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WO1998000185A1 - Pompe a sang realisee selon le principe de la pompe rotative - Google Patents

Pompe a sang realisee selon le principe de la pompe rotative Download PDF

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Publication number
WO1998000185A1
WO1998000185A1 PCT/EP1997/002903 EP9702903W WO9800185A1 WO 1998000185 A1 WO1998000185 A1 WO 1998000185A1 EP 9702903 W EP9702903 W EP 9702903W WO 9800185 A1 WO9800185 A1 WO 9800185A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
blood
channel
bearing
pump wheel
Prior art date
Application number
PCT/EP1997/002903
Other languages
German (de)
English (en)
Inventor
Günter RAU
Helmut Reul
Thorsten Siess
Rolf Eilers
Original Assignee
Rau Guenter
Helmut Reul
Thorsten Siess
Rolf Eilers
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rau Guenter, Helmut Reul, Thorsten Siess, Rolf Eilers filed Critical Rau Guenter
Publication of WO1998000185A1 publication Critical patent/WO1998000185A1/fr

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
    • 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
    • A61M60/221—Non-positive displacement blood pumps including a rotating member acting on the blood, e.g. impeller the blood flow through the rotating member having both radial and axial components, e.g. mixed 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
    • A61M60/20—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
    • A61M60/226—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 radial components
    • A61M60/232—Centrifugal 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
    • A61M60/20—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
    • A61M60/80—Constructional details other than related to driving
    • A61M60/802—Constructional details other than related to driving of non-positive displacement blood pumps
    • A61M60/81—Pump housings
    • A61M60/812—Vanes or blades, e.g. static flow guides
    • 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 based on the rotation principle, that is, a blood pump with a rotating pump wheel.
  • Blood pumps generally have the problem of thrombus formation due to agglomeration of blood particles. This problem also exists with blood pumps based on the rotation principle, in particular in the area of the pump wheel, when there are narrow gaps in which dead water formation can occur.
  • the invention has for its object to provide a blood pump according to the rotary pump principle, in which the risk of thrombus formation in the area of the pump wheel is largely avoided.
  • the pump wheel has an axial channel which hydraulically connects the suction side of the pump wheel with its rear side. This allows blood to get into the rear gap of the pump wheel and rinse it. Due to the pressure difference between the pressure and suction side of the pump wheel, all unshoved surfaces of the pump wheel are washed around.
  • the pump wheel is provided on its rear side facing away from the inflow side with radially promoting auxiliary blades. These auxiliary blades cause an increased active flow through the axial channel and the rear of the pump wheel in the main flow direction. This creates a bypass flow, which is then fed back to the main flow.
  • a second flow path is provided through the pump wheel.
  • This second flow path which is a purge path close to the axis, is flowed through either in countercurrent to the main flow if no auxiliary blading is present, or as a bypass in the same flow direction as the main flow. In any case, dead water areas on the back of the paddle wheel are effectively avoided.
  • the invention is applicable to any form of rotary pump, e.g. Axial pumps, radial pumps and diagonal pumps.
  • Fig. 1 shows a longitudinal section through an embodiment of the blood pump.
  • 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 designed in an arc shape and in an S-shaped curvature from the diameter of the inlet 12 to the inner diameter the pump housing 10 smoothly and smoothly transferred.
  • the motor housing 15 of a motor 16, which is an electric motor, is coaxially fastened in the pump housing 10.
  • the motor housing is completely sealed.
  • 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 a 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 a non-magnetic, non-conductive cap 26, on which a combined axial / radial bearing 27 is supported in the form of a ball.
  • 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 impeller 22 is rotated, so that the impeller 22 is pulled towards the motor 16 by the magnetic force and is 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 record.
  • an arm star 29 is fastened in the inlet 12.
  • the hub 23 also contains an axial flushing channel 32, which leads to the bearing 27. The leakage flow through the flushing channel 32 causes the gap 25c between the axis 60 and the pump wheel 22 to be continuously flushed in order to avoid thrombus formation.
  • 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 around order area 24b, which follows the transition part 13 of the pump housing at a short distance. Subsequently, 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 the end which faces the pump wheel 22. The outer diameter of the diagonal pump 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 causes a slowdown in blood flow and thus an increase in pressure.
  • the cross-sectional area of the ring channel 35 is widened by correspondingly changing the wall thicknesses 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 screw-shaped. As a result, blood is sucked axially from the suction side 40 and conveyed to the pressure side 41 and from there and with a rotating peripheral component into the annular channel 25.
  • the impeller 22 is provided with an axle 60 which at one end in the bearing 27 of the cap 26 closing the motor housing 15 and at the other end in the Arm star 29 is mounted via a radial bearing 63.
  • the annular longitudinal channel 32 of the hub 23 is bridged by webs 61 which hold the hub 23 on the axis 60.
  • auxiliary blades 62 At the end of the hub 23 facing the motor there are auxiliary blades 62 which pump the liquid flowing in through the longitudinal channel 32 radially outwards and feed them to the main flow generated by the pump blades 24.
  • the auxiliary blades ensure that the gap between the impeller 22 and the motor housing 15 is continuously flowed through, so that thrombi cannot form there.
  • the longitudinal channel 32 is dimensioned such that the blood flow passing through it is significantly less than the main flow generated by the pump blades 24.
  • the bearings 27 and 63 are arranged such that they are at a sufficient distance from the channel 32. Although the transition between the stationary and the rotating part of the bearings 27 and 63 is integral - without a large abutting edge - on which thrombi could attach, it must be assumed that small ring thrombi may form at the transition point. If these do not close the channel 32 at a corresponding distance, then a degressive thrombus growth can be achieved due to adequate flushing with a ultimately stable size.

