CN104069555B - A kind of heart assistance axial blood pump - Google Patents
A kind of heart assistance axial blood pump Download PDFInfo
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- CN104069555B CN104069555B CN201410294962.2A CN201410294962A CN104069555B CN 104069555 B CN104069555 B CN 104069555B CN 201410294962 A CN201410294962 A CN 201410294962A CN 104069555 B CN104069555 B CN 104069555B
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- China
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- impeller
- ball
- blade
- pump
- hub
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Classifications
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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
Abstract
The present invention relates to a kind of medical apparatus and instruments, specifically a kind of human implantable the heart for assisting patient exhaustion, support sanguimotor heart assistance axial blood pump.The present invention is made up of pumping system and electric system two large divisions, it is characterized in that the center at pumping system impeller hub two ends, inlay a ball head and a ball-and-socket bearing respectively, by the ball-and-socket bearing inlayed respectively in the wheel hub of forward and backward stator, a ball head, support rotary blade.When impeller rotates, it is possible to radially free regulation of mental activities, therefore significantly reduce mechanical abrasion and the frictional heat effect of " axle bearing ", reduce the mechanical vibration of impeller, improve working life and the stability of blood pump, and decrease the complication such as haemolysis and thrombosis；Impeller blade is variable-pitch propeller shape, and wheel hub is olive-shaped so that impeller streamline performance is better；The blood that rear guide vane displacement claw-like blade can be released impeller effectively is become direct current from eddy flow, substantially increases the work efficiency of blood pump.
Description
Technical field
The present invention relates to a kind of medical apparatus and instruments, specifically a kind of human implantable the heart for assisting patient exhaustion, support sanguimotor heart assistance axial blood pump.
Background technology
According to World Health Organization's statistics display, cardiovascular disease is to threaten the first killer of human health, accounts for the 30% of annual global death toll.Finally all there is " heart failure " in cardiovascular disease, and namely cardiac pumping function is not enough.The treatment current maximally effective way of heart failure in whole latter stage is " heart transplantation " and " artificial heart ", but makes " heart transplantation " to become symbolistic technology very little because of donor；Then " ventricular assist device " i.e. " machinery blood pump " just becomes particularly important." machinery blood pump " is widely used clinically at present, but clinical practice is also faced with many problems, the complication such as haemolysis, thrombosis importantly occurs, and because bearing high-speed resistance easily produces mechanical breakdown, these problems all can cause patient death.
At present, " machinery blood pump " clinically it is applied to more with axial blood pump.Axial blood pump is made up of motor and pump housing two large divisions, wherein motor section is divided and is included stator and rotor, pump body portion includes pump line, impeller and forward and backward stator, and owing to the rotor of motor and the impeller of the pump housing are integrated, therefore axial blood pump is referred to as " pump is machine integrated ".
Known axial blood pump great majority adopt the impeller of " axle bearing " to prop up support system, put pilot blade, impeller, rear guide vane in the pump line of the pump housing successively.Impeller central has a fulcrum traverse, and two tubulose sliding bearings are embedded in forward and backward stator center respectively, to support axle and impeller rotation.Owing to machining accuracy and assembly precision are difficult to meet strictly concentric, the coaxial strict high-precision requirement of impeller and forward and backward stator three, there will be " axle bearing " sliding friction gmatjpdumamics big, the even situation of machinery locking, when impeller high speed rotating (being generally operational in 10000-15000 rev/min), the mechanical wear of " axle bearing " accelerated degree, it is easy to that there was a mechanical failure, causes blood pump stall；And in blood pump work process, along with the abrasion of " axle bearing " is accelerated, the temperature rise of pump improves, vibration and noise strengthen, and therefore cause the complication such as haemolysis and thrombosis.
Known axial blood pump also has the impeller of the magnetic suspension structure adopting mechanical bearing to prop up support system, although the problem that this structure solves abrasion, vibration and heating, the life-span of pump is long, but, owing to magnetic suspension structure is complicated, piece volumes is big, and the back and the dead angle of blood flow are more, thrombosis problem seems more serious, and this also have impact on the result of use of pump.
As can be seen here, optimizing blood pump structure, reduce the complication such as haemolysis and thrombosis, the stability of raising pump and working life are the keys of machinery blood pump technology.
Summary of the invention
It is an object of the invention to provide a kind of can reduce the complication such as haemolysis and thrombosis, good stability, long working life the self-aligning bearing that has prop up the heart assistance axial blood pump of support system.
The present invention is formed " pump assembly is fit " by pumping system and drive motor system two large divisions, and pumping system is made up of pump barrel, impeller, pilot blade, rear guide vane；Drive motor system is made up of interior p-m rotor and stator core stator coil winding, axial-flow pump motor housing, energy supply wire；The p-m rotor of drive motor system is embedded in the impeller hub of pumping system, it is characterized in that: have a pair ball head and ball-and-socket bearing to be set in impeller hub front end and the center of pilot blade wheel hub rear end respectively, ball head and ball-and-socket bearing are set in rear guide vane hub nose and the center of impeller hub rear end by respectively, and the coordinating to be of the two pairs of ball heads and ball-and-socket bearing is slidably matched.When impeller rotates, radially can freely adjust center, significantly reduce " axle bearing " sliding hard friction because the concentric problem of machining accuracy and the axiality problem of assembly precision cause and gmatjpdumamics, completely eliminate the generation of machinery locking situation, reduce mechanical vibration, noise and frictional heat, extend the life-span of bearing and pump, decrease complication.
