E-4 体内埋込型補助人工心臓から放射される電磁ノイズの測定(生体治療・医療,バイオ操作・検査)

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This paper reports on the impact of setup of a ventricular assist system (VAS) and the VAS surroundings on measurement of electromagnetic noise from VAS, based on CISPR pub.11. We measured four types of electromagnetic noise. Type 1 consisted only of the VAS. Type 2 was the VAS and a human subject who gripped the VAS actuator. Type 3 was the VAS and a copper rod that connected to ground and the actuator. Type 4 was the VAS and a human who gripped the actuator and directly touched the copper rod. When the measurement frequency was 30 MHz, the electromagnetic noise of Type 2 increased by 1.6 dBμV/m, compared to the electromagnetic noise of Type 1. Electromagnetic noise of Type 3 and Type 4 also increased, by 5.2 dBμV/m and 2.6 dBμV/m, respectively, compared to electromagnetic noise of Typel. Based on these results, the setup of a VAS and its surroundings were confirmed to affect the amounts of electromagnetic noise measured.
2010-03-16