DE19613565C1 - Intravasal blood pump with drive motor - Google Patents

Intravasal blood pump with drive motor

Info

Publication number
DE19613565C1
DE19613565C1 DE19613565A DE19613565A DE19613565C1 DE 19613565 C1 DE19613565 C1 DE 19613565C1 DE 19613565 A DE19613565 A DE 19613565A DE 19613565 A DE19613565 A DE 19613565A DE 19613565 C1 DE19613565 C1 DE 19613565C1
Authority
DE
Germany
Prior art keywords
pump
blood pump
blood
intravascular blood
pump housing
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 - Lifetime
Application number
DE19613565A
Other languages
German (de)
Inventor
Guenter Prof Dr Rau
Helmut Prof Dr Ing Reul
Thorsten Dipl Ing Sies
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19613565A priority Critical patent/DE19613565C1/en
Priority to JP53581797A priority patent/JP2001515375A/en
Priority to US08/832,040 priority patent/US5911685A/en
Priority to CA002250993A priority patent/CA2250993A1/en
Priority to PCT/EP1997/001660 priority patent/WO1997037697A1/en
Priority to EP97919314A priority patent/EP0929327A1/en
Priority to US08/881,885 priority patent/US5921913A/en
Application granted granted Critical
Publication of DE19613565C1 publication Critical patent/DE19613565C1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • A61M60/80—Constructional details other than related to driving
    • A61M60/802—Constructional details other than related to driving of non-positive displacement blood pumps
    • A61M60/833—Occluders for preventing backflow
    • 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
    • A61M60/20—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
    • A61M60/855—Constructional details other than related to driving of implantable pumps or pumping devices
    • A61M60/857—Implantable blood tubes
    • 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
    • A61M60/861—Connections or anchorings for connecting or anchoring pumps or pumping devices to parts of 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
    • A61M25/00—Catheters; Hollow probes
    • 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

Abstract

The blood pump comprises a drive part (11), containing a motor (14), connected to a pump part (12) which has a tubular housing (15) and a rotary impeller (17). A blocking device (20) widens the flow path outside the pump housing. The drive part has a centring device (23) protruding from the periphery of the motor. A suction hose (25) leads into the pump housing and encloses the blocking device, the pump housing and-or the suction hose.

Description

Die Erfindung geht aus von einer intraversalen Blutpumpe mit einem einen Motor enthaltenden Antriebsteil und einem damit fest verbundenen Pumpenteil, wobei der Pumpenteil ein rohrförmiges Gehäuse und ein darin drehbar angeordnetes Flügelrad aufweist.The invention is based on an intraversal blood pump a drive part containing a motor and a pump part firmly connected thereto, the Pump part a tubular housing and a has rotatably arranged impeller.

Eine solche Pumpe ist aus der Zeitschrift "The international Journal of Artificial Organs", Band 18, Nr. 5 (1995), Seiten 273 bis 285, bekannt. Sie wird durch Punktion eines Blutgefäßes in das Gefäßsystem des Körpers eingeführt umd zum Herzen oder an eine andere Stelle, an der Blut gepumpt werden soll, vorgeschoben.Such a pump is from the magazine "The international Journal of Artificial Organs ", Volume 18, No. 5 (1995), pages 273 to 285. she is punctured by a Blood vessel inserted into the body's vascular system and to the heart or to another place on the blood to be pumped.

Aus der US 4 969 865, der EP 0 157 871 B1 und der EP 0 397 668 B1 sind weitere intravasale Blutpumpen bekannt, bei denen jedoch nur der Pumpenteil in der Blutbahn vorgeschoben wird, während der Antriebs­ teil extrakorporal angeordnet und mit dem Pumpenteil über eine flexible Welle verbunden ist.US Pat. No. 4,969,865, EP 0 157 871 B1 and EP 0 397 668 B1 are further intravascular ones Blood pumps known, in which, however, only the pump part in the bloodstream is advanced during the drive  partly arranged extracorporeally and with the pump part is connected via a flexible shaft.

Aus EP 0 157 859 B1 ist eine Blutpumpe bekannt, bei der der Antriebsteil und der Pumpenteil baulich vereinigt sind. Diese Pumpe ist implantierbar, jedoch handelt es sich nicht um eine intravasale Blutpumpe, die minimal­ invasiv in den Körper eingeführt werden kann.A blood pump is known from EP 0 157 859 B1, in which the drive part and the pump part are structurally combined are. This pump is implantable, but it does is not an intravascular blood pump that is minimal can be introduced invasively into the body.

