CN106377810B - A kind of centrifugal left ventricular assist device - Google Patents
A kind of centrifugal left ventricular assist device Download PDFInfo
- Publication number
- CN106377810B CN106377810B CN201610889175.1A CN201610889175A CN106377810B CN 106377810 B CN106377810 B CN 106377810B CN 201610889175 A CN201610889175 A CN 201610889175A CN 106377810 B CN106377810 B CN 106377810B
- Authority
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- China
- Prior art keywords
- rotor
- interior cavity
- left ventricular
- pump
- ventricular assist
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- 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
-
- 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
-
- 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
- A61M2205/00—General characteristics of the apparatus
- A61M2205/02—General characteristics of the apparatus characterised by a particular materials
-
- 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
- A61M2205/00—General characteristics of the apparatus
- A61M2205/04—General characteristics of the apparatus implanted
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- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Cardiology (AREA)
- Anesthesiology (AREA)
- Mechanical Engineering (AREA)
- Vascular Medicine (AREA)
- Biomedical Technology (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 present invention relates to a kind of centrifugal left ventricular assist devices, including the pump housing, blood flow entrance and the blood stream outlet being arranged on the pump housing, the pump housing includes pump case, the interior cavity being formed on the pump case, it is formed in the outer cavity on the pump case and outside the interior cavity, stator in the external form intracavitary is set, it can be under the action of the stator around the rotor of Pivot Point Center line rotation, the multiple blades that is connected with the rotor and can be rotated with the rotation of the rotor, the blade has inclination angle, the rotor and blade suspension are arranged in the inner mold intracavitary, the blood flow entrance and the blood stream outlet are connected with the interior cavity respectively.The present invention passes through the improvement to centrifugal left ventricular assist device structure so that centrifugal left ventricular assist device have it is efficient, small, the advantages of haemolysis and thrombus can be prevented, can persistently be supported patient.
Description
Technical field
The invention belongs to medical instruments fields, and in particular to a kind of centrifugal left ventricular assist device.
Background technology
Heart disease is the second largest killer of human death, and heart blood supply functional failure is the mark that heart disease deteriorates, directly
It connects and threatens to the life of patient.Global patients with heart failure is increased with annual 50000000 person-times of surprising speed according to statistics, wherein
10000000 patients are dead because of heart blood supply functional failure.Although heart transplant can improve the life of heart blood supply functional failure patient
Rate is deposited, but because of the shortage of donor's heart source so that a large amount of cardiac loses chance for survival.Ventricular assist device can
The blood circulation flow that human normal needs are provided for the patient of cardiac dysfunction, has largely mitigated heart donor
Insufficient situation.Receded disk impeller pump has been widely applied in zoopery and clinic, but due to the abrasion of its mechanical bearing
Problem leads to device vibration aggravation, haemolysis and thrombus occurs in pump.Currently, auxiliary pump substantially have been realized in reduce it is auxiliary
It helps on the basis of pump volume and applies the technology of magnetic liquid suspension, greatly reduce haemolysis, blood caused by auxiliary pump rubs
The problem of bolt, while also meeting the function of heart blood supply.Magnetic suspension auxiliary pump is also afflux mechanics, machinery, medicine, electricity
The application for the cross discipline technology being integrated is learned in, electromagnetism and control, but magnetic levitation technology is applied to left ventricular assist device
In, improve the working condition of device, there is also some problems.Such as, the infection after the improvement of mechanical performance, surgery and blood pump are planted
Enter, wherein port structure in centrifugal auxiliary pump, blade shape etc. directly influence clinical therapeutic efficacy.Based on to
The considerations of upper problem, under the background that current each ambit mutually merges, by changing the design feature of auxiliary pump, Yi Jifu
Help the working method of pump, design develop it is efficient, small, prevent haemolysis and thrombus, the auxiliary device that patient persistently supports will
It is the trend of future development.
