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関連する概念動画

Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

889
Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
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Coagulation01:09

Coagulation

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The coagulation phase is a critical part of the body's process to prevent blood loss following injury to blood vessels. It involves chemical reactions that form a clot to seal the injured area. The clotting process begins shortly after injury, within 15-20 seconds for severe damage and 1-2 minutes for minor injuries.
During the coagulation phase, clotting factors, or procoagulants, play a vital role in initiating and progressing the coagulation cascade. This cascade is a series of reactions...
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Updated: Sep 9, 2025

Measurement of Factor V Activity in Human Plasma Using a Microplate Coagulation Assay
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Measurement of Factor V Activity in Human Plasma Using a Microplate Coagulation Assay

Published on: September 9, 2012

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液体プラズマと解凍されたプラズマ:貯蔵中の凝固因子活性変化の追跡

Nalan Yurtsever, Catherine Gereg, Nichelle Perera

    medRxiv : the preprint server for health sciences
    |September 2, 2025
    PubMed
    まとめ
    この要約は機械生成です。

    液体プラズマ (LQP) は,緊急輸血のための解凍プラズマ (TP) よりも長い保存期間を提供します. LQPは重要な凝固因子のレベルが比較可能で,重症治療のシナリオでは有効な代替品です.

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    Author Spotlight: High-Sensitivity Tissue Factor Activity Assay for Plasma Diagnosis
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    Leveraging Turbidity and Thromboelastography for Complementary Clot Characterization
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    Last Updated: Sep 9, 2025

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    Author Spotlight: High-Sensitivity Tissue Factor Activity Assay for Plasma Diagnosis
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    科学分野:

    • 輸血 医学
    • 血液学
    • 生物化学

    背景:

    • 液体プラズマ (LQP) は,新生輸血において,解凍されたプラズマ (TP) よりも有効期間が長い代替品です.
    • LQPにおける凝固因子の安定性と活性性の評価は,その臨床適用において極めて重要です.

    研究 の 目的:

    • LQPにおけるフィブリノゲン,タンパク質C,タンパク質S,FV,FVII,FVIIIの活性を測定する.
    • 貯蔵中のLQPにおけるこれらの因子レベルの変化を定量化する.
    • LQP因子の活性とTPの活性を比較する.

    主な方法:

    • LQP (n=26) で15,26,27日,TP (n=24) で5日測定した.
    • ベイジアン統計モデリングは,因子活動を比較し,貯蔵に関連する変化を評価するために使用されました.

    主要な成果:

    • 26日 (LQP26) のフィブリノゲンとプロテインCの活性度は,第5日 (TP5) のTPと同等であった.
    • FV,FVII,FVIIIの活動は,TP5と比較して,LQP26でわずかに低かった.
    • タンパク質Sの活性度は,TP5 (64. 9%) よりも,LQP26 (28. 0%) で有意に低かった.
    • FVIIの活動はLQPの15日から26日まで減少したが,他の要因は安定したままだった.

    結論:

    • LQPは,より低いタンパク質Sレベルを除いて,緊急使用のためのTPと比較可能なフィブリノゲン,タンパク質C,FV,FVII,およびFVIIIの活動を表しています.
    • LQPは,長期保存期間と適切な因子レベルのため,緊急輸血および大量輸血プロトコルに適した代替手段です.