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    HEART RATE DETERMINATION BASED ON VAD CURRENT WAVEFORM
    2.
    发明申请
    HEART RATE DETERMINATION BASED ON VAD CURRENT WAVEFORM 有权

    公开(公告)号：US20180028737A1

    公开(公告)日：2018-02-01

    申请号：US15663265

    申请日：2017-07-28

    Applicant: HeartWare, Inc.

    Inventor： Carlos REYES ,  Fernando CASAS ,  Justin WOLMAN

    IPC: A61M1/12 ,  A61B5/029 ,  A61M1/10

    Abstract: The present disclosure provides for methods and systems for determining heart rate of a patient. Based on motor current signals of a ventricular assist device (VAD), each of first, second and third events in the measured current signal may be detected, the first event being indicative of a rise or fall in the current signal, the second event being indicative of a rise or fall in the current signal in the opposite direction as the first event, and the third event being indicative of a rise or fall in the current signal in the same direction as the first event. A timer counter may be initiated upon detection of the first event, and an elapsed time may be measured upon detection of the third event. Heart rate may be determined based on the elapsed time of the timer counter.

    MULTI-INPUT SPEED RESPONSE ALGORITHM FOR A BLOOD PUMP
    3.
    发明申请
    MULTI-INPUT SPEED RESPONSE ALGORITHM FOR A BLOOD PUMP 审中-公开

    公开(公告)号：US20190307938A1

    公开(公告)日：2019-10-10

    申请号：US16359501

    申请日：2019-03-20

    Applicant: HeartWare, Inc.

    Inventor： Carlos REYES ,  Katherine CHORPENNING ,  Antonio Luiz Silva FERREIRA ,  Neethu Lekshmi VASUDEVAN JALAJA ,  Justin WOLMAN ,  Fernando CASAS

    IPC: A61M1/10 ,  A61M1/12

    Abstract: A method of responding to an adverse event associated with an implantable blood pump including detecting the adverse event, reducing a pump speed of the blood pump relative to a set pump speed in response to the detected adverse event, and determining whether at least one of a group consisting of the adverse event and a second adverse event is present following the reducing of the pump speed of the blood pump. If the at least one of the group consisting of the adverse event and a second adverse event is not present, the method includes increasing the pump speed to the set pump speed and if the at least one of the group consisting of the adverse event and a second adverse event is present while increasing the pump speed to the set pump speed, the method includes reducing the pump speed to a maximum safe operating speed.

    MAP MEASUREMENT ON VAD PATIENTS WITH LOW PULSATILITY
    4.
    发明申请
    MAP MEASUREMENT ON VAD PATIENTS WITH LOW PULSATILITY 审中-公开

    公开(公告)号：US20190054222A1

    公开(公告)日：2019-02-21

    申请号：US15678555

    申请日：2017-08-16

    Applicant: HeartWare, Inc.

    Inventor： Carlos REYES ,  Fernando CASAS

    IPC: A61M1/10 ,  A61M1/12

    CPC classification number: A61M1/1086 ,  A61M1/1005 ,  A61M1/101 ,  A61M1/122 ,  A61M5/14276 ,  A61M5/1723 ,  A61M2205/3334 ,  A61M2205/3365 ,  A61M2205/50 ,  A61M2230/30

    Abstract: A method of operating an implantable blood pump implanted within a heart of a patient comprising measuring at least one from the group consisting of a current drawn by the implantable blood pump and a blood flow from the implantable blood pump during operation; correlating the at least one from the group consisting the current and the blood flow to a systolic arterial pressure and a diastolic arterial pressure; and adjusting a speed of an impeller of the implantable blood pump relative to a predetermined speed to correspond to an increase the at least one from the group consisting the current during a systolic phase of a cardiac cycle and a decrease in the at least one from the group consisting the current and the blood flow during a diastolic phase of the cardiac cycle.

    FIELD-ORIENTED CONTROL FOR CONTROL OF BLOOD PUMP MOTOR
    5.
    发明申请
    FIELD-ORIENTED CONTROL FOR CONTROL OF BLOOD PUMP MOTOR 审中-公开

    公开(公告)号：US20180085507A1

    公开(公告)日：2018-03-29

    申请号：US15710323

    申请日：2017-09-20

    Applicant: HEARTWARE, INC.

    Inventor： Fernando CASAS ,  Carlos REYES ,  Justin WOLMAN

    IPC: A61M1/10 ,  A61M1/12

    CPC classification number: A61M1/1086 ,  A61M1/1008 ,  A61M1/101 ,  A61M1/1036 ,  A61M1/1053 ,  A61M1/122 ,  A61M1/127

    Abstract: A ventricular assist device includes a pump configured to pump blood of a patient. A motor is configured to operate the pump. First, second, and third conductors are coupled to the motor and are configured to supply electric current from a power supply to the motor in first, second, and third phases, respectively. A controller is configured to operate the motor using a Field Oriented Control (FOC) method, and if one from the group consisting of first, second and third conductors becomes unable to supply electric current to the motor, the controller continues to operate the motor using the FOC method using the phases of the two conductors that are able to supply electric current to the motor.

    HEART RATE MEASUREMENT USING BLOOD PUMP IMPELLER LOCATION
    6.
    发明申请
    HEART RATE MEASUREMENT USING BLOOD PUMP IMPELLER LOCATION 审中-公开

    公开(公告)号：US20190184082A1

    公开(公告)日：2019-06-20

    申请号：US16221768

    申请日：2018-12-17

    Applicant: HeartWare, Inc.

    Inventor： Justin WOLMAN ,  Fernando CASAS ,  Carlos REYES

    IPC: A61M1/12 ,  A61M1/10

    CPC classification number: A61M1/12 ,  A61M1/1012 ,  A61M1/1031 ,  A61M1/1086 ,  A61M1/122 ,  A61M2205/3334

    Abstract: A method of determining a heart rate of a patient having an implanted blood pump including applying a voltage to a plurality of coils of a stator of the blood pump to produce an electromagnetic force to rotate a rotor in communication with the plurality of coils; displaying a waveform associated with a back electromotive force in the plurality of coils of the blood pump, the waveform being proportional to an axial position of the rotor relative to the stator; determining a time interval between a first alteration in the waveform relative to a baseline and a second alteration in the waveform relative to the baseline; and determining the heart rate of the patient based on the time interval.

    DYNAMIC HQ FOR CLOSED LOOP CONTROL
    7.
    发明申请
    DYNAMIC HQ FOR CLOSED LOOP CONTROL 审中-公开

    公开(公告)号：US20190111194A1

    公开(公告)日：2019-04-18

    申请号：US16148312

    申请日：2018-10-01

    Applicant: HeartWare, Inc.

    Inventor： Carlos REYES ,  Fernando CASAS

    IPC: A61M1/10 ,  A61M1/12

    Abstract: A method of controlling a blood pump having a predefined hydraulic performance including at least from the group consisting of estimating and measuring an instantaneous flow rate during operation of the blood pump at a predetermined rotational speed of an impeller of the blood pump, the instantaneous flow rate including a plurality of flow rate data points. The plurality of flow rate data points define a trajectory around at least one from the group consisting of an operational point of a predefined pressure-flow curve associated with the predetermined rotational speed of the impeller of the blood pump and a target operational point of a target pressure-flow curve different than the predefined pressure-flow curve. The predetermined rotational speed of the impeller is adjusted until the plurality of flow rate data points define a predetermined trajectory around at least one of the operational point and the target operational point.

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