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公开(公告)号：US12102814B2
公开(公告)日：2024-10-01
申请号：US17193548
申请日：2021-03-05
申请人： HeartWare, Inc.
IPC分类号： A61M60/122 , A61B5/0215 , A61M5/142 , A61M60/126 , A61M60/538 , A61M60/585 , A61M60/592 , A61B5/00
CPC分类号： A61M60/538 , A61M5/1428 , A61M60/126 , A61M60/585 , A61M60/592 , A61B5/0031 , A61B5/0215 , A61B5/686 , A61M2205/3334
摘要： A method of determining a presence of suction in a patient having an implantable blood pump from down-sampled log files. The method comprising calculating a waveform index for each of a plurality of flow rate data points from the down-sampled log files. The calculated waveform index is compared with a predetermined waveform index threshold. A non-suction trough baseline is calculated from the plurality of flow rate data points. A difference between a measured trough and a calculated non-suction trough baseline is compared with a predetermined threshold. The presence of suction for each of the plurality of flow rate data points is determined if the calculated waveform index is greater than the predetermined waveform index threshold and the difference between the measured trough and a calculated non-suction trough baseline is greater than the predetermined threshold.
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公开(公告)号：US11707617B2
公开(公告)日：2023-07-25
申请号：US17095096
申请日：2020-11-11
申请人： HeartWare, Inc.
IPC分类号： A61M60/216 , A61M60/546 , A61M60/538 , A61M60/148 , A61M60/422
CPC分类号： A61M60/538 , A61M60/148 , A61M60/422 , A61M2205/18 , A61M2205/3331 , A61M2230/04
摘要： A control circuit for a sensorless implantable blood pump configured to determine mitral valve regurgitation includes processing circuitry configured to generate an estimated blood flow waveform from the sensorless implanted blood pump and generate an alert if between an end period of diastole and a beginning period of systole a measured amplitude of the estimated blood flow waveform does not include an inflection point.
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公开(公告)号：US11648393B2
公开(公告)日：2023-05-16
申请号：US17144290
申请日：2021-01-08
申请人： HeartWare, Inc.
IPC分类号： A61M60/226 , A61M60/857 , A61M60/165
CPC分类号： A61M60/857 , A61M60/226 , A61M60/165
摘要： An inflow cannula for an implantable blood pump having an impeller defining a plurality of flow channels, the inflow cannula includes a proximal end a distal end proximate the impeller, the distal end including a protuberance extending outward from the inflow cannula.
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公开(公告)号：US11376419B2
公开(公告)日：2022-07-05
申请号：US17017873
申请日：2020-09-11
申请人： HeartWare, Inc.
发明人： Carlos Reyes , Fernando Casas
IPC分类号： A61M60/50 , A61M60/148 , A61M60/419 , A61M60/857
摘要： 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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公开(公告)号：US20220203083A1
公开(公告)日：2022-06-30
申请号：US17654724
申请日：2022-03-14
申请人： HeartWare, Inc.
发明人： Justin Wolman , Fernando Casas , Carlos Reyes
IPC分类号： A61M60/122 , A61M60/50 , A61M60/148 , A61M60/422
摘要： 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.
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公开(公告)号：US20220157448A1
公开(公告)日：2022-05-19
申请号：US17097169
申请日：2020-11-13
申请人： HeartWare, Inc.
摘要： A method of determining adverse events from log file data from operation of an implantable blood pump. The method includes measuring a flow pulsatility from flow rate data recorded in a log file. A moving mean of the measured flow pulsatility is calculated. A moving standard deviation of the measured flow pulsatility is calculated. A difference between the moving mean of the measured pulsatility and the moving standard deviation of the measured flow pulsatility is calculated. If the difference is less than a first predetermined threshold, an alert is generated as the presence of an adverse event.
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公开(公告)号：US11273300B2
公开(公告)日：2022-03-15
申请号：US16143984
申请日：2018-09-27
申请人： HeartWare, Inc.
发明人： David A. Schafir
IPC分类号： A61M60/148 , A61M60/258 , A61M60/40 , A61M60/50 , A61M60/894 , F04B35/04 , A61M60/562 , A61M60/892
摘要： A pulsatile blood pump including a chamber having an upstream portion, a downstream portion, and a wall coupling the upstream portion to the downstream portion, the upstream portion defining an inlet sized to fit within a ventricle of a heart, the downstream portion defining an outlet, and the wall defining a bore; a piston disposed within the bore of the wall, the piston including a first side in continuous fluid communication with the ventricle of the heart when the inlet is within the ventricle of the heart and defining a travel path within the bore including an upstream direction toward the inlet and a downstream direction toward the outlet; and a valve coupled to the piston and defining a one-way fluid flow path within the chamber through the first side of the piston in the downstream direction.
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公开(公告)号：US20220062617A1
公开(公告)日：2022-03-03
申请号：US17500032
申请日：2021-10-13
申请人： HeartWare, Inc.
IPC分类号： A61M39/26 , A61M1/36 , F16L37/244 , F16L37/36
摘要： A dry disconnect device including a first portion defining an outlet and an outlet portion of a fluid pathway and a female valve disposed within the first portion having an extended position, including the female valve being configured to seal the outlet portion, and a retracted position. A second portion defining an inlet and an inlet portion of the fluid pathway is lockingly engageable with the first portion. A male valve is disposed within the second portion including a male valve transition member configured to translate the male valve from an extended position to a retracted position including the male valve being configured to seal the inlet portion. The extended position of the male valve causes the female valve to transition from the extended position to the retracted position and causes the outlet portion and the inlet portion of the fluid pathway to be in fluid communication with each other.
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公开(公告)号：US11154701B2
公开(公告)日：2021-10-26
申请号：US16534615
申请日：2019-08-07
申请人： HeartWare, Inc.
发明人： Carlos Reyes , Fernando Casas , Justin Wolman
摘要： 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.
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公开(公告)号：US20210052219A1
公开(公告)日：2021-02-25
申请号：US17089924
申请日：2020-11-05
申请人： HeartWare, Inc.
发明人： Neil VOSKOBOYNIKOV , Veronica RAMOS
摘要： A method determining adverse events from operation of an implantable blood pump including calculating a moving average convergence divergence (MACD) based on power consumed by the implantable blood pump to maintain a constant rotational speed of an impeller of the implantable blood pump. An alert is generated when the calculated MACD diverges from a predetermined MACD threshold and a predetermined MACD zero-crossing time threshold.
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