Intravasale Blutpumpen müssen einen Außendurchmesser haben, der hinreichend klein ist, um ein Blutgefäß nicht zu verstopfen. Der größte zulässige Außendurch­ messer liegt in der Größenordnung von etwa 7 mm. Wenn der Antriebsteil in der Nähe des Pumpenteils angeordnet ist, ist wegen der baulichen Restriktionen die Leistung des Antriebsteils begrenzt. Es ist daher wichtig, die Pumpenleistung voll auszunutzen und Leistungs- und Strömungsverluste zu minimieren.Intravascular blood pumps must have an outside diameter that is sufficiently small to hold a blood vessel not to clog. The largest permissible outside diameter knife is on the order of about 7 mm. If the drive part is arranged in the vicinity of the pump part is due to the structural restrictions of the drive part limited. It is therefore important that To fully utilize pump performance and performance and To minimize flow losses.

Gemäß der DE 37 05 697 A1 ist es möglich, mittels ringförmiger Ballons Strömungswege längs eines Katheters zu sperren.According to DE 37 05 697 A1, it is possible to use ring-shaped Block balloons flow paths along a catheter.

Der Erfindung liegt die Aufgabe zugrunde, eine intravasale Blutpumpe zu schaffen, die mit hohem Wirkungsgrad im Innern eines Blutgefäßes eingesetzt werden kann, insbesondere auch außerhalb der Aorta.The invention has for its object an intravascular To create blood pump with high efficiency can be used inside a blood vessel, in particular also outside the aorta.

Diese Aufgabe wird mit dem Gegenstand des Anspruchs 1 gelöst.This task is the subject of Claim 1 solved.

Bei dieser intravasalen Blutpumpe ist der Antriebsteil mit dem Pumpenteil zu einer baulichen Einheit vereinigt. Dies bedeutet, daß beide Teile ge­ meinsam in das Blutgefäß eingeführt werden. Die Blut­ pumpe wird vor dem jeweiligen Organ in einem organver­ sorgenden Gefäß derart plaziert, daß der Pumpenteil mit zentraler Ansaugöffnung in Durchströmrichtung dem An­ triebsteil vorgelagert ist. Am Pumpenteil ist eine Sperrvorrichtung vorgesehen, die einen Strömungskurz­ schluß entlang der Außenseite des Pumpengehäuses ver­ hindert. Auf diese Weise wird vermieden, daß Fluid/Blut von der Ausgangsseite der Pumpe am Pumpengehäuse vorbei zur Einlaßseite gelangt. Das gesamte angesaugte Blut wird in Strömungsrichtung an dem Antriebsteil vorbei­ gefördert.With this intravascular blood pump the drive part with the pump part to a structural Unity united. This means that both parts are ge be introduced together into the blood vessel. The blood pump is placed in front of the respective organ in an organver care vessel placed so that the pump part with central intake opening in the flow direction to the on  drive part is upstream. There is one on the pump part Blocking device provided that a flow short ver along the outside of the pump housing prevents. In this way it is avoided that fluid / blood past the pump housing from the outlet side of the pump reaches the inlet side. All the blood drawn is past the drive part in the direction of flow promoted.

Die Verwendung der beanspruchten Pumpe ist somit nicht auf eine Einführung in die Aorta beschränkt, wo die Aortenklappe als Absperrvorrichtung wirken kann.The use of the claimed pump is thus not limited to an introduction to the aorta, where the aortic valve acts as a shut-off device can.

Die Gefahr, daß sich die Pumpe am Gefäß festsaugt, wird aufgrund der zentral im Gefäß liegenden Ansaugöffnung minimiert. Da der gesamte Blutstrom an dem Antriebsteil entlangströmt, ist gewährleistet, daß der durch die Pumpe aufgebaute Druck das elastische Gefäß selbst dann offenhält, wenn der Gefäßdurchmesser nahezu demjenigen des Pumpenteils bzw. des Antriebsteils entspricht. Die Abströmung zwischen Motor und Gefäß stellt zudem den Abtransport der im Antrieb erzeugten Wärme sicher, ohne daß es zu Blutschädigung durch zu hohe Oberflächentem­ peraturen (über 41°C) kommt. Zweckmäßigerweise ist eine von dem Umfang des Antriebsteils abstehende Zen­ triervorrichtung vorgesehen, die einerseits den Ab­ strömkanal offenhält und andererseits den Antriebsteil im Blutgefäß zentriert. Ferner verhindert die Zentrier­ vorrichtung zusammen mit der Sperrvorrichtung ein Dre­ hen und axiales Wandern der gesamten Pumpe im Blutge­ fäß.There is a risk that the pump will get stuck to the vessel due to the suction opening located centrally in the vessel minimized. Because the entire blood flow to the drive part flows along, it is ensured that the through the Pump pressure built up the elastic vessel even then keeps open if the vessel diameter is almost that corresponds to the pump part or the drive part. The Outflow between the engine and the vessel also represents the Removal of the heat generated in the drive safely, without that there is blood damage due to excessive surface temperature temperatures (over 41 ° C). It is expedient a zen protruding from the periphery of the drive member Triervorrichtung provided that the one hand the Ab keeps the flow channel open and on the other hand the drive part centered in the blood vessel. Furthermore, the centering prevents device together with the locking device a Dre and axial migration of the entire pump in the blood barrel.

