WO1997049439A1 - Blutpumpe - Google Patents
Blutpumpe Download PDFInfo
- Publication number
- WO1997049439A1 WO1997049439A1 PCT/EP1997/002904 EP9702904W WO9749439A1 WO 1997049439 A1 WO1997049439 A1 WO 1997049439A1 EP 9702904 W EP9702904 W EP 9702904W WO 9749439 A1 WO9749439 A1 WO 9749439A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pump
- blood
- housing
- outlet
- motor
- Prior art date
Links
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
- A61M60/40—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
-
- 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
- A61M60/165—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart
-
- 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
- A61M60/165—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart
- A61M60/178—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular 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
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/20—Type thereof
- A61M60/205—Non-positive displacement blood pumps
- A61M60/216—Non-positive displacement blood pumps including a rotating member acting on the blood, e.g. impeller
- A61M60/237—Non-positive displacement blood pumps including a rotating member acting on the blood, e.g. impeller the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps
-
- 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
- A61M60/408—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable
- A61M60/411—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable generated by an electromotor
- A61M60/416—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable generated by an electromotor transmitted directly by the motor rotor drive shaft
-
- 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
- A61M60/825—Contact bearings, e.g. ball-and-cup or pivot bearings
-
- 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
Definitions
- the invention relates to a blood pump, preferably an implantable blood pump for supporting or replacing the cardiac function on the left and / or right side.
- An implantable blood pump is known from US Pat. No. 4,994,078, which is designed in the manner of a worm housing, the stator of the motor being integrated into the pump housing, while the rotor is firmly connected to a pump wheel and the blood stream flows around it.
- the blood thus flows through the interior of the motor, one wall of the ring channel formed by the motor being stationary while the other wall is rotating.
- EP 0 611 580 A2 describes an artificial heart pump in which the rotor and the stator of the motor are also flushed with blood.
- a pump wheel On the outlet side there is a pump wheel, which is designed as a radial pump and draws blood into one axially along the stator pumps the surrounding ring canal, from which the blood emerges tangentially.
- a blood pump which has a screw-shaped rotor which surrounds a stator.
- the object of the invention is to create a blood pump in which blood damage and thrombus formation are largely avoided.
- the motor is housed coaxially as a closed unit in an elongated pump housing, an annular channel being formed between the pump housing and the motor housing and the blood flowing through it.
- the pump wheel is arranged at the inlet-side end of the motor and, together with a transition part of the pump housing, forms a diagonally flowed through pump, which produces a swirling axial flow that surrounds the motor housing in a ring.
- the blood flow therefore takes place in the area of the motor between two stationary parts, namely the pump housing and the motor housing, as a result of which additional shear stresses on the blood outside the rotating part of the pump blades are avoided.
- the blood flow flowing along the motor housing causes the motor to cool continuously as long as the pump is working.
- the motor is cooled by the blood flowing along it.
- the pump housing is elongated and essentially tubular and without rotating ring channels or other thickenings. This enables simple and space-saving implantation near the heart, taking into account the physiological conditions.
- the axial blood flow along the pump housing can have a peripheral component, the blood flowing helically around the motor housing.
- the pump housing has a length of approximately 5 to 10 cm and an outer diameter of approximately 2 to 3 cm.
- the inlet and the outlet are tapered in relation to the outer diameter of the pump housing.
- the outlet leads laterally out of the pump housing.
- an end wall can be provided at the outlet-side end of the pump housing, which contains a helical channel leading to the outlet with the angle of the flow there.
- a connection point is placed in the ventricle so that it is relieved by taking blood.
- the pump inlet is connected to the connection point, while the pump outlet is connected to the aorta.
- the outlet of this embodiment which is angled at approximately 90 ° with respect to the inlet, is also physiologically favorable for atrial aorta cannulae.
- connection of the blood pump inlet to the atrium can be closed again after the connection has been removed become.
- the heart can therefore resume its independent work. This method is preferred if there is the possibility of long-term heart recovery or if the pump is to serve as a chronic support pump for the reduced, but still active heart.
