Normal Thromboelastogram - Specific parameters represent the 3 phases of the cell-based model of haemostasis: initiation, amplification, and propagation

-R value = reaction time (s); time of latency from start of test to initial fibrin formation (amplitude of 2mm); i.e. initiation
-K = kinetics (s); time taken to achieve a certain level of clot strength (amplitude of 20mm); i.e. amplification
-alpha = angle (slope between R and K); measures the speed at which fibrin build up and cross linking takes place, hence assesses the rate of clot formation; i.e. thrombin burst
-TMA = time to maximum amplitude(s)
-MA = maximum amplitude (mm); represents the ultimate strength of the fibrin clot; i.e. overall stability of the clot
-A30 or LY30 = amplitude at 30 minutes; percentage decrease in amplitude at 30 minutes post-MA and gives measure of degree of fibrinolysis
-CLT = clot lysis time (s)

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