| Japanese |
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| Title | 経気管ドプラ法による連続的心拍出量測定の臨床評価 -有用性とその限界- |
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| Subtitle | 原著 |
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| Authors | 森本裕二*, 大塚浩司*, 岡村篤*, 劔物修* |
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| Organization | *北海道大学医学部麻酔学講座 |
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| Journal | 循環制御 |
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| Volume | 11 |
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| Number | 3 |
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| Page | 347-352 |
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| Year/Month | 1990/ |
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| Article | 原著 |
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| Publisher | 日本循環制御医学会 |
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| Abstract | 「要旨」全身麻酔管理課に経気管ドプラ法(TTD)により心拍出量(DCO)を測定し, 熱希釈法による値(TDCO)と比較検討する事によりその有用性を検討した. 15例, 166回の測定においてTDCO値とDCO値の相関係数は0.23と低値を示した. その主要因として, 超音波の入射角の設定値とのずれと, 上行大動脈内径測定値の誤差の2点が考えられた. 両者を補正すると相関係数は0.93と有意な相関を認めた. また, 循環動態の変動が予測される手術では, 大動脈径等が変化する可能性がある. そのため手術中には大動脈径の設定変更や, 適正入射角の維持のためチューブの位置変換など頻回に行う必要がある. |
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| Practice | 基礎医学・関連科学 |
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| Keywords | cardiac output measurement, transtracheal doppler |
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| English |
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| Title | Efficacy of continuous cardiac output measurement with transtracheal Doppler in clinical settings |
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| Subtitle | |
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| Authors | Yuji Morimoto, Koji Otsuka, Atsushi Okamura, Osamu Kemmotsu |
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| Organization | Department of Anesthesiology Hokkaido University School of Medicine |
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| Journal | Circulation Control |
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| Volume | 11 |
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| Number | 3 |
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| Page | 347-352 |
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| Year/Month | 1990/ |
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| Article | Original article |
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| Publisher | Japan Society of Circulation Control |
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| Abstract | The accuracy of cardiac output measurement with transtracheal Doppler (TTD) was evaluated in 17 patients scheduled for abdominal surgery under general anesthesia after institutional approval and informed consent. A total of 180 paired values of cardiac outputs obtained by TTD (DCO) and themodilution method (TDCO) were compared in 15 patients. In remaining 2 patients, DCO was not measured since one was due to one lung intubation at the best point, and the diameter of the aorta could not be measured in another. The initial regression coefficient was 0.23 between DCO and TDCO. It was speculated that two points were critical for this low co-efficient, which were the error of angle of ultrasound beam against established angle (52.4°) and the error of the aortic diameter measured by TTD. The coefficient was improved to 0.93 after correction of these two points. Our results also indicates that the values of DCO are overestimated above 51/min by TDCO and underestimated below 51/min. This suggests that the diameter of the aorta might change in proponion to the hemodynamic changes during the procedure. Therefore, the frequent correction of the aortic diameter will be needed with repositioning of an endtracheal tube in order to make this method feasible to use in clinical settings. |
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| Practice | Basic medicine |
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| Keywords | cardiac output measurement, transtracheal doppler |
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