1日の時間による誘導後の低血圧の発生率の差異:ポストホック傾向スコアマッチ分析
Johan T M Tol1, Arjen J G Meewisse1, Sijm H Noteboom2
1Department of Anaesthesiology, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105AZ Amsterdam, the Netherlands.
Journal of clinical anesthesia
|September 4, 2025
まとめ
朝の麻酔誘導は,誘導後の低血圧のリスクを高めます. この研究では,午後と比較して午前中に麻酔を受けた患者の低血圧と有意な血圧低下率が高かった.
科学分野:
- 麻酔科
- 生理学
- シルカディアンリズム
背景:
- 血圧やホルモン分泌を含む生理学的プロセスは,昼間のリズムを示します.
- これらの日々の変動は,患者の麻酔に対する感受性に影響を与える可能性があります.
- 麻酔誘導のタイミングは,麻酔後の結果に影響を与える可能性があります.
研究 の 目的:
- 麻酔誘導の日の時間が誘導後の低血圧の発生率に影響するという仮説を調査する.
- 麻酔誘導と低血圧の関係について
- 血圧の低下や 呼吸反射の感度などの 二次的な結果を探るため
主な方法:
- 760人の選択的な非心臓手術患者のデータを分析した結果,ポストホック傾向スコアが一致しました.
- 全身麻酔を施し,血圧をモニターした.
- 主要エンドポイント: 誘導後の低血圧の発生率 (平均動脈圧 ≥1分間65mmHg).
主要な成果:
- 誘導後の低血圧は,午前中に麻酔が誘導された場合より顕著であった (OR1. 48, p=0. 049).
- また,平均血圧の30%以上の低下は午前中により一般的であった (OR1. 45,p=0. 0499).
- 朝の誘導と午後の誘導の間に,重反射感度の有意な差異は観察されなかった.
結論:
- 朝の麻酔誘導は,誘導後の低血圧の発生率と関連しています.
- 発見は,既知の生理学的昼間の変動と一致しますが,測定されていない混同要因の影響を受けることがあります.
- 午前麻酔誘導と低血圧の間の因果関係を確認するには,さらなるランダム化研究が必要である.
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