Im folgenden werden unter Bezugnahme auf die Zeichnun­ gen Ausführungsbeispiele der Erfindung näher erläutert.In the following with reference to the drawing gene embodiments of the invention explained in more detail.

Es zeigen: Show it:  

Fig. 1 eine schematische Darstellung der intravasalen Blutpumpe im Innern eines Blutgefäßes und Fig. 1 is a schematic representation of the intravascular blood pump inside a blood vessel and

Fig. 2 ein zweites Ausführungsbeispiel der Blutpumpe im Innern eines Blutgefäßes. Fig. 2 shows a second embodiment of the blood pump inside a blood vessel.

In Fig. 1 ist die Blutpumpe im Innern eines Blutgefäßes 10, z. B. einer Arterie, angeordnet. Die Blutpumpe weist einen Antriebsteil 11 und einen Pumpenteil 12 auf, die fest miteinander verbunden sind, jedoch einen axialen Abstand haben. Der Antriebsteil 11 enthält einen An­ triebsmotor. Er ist an seinem rückwärtigen Ende mit einem Katheter 13 verbunden, durch den die Versorgungs- und Steuerleitungen für den Motor 14 hindurchführen.In Fig. 1, the blood pump inside a blood vessel 10 , for. B. an artery. The blood pump has a drive part 11 and a pump part 12 , which are firmly connected to one another, but have an axial distance. The drive part 11 contains a drive motor. It is connected at its rear end to a catheter 13 through which the supply and control lines for the motor 14 pass.

Der Pumpenteil 12 weist ein rohrförmiges Pumpengehäuse 15 auf, das koaxial zu dem Rotor angeordnet ist und an seinem einen Ende eine Ansaugöffnung 16 bildet. In dem Pumpengehäuse 15 ist ein Flügelrad 17 drehbar, das eine sich in Strömungsrichtung erweiternde Nabe 18 und davon radial abstehende Flügel 19 aufweist. Die Nabe 18 sitzt entweder auf der Ausgangswelle des Motors 14 oder sie ist frei drehbar gelagert und mit der Ausgangswelle des Motors über eine Magnetkupplung gekuppelt.The pump part 12 has a tubular pump housing 15 , which is arranged coaxially with the rotor and forms a suction opening 16 at one end. An impeller 17 can be rotated in the pump housing 15 , which has a hub 18 which widens in the flow direction and vanes 19 projecting radially therefrom. The hub 18 either sits on the output shaft of the motor 14 or it is freely rotatable and coupled to the output shaft of the motor via a magnetic coupling.

Der Motor 14 und das Pumpengehäuse 15 haben etwa glei­ chen Durchmesser. Dieser Durchmesser liegt im Bereich von 5 bis 8 mm, so daß die Blutpumpe das Blutgefäß 10 nicht verstopft. Die das Pumpengehäuse 15 verlassende Blutströmung strömt anschließend an der Außenseite des Motors 14 entlang.The motor 14 and the pump housing 15 have approximately the same diameter. This diameter is in the range from 5 to 8 mm, so that the blood pump does not block the blood vessel 10 . The blood flow leaving the pump housing 15 then flows along the outside of the motor 14 .

