"TEG talk": expanding clinical roles for thromboelastography and rotational thromboelastometry

Area of Science:

• Hematology
• Clinical Pathology
• Medical Diagnostics

Background:

• Conventional coagulation assays have limitations in reflecting real-time clot dynamics and platelet contributions.
• Viscoelastic assays (VEAs), including thromboelastography and rotational thromboelastometry, offer a more complete picture of clot formation, strength, and lysis.
• VEAs assess the integrated function of platelets, fibrinogen, and coagulation factors in whole blood.

Purpose of the Study:

• To evaluate the value of VEAs in investigating coagulopathies and guiding bleeding management.
• To compare the comprehensive information provided by VEAs with the limitations of conventional coagulation assays.
• To assess the potential of VEA-guided transfusion algorithms in reducing allogeneic blood exposure.

Main Methods:

• Review of existing literature on viscoelastic assays (VEAs) and conventional coagulation assays.
• Analysis of the application of VEAs in cardiac surgery and trauma-induced coagulopathy.
• Discussion of the evidence supporting VEA-guided transfusion algorithms.

Main Results:

• VEAs provide a comprehensive assessment of clot formation, strength, and lysis, including platelet and fibrinogen contributions.
• VEA-guided algorithms show potential in reducing allogeneic blood use in cardiac surgery and trauma.
• Current popularity of VEAs in broader applications is often based on extrapolation and limitations of conventional tests.

Conclusions:

• VEAs offer significant advantages over conventional assays for evaluating coagulopathies and guiding transfusion strategies.
• Robust diagnostic studies and randomized trials are essential to validate VEA parameters and compare VEA-guided care with standard practice.
• Further research is critically needed to define the definitive role and impact of VEAs in diverse clinical settings.