CN103191476A - Single-fulcrum magnetomotive centrifugal blood pump - Google Patents
Single-fulcrum magnetomotive centrifugal blood pump Download PDFInfo
- Publication number
- CN103191476A CN103191476A CN2012102740478A CN201210274047A CN103191476A CN 103191476 A CN103191476 A CN 103191476A CN 2012102740478 A CN2012102740478 A CN 2012102740478A CN 201210274047 A CN201210274047 A CN 201210274047A CN 103191476 A CN103191476 A CN 103191476A
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- blood pump
- boss
- single fulcrum
- centrifugal blood
- impeller
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
- F04D29/047—Bearings hydrostatic; hydrodynamic
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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
- A61M60/10—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
-
- 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
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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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- 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
- A61M60/80—Constructional details other than related to driving
- A61M60/802—Constructional details other than related to driving of non-positive displacement blood pumps
- A61M60/818—Bearings
- A61M60/824—Hydrodynamic or fluid film bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor 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
- A61M60/126—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel
- A61M60/148—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
Abstract
The invention provides a single-fulcrum magnetomotive centrifugal blood pump, which is characterized in that a pump body and a driving device are arranged in a blood pump, wherein the pump body comprises a top cap, a base, an impeller and outer magnetic steel; at least three layers of bosses are arranged on the base; a groove is arranged in the boss at the top end; a rolling ball is placed in the groove; a patchhole is arranged at the center of the bottom of the base; vanes and an annular joint are arranged on the impeller; connecting rods are arranged in the inner circle of the annular joint and gathered around the center of the inner circle of the annular joint; a circular arc central groove is formed at the bottom of the gathering position of connecting rod, and is matched with the rolling ball in the groove in the boss to form a single-fulcrum bearing; the outer magnetic steel is arranged inside the vanes; the driving device comprises a transmission shaft and a driving motor provided with a motor rotor; the motor rotor is sleeved with the transmission shaft; the transmission shaft is inserted into the patchhole; and inner magnetic steel is arranged inside the transmission shaft. The blood pump provided by the invention has the advantages that the incidence rate of thrombus and hemolysis can be effectively reduced as the pre-filling quantity is less; the structure is simple and stable; the mounting is convenient; and the cost is low.
Description
Technical field
The present invention relates to technical field of medical instruments, specifically, is a kind of single fulcrum magnetomotive centrifugal blood pump.
Background technology
Cardiovascular and cerebrovascular disease accounts for 46% mortality rate in the first place that developed country occupies the human cause of death already, and U.S.'s statistics shows that annual operation on heart quantity is about 350,000 examples.Present domestic annual open heart operations quantity is about 100,000, and along with improving constantly of rapid development of economy and medical level, domestic cardiac operation quantity will have an ever-increasing process.Show that according to statistics operation on heart has part patient (0.6-2%) impaired serious because of cardiac function later on, even still can not keep the body minimum requirements under the medicine support.This part patient has to adopt assist circulation equipment temporarily to support cardiac function, earns a bare living, and waits for that cardiac function recovers.Wherein the part patient also needs to use long-term circulation auxiliary facilities to substitute cardiac function.In addition, the most effectual way for the treatment of chronic irreversible heart failure is heart transplantation, but the deficiency of donor's heart limits the heart transplantation therapy in clinical widespread usage, and new therapys such as genetic engineering, cell engineering still can not be carried out on a large scale in visible future.Therefore, the ventricle ancillary technique also becomes unique selection many times.
Blood pump (having another name called heart pump) is the core of heart assistance circulating device, in recent years, is the emphasis of developed country's assist circulation research always, and has obtained certain progress.
First generation blood pump the earliest is the pulsate pump of copying the heart development, and this type of blood pump adopts pneumatic or electronic extruding pump chamber, puts out blood by the change of pump chamber.Second filial generation Continuous Flow impeller blood is risen the eighties in last century early stage, and the blade pass of this type of blood pump is crossed mechanical bearing and is installed on the blood pump rotor, thereby the rotation of rotor banding moving vane promotes blood along the hand of helix propulsion.Third generation blood pump is characteristics with the suspension technology, and therefore the blood pump of all employing magnetic suspension and/or liquid suspension technology research and development all is called third generation blood pump.