Invention content
The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide it is a kind of it is efficient, small, can
Prevent the centrifugal left ventricular assist device of haemolysis and thrombus.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：
It is an object of the present invention to provide a kind of centrifugal left ventricular assist device, including the pump housing, it is arranged described
Blood flow entrance on the pump housing and blood stream outlet, the pump housing includes pump case, the interior cavity that is formed on the pump case, formation
Stator, Neng Gou in the external form intracavitary is arranged in outer cavity on the pump case and outside the interior cavity
It is connected and can turns with described around the rotor of Pivot Point Center line rotation, with the rotor under the action of the stator
The rotation of son and multiple blades for rotating, the blade have an inclination angle, and the setting that suspends of the rotor and the blade exists
The inner mold intracavitary, the blood flow entrance and the blood stream outlet are connected with the interior cavity respectively.
Preferably, the height of the blade is 5 ~ 9mm.
Preferably, the number of the blade is 4 ~ 6.
Preferably, multiple blades are uniformly distributed around the circumferencial direction of the rotor.
Preferably, the material of the pump case and the blade is titanium alloy.
Preferably, the pump housing is cylinder, a diameter of 50 ~ 80mm, is highly 40 ~ 60mm.
Preferably, the internal diameter of the blood flow entrance and the blood stream outlet is 5 ~ 7mm, and outer diameter is 9 ~ 11mm.
Preferably, the pressure difference of the blood flow entrance and the blood stream outlet is 80 ~ 120mmHg.
Preferably, the volume flow of the pump housing is 4 ~ 6L/min.
Preferably, the depth of the interior cavity is more than the depth of the outer cavity.
Preferably, the interior cavity is in cylinder, and the outer cavity is in circle ring column, the axle center of the interior cavity
The axial line of line and the outer cavity overlaps.
Preferably, it is provided on the lateral wall of the pump case for separating the interior cavity and the outer cavity multiple
Reinforcing rib for the intensity for enhancing pump case.
Preferably, the pump case includes shell, covers the pump cover being located on the shell, at the axle center of the pump cover
The first opening being connected with the blood flow entrance is offered, offers on the shell and is connected with the blood stream outlet
The second logical opening.
It is highly preferred that described second is opened on the side wall of the shell.
It is highly preferred that the first faceplate and the second faceplate for extending downwardly protrusion are provided on the lower surface of the pump cover,
It is provided with silica gel sealing washer between first faceplate and second faceplate, when the pump cover and the shell
When mutually lid closes, pump case for separating the interior cavity and the outer cavity is inserted into first faceplate and described
It offsets between second faceplate and with the silica gel sealing washer and sets.
It is highly preferred that the stator includes magnet steel, is evenly distributed on the magnet steel and can generate rotating excitation field
Hot-wire coil.
It is further preferred that offering the conducting wire for the hot-wire coil on the pump cover above the outer cavity
The third of discrepancy is open.
Preferably, the rotor include rotor body, the permanent magnet that is arranged on the rotor body.
It is highly preferred that the rotor further includes logical through the first center being arranged at the axle center of the rotor body
Road；The second central passage, first central passage, second central passage are formed between multiple blades
Axial line identical and three with the internal diameter of blood flow entrance coincides.
It is further preferred that the distance between the side of the rotor and the side chamber wall of interior cavity are less than described
The first central passage internal diameter.
Due to the implementation of above-mentioned technical proposal, the present invention has the following advantages that compared with prior art：
The present invention passes through the improvement to centrifugal left ventricular assist device structure so that centrifugal left ventricular assist device tool
There is the advantages of efficient, small, haemolysis and thrombus can be prevented, can persistently be supported patient.
Description of the drawings
Fig. 1 is the stereogram of the present invention；
Fig. 2 is the sectional view of the present invention；
Fig. 3 is the force analysis figure that rotor and blade can suspend；
Fig. 4 is the stereogram of shell；
Fig. 5 is the vertical view of shell；
Fig. 6 is the stereogram of pump cover；
Fig. 7 is the side view of pump cover；
Fig. 8 is the stereogram of rotor cover；
Fig. 9 is the stereogram one of rotor subject；
Figure 10 is the stereogram two of rotor subject；
Wherein：1, blood flow entrance；2, blood stream outlet；3, interior cavity；4, outer cavity；5, stator；6, blade；7, rotor sheet
Body；71, rotor subject；72, rotor cover；73, storage tank；8, permanent magnet；9, shell；10, pump cover；11, reinforcing rib；12, second
Opening；13, the first opening；14, third is open；15, the first faceplate；16, the second faceplate；17, the first central passage；18, second
Central passage.