An der Außenseite des Pumpengehäuses 15 ist eine auf­ weitbare Sperrvorrichtung 20 befestigt, die aus einem flexiblen Dichtschirm besteht, der generell kegel­ stumpfförmig ausgebildet ist und mit seinem kleineren Ende am Pumpengehäuse angebracht ist, während das grö­ ßere Ende aufklappen und sich gegen die Wand des Blut­ gefäßes 10 legen oder auch zusammenklappen und sich außen an das Pumpengehäuse 15 anlegen kann. Der die Sperrvorrichtung 20 bildende flexible Dichtschirm wirkt nach Art einer Rückschlagklappe. Wenn der Druck im Be­ reich 21 vor der Ansaugöffnung 16 kleiner ist als der Druck am Pumpenauslaß, spannt sich der Dichtschirm auf und verschließt den Ringraum zwischen Pumpengehäuse und Gefäßwand. Dadurch wird verhindert, daß Blut von der Auslaßseite 22 der Pumpe zur Einlaßseite 21 zurück­ strömt. Der gesamte Blutstrom wird also gezwungen, an dem Motor 14 entlangzufließen.On the outside of the pump housing 15 is attached to an expandable locking device 20 , which consists of a flexible sealing screen which is generally frusto-conical and is attached to the pump housing with its smaller end, while the larger end opens up and against the wall of blood place the vessel 10 or fold it up and put it on the outside of the pump housing 15 . The flexible sealing screen forming the blocking device 20 acts like a check valve. If the pressure in the loading area 21 in front of the suction opening 16 is less than the pressure at the pump outlet, the sealing screen spans and closes the annular space between the pump housing and the vessel wall. This prevents blood from flowing back from the outlet side 22 of the pump to the inlet side 21 . The entire blood flow is thus forced to flow along the motor 14 .

Zur Stabilisierung der Zentralposition des Antriebs­ teils 11 im Innern des Blutgefäßes 10 ist der Antriebs­ teil 11 mit einer von seinem Umfang abstehenden Zen­ triervorrichtung 23 in Form abstehender, sich nach au­ ßen verjüngender federartiger Rippen versehen.To stabilize the central position of the drive part 11 in the interior of the blood vessel 10 , the drive part 11 is provided with a protruding from its circumference Zen trier device 23 in the form of protruding, outwardly tapering spring-like ribs.

Bei dem Ausführungsbeispiel von Fig. 2 ist an dem Pum­ pengehäuse 15 ein nach vorne abstehender Ansaugschlauch 25 befestigt, der mittig in das Blutgefäß hinein vor­ steht und an seinem Ende Öffnungen für den Bluteintritt aufweist. Der Ansaugschlauch 25 ist abdichtend mit dem zylindrischen Pumpengehäuse 15 verbunden und verlängert dieses nach vorne.In the embodiment of Fig. 2, a forwardly protruding suction hose 25 is attached to the pump housing 15 , which stands centrally in the blood vessel and has openings for the entry of blood at its end. The suction hose 25 is sealingly connected to the cylindrical pump housing 15 and extends it forward.

Die Sperrvorrichtung 20a besteht in Fig. 2 aus einem ringförmigen Ballon, der an dem Pumpengehäuse 15 oder am Ansaugschlauch 25 befestigt ist. Dieser Ballon ist mit einem Lumen des Katheters 13 verbunden, so daß er extrakorporal mit Gas oder Flüssigkeit aufgeblasen wer­ den kann. Der Ballon bewirkt eine Verhinderung des Rückströmens von Blut und eine Zentrierung von Pumpen­ teil 12 und Ansaugschlauch 25 im Blutgefäß.The locking device 20 a in Fig. 2 consists of an annular balloon which is attached to the pump housing 15 or the suction hose 25 . This balloon is connected to a lumen of the catheter 13 so that it can be inflated extracorporeally with gas or liquid. The balloon prevents the backflow of blood and a centering of the pump part 12 and suction hose 25 in the blood vessel.

Claims (7)