Third generation blood pump generally has and suspends and drive two systems: suspension system makes impeller suspended, the direct permanent magnetismization of impeller or be embedded in permanent magnet at moulding impeller.Insert permanent magnetism or solenoid in the stator of blood pump or the pump case, interact by axially reaching radial magnetic field between magnetized impeller and stator or the pump case, make impeller suspended in the middle of pump case; The rotation of drive systems impeller.Insert another group solenoid in stator or pump case, the variation by solenoid current produces magnetic force and promotes magnetized impeller rotation.
Third generation blood pump has three developmental stage: first stage is the outer motor indirect drives impeller stage that suspends and separate with drive system.The suspension technology of blood pump is comparatively simple, and suspension system is separated with drive system, blood pump adopt outer motor actuation techniques, impeller be by one independently outer motor drive; Outer motor is by the mechanical bearing magnetized out rotor that is rotatably connected, and out rotor is by impeller rotation in the magnetization of another suspension of magnetically-actuated; Interior impeller is main drive part, and its rotation can promote blood flow.Second stage is the direct drives impeller of the motor stage that suspends and separate with drive system, adopts the direct drives impeller suspension technology of blood pump motor.Suspension system is also separated with drive system, but motor has been cancelled out rotor, and directly as the rotor of motor, the motor directly variation by magnetic force drives the wheel rotation that suspends and promotes blood flow with suspended impeller.Pump still needs the independently magnetic suspension system blood pump impeller that suspends of another one.Phase III is to suspend and the drive system fusing stage, the suspension and the drive system that are blood pump merge, the blood pump design will suspend and form stator with the solenoid fusion of drive system, come the double function that drives with suspended impeller of doing with a stator, therefore the design of pump is more succinct, and it represents blood pump is VentrAssist.
Third generation blood pump majority is designed to centrifugal pump, minority is axial-flow pump, representational third generation blood pump has several, for example: (1) Berlin Heart Incor pump: be that blood pump is made by titanium alloy by the magnetic levitation axial flow pump of Berlin Heart company research and development, the impeller of unique motion is designed to Archimedian screw in the pump housing, impeller is suspended in the pump case by axially reaching radial magnetic force, by the variation of electromagnetic field, drive the impeller shaft of suspension to rotation, flow forward thereby promote blood; (2) HeartWare pump: the impeller of pump suspends the pump leaf by magnetic suspension and liquid suspension technology, and total stator of pump is formed by 2 separate coil combination, and 2 coils can be worked simultaneously in the running, also can work independently; (3) VentrAssist pump: all there is pyrocarbon coating at the position that pump contacts with blood, can reduce incidence of thrombus, but this pump inflow road is longer, therefore, still needs to make micro pockets after the implantation behind posterior rectus sheath or rectus abdominis m. and places the pump housing; (4) NovacorVAD pump: have special inflow system, the parallel design with the pump housing of the flow ipe of this pump forms flat pattern outward.
Thrombosis is by hematoblastic gathering and formation of deposits, in the blood pump general send out in less be subjected to that blood flow washes away block the district and with the low regime of blood contacting surface.Haemolysis refers to that high speed that turbulent motion or mechanical movement produce or high pressure have destroyed the erythrocyte in the blood, causes hemoglobin to be distributed in the blood plasma, mainly by irregular flow and the turbulent motion district in shearing force cause.Haemolysis and thrombosis phenomenon are huge to patient's harm, in clinical practice, the thrombosis that the heart assistance circulating device causes and haemolysis can cause the patient physiological disorder, and then cause the patient in art and the complication of postoperative, even jeopardize patient's life, especially the patient's who supports for the long-term assist circulation of needs influence is bigger.As seen, the thrombosis of minimizing heart pump and haemolysis is problem demanding prompt solution in the assist circulation system research and development.
Third generation blood pump than first and second generation blood pump, owing to use magnetic levitation technology, impeller suspended is in the blood pump body, not friction and extruding, haemolysis obviously reduces, and the incidence rate of thrombosis significantly reduces, and does not have the bearing wear problem simultaneously, improved the durability that blood pump uses, be more suitable in long-term circulation auxiliary.
And the structure of present third generation blood pump is also comparatively complicated, and is big with blood contacting surface, is easy to generate the stagnant area of blood, causes thrombosis.In addition, blood pump belongs to disposable product, should be simple in structure, and with low cost; Also should reduce the priming volume of blood pump as far as possible; At baby and neonatal patient, also should possess the advantage of low priming volume.And at present more simple about structure, can reduce effectively that incidence of thrombus, priming volume are little, low discharge, blood pump that cost is low yet there are no report.
