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NZ768943B2 - Intravascular blood pump with ceramic inner sleeve - Google Patents
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NZ768943B2 - Intravascular blood pump with ceramic inner sleeve - Google Patents

Intravascular blood pump with ceramic inner sleeve

Info

Publication number
NZ768943B2
NZ768943B2 NZ768943A NZ76894319A NZ768943B2 NZ 768943 B2 NZ768943 B2 NZ 768943B2 NZ 768943 A NZ768943 A NZ 768943A NZ 76894319 A NZ76894319 A NZ 76894319A NZ 768943 B2 NZ768943 B2 NZ 768943B2
Authority
NZ
New Zealand
Prior art keywords
blood pump
inner sleeve
cavity
rotor
impeller
Prior art date
Application number
NZ768943A
Other versions
NZ768943A (en
Inventor
Wolfgang Kerkhoffs
Thorsten Siess
Original Assignee
Abiomed Europe Gmbh
Filing date
Publication date
Priority claimed from EP18163761.2A external-priority patent/EP3542836A1/en
Application filed by Abiomed Europe Gmbh filed Critical Abiomed Europe Gmbh
Publication of NZ768943A publication Critical patent/NZ768943A/en
Publication of NZ768943B2 publication Critical patent/NZ768943B2/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L33/00—Antithrombogenic treatment of surgical articles, e.g. sutures, catheters, prostheses, or of articles for the manipulation or conditioning of blood; Materials for such treatment
    • A61L33/02—Use of inorganic 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
    • A61M2205/02—General characteristics of the apparatus characterised by a particular materials
    • A61M2205/0211—Ceramics
    • 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
    • A61M2205/0272—Electro-active or magneto-active materials
    • A61M2205/0283—Electro-active polymers [EAP]
    • 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
    • A61M2207/00—Methods of manufacture, assembly or production
    • 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
    • A61M60/13—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 by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system
    • 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
    • A61M60/135—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 inside a blood vessel, e.g. using grafting
    • 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
    • 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
    • A61M60/17—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart inside a ventricle, e.g. intraventricular balloon pumps
    • A61M60/174—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart inside a ventricle, e.g. intraventricular balloon pumps discharging the blood to the ventricle or arterial system via a cannula internal to the ventricle or arterial system
    • 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
    • A61M60/20—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
    • 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
    • A61M60/40—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
    • A61M60/40—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
    • A61M60/40—Details relating to driving
    • A61M60/403—Details relating to driving for non-positive displacement blood pumps
    • A61M60/422—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being electromagnetic, e.g. using canned motor 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
    • 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
    • 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
    • A61M60/80—Constructional details other than related to driving
    • A61M60/802—Constructional details other than related to driving of non-positive displacement blood pumps
    • A61M60/827—Sealings between moving parts
    • A61M60/829—Sealings between moving parts having a purge fluid supply
    • 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
    • A61M60/855—Constructional details other than related to driving of implantable pumps or pumping devices
    • A61M60/857—Implantable blood tubes

Abstract

intravascular blood pump for percutaneous insertion into a patient’s blood vessel, comprising a pumping device including an impeller and an electric motor for driving the impeller, the electric motor including a stator and a rotor, the rotor disposed inside a cavity in the pumping device and rotatable about an axis of rotation and coupled to the impeller so as to be able to cause rotation of the impeller, wherein the cavity is formed by an inner sleeve made of a ceramic material, characterized in that the blood pump further comprises an end piece made of a ceramic material and attached to an axial end of the inner sleeve in a fluid tight manner to enclose the cavity. By providing an inner sleeve made of a ceramic material, a fluid tight enclosure of the cavity, in which the rotor is disposed, can be created. The ceramic material is diffusion resistant against the purge fluid. Thus, effective corrosion protection of the stator, in particular electric stator parts like the coil winding, can be achieved. Since the ceramic sleeve rather than the inner surface of the casting compound forms the cavity for the rotor, corrosion protection does not depend on the injection molding process, but the ceramic material of the inner sleeve forms a secure barrier against the purge fluid.

