Research on Electromagnetic Radiation of Ventricular Assist Device and the Crosstalk with Other Implantable Devices
LI Shu, HAO Ye, WANG Quan
1. a. Department of Medical Equipment; b. Radiation Therapy Center, Nanjing First Hospital, Nanjing Medical University, Nanjing Jiangsu 210006, China；2. Center of Medical Physics with Nanjing Medical University, Nanjing Jiangsu 210029, China; 3. Nanjing
Emergency Medical Center, Nanjing Jiangsu 210003, China
Abstract：Objective To evaluate the electromagnetic crosstalk of magnetic levitation blood pump and explore the corresponding solutions. Methods By analyzing the signal waveform generated by the controller and the high current driving signal transmitted
by the control line, the magnitude and path of the electromagnetic disturbance which caused by the modulation and driving mode of the controller were studied. Combined with the analysis results of electromagnetic characteristics, such as the distribution
of electromagnetic field and the transmission of electromagnetic energy, the influence of electromagnetic disturbance on other implanted devices such as implantable pacemaker and implantable defibrillator was evaluated. Results Three phase motor U, V,
W control drive signal in accordance with the drive sequence in a specific time to complete the control of the blood pump rotor, the driving signal (square wave) frequency of the blood pump was about 40 kHz. The pulse width was about 5 ms at low speed and 1.8
ms at high speed. In addition, the spectrum components of different working modes were basically the same, but the distribution is different. Conclusion As left ventricular assist device and other cardiac treatment devices are becoming more and more common in
end-stage patients, the interaction of devices should be considered and valued.
李澍，郝烨，王权. 心室辅助装置自身电磁辐射及其与其他植入器械的串扰研究[J]. 中国医疗设备, 2021, 36(1): 44-48.
LI Shu, HAO Ye, WANG Quan. Research on Electromagnetic Radiation of Ventricular Assist Device and the Crosstalk with Other Implantable Devices. China Medical Devices, 2021, 36(1): 44-48.