The center of above-mentioned ball-and-socket bearing has a ball-and-socket bearing oils and fats to store lubrication nest, is used for storing lubricant grease, reduces the force of sliding friction of ball-and-socket bearing and ball head.
Above-mentioned impeller blade is variable-pitch propeller shape, and impeller hub is olive-shaped.
Arranging forward and backward stator at impeller two ends, pilot blade is the prismatic blade of three or four；Rear guide vane is the displacement claw-like blade of three or four, and claw-like blade is enclosed within the rear end of impeller hub, and is matched in clearance.
The present invention has the following advantages compared with prior art:
Due to the fact that have employed " ball head ball-and-socket bearing " supports the impeller of high speed rotating, when impeller rotates, can radially free regulation of mental activities, therefore the mechanical abrasion of " axle bearing " is significantly reduced, reduce frictional heat effect, it is prevented that thrombosis in pump, reduce beating and vibrating of impeller, decrease mechanical hemolysis due, and improve the working life of axial blood pump and the stability of continuous firing；Owing to impeller blade is variable-pitch propeller shape, impeller hub is olive-shaped so that impeller streamline performance is better；The displacement claw-like blade of rear guide vane is enclosed within the rear end of impeller hub, and the blood that can effectively impeller be released is become direct current from eddy flow, substantially increases the work efficiency of pump.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the schematic diagram of ball head ball-and-socket bearing.
Fig. 3 is ball-and-socket bearing generalized section.
Fig. 4 is the impeller schematic diagram with bearing.
In figure: 1. pump barrel, 2. impeller, 3. impeller hub, 4. p-m rotor, 5. impeller blade, 6. ball head, 7. ball-and-socket bearing, 8. pilot blade, 9. pilot blade wheel hub, 10. rear guide vane, 11. rear guide vane wheel hubs, 12. claw-like blade, 13. stator cores, 14. stator coil windings, 15. axial-flow pump motor housing, 16. energy supply wires, 17. pump intakes, 18. pump discharge, 19. artificial blood vessels, 20. ball-and-socket bearing oils and fatss store lubrication nest.
Detailed description of the invention
The present invention is formed " pump assembly is fit " by pumping system and drive motor system two large divisions, and wherein pumping system is made up of pump barrel 1, impeller 2, pilot blade 8, rear guide vane 10；Drive motor system is made up of p-m rotor 4, stator core 13, stator coil winding 14, axial-flow pump motor housing 15, energy supply wire 16；P-m rotor 4 is embedded in impeller hub 3；A pair ball head 6 and ball-and-socket bearing 7 are set in impeller hub 3 front end and the center of pilot blade wheel hub 9 rear end respectively, ball head 6 and ball-and-socket bearing 7 are set in rear guide vane wheel hub 11 front end and the center of impeller hub 3 rear end by respectively, and the coordinating to be of the two pairs of ball heads 6 and ball-and-socket bearing 7 is slidably matched.When impeller 2 rotates, it is possible to freely adjust center, the force of sliding friction of " axle bearing " is little, eliminates machinery locking situation, reduces mechanical vibration, noise and frictional heat, extend the life-span of bearing and pump, decrease complication.
The center of above-mentioned ball-and-socket bearing 7 has a ball-and-socket bearing oils and fats to store lubrication nest 20, is used for storing lubricant grease, reduces the force of sliding friction of ball-and-socket bearing 7 and ball head 6.
The impeller blade 5 of above-mentioned impeller 2 is axial screw shape, and impeller hub 3 is fairshaped olive-shaped, i.e. similar olive fruit or American football shape so that impeller streamline performance is better.Above-mentioned rear guide vane 10 is made up of rear guide vane wheel hub 11 and claw-like blade 12, and claw-like blade 12 is the blade of three or four displacements, and claw-like blade 12 is enclosed within the rear end of impeller hub 3, and is matched in clearance, it is simple to automatic aligning when impeller 2 rotates.
Axial blood pump is implanted to the internal of Patients with Cardiac Failure, and pump intake 17 connects a bend pipe, connects with the apex otch of heart, and pump discharge 18 couples artificial blood vessel 19, and the other end of artificial blood vessel 19 is connected by " side " is identical with human aortic.When drive motor works, the rotating excitation field of stator coil winding 13 generation and the magnetic field interaction of p-m rotor 4, rotation for impeller 2 provides torque and kinetic energy, blood in Patients with Cardiac Failure ventricle is drawn in pump barrel 1 by the negative pressure suction force therefore produced, blood is then through the pushing of impeller 2, after tail stator 10 rectification, supercharging, flow out from pump discharge 18, flow through artificial blood vessel 19, enter in human body artery, this is the basic process of pump blood, realizes blood pump accessory heart with this or replaces heart acting completely.