Summary of the invention
The objective of the invention is at deficiency of the prior art, a kind of single fulcrum magnetomotive centrifugal blood pump is provided.
For achieving the above object, the technical scheme taked of the present invention is:
A kind of single fulcrum magnetomotive centrifugal blood pump, be provided with the pump housing and driving device, the described pump housing comprises top cover, base, impeller and outer steel, described base is provided with at least three layers of boss, the boss on top is provided with groove, lay ball in the described groove, the bottom center of described base is provided with patchhole; Described impeller is provided with blade and is connected with ring-type, the inner ring that described ring-type connects is provided with connecting rod, described connecting rod compiles in central authorities, and the drop-center of circular arc is formed on the bottom, and described drop-center cooperates the single fulcrum roller of formation with ball in the boss groove; Described outer steel is located at blade interior; Described driving device comprises power transmission shaft and is provided with the drive motors of rotor, described driving sleeve and is inserted in inserting in the hole of base on rotor, the inside of power transmission shaft is provided with interior magnet steel, magnet steel is identical with outer steel quantity over against laying in described, and adjacent pole is staggered;
Described outer steel is cuboid or cylinder;
Magnet steel is cuboid or cylinder in described;
Described base is provided with three layers of boss;
Described ball is sphere or hemispherical;
Described ball is made by pottery;
Described blade is prismatic blade or crooked backward along direction of flow of blood;
The quantity of described blade is four or six;
Described drive motors outside is provided with pump housing placing device, and described pump housing placing device is a concave station.
The invention has the advantages that:
1, adopt single fulcrum roller as turning cylinder, this ball bearing and blood contacting surface amass ten/and little, reduce the contact surface of turning cylinder and blood, and then reduced the blood resides district, can effectively reduce incidence of thrombus;
2, described outer steel and blood runner are in the same cavity, by outer steel being placed in the blade, interior magnet steel being placed in the power transmission shaft, the magnet steel that has solved common cavity is put problem, simple in structure with seasonal blood pump of the present invention, the advantage that possesses low priming volume, be applicable to children's's congenital heart disease operation back ventricle assist circulation, also can in operation, extracorporeal circulation use simultaneously;
3, described ball is hemispherical, makes single fulcrum roller structure more firm;
4, described base is provided with boss, can effectively reduce priming volume;
5, described base is provided with patchhole, makes things convenient for laying of power transmission shaft;
6, described impeller to be shaped as the front end edge direction of flow of blood crooked backward, comply with direction of flow of blood, can effectively reduce erythrocytic shearing force in the blood, reduce the occurrence probability of haemolysis;
7, volume is little, is convenient to surgery and implants, and can significantly reduce cost simultaneously.
Description of drawings
Accompanying drawing 1 is single fulcrum magnetomotive centrifugal blood pump installation diagram of the present invention.
Accompanying drawing 2 is single fulcrum magnetomotive centrifugal blood pump pump housing installation diagrams of the present invention.
Accompanying drawing 3 is vertical views of Fig. 2.
Accompanying drawing 4 is the second-class survey axonometric drawings of the single fulcrum magnetomotive centrifugal blood pump impeller of the present invention.
Accompanying drawing 5 is upward views of Fig. 4.
Accompanying drawing 6 is the second-class survey axonometric drawings of the single fulcrum magnetomotive centrifugal blood pump driving device of the present invention.
Accompanying drawing 7 is the second-class survey axonometric drawings of the another kind of impeller of the single fulcrum magnetomotive of the present invention centrifugal blood pump.
Accompanying drawing 8 is the second-class survey axonometric drawings of the another kind of driving device of the single fulcrum magnetomotive of the present invention centrifugal blood pump.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment provided by the invention is elaborated.
The Reference numeral and the ingredient that relate in the accompanying drawing are as follows:
1. top cover 101. entrances
102. export 103. upper walls
104. outer wall 2. bases
201. first boss, 2011. first boss tops
2012. the first boss main body, 202. second boss
203. the 3rd boss 204. grooves
205. ball 206. patchholes
3. impeller 301. blades
302. ring-type connects 303. connecting rods
304. drop-center 305. outer steels
3051. outer steel end face 306. junction surfaces
4. drive motors 401. rotors
5. magnet steel in the power transmission shaft 501.
