公开(公告)号：US20230390547A1

公开(公告)日：2023-12-07

申请号：US18327957

申请日：2023-06-02

申请人： Abiomed, Inc.

发明人： Samuel Brown ,  Qing Tan ,  Mohammed Alwatban

IPC分类号： A61M60/546

CPC分类号： A61M60/546 ,  A61M2205/3334

摘要： Methods and apparatus for estimating maximum flow for a heart pump are described. The method comprises receiving data relating motor current to differential pressure measured for a predetermined speed of a motor of the heart pump, extrapolating based on the received data, a first value for the motor current at which the differential pressure is zero, and determining a maximum flow value through the heart pump at the predetermined speed of the motor of the heart pump based, at least in part, on the first value for the motor current.

公开(公告)号：US20230285740A1

公开(公告)日：2023-09-14

申请号：US18120018

申请日：2023-03-10

申请人： Abiomed, Inc.

发明人： Mohammed Alwatban ,  Ahmad El Katerji ,  Maxim Daschewski ,  Gerd Spanier ,  Andre Chuev ,  Qing Tan ,  Samuel Brown

IPC分类号： A61M60/538 ,  G01F11/00 ,  A61M60/178 ,  A61M60/216 ,  A61M60/422 ,  F04B51/00

CPC分类号： A61M60/538 ,  G01F11/006 ,  A61M60/178 ,  A61M60/216 ,  A61M60/422 ,  F04B51/00

摘要： Methods and apparatus for determining flow through a circulatory support device are provided. The method comprises receiving a motor current signal from a motor of the circulatory support device, determining within a time window of the motor current signal, a measured current value at which flow through the circulatory support device is maximum, determining an offset value based, at least in part, on the measured current value, determining based, at least in part, on the received motor current signal, whether an abnormal condition has occurred, adjusting the motor current signal based, at least in part, on the offset value and the determination of whether an abnormal condition has occurred to produce an adjusted motor current signal, and determining the flow through the circulatory support device based, at least in part, on the adjusted motor current signal.