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ID 17147
Eprint ID
17147
フルテキストURL
Thumnail 89_713.pdf 1.97 MB
タイトル(別表記)
Electrostatic transducer of apexcardiogram
著者
石井 義久 岡山大学医学部第一内科教室
平野 和博 岡山大学医学部第一内科教室
河合 辰哉 岡山大学医学部第一内科教室
斉藤 大治 岡山大学医学部第一内科教室
原岡 昭一 岡山大学医学部第一内科教室
抄録
Apexcardiogram by mean of non-invasive method may be more usefull provided that the technique for the transducer attachment was easier and reprodusable. In this report, some attempts on the transducer of apexcardiogram were described. A precordial electrode was placed about 1.5 mm above the chest wall of a patient. The electrostatic capacitance between the electrode and chest wall was transmitted to the CR oscillator and it modulated the frequency of pulse train generated with the oscillator. The signals were led to a conventional D.C. recorder or a cathode ray oscilloscope. There was no remarkable differences of the wave pattern between the apexcardiogram obtained by our method and by conventional piezoelectric transducer in normal cases. In some patients, however, some differences were observed especially in the depth of O-wave. The depth of O-wave increased in accordance with a rise in pressure of the transducer to the chest wall using the conventional method. The observations suggest that the A/E-O ratio might be varied depending on attaching pressure of the transducer to the chest wall.
発行日
1977-06-30
出版物タイトル
岡山医学会雑誌
出版物タイトル(別表記)
Journal of Okayama Medical Association
89巻
5-6号
出版者
岡山医学会
出版者(別表記)
Okayama Medical Association
開始ページ
713
終了ページ
720
ISSN
0030-1558
NCID
AN00032489
資料タイプ
学術雑誌論文
オフィシャル URL
https://www.jstage.jst.go.jp/article/joma1947/89/5-6/89_5-6_713/_article/-char/ja/
関連URL
http://www.okayama-u.ac.jp/user/oma/index.html
言語
Japanese
著作権者
岡山医学会
論文のバージョン
publisher
査読
有り
Eprints Journal Name
joma