Thrombin generation assessed as endogenous thrombin potential in patients with hyper- or hypo-coagulability

Area of Science:

• Coagulation science
• Hemostasis research
• Clinical diagnostics

Background:

• Endogenous thrombin potential (ETP) assesses plasma's pro- and anti-coagulant balance.
• ETP is valuable for investigating hyper- and hypo-coagulable states.
• Preliminary studies are needed before larger clinical investigations.

Purpose of the Study:

• To investigate the impact of phospholipids, tissue factor (TF), and residual platelets on ETP in frozen plasma.
• To establish optimal conditions for ETP measurements in various clinical contexts.
• To validate ETP as a diagnostic tool for coagulation disorders.

Main Methods:

• Analysis of platelet-poor and platelet-rich plasmas from healthy individuals and patients with specific conditions (oral anticoagulants, hemophilia, oral contraceptives).
• Assessment of ETP alterations induced by varying concentrations of phospholipids and TF.
• Evaluation of the effect of residual platelets and filtration on ETP in frozen plasma samples.

Main Results:

• Phospholipids showed minimal effect on ETP, except in women on oral contraceptives.
• Tissue factor (TF) had a slight effect, notably in hemophilia at low concentrations.
• Residual platelets significantly affected ETP in frozen plasma, an effect mitigated by pre-freezing filtration.

Conclusions:

• The study confirms the suitability of platelet-rich and platelet-poor plasma for ETP analysis.
• Filtering plasma before freezing is recommended to minimize the influence of residual platelets on ETP.
• The findings support the use of ETP for further clinical investigations into coagulation disorders.