic suspension axial flow blood pump provided by the invention, the rotor is of a helical blade structure.
According to the implanted micro magnetic suspension axial flow blood pump provided by the invention, guide vanes are arranged inside the first shell, and the guide vanes are respectively positioned at two ends of the rotor.
According to the implantable miniature magnetic suspension axial flow blood pump provided by the invention, parts such as a rotating shaft, a bearing and the like are removed, so that the axial diameter size of a rotor in a traditional axial flow pump is reduced, the efficiency of the blood pump is improved, higher blood flow output can be realized at a lower rotating speed, and hemolysis is reduced; the rotation of the rotor is controlled by the first magnet and the second magnet, and the axial reciprocating movement of the rotor is controlled by the third magnet, so that pulsating blood flow is realized.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the related art, the drawings needed to be used in the description of the embodiments or the related art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an implanted micro magnetically suspended axial flow blood pump according to the present invention;
FIG. 2 is a schematic diagram of the configuration of the electromagnet group provided by the present invention;
FIG. 3 is a schematic structural diagram of a permanent magnet assembly provided by the present invention;
FIG. 4 is a schematic diagram of the operation principle of the implanted micro magnetic suspension axial flow blood pump provided by the present invention;
FIG. 5 is a first schematic diagram of the operation of the implanted miniature magnetic suspension axial blood pump to generate pulsating blood flow;
FIG. 6 is a second schematic diagram of the operation of the implanted micro magnetic suspension axial flow blood pump to generate pulsating blood flow;
reference numerals:
1: a first housing; 11: a ring protrusion; 2: a second housing; 3: a guide vane;
4: an electromagnet group; 41: a first magnet; 42: a third magnet; 43: a second magnet;
5: a permanent magnet group; 51: a first permanent magnet; 52: a second permanent magnet;
53: a third permanent magnet; 6: and a rotor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "front", "back", "inside", "outside", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only used for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
According to an embodiment of the present invention, as shown in fig. 1 to fig. 3, the implantable micro magnetic suspension axial blood pump provided by the present invention mainly includes: a first housing 1, a rotor assembly and two electromagnet groups 4. Wherein the first housing 1 serves as a pump housing; the rotor assembly is movably arranged inside the first shell 1, the rotor assembly comprises a rotor 6 and a permanent magnet group 5, the permanent magnet group 5 comprises a plurality of permanent magnets annularly arranged on the outer side of the rotor 6, in this example, the permanent magnets comprise a first permanent magnet 51, a second permanent magnet 52 and a third permanent magnet 53, and the permanent magnet group 5 is suitable for driving the rotor 6 to rotate along a set circumferential direction and to reciprocate along a set axial direction; the two electromagnet groups 4 are oppositely arranged on the first shell 1, and the two electromagnet groups 4 are respectively arranged on two sides of the permanent magnet group 5; the electromagnet group 4 comprises a plurality of control magnets arranged annularly around the rotor 6; along the set circumferential direction, the control magnet comprises a first magnet 41 positioned in front of the corresponding permanent magnet and a second magnet 43 positioned behind the corresponding permanent magnet, and the first magnet 41 and the second magnet 43 are suitable for driving the permanent magnets to rotate along the set circumferential direction; the control magnet further comprises a third magnet 42 located between the first magnet 41 and the second magnet 43, the third magnet 42 being adapted to drive the permanent magnet to reciprocate along the set axial direction. It will be appreciated that the present rotor assembly has the above arrangement of the electromagnet groups 4 during successive revolutions, each time it rotates to a control position.
Therefore, the embodiment of the invention reduces the size of the shaft diameter of the rotor 6 in the traditional axial-flow pump and improves the efficiency of the blood pump by removing parts such as the rotating shaft, the bearing and the like, and compared with the prior art, the embodiment of the invention improves the contact area between the surface of the rotor 6 and blood, can realize higher blood flow output at lower rotating speed and reduce hemolysis; the rotation of the rotor 6 is controlled by the first magnet 41 and the second magnet 43, and the axial reciprocating movement of the rotor 6 is controlled by the third magnet 42, so that pulsating blood flow is realized, compared with the conventional common rotating speed control method, the damage to blood caused by the sudden change of the rotating speed of the rotor 6 is reduced, and meanwhile, the flow field in the pump is continuously changed and the blood is continuously updated due to the continuous reciprocating movement of the rotor 6, so that the formation of a region with slow blood flow is avoided, and the generation of thrombus is effectively prevented.
According to the embodiment of the invention, the middle part of the first shell 1 protrudes outwards to form a ring-shaped convex part 11, and the two electromagnet groups 4 are respectively and oppositely arranged on two end faces of the ring-shaped convex part 11; the permanent magnet groups 5 are located within the ring-shaped protrusion 11. According to the invention, the annular convex part 11 is arranged, on one hand, the annular convex part 11 is used as an installation carrier of the electromagnet group 4, so that the electromagnet group 4 is prevented from contacting with blood in the first shell 1, and the safety is improved; on the other hand, the annular convex part 11 can limit the axial reciprocating movement of the permanent magnet group 5, and the stability is improved.
