CN202761778U - Novel centrifugal blood pump - Google Patents
Novel centrifugal blood pump Download PDFInfo
- Publication number
- CN202761778U CN202761778U CN2012203821177U CN201220382117U CN202761778U CN 202761778 U CN202761778 U CN 202761778U CN 2012203821177 U CN2012203821177 U CN 2012203821177U CN 201220382117 U CN201220382117 U CN 201220382117U CN 202761778 U CN202761778 U CN 202761778U
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- blood pump
- boss
- impeller
- novel centrifugal
- pump
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Abstract
The utility model provides a novel centrifugal blood pump which is provided with a pump body and a driving device. The pump body comprises a top cover, a base, an impeller and external magnetic steel. At least three layers of bosses are arranged on the base, a groove is arranged on the boss on the top end and a ball is arranged in the groove. An insertion hole is arranged at the center of the bottom of the base. Vanes and a ring-shaped joint are arranged on the impeller. Connection rods are arranged in the inner ring of the ring-shaped joint and concentrate at the center. A central groove is arranged on the bottom and forms a single-fulcrum bearing by being matched with the ball in the groove of the boss. The external magnetic steel is arranged in the vanes. The driving device comprises a transmission shaft and a driving motor provided with a motor rotor, wherein the transmission shaft is sleeved on the motor rotor and inserted into the insertion hole. Internal magnetic steel is arranged in the transmission shaft. The novel centrifugal blood pump has the advantages of being small in pre-filling amount, simple and stable in structure, convenient to install, low in cost and capable of effectively reducing occurrence rate of thrombus and hemolysis.
Description
Technical field
This utility model relates to technical field of medical instruments, specifically, is a kind of novel centrifugal type blood pump.
Background technology
Cardiovascular and cerebrovascular disease occupies the first place of the human cause of death already in developed country, account for 46% mortality rate, 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 according to statistics, operation on heart has later on part patient (0.6-2%) impaired serious because of cardiac function, 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, sustains life, and waits for heart function recovery.Wherein some patients were 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 generally application, and the 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 makes some 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 electric extrusion 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 take suspension technology as characteristics, 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 magnetism 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 drive systems vane rotary.In stator or pump case, insert another group solenoid, by the magnetized vane rotary of variation generation magnetic force moving of solenoid current.
Third generation blood pump has three developmental stage: first stage is the outer motor Indirect driven 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 vane rotary 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 the solenoid of drive system merges the composition stator, 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 Design of only motion becomes 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 axial-rotation that suspends, 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) Novacor VAD pump: have special inflow system, the design parallel with the pump housing of the flow ipe of this pump, outer formation flat pattern.
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 patient physiological disorderly, and then cause the patient in art and the complication of postoperative, even jeopardizing patient's life, the patient's who especially supports for the long-term assist circulation of needs impact is larger.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 using 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, simultaneously without the bearing wear problem, 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 large with blood contacting surface, and thrombosis is caused in the stagnant area that easily produces blood.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; For baby and neonatal patient, also should possess the advantage of low discharge.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 purpose of this utility model is for deficiency of the prior art, and a kind of novel centrifugal type blood pump is provided.
For achieving the above object, the technical scheme taked of this utility model is:
A kind of novel centrifugal type blood pump is provided with the pump housing and driving device, and 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, lays ball in the described groove, and the bottom center of described base is provided with patchhole; Described impeller is provided with blade and loop connecting, and the inner ring of described loop connecting is provided with connecting rod, and described connecting rod compiles in central authorities, and drop-center 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, and described driving sleeve and is inserted in inserting in the hole of base on rotor, and the inside of power transmission shaft is provided with interior magnet steel, and described interior magnet steel and outer steel are over against laying;
Described outer steel is cuboid or cylinder;
Described interior magnet steel is cuboid or cylinder;
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.
This utility model advantage is:
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 with seasonal Blood pump structure of the present utility model, the advantage that possesses low priming volume, be applicable to making assisted circulation of ventriculus cordis behind the Pediatric Cardiac Surgery, 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 Srgery grafting, can significantly reduce cost simultaneously.
Description of drawings
Accompanying drawing 1 is centrifugal blood pump installation diagram of the present utility model.
Accompanying drawing 2 is centrifugal blood pump pump housing installation diagrams of the present utility model.
Accompanying drawing 3 is top views of Fig. 2.
Accompanying drawing 4 is the second-class survey axonometric drawings of centrifugal blood pump impeller of the present utility model.
Accompanying drawing 5 is upward views of Fig. 4.
Accompanying drawing 6 is the second-class survey axonometric drawings of centrifugal blood pump driving device of the present utility model.
Accompanying drawing 7 is the second-class survey axonometric drawings of the another kind of impeller of centrifugal blood pump of the present utility model.
Accompanying drawing 8 is the second-class survey axonometric drawings of the another kind of driving device of centrifugal blood pump of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment that this utility model provides 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. the 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. loop connecting 303. connecting rods
304. drop-center 305. outer steels
3051. outer steel end face 306. junction surfaces
4. drive motors 401. rotors
5. power transmission shaft 501. interior magnet steel
6. pump housing placing device
Embodiment 1
Please refer to Fig. 1, Fig. 1 is centrifugal blood pump installation diagram of the present utility model.Described 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 centrifugal blood pump pump housing installation diagram of the present utility model.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 top view of Fig. 2) as seen, described outlet 102 places outer wall 104 surfaces along the efferent tract tangential direction.