6. pump housing placing device
Embodiment 1
Please refer to Fig. 1, Fig. 1 is single fulcrum magnetomotive centrifugal blood pump installation diagram of the present invention.Described single fulcrum magnetomotive centrifugal blood pump is provided with the pump housing and driving device, and the described pump housing comprises top cover 1, base 2, impeller 3 and outer steel 305, and described driving device comprises drive motors 4, power transmission shaft 5 and interior magnet steel 501.
Please refer to Fig. 2, Fig. 2 is single fulcrum magnetomotive centrifugal blood pump pump housing installation diagram of the present invention.Described top cover 1 is provided with entrance 101, outlet 102, upper wall 103 and outer wall 104.Described outer wall 104 is cylindrical, and the bottom is provided with female thread (not shown); Described upper wall 103 is taper, is located at the top of outer wall 104; Described entrance 101 is positioned at the center on upper wall 103 tops; Described outlet 102 is rectangular with entrance 101, and from Fig. 3 (Fig. 3 is the vertical view of Fig. 2) as seen, the described outlet 102 longshore currents tangential direction of engaging in this profession places outer wall 104 surfaces.
Please refer to Fig. 2 again, described base 2 comprises first boss 201, second boss 202 and the 3rd boss 203.The first boss top 2011 of described first boss 201 is taper, the center is provided with groove 204, lay ball 205 in the described groove 204, described ball 205 is hemispherical, and the first boss main body 2012 of described first boss 201 is hollow circular cylinder; Described second boss 202 also is hollow circular cylinder, its outer wall is provided with external screw thread (not shown), the top of second boss 202 links to each other with first boss 201, and the bottom links to each other with the top of the 3rd boss 203, and the diameter of second boss 202 is greater than the diameter of the first boss main body 2012; Described the 3rd boss 203 also is hollow circular cylinder, and its diameter is greater than second boss, 202 diameters, and the while is greater than the diameter of outer wall 104; The inside of the hollow of the described first boss main body 2012, second boss 202 and the 3rd boss 203 forms patchhole 206, and namely the bottom of base 2 is provided with patchhole 206.
Please refer to Fig. 4, Fig. 4 is the second-class survey axonometric drawing of the single fulcrum magnetomotive centrifugal blood pump impeller of the present invention.Described impeller 3 is provided with ring-type and connects 302, it is annular ring that described ring-type connects 302, its inner ring is provided with three connecting rods 303, described three connecting rods 303 compile formation junction surface 306 in the central authorities of impeller 3, described junction surface 306 is annular ring, its centre bottom is drop-center 304, and described drop-center 304 is circular arc.The lower end of described ring-type connection 302 is provided with four blades 301, described four blade 301 arrays discharging, and it is as a whole to connect 302 connections by ring-type, forms partly dish-shaped runner, and the front end edge direction of flow of blood of blade 3 is crooked backward.The inside, rear end of described blade 301 is provided with outer steel 305, and described outer steel 305 is laminated structure.Please refer to Fig. 5, Fig. 5 is the upward view of Fig. 4, and described outer steel end face 3051 is rectangle, and namely described outer steel 305 is cuboid.
Please refer to Fig. 1 again, described driving device comprises drive motors 4 and power transmission shaft 5, and described drive motors 4 outsides are provided with pump housing placing device 6, and described pump housing placing device 6 is a concave station, and its internal diameter equates with the external diameter of the 3rd boss 203 of base 2; The upper end of described drive motors 4 is rotor 401.Please refer to Fig. 6, Fig. 6 is the second-class survey axonometric drawing of the single fulcrum magnetomotive centrifugal blood pump driving device of the present invention.Described power transmission shaft 5 outer being enclosed within on the rotor 401, magnet steel 501 in laying in the power transmission shaft 5, described interior magnet steel 501 is the round sheet magnet steel, and is identical with outer steel 305 quantity.
Please refer to Fig. 1, when single fulcrum magnetomotive centrifugal blood pump assembling of the present invention is finished, the female thread (not shown) of described outer wall 104 bottoms cooperates with the external screw thread (not shown) of second boss 202, make top cover 1 and base 2 form internal cavity, described impeller 3 is arranged in this internal cavity, and be assemblied on first boss 201, the ball 205 in described drop-center 304 and the groove 204 matches, and constitutes single fulcrum roller; The central axes of the central axis of described impeller 3 and first boss 201, the distance that the rear end of each blade 301 is identical with first boss, 201 intervals, and parallel with the tangential direction of first boss 201; The outer steel end face 3051 of described outer steel 305 parallels with the central axis of first boss 201, and radially vertical with first boss 201, and intersection point is positioned at the center of outer steel end face 3051; Magnet steel 501 is identical with outer steel 305 quantity and over against laying in described, and adjacent pole is staggered.Described power transmission shaft 5 is inserted in the patchhole 206 of base 2, and the diameter of power transmission shaft 5 is less than the diameter of patchhole 206, and described pump housing erecting device 6 blocks the 3rd boss 203, and the whole pump housing is fixed.
