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Related Experiment Videos

Simplification of a venous occlusion test.

A Mizuno1, J Isobe, K Shima

  • 1Department of Laboratory Medicine, School of Medicine, University of Tokushima, Japan.

Thrombosis Research
|April 1, 1991
PubMed
Summary

A simplified venous occlusion test using a 5-minute venous stasis effectively measures changes in serum Fibrin Degradation Products (FDP). This method shows promise for screening hypofibrinolytic or thrombotic states due to vascular dysfunction.

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Area of Science:

  • Clinical Biochemistry
  • Hematology
  • Vascular Biology

Background:

  • Fibrinolytic parameters are crucial for hemostasis.
  • Assessing fibrinolytic function often requires complex testing.
  • A simplified, reliable method for evaluating fibrinolysis is needed.

Purpose of the Study:

  • To determine optimal venous stasis duration and parameters for a simplified venous occlusion test.
  • To evaluate the clinical utility of a simplified test in patients with cerebral artery stenosis.

Main Methods:

  • Healthy volunteers (n=31) underwent venous occlusion (VO) for varying durations.
  • Plasma and serum fibrinolytic markers, including Fibrin Degradation Products (FDP), were measured.
  • Platelet aggregation was assessed using impedance and turbidimetric methods.

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  • The simplified test was validated in patients with cerebral artery stenosis (n=14).

    • Main Results:

    • A 5-minute venous stasis significantly increased serum FDP levels.
    • Serum FDP levels after 10 minutes of VO were not significantly different from 5 minutes.
    • ADP-induced platelet aggregation decreased with VO when measured by impedance, but not turbidimetry.
    • Patients with cerebral artery stenosis showed a significantly lower percentage increase in serum FDP post-VO compared to healthy subjects.

    Conclusions:

    • A 5-minute venous occlusion test measuring serum FDP is a suitable simplified method.
    • This test can help screen for hypofibrinolytic or thrombotic states linked to vascular dysfunction.
    • The findings support the use of serum FDP changes after 5-minute VO as a diagnostic tool.