Claims (1)
1. a heart assistance axial blood pump, " pump assembly is fit " being made up of pumping system and drive motor system two large divisions, pumping system is made up of pump barrel, impeller, pilot blade, rear guide vane；Drive motor system is made up of p-m rotor and stator core, stator coil winding, axial-flow pump motor housing, energy supply wire；The p-m rotor of drive motor system is embedded in the impeller hub of pumping system, it is characterized in that: have a pair ball head and ball-and-socket bearing to be set in impeller hub front end and the center of pilot blade wheel hub rear end respectively, ball head and ball-and-socket bearing are set in rear guide vane hub nose and the center of impeller hub rear end by respectively, and the coordinating to be of the two pairs of ball heads and ball-and-socket bearing is slidably matched；The center of described ball-and-socket bearing has a ball-and-socket bearing oils and fats to store lubrication nest；The blade of described impeller is variable-pitch propeller shape, and impeller hub is olive-shaped；Described impeller two ends arrange forward and backward stator, and pilot blade is the prismatic blade of three or four；Rear guide vane is the displacement claw-like blade of three or four, and claw-like blade is enclosed within the rear end of impeller hub, and is matched in clearance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410294962.2A CN104069555B (en) | 2014-06-27 | 2014-06-27 | A kind of heart assistance axial blood pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410294962.2A CN104069555B (en) | 2014-06-27 | 2014-06-27 | A kind of heart assistance axial blood pump |
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| CN104069555A CN104069555A (en) | 2014-10-01 |
| CN104069555B true CN104069555B (en) | 2016-07-06 |
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| CN201410294962.2A Active CN104069555B (en) | 2014-06-27 | 2014-06-27 | A kind of heart assistance axial blood pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11964145B2 (en) | 2020-07-13 | 2024-04-23 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of manufacture and use |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104274873A (en) * | 2014-10-13 | 2015-01-14 | 长治市久安人工心脏科技开发有限公司 | Miniature apex cordis axial-flow blood pump and implanting method thereof |
| CN107013470B (en) * | 2017-06-05 | 2019-02-05 | 兰州理工大学 | A kind of axial-flow pump |
| AU2018280236A1 (en) | 2017-06-07 | 2020-01-16 | Shifamed Holdings, Llc | Intravascular fluid movement devices, systems, and methods of use |
| CN107456617B (en) * | 2017-08-08 | 2023-11-14 | 长治市久安人工心脏科技开发有限公司 | Implanted axial flow blood pump without rear guide vane |
| EP3710076B1 (en) | 2017-11-13 | 2023-12-27 | Shifamed Holdings, LLC | Intravascular fluid movement devices, systems, and methods of use |
| US10722631B2 (en) | 2018-02-01 | 2020-07-28 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of use and manufacture |
| US11654275B2 (en) | 2019-07-22 | 2023-05-23 | 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 |
| CN113181547B (en) * | 2021-04-23 | 2022-03-18 | 清华大学 | Heart pump with ultrasonic thrombolysis function |
| CN113599692A (en) * | 2021-08-05 | 2021-11-05 | 深圳核心医疗科技有限公司 | Blood pump |
| CN113769260A (en) * | 2021-09-16 | 2021-12-10 | 苏州心岭迈德医疗科技有限公司 | Catheter pump, auxiliary blood pumping system and control method and device of catheter pump |
| CN117427268A (en) * | 2023-12-11 | 2024-01-23 | 四川大学华西医院 | Separated heart auxiliary device through aorta |
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| CN1111732A (en) * | 1994-03-30 | 1995-11-15 | 株式会社索米克石川 | Ball joint |
| US5527159A (en) * | 1993-11-10 | 1996-06-18 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Rotary blood pump |
| CN102397598A (en) * | 2011-11-18 | 2012-04-04 | 武汉理工大学 | Compact axial-flow magnetic-levitation artificial heart pump |
| CN202673993U (en) * | 2011-12-09 | 2013-01-16 | 张洪虎 | Universal ball head bearing |
| CN103877630A (en) * | 2014-04-15 | 2014-06-25 | 长治市久安人工心脏科技开发有限公司 | Heart auxiliary device of axial magnetic force unloading type axial flow pump |
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- 2014-06-27 CN CN201410294962.2A patent/CN104069555B/en active Active
Patent Citations (6)
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| US5527159A (en) * | 1993-11-10 | 1996-06-18 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Rotary blood pump |
| CN1111732A (en) * | 1994-03-30 | 1995-11-15 | 株式会社索米克石川 | Ball joint |
| CN102397598A (en) * | 2011-11-18 | 2012-04-04 | 武汉理工大学 | Compact axial-flow magnetic-levitation artificial heart pump |
| CN202673993U (en) * | 2011-12-09 | 2013-01-16 | 张洪虎 | Universal ball head bearing |
| CN103877630A (en) * | 2014-04-15 | 2014-06-25 | 长治市久安人工心脏科技开发有限公司 | Heart auxiliary device of axial magnetic force unloading type axial flow pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11964145B2 (en) | 2020-07-13 | 2024-04-23 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of manufacture and use |
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| Publication number | Publication date |
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| CN104069555A (en) | 2014-10-01 |
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