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タイトル: 心臓血液駆出に伴う胸部インピーダンス変化検出による電気的インピーダンス心拍出量計測用至適スポット電極配置
その他のタイトル: An Optimal Spot-Electrodes Array for Voltage Pick-Up Determined from the Measurement of Transthoracic Electrical Impedance Change Following Cardiac Ejection
著者: 五十嵐, 朗
野川, 雅道 link image link image
山越, 健弘
本井, 幸介 link image link image
田中, 志信 link image link image
山越, 憲一
Igarashi, Akira
Nogawa, Masamichi
Yamakoshi, Takehiro
Motoi, Kosuke
Tanaka, Shinobu
Yamakoshi, Kenichi
発行日: 2008年12月10日
出版社(者): 日本生体医工学会 = Japanese Society for medical and Bilogical Engineering
雑誌名: 生体医工学 : 日本エム・イー学会誌 = Transactions of the Japanese Society for Medical and Biological Engineering
ISSN: 1347-443X
巻: 46
号: 6
開始ページ: 587
終了ページ: 594
キーワード: impedance or admittance cardiography
cardiac output
stroke volume
optimal spot-electrodes array
抄録: Electrical impedance (or admittance) cardiography is a simple and still potential method for non-invasive and continuous monitoring of stroke volume and cardiac output (CO) by detecting the electrical impedance of a thorax which is roughly assumed to be a two-compartment coaxial cylindrical model composed of the aorta and its surrounding thoracic tissues. Although the band-electrode method proposed by Kubicek et al. has been widely used for the detection of the electrical impedance, long-term use of the band-electrodes is often uncomfortable and causes inflammation of the skin. Replacement of band-electrodes with spot-electrodes is therefore highly required for clinical practice. We have previously investigated an optimal spot-electrodes array from such a view point, and reported these results in this journal. However, the current distribution during cardiac blood ejection period showed little uniformity, and detailed investigation of this phenomenon was remained as a future problem. The present study concerns with this problem through the analysis of pulsatile components of the thoracic impedance along the medial line of the thorax by a finite element method and those by actual measurement. From these investigations, an optimal electrodes-location for voltage pick-up was to be determined as the medial portion at the level of the clavicle and the portion above the xiphisternum. Furthermore, we have investigated the accuracy of CO measurement using impedance cardiography by the new spot-electrode array to that using a pulse dye-densitometry method. From the CO comparison experiments, bias and precision calculated for the impedance cardiography versus a pulse dye-densitometry method averaged -0.43±1.42L/min, the validity and reasonable accuracy of the new spot-electrodes array was clearly demonstrated.
URI: http://hdl.handle.net/2297/28488
関連URI: http://www.asas.or.jp/jsmbe/
資料種別: Journal Article
権利関係: Copyright (c) 2009 社団法人日本生体医工学会
版表示: publisher

このアイテムを引用あるいはリンクする場合は次の識別子を使用してください。 http://hdl.handle.net/2297/28488



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