Single fulcrum magnetomotive centrifugal blood pump of present embodiment is substantially the same manner as Example 1, difference only is: please refer to Fig. 7, Fig. 7 is the second-class survey axonometric drawing of the another kind of impeller of the single fulcrum magnetomotive of the present invention centrifugal blood pump, described impeller 3 is provided with six blades 301, and described blade 301 is prismatic blade.
Single fulcrum magnetomotive centrifugal blood pump of present embodiment is substantially the same manner as Example 1, difference only is: please refer to Fig. 8, Fig. 8 is the second-class survey axonometric drawing of the another kind of driving device of the single fulcrum magnetomotive of the present invention centrifugal blood pump, and described interior magnet steel 501 is circle lamellar magnet steel.Corresponding, described outer steel 305(is not shown) outer steel end face 3051 be circle, namely described outer steel 305 is the lamellar cylinder.
At above-described embodiment 1-3, need to prove:
The drop-center 304 of described circular arc matches with hemispherical ball 205 in the groove 204 of base 2, constitute single fulcrum roller, described hemispherical ball 205 plays axial support impeller 3 and the radially fixedly effect of impeller 3, this list fulcrum roller is simple in structure, can effectively reduce with blood contacting surface long-pending, and then reduce the blood resides district, significantly reduce incidence of thrombus; Described ball 205 is designed to hemispherical, can make base 2 and impeller 3 more firm by the overall structure that single fulcrum roller constitutes; Described ball 205 can adopt not break-out material to make, as pottery;
Described outer steel 305 places in the blade 301, magnet steel 501 places in the power transmission shaft 5 as driving magnet steel in described, the magnet steel that has solved when driving magnet steel and blood runner and being in same cavity is put problem, and is simpler with the structure of seasonal the present invention's list fulcrum magnetomotive centrifugal blood pump; Described outer steel 305 is identical with interior magnet steel 501 quantity, and adjacent pole is staggered over against laying, lock-out in the time of can preventing from rotating; The thickness of described outer steel 305 is 1-2mm, and its shape is preferably cuboid; The thickness of magnet steel 501 is 1-2mm in described, and its shape is preferably cuboid;
The quantity of the blade 301 of described impeller 3 is typically designed to even number, but is not limited only to four or six; The rear end of blade 301 is 5-10mm apart from the distance of impeller 3 central axis, the length＜30mm of blade 301; When assembling was finished, the gap width between the rear end of described blade 301 and first boss 201 was 0.5mm; It is crooked backward that the shape of described blade 301 is preferably the front end edge direction of flow of blood, can effectively reduce erythrocytic shearing force in the blood, prevents haemolysis.
The shape of described drop-center 304 is preferably hemispherical; The quantity of the boss of described base 2 is at least three, but is not limited only to three, and the design of this boss can effectively reduce priming volume; Be not limited only to be threaded between described outer wall 104 and second boss 201, any connected mode all can, seal as viscous adhesive; The external diameter of described outer wall 104 is 40-60mm; Described pump housing placing device 6 concavo-convex band pins, its effect are the fixing pump housings, prevent the pump housing with driving shaft 5 rotations, so these parts are omissible.
The operation principle of single fulcrum magnetomotive centrifugal blood pump of the present invention is: rotor 401 rotates, driving power transmission shaft 5 rotates, place the interior magnet steel 501 of power transmission shaft 5 inside to follow rotation, and then driving outer steel 305 rotates, place outer steel 305 impeller of blade 301 inside to rotate, blood enters into the cavity that top cover 1 and base form by entrance 101, is flowed down by the gap between the connecting rod 303 of impeller 3, under the centrifugal action of impeller 3, pump from exporting 102.This list fulcrum magnetomotive centrifugal blood pump possesses the advantage of low priming volume, and priming volume can reach in the 23ml, can effectively reduce the incidence rate of thrombosis and haemolysis, and simultaneously simple in structure firm, easy for installation, cost is low.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the inventive method; can also make some improvement and replenish, these improvement and replenish and also should be considered as protection scope of the present invention.
