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[A basic study on a highly sensitive automated method for hypercoagulable state in plasma, fluorogenic prothrombin

M Ohki1, S Tanaka, K Uchida

  • 1Tokyo Research Institute, Seikagaku Corporation, Higashi-yamato.

Rinsho Byori. the Japanese Journal of Clinical Pathology
|October 1, 1993
PubMed
Summary
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A new fluorogenic prothrombin time (FPT) method offers sensitive detection of hypercoagulable states in stroke patients. Optimal results require a two-step reagent addition and immediate analysis post-thawing for accurate blood clotting assessment.

Area of Science:

  • Biochemistry
  • Hematology
  • Clinical Chemistry

Context:

  • Hypercoagulable states increase stroke risk.
  • Accurate and sensitive detection methods are crucial for patient management.
  • Existing methods may lack sensitivity or require complex procedures.

Purpose:

  • To develop a highly sensitive, automated fluorogenic prothrombin time (FPT) method for detecting hypercoagulable states.
  • To optimize the FPT assay conditions, including reagent addition sequence and sample handling.
  • To evaluate the FPT method's performance using plasmas from stroke patients and compare it with existing assays.

Summary:

  • A novel fluorogenic prothrombin time (FPT) method was developed using a fluorogenic peptide substrate and a centrifugal autoanalyzer.

Related Experiment Videos

  • A two-step reagent addition (tissue factor/plasma followed by substrate) is essential for detecting hypercoagulability, unlike a one-step method.
  • Optimal sample storage at -80°C and immediate analysis post-thawing are critical for assay sensitivity.
  • The FPT method demonstrated good correlation with stroke patient data using both human and bovine tissue factors.
  • A similar fluorogenic approach was adapted for evaluating Factor X and VII concentrations.

    • Impact:

    • Provides a sensitive, automated diagnostic tool for hypercoagulable states.
    • Improves the accuracy of clotting time assessments in stroke patients.
    • Offers a reliable method for evaluating specific coagulation factor deficiencies.