非心臓外科手術後の手術中のデクスメデトミジンと妄想の間の用量依存的関係:遡及的なコホート研究
Elena Ahrens1,2, Luca J Wachtendorf1,2, Theresa Tenge1,2,3
1Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
Anaesthesia
|February 20, 2026
まとめ
低用量のデクスメデトミジン (DDX) は,手術後の妄想のリスクを軽減します. 妄想を防ぐための最適なDDX用量は0.25から0.35μg/kgの範囲で,より高い用量は効果を示さない.
科学分野:
- アネステシオロジー アネステシオロジー
- クリティカルケア・メディシン
- 神経科学は神経科学である.
背景:
- デックスメデトミジン (DDX) は,重症患者の妄想を緩和することが知られている.
- 術後の妄想に対するDDXの予防効果に関する証拠は不確定である.
- この研究では,手術中にDDXを投与した後のデリリウムの発症の用量依存のリスクを調査した.
研究 の 目的:
- 術内デクスメデトミジン (DDX) 投与が術後の妄想症のリスクに影響するかどうかを判断する.
- 非心臓,非移植手術後の妄想を緩和するための最適なDDX用量を特定する.
主な方法:
- 総麻酔を受けた114,786人の成人の患者の遡及的分析.
- 術内DDX用量 (累積 μg/kg) は,低 (≤0.49 μg/kg) または高 (>0.49 μg/kg) と分類されました.
- 7日以内の術後の妄想は,退院ノート,混乱評価方法,診断コードを使用して特定されました.
主要な成果:
- 4804人の患者がDDXを受けた (中位量は0.49μg/kg).
- 術後の妄想は,患者の2.8%で発生した.
- 低用量のDDXは妄想症のリスクの低下 (aOR0.61;P=0.004) と関連していたが,高用量のDDXは有意な効果を示さなかった (aOR1.06;P=0.62).
- 最低の妄想リスクのための最適なDDX用量は,0.25~0.35μg/kgと推定されています.
結論:
- 低用量デクスメデトミジン (DDX) の投与は,手術後の妄想症のリスクの低下と関連しています.
- 高用量DDXは,妄想に対する保護効果を提供しなかった.
- 妄想の予防のための最適な術内DDX用量範囲は,0.250.35μg/kgである.
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