According to the embodiment of the invention, the second housing 2 is covered outside the annular convex part 11 and used for protecting the electromagnet group 4 when being implanted, so that the safety is improved.
According to an embodiment of the present invention, the first housing 1 and the second housing 2 are cylindrical.
According to an embodiment of the present invention, the first magnet 41 and the second magnet 43 have opposite poles. Specifically, when the rotor 6 rotates to the control position, the magnetic field directions of the first magnet 41 and the second magnet 43 are controlled to be opposite to each other, at this time, the second magnet 43 generates a repulsive force to the rear end of the permanent magnet in the set circumferential direction, the first magnet 41 generates an attractive force to the front end of the permanent magnet in the set circumferential direction, and a resultant force along the set circumferential direction is formed to the permanent magnet to drive the rotor 6 to rotate, so that blood is driven to flow. And, the rotation direction of the rotor assembly is controlled by controlling the magnetic field direction of the first and second magnets 41 and 43, and the rotation speed of the rotor assembly is controlled by controlling the current magnitude of the first and second magnets 41 and 43. It will be appreciated that the present invention may also assist in producing pulsatile blood flow through the control of rotational speed.
According to the embodiment of the invention, the permanent magnet group 5 and the third magnets 42 on the two sides generate a repulsive force together, so that the relative position of the rotor assembly is fixed and suspended, and the stability is ensured.
According to the embodiment of the invention, the axial projections of the electromagnet group 4 and the permanent magnet group 5 are at least partially overlapped, so that the mutual acting force is generated conveniently, and the stability is improved.
According to the embodiment of the invention, the outer diameter of the circular ring of the electromagnet group 4 is larger than that of the permanent magnet group 5, so that the rotor 6 is effectively prevented from generating eccentricity in the rotating process.
In one embodiment, the permanent magnet group 5 is provided with three permanent magnets, a first permanent magnet 51, a second permanent magnet 52 and a third permanent magnet 53, and each electromagnet group 4 is provided with nine control magnets, and two sides of each permanent magnet correspond to the three control magnets, respectively, i.e., each permanent magnet is controlled by the first magnet 41, the second magnet 43 and the third magnet 42 when rotated to the control position. In some examples, the permanent magnets included in the permanent magnet group 5 and the control magnets included in the electromagnet group 4 may be in other numbers.
According to an embodiment of the invention, the rotor 6 is of helical blade construction.
According to the embodiment of the invention, the guide vanes 3 are arranged inside the first shell 1, and the guide vanes 3 are respectively positioned at two ends of the rotor 6; and the both ends of first casing 1 are equipped with blood entry and blood export respectively, and the stator 3 sets up respectively in blood entry and blood export department, the water conservancy diversion of being convenient for.
The first permanent magnet 51 is taken as an example to describe the working principle of the implantable micro magnetically suspended axial flow blood pump provided by the present invention, and the working principle mainly includes that the rotor assembly rotates along the set circumferential direction and reciprocates along the set axial direction.
The rotor assembly rotates along the set circumferential direction: as shown in fig. 4, when the first permanent magnet 51 is located at the current control position (r), the magnetic poles of the first magnet 41 and the second magnet 43 are opposite, the first magnet 41 attracts the first permanent magnet 51 to rotate forward, and the second magnet 43 pushes the first permanent magnet 51 to rotate forward, so that the first permanent magnet 51 rotates in the set circumferential direction; the position stability of the first permanent magnet 51 is ensured through the repulsive force action of the third magnet 42 and the first permanent magnet 51;
when the first permanent magnet 51 rotates to the next control position (II), the magnetic poles of the first magnet 41 positioned in the front of the control position (I) and the second magnet 43 adjacent to the first magnet are respectively controlled to be reversed, at this time, the third magnet 42 positioned in the control position (I) becomes the second magnet 43 of the control position (II), the first magnet 41 becomes the third magnet 42 of the control position (II), and the second magnet 43 adjacent to the first magnet 41 becomes the first magnet 41 of the control position (II);
when the first permanent magnet 51 rotates to the next control position (c), the magnetic poles of the first magnet 41 positioned in the front of the control position (c) and the second magnet 43 adjacent to the first magnet are respectively controlled to be reversed, at this time, the third magnet 42 positioned in the control position (c) becomes the second magnet 43 in the control position (c), the first magnet 41 becomes the third magnet 42 in the control position (c), and the second magnet 43 adjacent to the first magnet 41 becomes the first magnet 41 in the control position (c);
and the rest is repeated in sequence, and finally, the operation is circulated to the control position I.