Specific implementation mode
With reference to specific embodiment, the present invention will be further described in detail, but the present invention is not limited to following implementations
Example.
As shown in Fig. 1, a kind of centrifugal left ventricular assist device, including the pump housing, the blood flow entrance 1 that is arranged on the pump housing
With blood stream outlet 2.
As shown in Fig. 2, the pump housing includes pump case, the interior cavity 3 that is formed on pump case, is formed on pump case and is located at inner mold
Outer cavity 4 outside chamber 3, can turn under the action of stator 5 around what Pivot Point Center line rotate the stator 5 being arranged in outer cavity 4
Son, the multiple blades 6 that is connected with rotor and can be rotated with the rotation of rotor, blade 6 have inclination angle, blood flow entrance 1
It is connected respectively with interior cavity 3 with blood stream outlet 2.The depth of interior cavity 3 be more than outer cavity 4 depth, consequently facilitating blood from
Interior cavity 3 flow to blood stream outlet 2, and blood is avoided to soak the stator 5 in outer cavity 4.
The hot-wire coil that stator 5 includes magnet steel in a ring, is evenly distributed on magnet steel and can generate rotating excitation field.Such as
The permanent magnet 8 that shown in attached drawing 8 to 10, rotor includes rotor body 7, is arranged on rotor body 7, in the present embodiment, rotor sheet
Body 7 includes rotor subject 71, covers the rotor cover 72 being located on rotor subject 71, is formed with storage tank 73 on rotor subject 71, forever
Magnet 8 is arranged in storage tank 73, and certainly, rotor body 7 can also use other structures to replace.Centrifugal left ventricle auxiliary dress
When setting work, rotating excitation field acts on permanent magnet 8 to form rotation torque, and rotor is by the effect of rotation torque and around itself
Axial line rotates.As shown in Fig. 3, the blade 6 for carrying inclination angle generates power F in rotary course with blood interaction, according to
Power F can be decomposed into the F of horizontal direction by the synthesis and decomposition of power1With the F of vertical direction2.Since hot-wire coil and permanent magnet 8 are equal
Even distribution, therefore the resultant force of horizontal direction is F1 closes=0N, vertical direction resultant force F2 close= n F·sinθ（N is the number of blade）,
Gross mass mg=F of blade 6 and rotor2 closeWhen, rotor and blade 6, which suspend, to be arranged in interior cavity 3, simultaneously as magnet steel and forever
Magnet 8 has certain attraction, to force height and position of the rotor residing for the magnet steel.
As shown in attached drawing 4 to 7, pump case includes shell 9, covers the pump cover 10 being located on shell 9.As shown in attached drawing 2,4 and 5,
Interior cavity 3 and outer cavity 4 be formed on shell 9, and interior cavity 3 is in cylinder, and outer cavity 4 is in circle ring column, and interior cavity 3
The axial line of axial line and outer cavity 4 overlaps.It is provided on the lateral wall of pump case for separating interior cavity 3 and outer cavity 4
Multiple reinforcing ribs 11 for enhancing the intensity of pump case.Offered on the side wall of shell 9 respectively with blood stream outlet 2 and interior cavity 3
The second opening 12 being connected.
As seen in figs. 6 and 7, to be connected respectively with blood flow entrance 1 and interior cavity 3 is offered at the axle center of pump cover 10
One opening 13 offers the third opening 14 of the conducting wire discrepancy for hot-wire coil on the pump cover 10 above outer cavity 4.Pump cover
The first faceplate 15 and the second faceplate 16 for extending downwardly protrusion, the first faceplate 15 and the second faceplate 16 are provided on 10 lower surface
Between be provided in O-shaped silica gel sealing washer, when pump cover 10 is closed with 9 phase lid of shell, for by interior cavity 3 and outer cavity 4
The pump case separated is inserted between the first faceplate 15 and the second faceplate 16 and offsets with silica gel sealing washer and sets, to effectively accomplish
The sealing effect of liquid prevents the blood flowed by blood flow entrance 1 from entering in outer cavity 4 and leading to asking for hot-wire coil short circuit
Topic.
