電磁波混入防止対策として試作した光ファイバ利用の光伝送脳波計  [in Japanese] A fiber-optic EEG instrument developed for the reduction of electromagnetic interference  [in Japanese]

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Author(s)

Abstract

頭皮上導出脳波への電気メス使用時の電磁波混入を防止する目的で光伝送脳波計を試作した。試作した4チャネル仕様の光伝送脳波計は,導出電極からの電気信号を光信号に変換し光ファイバで伝送し,脳波記録機器ヘインプットする直前に再び電気信号に戻す。全身麻酔下開腹手術患者で光伝送脳波計と通常脳波計を用いて頭皮上脳波を同時記録すると,ほぼ同じ波形が得られた。電気メス使用時には通常脳波計では電磁波混入が強く脳波を記録できなかったが,光伝送脳波計では術中を通して脳波記録,モニタリングに支障はなかった。光伝送脳波計は頭皮上電極から脳波計への伝導性を遮断するので,電磁誘導,静電誘導対策に苦慮する手術室での脳波記録,モニタリングに有用と考える。

The authors have developed a fiber-optic, 4-channel EEG instrument for the reduction of electromagnetic interference, in which bioelectric signals were transmitted with being once converted to optical pulses through an electrical-to-optical transducer and were then inversed through an optical-to-electrical transducer immediately before entering the output instrument over a single fiber channel. It was confirmed in surgical patients under general anesthesia that EEG waveforms obtained with the fiber-optic EEG instrument were almost same with those recorded simultaneously with a conventional EEG instrument. EEG recording with the fiber-optic EEG instrument was not disrupted even during the use of electrocautery. Because electrical conductivity was interrupted with an optic fiber interposed between scalp electrodes and the EEG instrument, the fiber-optic EEG instrument seems to be useful for EEG recordings in a surgical center, where it is hard to exclude electromagnetic and electrostatic interferences.

Journal

  • Journal of the Japanese Society of Intensive Care Medicine

    Journal of the Japanese Society of Intensive Care Medicine 9(2), 143-146, 2002-04-01

    The Japanese Society of Intensive Care Medicine

References:  4

Codes

  • NII Article ID (NAID)
    10008940537
  • NII NACSIS-CAT ID (NCID)
    AN10474053
  • Text Lang
    JPN
  • Article Type
    NOT
  • ISSN
    13407988
  • Data Source
    CJP  J-STAGE 
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