Abstract: Rotary blood pump will be used widely as a left ventricular assist device. However, one obstacle for the centrifugal pump is an control method that can maintain an optimum flow rate with the physiological condition. Thus, the object of this study is to develop this optimum control system for the centrifugal pump is the aim of this study. Six pigs having an LVAD were subjected for this acute study The LVAD was a Gyro C1E3 centrifugal pump. The assist ratios were changed from 30 to 100 %. In this study, the external work of the motor (the torque ± the motor speed) was compared with the external work of the pump (the pump flow rate ± aortic pressure). There was high correlation between the external work of the actuator and the external work of the pump. Also there was high correlation between the assisted ratio and the external work of the pump. Thus the predicted pump flow rate was calculated from the external work of the motor and aortic pressure. The value of the coefficient of determination (R) between the measured and estimated pump flow rate was 0.8. From these results, the external work of the motor will be useful to control the rotary blood pump. Because this parameter includes the pump flow rate and the after road. This parameter available from intrinsic parameters of the pump and need no sensors. This parameter is simple, yet effective and reliable servo control methods of a rotary blood pump.
Publication Year: 2000
Publication Date: 2000-03-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 1
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