公开(公告)号：US20230131738A1

公开(公告)日：2023-04-27

申请号：US17971269

申请日：2022-10-21

申请人： ABIOMED, Inc.

发明人： Mohammed Alwatban ,  Maxim Daschewski ,  Qing Tan ,  Andre Chuev ,  Ahmad El Katerji

IPC分类号： A61M60/148 ,  A61M60/178

摘要： Systems and methods for detecting suction events in blood pumps by monitoring pump motor current. A pump suction event is detected based on a comparison of a pulsatility index that is calculated based on a filtered pump motor current signal with a first predetermined threshold or based on a comparison of a calculated index associated with a normalized band-pass filtered pump motor current signal with a second predetermined threshold. A suction event is also detected based on comparisons of both the calculated pulsatility index and the calculated index associated with the normalized band-pass filtered pump motor current signal with respective first and second predetermined thresholds.

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.