- the outlet leads axially out of the pump housing.
- FIG. 1 shows a longitudinal section through a first embodiment of the blood pump
- Fig. 2a and 2b are schematic representations of the use of the blood pump on the heart.
- Fig. 3 shows a second embodiment of the blood pump with an axially directed inlet and outlet.
- the blood pump BP according to FIG. 1 has an elongated, tubular pump housing 10 which is provided with an inlet part 11 at one end.
- the inlet part 11 has an inlet 12, the inner diameter of which is smaller than the inner diameter of the pump housing 10.
- an annular transition part 13 is formed, which is of an arcuate shape and has an S-shaped curvature from the diameter of the inlet 12 transferred the inner diameter of the pump housing 10 smoothly and without kinks.
- the motor housing 15 of a motor 16, which is an electric motor, is fastened to this end wall 14.
- the motor housing 15 protrudes from the end wall 14. It is completely sealed, the electrical lines being passed through a passage 17 in the motor housing 15.
- the outlet 18 is located on an outlet nozzle 19 which laterally extends tangentially from the end wall 14.
- a helical channel 20 runs in the direction of the axial flow, which is subjected to swirl, from 21 to the outlet 18, with only an axial extension.
- a pump wheel 22 is arranged in the inlet part 11 of the pump housing 10. This consists of a hub 23 from which blades 24 protrude.
- the pump wheel 22 is driven by the motor 16 via a magnetic coupling, which can be designed as a front rotary coupling 25 or central rotary coupling.
- This has a first coupling part 25a, which is connected to the rotor of the motor 16 and is encapsulated in the interior of the motor housing 15, and a second coupling part 25b, which is arranged in the hub 23 of the pump wheel 22.
- Both coupling parts 25a, 25b have magnets 28, which cause the second coupling part 25b to rotate when the first coupling part 25a rotates.
- the motor housing 15 is closed with an amagnetic, non-conductive cap 26, on which a combined axial / radial bearing 27 in the form of a ball is removed. is supported.
- This bearing 27 in turn supports the hub of the impeller 22.
- the magnets 28 of the front rotary coupling 25 generate an axial holding force which is greater than the reaction force generated when the pump wheel 22 is rotated, so that the pump wheel 22 is pulled in the direction of the motor 16 by the magnetic force and pressed against the bearing 27.
- the axial holding force of the coupling 25 is compensated centrally on the cap 26 by a further axial bearing support 25d in connection with the bearing 27, so that neither the bearing of the motor 26 nor the thin cap 26 this force in its peripheral wall 26b and on the end face 26a have to take up.
- an arm star 29 is fastened in the inlet 12 and has a bearing journal 30 which axially engages in the hub 23 of the pump wheel 22.
- the guide vanes 24 of the pump wheel 22 have an outer diameter at the inflow end 24a which corresponds essentially to the diameter of the inlet 12, so that the pump wheel here covers the entire diameter of the inlet channel. Following the inlet edges 24a there is a concave-arc-shaped circumferential region 24b which follows the transition part 13 of the pump housing at a short distance. Following this, the pump blades 24 have a region 24c, the diameter of which is approximately as large as the outer diameter of the motor housing 15 at that end which faces the pump wheel 22. The outside diameter of the diagonal pump Pen blades 24 is made as large as the overall diameter of the transition part 13 allows.
- annular channel 35 which extends in the longitudinal direction.
- This ring channel 35 is designed as a diffuser in that its cross-sectional area increases from the inlet to the outlet. This results in a slowdown in blood flow and thus an increase in pressure.
- the expansion of the cross-sectional area of the ring channel 35 is achieved by a corresponding change in the wall thickness of the pump housing 10 and motor housing 15.
- the motor 16 causes the pump wheel 22 to rotate, the paddle wheels 24 of which are of helical design.
- blood is drawn axially from the inlet 12 and conveyed into the ring channel 25 with a rotating peripheral component. From there, the blood passes through the helical channel 20, the course and slope of which is adapted to that of the rotating blood stream, to the lateral outlet 18.
