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公开(公告)号:US07645225B2
公开(公告)日:2010-01-12
申请号:US10333759
申请日:2001-03-19
IPC分类号: A61M1/12
CPC分类号: A61M1/101 , A61M1/1086 , A61M1/122 , A61M2205/3334 , A61M2205/3365
摘要: In a left ventricular assist device (LVAD) a rotodynamic blood pump (10) is powered by a brushless DC motor (12). A power supply (14) supplies power to the motor (12). Three feedback channels, one for each of voltage, current, and motor speed lead to a microcontroller or microprocessor (18). The three feedback waveforms are analyzed, and from these waveforms, motor input power, patient heart rate, current pump flow rate, and systemic pressure are determined. The microprocessor (18) then calculates a desired flow rate proportional to the patient heart rate. The microprocessor communicates a new power output to a commutation circuit (16), which regulates power to the motor (12). The pump (10) also includes safety checks that are prioritized over desired pump flow. These include prevention of ventricular suction, low pulsatility, minimum and maximum pump speed, minimum speed-relative pump flow, minimum absolute pump flow, minimum and maximum motor input power.
摘要翻译: 在左心室辅助装置(LVAD)中,旋转动力血泵(10)由无刷DC马达(12)供电。 电源(14)向马达(12)供电。 三个反馈通道,一个用于每个电压,电流和电机速度,导致微控制器或微处理器(18)。 分析三个反馈波形,并从这些波形中确定电机输入功率,患者心率,电流泵流量和全身压力。 微处理器(18)然后计算与患者心率成比例的期望流率。 微处理器将新的功率输出传送到换向电路(16),该换向电路调节电动机(12)的功率。 泵(10)还包括优先于所需泵流量的安全检查。 这些包括预防心室抽吸,低搏动,最小和最大泵速,最小速度相对泵流量,最小绝对泵流量,最小和最大电机输入功率。