As shown in Fig. 2, rotor further includes through the first central passage 17 being arranged at the axle center of rotor body 7；It is more
Be formed with the second central passage 18 between a blade 6, the first central passage 17, the second central passage 18 and blood flow entrance 1 it is interior
Diameter is identical and the axial line of three coincides.The diameter and height of rotor are slightly less than the diameter and height of interior cavity 3, convenient for turning
Son rotation in interior cavity 3.The distance between the side of rotor and the side chamber wall of interior cavity 3 are less than the interior of the first central passage 17
Diameter.When blood is flowed into from blood flow entrance 1 in the pump housing, most of blood is flow to from the first central passage 17 and the second central passage 18
Blood stream outlet 2, gap of the fraction blood between rotor and the cavity wall of interior cavity 3 flow to blood stream outlet 2.Since gap is big
Side blood flow is big, and pressure is small, and gap it is small side blood flow it is small, pressure is big, thus formed a pressure difference.This
Pressure difference will generate a restoring force that rotor is pushed back to center so that rotor stability is suspended in shaft core position.
The material of pump case and blade 6 is titanium alloy.The pump housing is cylinder, a diameter of 50 ~ 80mm, preferably 65mm, high
Degree is 40 ~ 60mm, preferably 50mm, and the height of blade 6 is 5 ~ 9mm, preferably 8mm, the number of blade 6 be 4 ~ 6 and around
The circumferencial direction of rotor is uniformly distributed, preferably 5, and the internal diameter of blood flow entrance 1 and blood stream outlet 2 is 5 ~ 7mm, preferably 6mm,
Outer diameter is 9 ~ 11mm, preferably 10mm, and the pressure difference of blood flow entrance 1 and blood stream outlet 2 is 80 ~ 120mmHg, preferably 100
The volume flow of mmHg, the pump housing are 4 ~ 6L/min, preferably 5 L/min.
The present invention is described in detail above, its object is to allow the personage for being familiar with this field technology that can understand this
The content of invention is simultaneously implemented, and it is not intended to limit the scope of the present invention, and the present invention is not limited to above-mentioned implementations
, equivalent change or modification made by all Spirit Essences according to the present invention should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of centrifugal left ventricular assist device, including the pump housing, the blood flow entrance that is arranged on the pump housing（1）And blood flow
Outlet（2）, it is characterised in that：The interior cavity that the pump housing includes pump case, is formed on the pump case（3）, be formed in institute
On the pump case stated and it is located at the interior cavity（3）Outer outer cavity（4）, be arranged in the outer cavity（4）Interior stator
（5）, can be in the stator（5）Under the action of around Pivot Point Center line rotation rotor, be connected with the rotor and energy
Enough multiple blades rotated with the rotation of the rotor（6）, the blade（6）With inclination angle, the rotor and
The blade（6）Suspension is arranged in the interior cavity（3）Interior, described blood flow entrance（1）With the blood stream outlet（2）
Respectively with the interior cavity（3）It is connected, the interior cavity（3）Depth be more than the outer cavity（4）Depth, institute
The rotor stated includes rotor body（7）, be arranged in the rotor body（7）On permanent magnet（8）, through being arranged described
Rotor body（7）Axle center at the first central passage（17）；Multiple blades（6）Between be formed with the second central passage
（18）, first central passage（17）, described second central passage（18）With the blood flow entrance（1）Internal diameter phase
Same and three axial line coincides；The side of the rotor and the interior cavity（3）The distance between side chamber wall it is small
In first central passage（17）Internal diameter.
2. centrifugal left ventricular assist device according to claim 1, it is characterised in that：The blade（6）Height
For 5 ~ 9mm, the blade（6）Number be 4 ~ 6 and to be uniformly distributed around the circumferencial direction of the rotor.
3. centrifugal left ventricular assist device according to claim 1, it is characterised in that：The pump case and the leaf
Piece（6）Material be titanium alloy.
4. centrifugal left ventricular assist device according to claim 1, it is characterised in that：The pump housing is cylinder,
A diameter of 50 ~ 80mm is highly 40 ~ 60mm；The blood flow entrance（1）With the blood stream outlet（2）Internal diameter be 5 ~
7mm, outer diameter are 9 ~ 11mm, the blood flow entrance（1）With the blood stream outlet（2）Pressure difference be 80 ~ 120mmHg；Institute
The volume flow for the pump housing stated is 4 ~ 6L/min.