1. Intravasale Blutpumpe mit einem einen Motor (14) enthaltenden Antriebsteil (11) und einem damit fest verbundenen Pumpenteil (12), wobei der Pum­ penteil (12) ein rohrförmiges Pumpengehäuse (15) und ein darin drehbar angeordnetes Flügelrad (17) aufweist, und mit einer den Strömungsweg außerhalb des Pumpengehäuses (15) versperrenden aufweitbaren Sperrvorrichtung (20; 20a).1. intravascular blood pump having a a motor (14) containing the drive member (11) and a fixedly connected thereto pump part (12), said Pum (12) penteil a tubular pump housing (15) and a therein rotatably mounted impeller (17), and with an expandable blocking device ( 20; 20 a) blocking the flow path outside the pump housing ( 15 ). 2. Intravasale Blutpumpe nach Anspruch 1, dadurch gekennzeichnet, daß der Antriebsteil (11) eine von dem Umfang des Motors (14) abstehende Zentriervor­ richtung (23) aufweist.2. Intravascular blood pump according to claim 1, characterized in that the drive part ( 11 ) from the circumference of the motor ( 14 ) projecting Zentriervor direction ( 23 ). 3. Intravasale Blutpumpe nach Anspruch 1 oder 2, da­ durch gekennzeichnet, daß die Sperrvorrichtung (20; 20a) an dem Pumpengehäuse (15) angebracht ist.3. Intravascular blood pump according to claim 1 or 2, characterized in that the locking device ( 20 ; 20 a) is attached to the pump housing ( 15 ). 4. Intravasale Blutpumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß in das Pumpengehäu­ se (15) ein Ansaugschlauch (25) hineinführt und die Sperrvorrichtung (20a) das Pumpengehäuse (15) und/oder den Ansaugschlauch (25) umgibt.4. Intravascular blood pump according to one of claims 1 to 3, characterized in that in the Pumpengehäu se ( 15 ) leads a suction hose ( 25 ) and the locking device ( 20 a) surrounds the pump housing ( 15 ) and / or the suction hose ( 25 ) . 5. Intravasale Blutpumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Sperrvorrich­ tung (20a) aus einem ringförmigen Ballon besteht.5. Intravascular blood pump according to one of claims 1 to 4, characterized in that the Sperrvorrich device ( 20 a) consists of an annular balloon. 6. Intravasale Blutpumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Sperrvorrich­ tung (20) aus einem nach Art einer Rückschlagklap­ pe wirkenden flexiblen Dichtschirm besteht.6. Intravascular blood pump according to one of claims 1 to 4, characterized in that the Sperrvorrich device ( 20 ) consists of a pe in the manner of a Rückschlagklap acting flexible sealing screen. 7. Intravasale Blutpumpe nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Sperrvorrich­ tung (20; 20a) eine Fixierfunktion für den Pumpen­ teil (12) in radialer und axialer Richtung sowie in Umfangsrichtung ausübt.7. Intravascular blood pump according to one of claims 1 to 6, characterized in that the Sperrvorrich device ( 20 ; 20 a) performs a fixing function for the pump part ( 12 ) in the radial and axial directions and in the circumferential direction.
DE19613565A 1996-04-03 1996-04-04 Intravasal blood pump with drive motor Expired - Lifetime DE19613565C1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE19613565A DE19613565C1 (en) 1996-04-04 1996-04-04 Intravasal blood pump with drive motor
JP53581797A JP2001515375A (en) 1996-04-04 1997-04-02 Intravascular blood pump
US08/832,040 US5911685A (en) 1996-04-03 1997-04-02 Method and apparatus for cardiac blood flow assistance
CA002250993A CA2250993A1 (en) 1996-04-04 1997-04-02 Intravascular blood pump
PCT/EP1997/001660 WO1997037697A1 (en) 1996-04-04 1997-04-02 Intravascular blood pump
EP97919314A EP0929327A1 (en) 1996-04-04 1997-04-02 Intravascular blood pump
US08/881,885 US5921913A (en) 1996-04-03 1997-06-24 Statorless intravascular microaxial flow pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19613565A DE19613565C1 (en) 1996-04-04 1996-04-04 Intravasal blood pump with drive motor

Publications (1)

Publication Number Publication Date
DE19613565C1 true DE19613565C1 (en) 1997-07-24

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ID=7790514

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19613565A Expired - Lifetime DE19613565C1 (en) 1996-04-03 1996-04-04 Intravasal blood pump with drive motor

Country Status (5)

Country Link
EP (1) EP0929327A1 (en)
JP (1) JP2001515375A (en)
CA (1) CA2250993A1 (en)
DE (1) DE19613565C1 (en)
WO (1) WO1997037697A1 (en)

Cited By (15)

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WO2000045874A1 (en) * 1999-02-06 2000-08-10 Impella Cardiotechnik Ag Device for intravascular cardiac valve surgery
DE10040403A1 (en) * 2000-08-18 2002-02-28 Impella Cardiotech Ag Intracardiac blood pump
EP1996252A2 (en) * 2006-03-23 2008-12-03 The Penn State Research Foundation Heart assist device with expandable impeller pump
US8684904B2 (en) 2009-07-01 2014-04-01 Thoratec Corporation Blood pump with expandable cannula
US8721517B2 (en) 2012-05-14 2014-05-13 Thoratec Corporation Impeller for catheter pump
US8992163B2 (en) 2004-09-17 2015-03-31 Thoratec Corporation Expandable impeller pump
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EP0929327A1 (en) 1999-07-21
WO1997037697A1 (en) 1997-10-16
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JP2001515375A (en) 2001-09-18

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