Estimation of left ventricular recovery level based on the motor current waveform analysis on circulatory support with centrifugal blood pump.
Estimation of left ventricular recovery level based on the motor current waveform analysis on circulatory support with centrifugal blood pump.
复制标题
基于离心血泵循环支持的运动电流波形分析估计左心室恢复水平。
DOI：
10.1046/j.1525-1594.2001.06862.x
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发表时间：
2001
影响因子：
2.4
通讯作者：
S. Takatani
中科院分区：
文献类型：
--
作者：
K. Takahashi;M. Uemura;N. Watanabe;K. Ohuchi;M. Nakamura;Y. Fukui;T. Sakamoto;S. Takatani
在使用离心式血泵模拟左心转流的模拟循环回路中，对离心泵的电机电流波形进行了分析，以得出一个有用的参数来评价心功能状态。研究了反映脉动室压的周期性运动电流波形(MCpsdP)功率谱密度的峰值、幅值和基频峰值与左心室压(LVP)峰值的关系。虽然运动电流波形的峰值和幅值与峰值LVP有很好的相关性，但它们不能预测主动脉瓣的开放。与心率频率相对应的MCpsdP与各LVP水平的峰值LVP均有很好的相关性，但两者之间的斜率随主动脉瓣的开放而变化。因此，可以跟踪LVP的变化，甚至可以检测到主动脉瓣的打开，从而检测到左心室的恢复。然而，线性回归方程的斜率随泵速的不同而变化。这一结果表明，在离心式血泵辅助循环过程中，MCPSDP可能被用来跟踪心功能的变化，以及根据心功能的变化来控制泵速。
In a mock circulatory loop simulating the left heart bypass using a centrifugal blood pump, analysis of the motor current waveform of the centrifugal pump was performed to derive a useful parameter to evaluate the status of ventricular function. The relationship between the peak, amplitude, and the peak of the fundamental frequency of the power spectral density of the periodic motor current waveform (MCpsdP) that reflected the pulsatile ventricular pressure, and the peak of the left ventricular pressure (LVP) was examined. Although both peak and amplitude of the motor current waveform showed an excellent correlation with the peak LVP, they failed to predict the opening of the aortic valve. The MCpsdP that corresponds to the frequency of the heart rate showed an excellent correlation with the peak LVP throughout the LVP levels, but the slope between them changed with the opening of the aortic valve. Thus, it is possible to follow the change in the LVP and detect even the opening of the aortic valve, and, hence, the recovery of the left ventricle. However, the slope of the linear regression equation varied, depending on the pump speed. This result implies that the MCpsdP can be possibly used to follow the change of ventricular function during circulatory assistance with a centrifugal blood pump as well as to control the pump speed in response to varying ventricular function.