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    • 4. 发明公开
    • VENTRICULAR ASSIST DEVICE CONTROL
    • EP3854446A1
    • 2021-07-28
    • EP21162215.4
    • 2017-10-16
    • Abiomed Europe GmbH
    • SIESS, ThorstenABOULHOSN, WalidNIX, ChristophLUNZE, Katrin
    • A61M60/00A61M60/13A61M60/531A61M60/221
    • A control device (100) for a ventricular assist device, VAD (50), with settable speed levels, the control device (100) comprising an input (101) configured to receive at least one measuring signal (LVP meas ) related to a physiological condition of the circulatory system of a patient (P) receiving heart assistance by the VAD (50), wherein the control device (100) is configured to derive an actual value (EDLVP; FG) of at least one characteristic parameter of the heart (H) from one or more of the at least one measuring signal (LVP meas ) and to provide a refined actual value (EDLVP*; FG*) of the at least one characteristic parameter in which effects of physiologically caused fluctuations are eliminated or reduced; and an output (105) configured to output an updated setting value (n VAD set ) for the speed level, wherein the control device (100) is configured to produce the updated setting value (n VAD set ) based on the refined actual value (EDLVP*; FG*) and a predeterminable set-point value (EDLVP set ; FG set ). A VAD (50) for assistance of a heart, comprising the control device (100), wherein the VAD (50) is preferably a non-pulsatile rotational blood pump, wherein further preferably the blood pump is catheter-based. A method for obtaining a refined actual value of at least one characteristic parameter of the heart (H), the method comprising receiving at least one measuring signal (LVP meas ) related to a physiological condition of the circulatory system of a patient (P); deriving an actual value (EDLVP; FG) of at least one characteristic parameter of the heart (H) from one or more of the at least one measuring signal (LVP meas ); processing the actual value (EDLVP; FG) or the one or more of the at least one measuring signal (LVP meas ) to provide the refined actual value (EDLVP*; FG*) in which physiologically caused fluctuations are eliminated or reduced. A method for controlling the speed level of a ventricular assist device, VAD (50), with settable speed levels, the method comprising obtaining the refined actual value of at least one characteristic parameter of the heart (H); and producing an updated setting value (n VAD set ) for the speed level based on the refined actual value (EDLVP*; FG*) and a predeterminable set-point value (EDLVP set ).
    • 10. 发明公开
    • BLOOD PUMP
    • EP3821938A1
    • 2021-05-19
    • EP20206855.7
    • 2015-03-18
    • Abiomed Europe GmbH
    • SIESS, ThorstenABOULHOSN, Walid
    • A61M60/00
    • A blood pump (1) comprises a pump casing (2) having a blood flow inlet (5) and a blood flow outlet (6) connected by a passage (7), and an impeller (3) arranged in said pump casing (2) so as to be rotatable about an axis of rotation (9). The impeller (2) is provided with blades (4) sized and shaped for conveying blood along the passage (7) from the blood flow inlet (5) to the blood flow outlet (6), the impeller (3) being rotatably supported in the pump casing (2) by at least one bearing (10, 20). A surface of the impeller (3) faces a surface of the pump casing (2) spaced from said surface of the impeller (3) by a clearance (31), the clearance (31) being in fluid connection with the passage (7) at a clearance transition point (36). In order to wash out the clearance, at least one wash out channel (30) extends through the impeller (3) and is in fluid connection with the passage (7) via a first opening (34) and with the clearance (31) via a second opening (35). The first opening (34) of the wash out channel (30) is arranged in an area of the impeller (3) that - during operation of the blood pump (1) - is under a higher pressure than the clearance transition point (36) so as to cause a blood flow from the first opening (34) through the wash out channel (30) and the clearance (31) to the clearance transition point (36).