Claims (9)
1. a single fulcrum magnetomotive centrifugal blood pump is provided with the pump housing and driving device, it is characterized in that,
The described pump housing comprises top cover, base, impeller and outer steel, and described base is provided with at least three layers of boss, and the boss on top is provided with groove, lays ball in the described groove, and the bottom center of described base is provided with patchhole; Described impeller is provided with blade and is connected with ring-type, the inner ring that described ring-type connects is provided with connecting rod, described connecting rod compiles in central authorities, and the drop-center of circular arc is formed on the bottom, and described drop-center cooperates the single fulcrum roller of formation with ball in the boss groove; Described outer steel is located at blade interior;
Described driving device comprises power transmission shaft and is provided with the drive motors of rotor, described driving sleeve and is inserted in inserting in the hole of base on rotor, the inside of power transmission shaft is provided with interior magnet steel, magnet steel is identical with outer steel quantity over against laying in described, and adjacent pole is staggered.
2. single fulcrum magnetomotive centrifugal blood pump according to claim 1 is characterized in that described outer steel is cuboid or cylinder.
3. single fulcrum magnetomotive centrifugal blood pump according to claim 1 is characterized in that, described interior magnet steel is cuboid or cylinder.
4. single fulcrum magnetomotive centrifugal blood pump according to claim 1 is characterized in that described base is provided with three layers of boss.
5. single fulcrum magnetomotive centrifugal blood pump according to claim 1 is characterized in that described ball is sphere or hemispherical.
6. single fulcrum magnetomotive centrifugal blood pump according to claim 1 is characterized in that described ball is made by pottery.
7. single fulcrum magnetomotive centrifugal blood pump according to claim 1 is characterized in that, described blade is prismatic blade or crooked backward along direction of flow of blood.
8. single fulcrum magnetomotive centrifugal blood pump according to claim 1 is characterized in that, the quantity of described blade is four or six.
9. single fulcrum magnetomotive centrifugal blood pump according to claim 1 is characterized in that described drive motors outside is provided with pump housing placing device, and described pump housing placing device is a concave station.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210274047.8A CN103191476B (en) | 2012-08-03 | 2012-08-03 | Single-fulcrum magnetomotive centrifugal blood pump |
| PCT/CN2012/081203 WO2014019274A1 (en) | 2012-08-03 | 2012-09-10 | Single-fulcrum magnetomotive centrifugal blood pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210274047.8A CN103191476B (en) | 2012-08-03 | 2012-08-03 | Single-fulcrum magnetomotive centrifugal blood pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103191476A true CN103191476A (en) | 2013-07-10 |
| CN103191476B CN103191476B (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210274047.8A Active CN103191476B (en) | 2012-08-03 | 2012-08-03 | Single-fulcrum magnetomotive centrifugal blood pump |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103191476B (en) |
| WO (1) | WO2014019274A1 (en) |
Cited By (8)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104436338A (en) * | 2013-09-17 | 2015-03-25 | 上海市东方医院 | Implantable self-suspension axial-flow blood pump |
| CN104373356A (en) * | 2014-11-14 | 2015-02-25 | 中国科学院苏州生物医学工程技术研究所 | Medical semi-maglev centrifugal pump based on steel ball |
| CN107115573A (en) * | 2017-05-09 | 2017-09-01 | 李国荣 | Single fulcrum centrifugal pump heart-assist device |
| CN107670135A (en) * | 2017-09-18 | 2018-02-09 | 上海交通大学医学院附属上海儿童医学中心 | A kind of single fulcrum magnetomotive drive-type centrifugal pump and its drive component |
| CN107715203A (en) * | 2017-09-18 | 2018-02-23 | 上海交通大学医学院附属上海儿童医学中心 | A kind of single fulcrum magnetomotive drive-type centrifugal pump |
| CN107503953A (en) * | 2017-09-21 | 2017-12-22 | 深圳核心医疗器械有限公司 | A kind of apparatus and method of fast verification blood pump pressure flow curve |
| CN114099940A (en) * | 2021-11-25 | 2022-03-01 | 山东大学 | Mixed-flow blood pump and extracorporeal circulation auxiliary system |
| WO2024000758A1 (en) * | 2022-07-01 | 2024-01-04 | 微创投资控股有限公司 | Medical device |
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| Publication number | Publication date |
|---|---|
| CN103191476B (en) | 2015-03-11 |
| WO2014019274A1 (en) | 2014-02-06 |
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