INRの自己管理により,機械的な心弁置換術後の抗凝固レベルが低下します
H Koertke1, K Minami, D Boethig
1Heart and Diabetes Center North Rhine-Westphalia Bad Oeynhausen, Germany, Clinic of the Ruhr University of Bochum, Bochum, Germany. hkoertke@hdz-nrw.de
Circulation
|September 13, 2003
まとめ
機械的な心弁置置換後の自己管理の抗凝固剤のターゲット国際標準化比率 (INR) の範囲を下げることで,出血合併症が軽減されました. このアプローチは,同様の血栓塞栓性イベントの発生率を維持し,患者の安全性を改善しました.
科学分野:
- 心臓病学 心臓病学
- バイオメディカルエンジニアリング
- クリニック・トライアル 臨床試験
背景:
- 抗凝固剤の自己管理は,医師の管理と比較して,機械的な心弁置換術後のINR制御を改善します.
- 以前の研究では,より高い治療用INR範囲 (2.5-4.5) を利用しました.
- ESCAT IIは,より低い目標INR範囲が安全性をさらに高めるかどうかを調査した.
研究 の 目的:
- 機械心弁の患者で自己管理の抗凝固療法を受けている患者で,より低い目標国際標準化比率 (INR) 範囲の有効性と安全性を評価する.
- 低用量のINR目標範囲と従来のINR目標範囲の合併症率を比較する.
主な方法:
- 3,300人の患者を対象とした前向きな,制御された,ランダム化,多センター試験 (ESCAT II) です.
- 1,818人の患者の中間分析で,低用量INRターゲット (1.8-2.8大動脈,2.5-3.5ミトラル) と従来のINRターゲット (2.5-4.5) を比較した.
- 機械的な心臓弁には,セント・ジュード・メディカル・スタンダードまたはメドトロニック・ホール義肢が含まれていました.
主要な成果:
- 低用量群 (0.56%) で出血合併症の発生率は,従来の用量群 (0.91%) に比べて有意に低かった.
- 血栓塞栓性イベントの発生率は,グループ間で比較可能でした (0.21%の線形化率).
- 治療用INR範囲の遵守は類似していました:低用量群では72%で,従来の群では74%でした.
結論:
- 自己管理された抗凝固療法により,機械的な心弁置換術後により低い,より緊密なINR標的範囲を効果的に使用することができます.
- 抗凝固剤の強度の低下は,血栓栓塞栓症に対する保護を損なうことなく,出血のリスクを低下させます.
- この戦略は,経口抗凝固薬の管理における患者の安全性を高めます.
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