大手術後の麻酔の深さと合併症:国際的,ランダム化制御試験
Timothy G Short1, Douglas Campbell1, Christopher Frampton2
1Auckland City Hospital, Auckland, New Zealand; University of Auckland, Auckland, New Zealand.
Lancet (London, England)
|October 25, 2019
まとめ
軽度の全身麻酔は,高齢の手術患者における深度の全身麻酔と比較して,1年後の死亡率を低下させなかった. この研究は,重度の手術のための安全な麻酔の深さの範囲に関する証拠を提供します.
科学分野:
- 麻酔科 と 集中治療 科
- 手術 結果 と 患者 の 安全 性
- 高齢者医療
背景:
- 観察研究は,より深い麻酔と手術後の生存率の減少との関連を示唆しています.
- 死亡率に関する異なる麻酔の深さを比較するランダム化制御試験の証拠は限られている.
- この研究は,麻酔の深さと患者の結果に関する高品質の証拠の欠如に対処しています.
研究 の 目的:
- 大手手術を受けた高齢患者の1年間の全原因死亡率を比較する.
- 軽度の全身麻酔と深い全身麻酔の安全性と有効性を評価する.
- バイスペクトル指数 (BIS) の目標値が患者の生存に与える影響を決定する.
主な方法:
- 60歳以上の大手手術を受けた6644人の高リスク患者を対象とした国際ランダム化比較試験です.
- 患者は軽度の全身麻酔 (BISターゲット50) または深い全身麻酔 (BISターゲット35) に割り当てられました.
- 主なアウトカムは,マスクされた患者と評価者の割り当てによる1年間の全原因死亡率でした.
主要な成果:
- 1年間の死亡率は,軽麻酔群 (BIS50) で6. 5%,深麻酔群 (BIS35) で7. 2%であった.
- 1 年の死亡率の有意な差はない (危険比率0. 88,95%CI0. 73~1. 07).
- グレード3とグレード4の有害事象の割合は,両群とも同様であった.
結論:
- この患者集団では,軽度の全身麻酔は,深度の全身麻酔と比較して1年での死亡率の低下と関連しませんでした.
- この発見は,処理された電気脳図によるモニタリングを使用して,幅広い麻酔の深さを安全に管理できることを示唆しています.
- この試験は,高リスクの手術患者の麻酔管理を最適化するための貴重なデータを提供します.
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