r-TEG value | Definition | Interpretation |
ACT (s) | Time from start of assay to initiation of clot | Prolonged with factor deficiency or severe hemodilution |
Reaction time (min) | Time between beginning of assay and initial clot formation | Prolonged with factor deficiency or severe hemodilution |
Kinetic time (min) | Time needed to reach 20 mm clot strength | Increased with hypofibrinogenemia or platelet dysfunction |
α angle (°) | Rate or acceleration of clot formation | Decreased with hypofibrinogenemia or platelet dysfunction |
Maximum amplitude (mm) | Contribution of platelet function and platelet–fibrin interactions | Decreased with platelet dysfunction and hypofibrinogenemia |
LY-30 (%) | Amplitude reduction 30 min after achieving MA (degree of fibrinolysis) | Increased with accelerated fibrinolysis |
ACT, activated clotting time; LY-30, lysis 30 min after MA; MA, maximum amplitude; r-TEG, rapid TEG; TEG, thrombelastography.