What question did this study set out to answer?

Evaluate the influence of platelet counts and phospholipid concentrations on tissue factor-initiated thrombin generation and clotting kinetics.

January 1, 2001Thrombosis and Haemostasis

Platelets and Phospholipids in Tissue Factor-initiated Thrombin Generation

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Evaluate the influence of platelet counts and phospholipid concentrations on tissue factor-initiated thrombin generation and clotting kinetics.
Measured tissue factor (TF)-initiated thrombin generation in a reconstituted model across varying platelet and phospholipid concentrations.
Assessed TF (12.5 pM)-initiated whole-blood clotting times in a chemotherapy patient with varying platelet counts and in healthy controls (platelet counts 1.5–3.1 x 10^8/mL).
In the reconstituted model, thrombin generation reached a plateau rate of 1.0 nM/s at physiological platelet levels, whereas maximum rates (5.2–6.0 nM/s) occurred at 25–100 µM phospholipid.
Whole-blood clotting time accelerated from ~10 min to 5 min as platelet count rose from 0.05 x 10^8/mL to 0.11 x 10^8/mL, remaining stable above 0.5 x 10^8/mL and matching healthy control times (4.0 ± 0.5 min).

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Implication

Reconstituted and whole blood analysis demonstrates that clotting kinetics plateau above minimal platelet thresholds, indicating why bleeding risks sharply increase below critical platelet levels.

Cite This Study

Butenas et al. (2001) studied this question.

synapsesocial.com/papers/6a0ed38e1c5e2d2319f9eeed https://doi.org/10.1055/s-0037-1616110

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Implication

Reconstituted and whole blood analysis demonstrates that clotting kinetics plateau above minimal platelet thresholds, indicating why bleeding risks sharply increase below critical platelet levels.

Platelets and Phospholipids in Tissue Factor-initiated Thrombin Generation

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Platelets and Phospholipids in Tissue Factor-initiated Thrombin Generation

Key Points

Discussion

Implication

Cite This Study

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