[Possibilities and limitations of thrombelastometry/-graphy]

Area of Science:

• Hemostasis and thrombosis research.
• Development and application of viscoelastic hemostasis assays.

Context:

• Thrombelastometry, particularly rotation thrombelastometry (ROTEM), offers valuable insights into clot strength and stability.
• Modified techniques, such as heparinase-modified thrombelastometry, enhance diagnostic capabilities, including heparin level estimation.
• FIBTEM analysis on ROTEM allows for the distinct assessment of plasmatic and platelet contributions to clot strength, crucial for perioperative hemostasis management.

Purpose:

• To evaluate the utility of thrombelastometry, including modified techniques and FIBTEM analysis, in assessing hemostasis, particularly in the perioperative setting.
• To investigate the role of fibrinogen and the predictive value of D-dimers for hyperfibrinolysis.
• To assess the impact of antiplatelet agents and GPIIb/IIIa antagonists on thrombelastometry results.

Summary:

• Thrombelastometry/-graphy provides critical data on clot strength and stability, with modified systems like ROTEM offering improved standardization and diagnostic information.
• Heparinase-modified thrombelastometry enables heparin level estimation, while FIBTEM analysis on ROTEM aids in differentiating plasmatic and platelet clot components, valuable for perioperative hemostasis.
• The study found no predictive value of elevated D-dimers for hyperfibrinolysis in the perioperative setting, and noted that thrombelastometry does not detect primary hemostasis disorders like von Willebrand Syndrome.

Impact:

• ROTEM provides a stable, bedside-monitoring system for hemostasis assessment.
• Understanding the limitations of thrombelastometry, such as its inability to detect primary hemostasis disorders, is crucial for accurate interpretation.
• The findings inform the management of perioperative hemostasis and the interpretation of viscoelastic hemostasis assays.