The rotor assembly reciprocates along a set axial direction, i.e., pulsating blood flow: as shown in fig. 5 and 6, the control current of the third magnets 42 located at both sides of the permanent magnet group 5 is periodically increased and decreased to periodically change the axial position of the rotor assembly, thereby realizing the change of the blood flow pattern. The specific implementation mode is as follows:
first, as shown in fig. 5, the control current of the first side (left side) third magnet 42 is decreased, and the control current of the second side (right side) third magnet 42 is increased, so that the repulsive force of the second side third magnet 42 to the permanent magnet group 5 is greater than the repulsive force of the first side third magnet 42 to the permanent magnet group 5, and therefore, the rotor assembly moves toward the first side electromagnet group 4, thereby achieving a new force balance state.
Next, as shown in fig. 6, the control current on the first side (left side) third magnet 42 is increased, and the control current on the second side (right side) third magnet 42 is decreased, so that the repulsive force of the first side third magnet 42 to the permanent magnet group 5 is greater than the repulsive force of the second side third magnet 42 to the permanent magnet group 5, and therefore, the rotor assembly moves to the second side electromagnet group 4, and a new force balance state is achieved. The two steps are repeated continuously, so that the axial reciprocating motion of the permanent magnet group 5 and the rotor 6 can be realized, and pulsating blood flow is generated.
In the present embodiment, the permanent magnet set 5 generates periodic displacement by the periodic control current variation, and drives the rotor 6 to perform periodic reciprocating motion in the axial direction, so as to generate pulsating blood flow. Meanwhile, since the controllability of the electromagnet group 4 is strong, pulsating blood flow of different frequencies and different amplitudes can be realized by current control of the third magnets 42 at both sides.
Moreover, because the rotor 6 moves back and forth continuously, the flow field in the pump changes continuously, blood is updated continuously, the formation of a region with slow blood flow is avoided, and the generation of thrombus is effectively prevented.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An implanted miniature magnetic suspension axial flow blood pump, which is characterized by comprising:
a first housing;
the rotor assembly is movably arranged in the first shell and comprises a rotor and a permanent magnet group, the permanent magnet group comprises a plurality of permanent magnets which are annularly distributed on the outer side of the rotor, and the permanent magnet group is suitable for driving the rotor to rotate along a set circumferential direction and to reciprocate along a set axial direction;
the two electromagnet groups are oppositely arranged on the first shell and are respectively arranged on two sides of the permanent magnet group;
the electromagnet group comprises a plurality of control magnets arranged around the rotor ring; the control magnet comprises a first magnet and a second magnet, the first magnet is located in front of the corresponding permanent magnet, the second magnet is located behind the corresponding permanent magnet, and the first magnet and the second magnet are suitable for driving the permanent magnet to rotate along the set circumferential direction; the control magnet further comprises a third magnet located between the first magnet and the second magnet, the third magnet being adapted to drive the permanent magnet to reciprocate along the set axial direction.
2. The implantable miniature magnetic suspension axial-flow blood pump according to claim 1, wherein the middle part of the first housing is protruded outwards to form a ring protrusion, and the two electromagnet groups are respectively and oppositely arranged on two end faces of the ring protrusion; the permanent magnet group is located in the annular convex part.
3. The implantable micro magnetic levitation axial blood pump as claimed in claim 2, wherein the outer portion of the annular protrusion is covered with a second shell.
4. The implantable micro magnetically levitated axial blood pump of claim 1, wherein the first magnet and the second magnet have opposite poles.
5. The implantable miniature magnetic suspension axial flow blood pump according to claim 1, wherein the permanent magnet and the third magnets on both sides act as a repulsive force.
6. The implantable micro magnetically levitated axial blood pump according to claim 1, wherein projections of the electromagnet groups and the permanent magnet groups in an axial direction are at least partially coincident.
7. The implantable micro magnetically levitated axial flow blood pump of claim 1, wherein an outer diameter of a ring of the electromagnet group is greater than an outer diameter of a ring of the permanent magnet group.
8. The implantable miniature magnetic levitation axial blood pump as claimed in claim 1, wherein there are three permanent magnets and nine control magnets are provided for each electromagnet group, and two sides of each permanent magnet correspond to three control magnets respectively.
9. The implantable micro magnetic levitation axial blood pump as claimed in claim 1, wherein the rotor is a helical blade structure.
10. The implantable miniature magnetic suspension axial-flow blood pump according to claim 1, wherein guide vanes are arranged inside the first shell, and the guide vanes are respectively positioned at two ends of the rotor.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114392476A (en) * | 2022-01-17 | 2022-04-26 | 上海炫脉医疗科技有限公司 | High-temperature superconducting magnetic suspension axial-flow type blood pump |
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| US20020102169A1 (en) * | 1996-02-20 | 2002-08-01 | Kriton Medical, Inc. | Sealless rotary blood pump |
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