Landscapes

  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Cardiology (AREA)
  • Biomedical Technology (AREA)
  • Anesthesiology (AREA)
  • Mechanical Engineering (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)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

La pompe à sang comporte un canal (32) creusé au centre du rotor (22) de la pompe, qui relie la partie postérieure dudit rotor (22) au côté d'aspiration (40). Le sang pompé circule en permanence dans le canal (32), ce qui empêche la formation de zones mortes dans les endroits non pourvus de pales du rotor (22). La partie postérieure du rotor (22) comporte des pales auxiliaires (62) qui créent un flux parallèle au flux principal.
PCT/EP1997/002903 1996-06-29 1997-06-04 Pompe a sang realisee selon le principe de la pompe rotative WO1998000185A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19626224A DE19626224A1 (de) 1996-06-29 1996-06-29 Blutpumpe nach dem Rotationspumpenprinzip
DE19626224.0 1996-06-29

Publications (1)

Publication Number Publication Date
WO1998000185A1 true WO1998000185A1 (fr) 1998-01-08

Family

ID=7798456

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/002903 WO1998000185A1 (fr) 1996-06-29 1997-06-04 Pompe a sang realisee selon le principe de la pompe rotative

Country Status (2)

Country Link
DE (1) DE19626224A1 (fr)
WO (1) WO1998000185A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6984201B2 (en) 2000-09-23 2006-01-10 Harefield Cardiac Limited Blood circulation assistance device
EP3165782A1 (fr) 2015-11-04 2017-05-10 Heraeus Deutschland GmbH & Co. KG Support en cermet, en particulier pour un appareil medical implantable
WO2021113389A1 (fr) * 2019-12-03 2021-06-10 Procyrion, Inc. Pompes à sang
US11235138B2 (en) 2015-09-25 2022-02-01 Procyrion, Inc. Non-occluding intravascular blood pump providing reduced hemolysis
US11241569B2 (en) 2004-08-13 2022-02-08 Procyrion, Inc. Method and apparatus for long-term assisting a left ventricle to pump blood
US11351359B2 (en) 2019-12-13 2022-06-07 Procyrion, Inc. Support structures for intravascular blood pumps
CN116870356A (zh) * 2023-06-28 2023-10-13 安徽通灵仿生科技有限公司 一种导管泵组件及其控制系统