Claims (26)

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:
1. An intravascular blood pump for percutaneous insertion into a patient’s blood vessel, comprising a pumping device including an impeller and an electric motor for driving the impeller, the electric motor including a stator and a rotor, the rotor disposed inside a cavity in the pumping device and rotatable about an axis of rotation and coupled to the impeller so as to be able to cause rotation of the impeller, wherein the cavity is formed by an inner sleeve made of a ceramic material, characterized in that the blood pump further comprises an end piece made of a ceramic material and attached to an axial end of the inner sleeve in a fluid tight manner to enclose the cavity.
2. The blood pump of claim 1, wherein the stator comprises a coil winding arranged on the inner sleeve and configured for generating a magnetic field to cause rotation of the rotor.
3. The blood pump of claim 1 or 2, wherein the end piece includes a bearing rotatably supporting the rotor.
4. The blood pump of any one of claims 1 to 3, wherein the cavity is in fluid communication with a purge line of the blood pump configured to supply a purge fluid into the cavity.
5. The blood pump of any one of claims 1 to 4, wherein the stator is sealed against the cavity in a fluid tight manner by the inner sleeve.
6. The blood pump of any one of claims 1 to 5, wherein electrical connections of the stator are formed at least partially on the inner sleeve.
7. The blood pump of any one of claims 1 to 6, wherein the inner sleeve has a wall thickness of about 40 µm to about 60 µm.
8. The blood pump of any one of claims 1 to 7, wherein the inner sleeve is substantially cylindrical.
9. The blood pump of any one of claims 2 to 8, wherein the stator is fixed outside the inner sleeve by means of a casting compound.
10. The blood pump of any one of claims 1 to 9, further comprising an outer sleeve which forms at least a portion of an outer surface of the pumping device, wherein at least a portion of the stator is disposed in an interspace between the outer sleeve and the inner sleeve.
11. The blood pump of claim 10, wherein the outer sleeve comprises a magnetically conductive material to form a yoke of the electric motor.
12. A method of manufacturing an intravascular blood pump, the blood pump comprising a pumping device including an impeller and an electric motor for driving the impeller, the electric motor including a stator and a rotor, the rotor rotatable about an axis of rotation and coupled to the impeller so as to be able to cause rotation of the impeller, the method comprising the steps of: - providing an inner sleeve made of a ceramic material to form a cavity for receiving the rotor; and - arranging a coil winding on the inner sleeve for generating magnetic field to cause rotation of the rotor, characterized in that the method further comprises the step of attaching an end piece made of a ceramic material to an axial end of the inner sleeve in a fluid tight manner to enclose the cavity.
13. The method of claim 12, wherein the end piece includes a bearing rotatably supporting the rotor.
14. The method of claim 12 or 13, further comprising the step of injection-molding a casting compound around the inner sleeve to encapsulate at least the coil winding arranged on the inner sleeve.
15. The blood pump of claim 2, wherein the magnetic field is a rotating magnetic field.
16. The blood pump of claim 3, wherein the bearing is a journal bearing.
17. The blood pump of claim 2, wherein electrical connections of the coil winding are formed at least partially on the inner sleeve.
18. The blood pump of claim 7, wherein the wall thickness is about 50 µm.
19. The blood pump of claim 9, wherein at least the coil winding of the stator is fixed outside the inner sleeve by means of a casting compound.
20. The blood pump of claim 9 or 19, wherein the casting compound comprises a polymer material.
21. The blood pump of claim 20, wherein the polymer material is a resin.
22. The blood pump of claim 21, wherein the resin is epoxy.
23. The blood pump of claim 11, wherein the outer sleeve comprises a metal or metal alloy.
24. The method of claim 12, wherein the intravascular blood pump is an intravascular blood pump of any one of claims 1 to 11 and 16 to 24.
25. The method of claim 12 or 24, wherein the magnetic field is a rotating magnetic field.
26. The method of claim 13, wherein the bearing is a journal bearing.
NZ768943A 2019-03-20 Intravascular blood pump with ceramic inner sleeve NZ768943B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18163761.2A EP3542836A1 (en) 2018-03-23 2018-03-23 Intravascular blood pump with ceramic inner sleeve
PCT/EP2019/057011 WO2019180104A1 (en) 2018-03-23 2019-03-20 Intravascular blood pump with ceramic inner sleeve

Publications (2)

Publication Number Publication Date
NZ768943A NZ768943A (en) 2025-05-30
NZ768943B2 true NZ768943B2 (en) 2025-09-02

Family

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