敗血症における死亡率予測のための血小板ベースの指標の予測値
Alice Nicoleta Drăgoescu1, Adina Turcu-Stiolica2, Marian Valentin Zorilă3
1Department of Anesthesiology and Intensive Care, Faculty of Medicine, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania.
Biomedicines
|January 28, 2026
まとめ
C反応性タンパク質と血小板の比率(CPR)は、敗血症患者の早期死亡を効果的に予測します。この低コストのバイオマーカーは、日常検査から得られ、集中治療室(ICU)のリスク層別化に役立ちます。
科学分野:
- 集中治療医学
- バイオマーカー
- 敗血症の病態生理
背景:
- 敗血症および敗血症性ショックは、治療の進歩にもかかわらず、ICU死亡率の主な原因であり続けています。
- 早期の予後評価は、敗血症管理における臨床的意思決定を導く上で重要です。
- 血小板由来指数は、敗血症における炎症および凝固の潜在的な低コスト指標を提供します。
研究 の 目的:
- 敗血症患者の院内死亡率に対する様々な血小板ベースの比率の予測性能を評価すること。
- ICUにおける早期リスク層別化に最も効果的な血小板由来指数を特定すること。
主な方法:
- 三次ICUに入院した成人敗血症/敗血症性ショック患者114名を対象とした前向き観察研究を実施しました。
- 測定されたバイオマーカーには、C反応性タンパク質と血小板の比率(CPR)、血小板とリンパ球の比率(PLR)、血小板と白血球の比率(PWR)、および血小板とクレアチニンの比率(PCR)が含まれていました。
- ロジスティック回帰およびROC分析により、死亡率の予測精度を評価しました。
主要な成果:
- 非生存者は生存者と比較して、CRPおよびCPR値が高く、血小板/リンパ球数が低いことを示しました。
- CPRは、生存者と非生存者を区別する上で最も高い精度を示しました(AUC 0.757)。
- CPRは、PLRおよびPWRとは異なり、院内死亡率を独立して予測しました(OR 1.98)。
結論:
- CPRは、他の血小板指数を上回る、早期敗血症死亡率の堅牢で臨床的に適用可能な予測因子です。
- 日常検査から得られるCPRは、ICUにおける初期リスク層別化のための価値あるツールです。
- CPRの予後的役割および既存のスコアリングシステムへの統合を検証するためには、さらなる多施設共同研究が必要です。
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