Please refer to Fig. 2, described base 2 comprises the first boss 201, the second boss 202 and the 3rd boss 203 again.The first boss top 2011 of described the 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 the first boss 201 is hollow circular cylinder; Described the second boss 202 also is hollow circular cylinder, its outer wall is provided with external screw thread (not shown), the top of the second boss 202 links to each other with the first boss 201, and the bottom links to each other with the top of the 3rd boss 203, and the diameter of the 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 the second boss 202 diameters, and the while is greater than the diameter of outer wall 104; The inside of the hollow of described the first boss main body 2012, the 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 centrifugal blood pump impeller of the present utility model.Described impeller 3 is provided with loop connecting 302, described loop connecting 302 is annular ring, 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 hemispherical.The lower end of described loop connecting 302 is provided with four blades 301, and described four blade 301 arrays discharging is as a whole by loop connecting 302 connections, forms half 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, described driving device comprises drive motors 4 and power transmission shaft 5 again, 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 centrifugal blood pump driving device of the present utility model.Described power transmission shaft 5 outer being enclosed within on the rotor 401 are laid interior magnet steel 501 in the power transmission shaft 5, described interior magnet steel 501 is cylindrical lamellar magnet steel, and is identical with outer steel 305 quantity.
Please refer to Fig. 1, when centrifugal blood pump assembling of the present utility model is finished, the female thread (not shown) of described outer wall 104 bottoms cooperates with the external screw thread (not shown) of the 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 the first boss 201, the ball 205 in described drop-center 304 and the groove 204 matches, and consists of single fulcrum roller; The central axes of the central axis of described impeller 3 and the first boss 201, the distance that the rear end of each blade 301 is identical with the first boss 201 intervals, and parallel with the tangential direction of the first boss 201; The outer steel end face 3051 of described outer steel 305 parallels with the central axis of the first boss 201, and radially vertical with the first boss 201, and intersection point is positioned at the center of outer steel end face 3051; Described interior magnet steel 501 is identical with outer steel 305 quantity and over against laying, and adjacent pole is staggered.Described power transmission shaft 5 is inserted in the patchhole 206 of base 2, and described pump housing erecting device 6 blocks the 3rd boss 203, and the whole pump housing is fixed.
The centrifugal blood pump of the 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 centrifugal blood pump of the present utility model, and described impeller 3 is provided with six blades 301, and described blade 301 is prismatic blade.
The centrifugal blood pump of the present embodiment is substantially the same manner as Example 1, and 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 centrifugal blood pump of the present utility model, and described interior magnet steel 501 is cylinder lamellar magnet steel.Corresponding, described outer steel 305(is not shown) outer steel end face 3051 be cylindrical, namely described outer steel 305 is the lamellar cylinder.
For 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, consist of 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 consists of; Described ball 205 can adopt not break-out material to make, such as pottery;
Described outer steel 305 places in the blade 301, described interior magnet steel 501 places in the power transmission shaft 5, interior magnet steel is as driving magnet steel, and 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 centrifugal blood pump of the present utility model; 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 described interior magnet steel 501 is 1-2mm, 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 the 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 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 the second boss 201, any connected mode all can, close such as the viscosity rubber seal; 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 centrifugal blood pump of the present utility model 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 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 (8)
1. a novel centrifugal type 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 loop connecting, and the inner ring of described loop connecting is provided with connecting rod, and described connecting rod compiles the formation drop-center in central authorities, and the ball in described drop-center and the boss groove cooperates the single fulcrum roller of formation; Described outer steel is located at blade interior;
Described driving device comprises power transmission shaft and is provided with the drive motors of rotor, and described driving sleeve and is inserted in inserting in the hole of base on rotor, and the inside of power transmission shaft is provided with interior magnet steel, and described interior magnet steel and outer steel are over against laying.
2. novel centrifugal type blood pump according to claim 1 is characterized in that, described outer steel is cuboid or cylinder.
3. novel centrifugal type blood pump according to claim 1 is characterized in that, described interior magnet steel is cuboid or cylinder.
4. novel centrifugal type blood pump according to claim 1 is characterized in that, described base is provided with three layers of boss.
5. novel centrifugal type blood pump according to claim 1 is characterized in that, described ball is sphere or hemispherical.
6. novel centrifugal type blood pump according to claim 1 is characterized in that, described ball is made by pottery.
7. novel centrifugal type 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. novel centrifugal type blood pump according to claim 1 is characterized in that, the quantity of described blade is four or six.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203821177U CN202761778U (en) | 2012-08-03 | 2012-08-03 | Novel centrifugal blood pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203821177U CN202761778U (en) | 2012-08-03 | 2012-08-03 | Novel centrifugal blood pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202761778U true CN202761778U (en) | 2013-03-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203821177U Expired - Lifetime CN202761778U (en) | 2012-08-03 | 2012-08-03 | Novel centrifugal blood pump |
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| Country | Link |
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| CN (1) | CN202761778U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014019274A1 (en) * | 2012-08-03 | 2014-02-06 | 上海交通大学医学院附属上海儿童医学中心 | Single-fulcrum magnetomotive centrifugal blood pump |
| 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 |
| CN108785770A (en) * | 2018-04-18 | 2018-11-13 | 清华大学天津高端装备研究院 | A kind of external blood pump that can reduce haemolysis |
-
2012
- 2012-08-03 CN CN2012203821177U patent/CN202761778U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014019274A1 (en) * | 2012-08-03 | 2014-02-06 | 上海交通大学医学院附属上海儿童医学中心 | Single-fulcrum magnetomotive centrifugal blood pump |
| 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 |
| CN108785770A (en) * | 2018-04-18 | 2018-11-13 | 清华大学天津高端装备研究院 | A kind of external blood pump that can reduce haemolysis |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130306 |