直接経口抗凝固薬の検査室測定値:血液検体の異なる保存条件の影響
Andrea Sorrentino1, Angela Rogolino2, Francesca Cesari2
1Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy.
International journal of laboratory hematology
|December 23, 2025
まとめ
直接経口抗凝固薬(DOAC)の血漿中濃度は、様々な保存条件下で24時間安定しており、遅延した場合でも信頼性の高い検査が保証されます。一部のDOACにおける軽微なバイアスは、通常、臨床的な意思決定に影響を与えません。
科学分野:
- 薬理学
- 臨床化学
- 分析毒物学
背景:
- 直接経口抗凝固薬(DOAC)は広く使用されており、特定の臨床シナリオでは信頼性の高い血漿中濃度検査が必要です。
- 検体保存条件がDOACアッセイの精度に与える影響は十分に確立されていません。
- 本研究では、24時間保存後の4つのDOAC(アピキサバン、リバーロキサバン、エドキサバン、ダビガトラン)の安定性を調査します。
研究 の 目的:
- アピキサバン、リバーロキサバン、エドキサバン、ダビガトランの血漿中濃度の24時間保存後の安定性を評価すること。
- 異なる保存条件(室温、4℃、-20℃)によって導入される可能性のある系統誤差を評価すること。
- DOAC検査の遅延が臨床的解釈に影響を与えるかどうかを判断すること。
主な方法:
- DOAC療法を受けている182人の患者が登録されました。
- 血液検体は重複して採取され、一方は直ちに処理され、もう一方は全血または血漿として24時間保存されました。
- DOAC濃度は専用のアッセイを使用して測定され、安定性はBland-Altman分析を含む統計的手法で分析されました。
主要な成果:
- 全ての試験されたDOACは、24時間で良好な安定性を示し、中央値回収率は93%から102%でした。
- 保存条件による有意な比例誤差は検出されませんでした。
- アピキサバン、リバーロキサバン、エドキサバンでは軽微な定数バイアスが観察されましたが、ダビガトランでは有意なバイアスは示されませんでした。
- 変動性は7%未満で低く保たれました。
結論:
- DOACの血漿中濃度は、室温、4℃、-20℃を含む様々な保存条件下で、少なくとも24時間安定しています。
- 特定のDOACで観察された軽微なバイアスは、ほとんどの状況で臨床的解釈を損なう可能性は低いです。
- DOACレベルの検査は、結果の信頼性を損なうことなく、採取後に延期することができます。
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