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29821565U1 (de) * 1998-12-02 2000-06-15 Impella Cardiotechnik AG, 52074 Aachen Lagerlose Blutpumpe
EP1013294B1 (fr) * 1998-12-16 2007-04-18 Levitronix LLC Pompe à flux diagonal
US7022100B1 (en) 1999-09-03 2006-04-04 A-Med Systems, Inc. Guidable intravascular blood pump and related methods
WO2001072351A2 (fr) * 2000-03-27 2001-10-04 The Cleveland Clinic Foundation Roue secondaire de systeme d'assistance ventriculaire
DE102017210883A1 (de) * 2017-06-28 2019-01-03 Robert Bosch Gmbh Rotoreinheit für ein Herzunterstützungssystem sowie Verfahren und Vorrichtung zum Herstellen einer Rotoreinheit für ein Herzunterstützungssystem
JP7212758B2 (ja) 2018-07-24 2023-01-25 カーディアックアシスト・インコーポレイテッド 遠心血液ポンプ
DE102020117818A1 (de) * 2020-07-07 2022-01-13 Resuscitec Gmbh Blutpumpe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0560466A2 (fr) * 1989-03-06 1993-09-15 St. Jude Medical, Inc. Pompe à sang centrifuge et système d'entraînement
WO1994003731A1 (fr) * 1992-07-30 1994-02-17 Spin Corporation Pompe a sang centrifuge
EP0611580A2 (fr) * 1993-02-18 1994-08-24 AGENCY OF INDUSTRIAL SCIENCE & TECHNOLOGY MINISTRY OF INTERNATIONAL TRADE & INDUSTRY Pompe cardiaque artificielle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0560466A2 (fr) * 1989-03-06 1993-09-15 St. Jude Medical, Inc. Pompe à sang centrifuge et système d'entraînement
WO1994003731A1 (fr) * 1992-07-30 1994-02-17 Spin Corporation Pompe a sang centrifuge
EP0611580A2 (fr) * 1993-02-18 1994-08-24 AGENCY OF INDUSTRIAL SCIENCE & TECHNOLOGY MINISTRY OF INTERNATIONAL TRADE & INDUSTRY Pompe cardiaque artificielle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
YOSHINARI WAKISAKA ET AL: "IMPROVEMENT IN ANTITHROMBOGENICITY IN A CENTRIFUGAL PUMP WITH SELF WASH-OUT STRUCTURE FOR LONGTERM USE", ASAIO JOURNAL, vol. 41, no. 3, 1 July 1995 (1995-07-01), pages 350 - 355, XP000542912 *

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6984201B2 (en) 2000-09-23 2006-01-10 Harefield Cardiac Limited Blood circulation assistance device
US11241569B2 (en) 2004-08-13 2022-02-08 Procyrion, Inc. Method and apparatus for long-term assisting a left ventricle to pump blood
US11642511B2 (en) 2004-08-13 2023-05-09 Procyrion, Inc. Method and apparatus for long-term assisting a left ventricle to pump blood
US12078192B2 (en) 2015-09-25 2024-09-03 Procyrion, Inc. Non-occluding intra vascular blood pump providing reduced hemolysis
US11235138B2 (en) 2015-09-25 2022-02-01 Procyrion, Inc. Non-occluding intravascular blood pump providing reduced hemolysis
EP3165782A1 (fr) 2015-11-04 2017-05-10 Heraeus Deutschland GmbH & Co. KG Support en cermet, en particulier pour un appareil medical implantable
US10156256B2 (en) 2015-11-04 2018-12-18 Heraeus Deutschland GmbH & Co. KG Cermet bearing, in particular for an implantable medical device
US11517736B2 (en) 2019-12-03 2022-12-06 Procyrion, Inc. Blood pumps
US11857777B2 (en) 2019-12-03 2024-01-02 Procyrion, Inc. Blood pumps
JP7709438B2 (ja) 2019-12-03 2025-07-16 プロシリオン インコーポレイテッド 血液ポンプ
US12161854B2 (en) 2019-12-03 2024-12-10 Procyrion, Inc. Blood pumps
US11452859B2 (en) 2019-12-03 2022-09-27 Procyrion, Inc. Blood pumps
JP2023505211A (ja) * 2019-12-03 2023-02-08 プロシリオン インコーポレイテッド 血液ポンプ
US11324940B2 (en) 2019-12-03 2022-05-10 Procyrion, Inc. Blood pumps
WO2021113389A1 (fr) * 2019-12-03 2021-06-10 Procyrion, Inc. Pompes à sang
US11779751B2 (en) 2019-12-03 2023-10-10 Procyrion, Inc. Blood pumps
US11571559B2 (en) 2019-12-13 2023-02-07 Procyrion, Inc. Support structures for intravascular blood pumps
US12017060B2 (en) 2019-12-13 2024-06-25 Procyrion, Inc. Support structures for intravascular blood pumps
US11697017B2 (en) 2019-12-13 2023-07-11 Procyrion, Inc. Support structures for intravascular blood pumps
US11351359B2 (en) 2019-12-13 2022-06-07 Procyrion, Inc. Support structures for intravascular blood pumps
US11471665B2 (en) 2019-12-13 2022-10-18 Procyrion, Inc. Support structures for intravascular blood pumps
CN116870356A (zh) * 2023-06-28 2023-10-13 安徽通灵仿生科技有限公司 一种导管泵组件及其控制系统

Also Published As

Publication number Publication date
DE19626224A1 (de) 1998-01-02

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