- FIG. 2a shows the blood pump BP according to FIG. 1 in the state in which it is used on the heart.
- the inlet 12 of the blood pump BP is connected via a hose to an access 40 created on the left ventricle LV.
- the outlet 18 of the blood pump BP is connected to an access 43 created on the aorta AO.
- the blood pump BP according to FIG. 2b can be connected via an access 40a created at the atrium LA and deliver blood into the aorta AO via an access 43a.
- the lateral outlet of the outlet 18 from the pump housing 10 facilitates the arrangement of the blood pump on the heart and its connection to the heart / atrium on the one hand and the aorta on the other hand.
- the outlet 18 is arranged coaxially with the inlet 12. It is part of an outlet part 50 which is similar to that. Inlet part 11 is formed and has an arcuate transition region 51 which leads from the annular channel 35 to the outlet 18 in a flow-favorable manner. For the same purpose, a projection 52 which tapers continuously in the flow direction is provided at the rear end of the motor housing 15.
- radial guide blades 53, 54 are provided, the function of which is on the one hand to hold the motor housing and on the other hand to guide the rotating blood flow.
- the guide vanes 53 (in relation to the axial direction) have a relatively large angle of attack in the region 53a, which is selected so that the flow against the guide vanes 53 is without flow separation.
- the angle of attack is smaller in the rear region 53b.
- the guide vanes 54 have a smaller angle of attack.
- the angles of attack essentially correspond to the flow rotation at the respective points.
- FIG. 3 is designed in the same way as the blood pump according to FIG. 1. It is provided with a magnetic coupling 25 for driving the pump wheel 22. Alternatively, there is the possibility of connecting the pump wheel 22 directly to the motor shaft 16a, but a shaft seal on the motor housing is then required.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/202,538 US6116862A (en) | 1996-06-25 | 1997-06-04 | Blood pump |
EP97925044A EP0907386B1 (de) | 1996-06-25 | 1997-06-04 | Blutpumpe |
DE59709443T DE59709443D1 (de) | 1996-06-25 | 1997-06-04 | Blutpumpe |
JP50218498A JP4015196B2 (ja) | 1996-06-25 | 1997-06-04 | 血液ポンプ |
CA002258622A CA2258622C (en) | 1996-06-25 | 1997-06-04 | Blood pump |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19625300A DE19625300A1 (de) | 1996-06-25 | 1996-06-25 | Blutpumpe |
DE19625300.4 | 1996-06-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997049439A1 true WO1997049439A1 (de) | 1997-12-31 |
Family
ID=7797898
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1997/002904 WO1997049439A1 (de) | 1996-06-25 | 1997-06-04 | Blutpumpe |
Country Status (6)
Country | Link |
---|---|
US (1) | US6116862A (de) |
EP (1) | EP0907386B1 (de) |
JP (1) | JP4015196B2 (de) |
CA (1) | CA2258622C (de) |
DE (2) | DE19625300A1 (de) |
WO (1) | WO1997049439A1 (de) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
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DE10016422A1 (de) * | 2000-04-01 | 2001-10-04 | Impella Cardiotech Ag | Parakardiale Blutpumpe |
WO2002045775A2 (de) | 2000-12-05 | 2002-06-13 | Impella Cardiosystems Ag | Verfahren zum kalibrieren eines drucksensors oder eines flusssensors an einer rotationspumpe |
EP1374928A1 (de) | 2002-06-21 | 2004-01-02 | Helmut Mückter | Blutpumpe mit einem Impeller |
US6984201B2 (en) | 2000-09-23 | 2006-01-10 | Harefield Cardiac Limited | Blood circulation assistance device |