5. centrifugal left ventricular assist device according to claim 1, it is characterised in that：The interior cavity（3）In circle
Cylinder, the outer cavity（4）In circle ring column, the interior cavity（3）Axial line and the outer cavity（4）Axle center
Line overlaps.
6. centrifugal left ventricular assist device according to claim 1, it is characterised in that：For by the interior cavity
（3）With the outer cavity（4）Multiple reinforcing ribs for enhancing the intensity of pump case are provided on the lateral wall of the pump case separated
（11）.
7. centrifugal left ventricular assist device according to claim 1, it is characterised in that：The pump case includes shell
（9）, lid be located at the shell（9）On pump cover（10）, the pump cover（10）Axle center at offer and the blood flow
Entrance（1）The first opening being connected（13）, the shell（9）On offer and the blood stream outlet（2）It is connected
Second opening（12）, the pump cover（10）Lower surface on be provided with extend downwardly protrusion the first faceplate（15）With the second card
Wall（16）, first faceplate（15）With second faceplate（16）Between be provided with silica gel sealing washer, when described
Pump cover（10）With the shell（9）When mutually lid closes, it is used for the interior cavity（3）With the outer cavity（4）It separates
Pump case is inserted into first faceplate（15）With second faceplate（16）Between and offset with the silica gel sealing washer
If.
8. centrifugal left ventricular assist device according to claim 7, it is characterised in that：The stator（5）Including magnetic
Steel, the hot-wire coil for being evenly distributed on the magnet steel and rotating excitation field capable of being generated；Positioned at the outer cavity（4）Top
Pump cover（10）On offer for the hot-wire coil conducting wire come in and go out third opening（14）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610889175.1A CN106377810B (en) | 2016-10-11 | 2016-10-11 | A kind of centrifugal left ventricular assist device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610889175.1A CN106377810B (en) | 2016-10-11 | 2016-10-11 | A kind of centrifugal left ventricular assist device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106377810A CN106377810A (en) | 2017-02-08 |
| CN106377810B true CN106377810B (en) | 2018-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610889175.1A Expired - Fee Related CN106377810B (en) | 2016-10-11 | 2016-10-11 | A kind of centrifugal left ventricular assist device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106377810B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3066361A1 (en) | 2017-06-07 | 2018-12-13 | Shifamed Holdings, Llc | Intravascular fluid movement devices, systems, and methods of use |
| CN111556763B (en) | 2017-11-13 | 2023-09-01 | 施菲姆德控股有限责任公司 | Intravascular fluid movement device and system |
| EP3746149A4 (en) | 2018-02-01 | 2021-10-27 | Shifamed Holdings, LLC | Intravascular blood pumps and methods of use and manufacture |
| CN109985285A (en) * | 2019-04-03 | 2019-07-09 | 李庆国 | Ventricle auxiliary uses centrifugal pump |
| WO2021011473A1 (en) | 2019-07-12 | 2021-01-21 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of manufacture and use |
| WO2021016372A1 (en) | 2019-07-22 | 2021-01-28 | Shifamed Holdings, Llc | Intravascular blood pumps with struts and methods of use and manufacture |
| US11724089B2 (en) | 2019-09-25 | 2023-08-15 | Shifamed Holdings, Llc | Intravascular blood pump systems and methods of use and control thereof |
| CN112833027B (en) * | 2021-03-12 | 2022-12-06 | 宁波众杰来同科技有限公司 | Internal support type magnetic suspension pump |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7052253B2 (en) * | 2003-05-19 | 2006-05-30 | Advanced Bionics, Inc. | Seal and bearing-free fluid pump incorporating a passively suspended self-positioning impeller |
| CN101732769B (en) * | 2010-01-26 | 2011-10-05 | 浙江大学 | Implantable blood pump adopting driven suspension bearing |
| CN206325049U (en) * | 2016-10-11 | 2017-07-14 | 内蒙古工业大学 | A kind of centrifugal left ventricular assist device |
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2016
- 2016-10-11 CN CN201610889175.1A patent/CN106377810B/en not_active Expired - Fee Related
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| CN106377810A (en) | 2017-02-08 |
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Granted publication date: 20181009 Termination date: 20211011 |