US10376162B2 (en) | 2016-09-19 | 2019-08-13 | Abiomed, Inc. | Cardiovascular assist system that quantifies heart function and facilitates heart recovery |
EP3701979A1 (de) * | 2019-02-26 | 2020-09-02 | Berlin Heart GmbH | Implantierbare blutpumpe zum unterstützen einer herzfunktion |
US10765791B2 (en) | 2017-06-09 | 2020-09-08 | Abiomed, Inc. | Determination of cardiac parameters for modulation of blood pump support |
US10960118B2 (en) | 2018-07-31 | 2021-03-30 | Abiomed, Inc. | Systems and methods for controlling a heart pump to minimize myocardial oxygen consumption |
US11574741B2 (en) | 2018-06-19 | 2023-02-07 | Abiomed, Inc. | Systems and methods for determining cardiac output |
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USRE43299E1 (en) * | 2000-04-01 | 2012-04-03 | Impella Cardiosystems Ag | Paracardiac blood pump |
WO2001074419A1 (de) | 2000-04-01 | 2001-10-11 | Impella Cardiotechnik Ag | Parakardiale blutpumpe |
DE10016422A1 (de) * | 2000-04-01 | 2001-10-04 | Impella Cardiotech Ag | Parakardiale Blutpumpe |
DE10016422B4 (de) * | 2000-04-01 | 2013-10-31 | Impella Cardiosystems Ag | Parakardiale Blutpumpe |
AU775684B2 (en) * | 2000-04-01 | 2004-08-12 | Impella Cardiotechnik Ag | Paracardial blood pump |
US6942611B2 (en) | 2000-04-01 | 2005-09-13 | Impella Cardiosystems Ag | Paracardiac blood pump |
US6984201B2 (en) | 2000-09-23 | 2006-01-10 | Harefield Cardiac Limited | Blood circulation assistance device |
US7010954B2 (en) | 2000-12-05 | 2006-03-14 | Impella Cardiosystems Ag | Method for calibrating a pressure sensor or a flow sensor at a rotary pump |
WO2002045775A2 (de) | 2000-12-05 | 2002-06-13 | Impella Cardiosystems Ag | Verfahren zum kalibrieren eines drucksensors oder eines flusssensors an einer rotationspumpe |
EP1339443B1 (de) * | 2000-12-05 | 2016-01-20 | Abiomed Europe GmbH | Verfahren zum Kalibrieren eines Drucksensors oder eines Flusssensors an einer Rotationspumpe |
EP1374928A1 (de) | 2002-06-21 | 2004-01-02 | Helmut Mückter | Blutpumpe mit einem Impeller |
US11197618B2 (en) | 2016-09-19 | 2021-12-14 | Abiomed, Inc. | Cardiovascular assist system that quantifies heart function and facilitates heart recovery |
US10376162B2 (en) | 2016-09-19 | 2019-08-13 | Abiomed, Inc. | Cardiovascular assist system that quantifies heart function and facilitates heart recovery |
US11529062B2 (en) | 2017-06-09 | 2022-12-20 | Abiomed, Inc. | Determination of cardiac parameters for modulation of blood pump support |
US10765791B2 (en) | 2017-06-09 | 2020-09-08 | Abiomed, Inc. | Determination of cardiac parameters for modulation of blood pump support |
US11574741B2 (en) | 2018-06-19 | 2023-02-07 | Abiomed, Inc. | Systems and methods for determining cardiac output |
US10960118B2 (en) | 2018-07-31 | 2021-03-30 | Abiomed, Inc. | Systems and methods for controlling a heart pump to minimize myocardial oxygen consumption |
WO2020173966A1 (de) * | 2019-02-26 | 2020-09-03 | Berlin Heart Gmbh | Implantierbare blutpumpe zum unterstützen einer herzfunktion |
EP3701979A1 (de) * | 2019-02-26 | 2020-09-02 | Berlin Heart GmbH | Implantierbare blutpumpe zum unterstützen einer herzfunktion |
Also Published As
Publication number | Publication date |
---|---|
CA2258622A1 (en) | 1997-12-31 |
EP0907386A1 (de) | 1999-04-14 |
DE59709443D1 (de) | 2003-04-10 |
DE19625300A1 (de) | 1998-01-02 |
JP2000513251A (ja) | 2000-10-10 |
JP4015196B2 (ja) | 2007-11-28 |
CA2258622C (en) | 2005-07-26 |
US6116862A (en) | 2000-09-12 |
EP0907386B1 (de) | 2003-03-05 |
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