1. Normal reference values for ROTEM and TEG.

	TEG	ROTEM
Clotting time (period to 2 mm amplitude)	R (reaction time) N (whole blood) 4 to 8 min N (Cit, kaolin) 3 to 8 min	CT (clotting time) N (Cit, INTEM) 137 to 246 s N (Cit, EXTEM) 42 to 74 s
Clot kinetics (period from 2 to 20 mm amplitude)	K (kinetics) N (WB) 1 to 4 min N (Cit, kaolin) 1 to 3 min	CFT (clot formation time) N (Cit, INTEM) 40 to 100 s N (Cit, EXTEM) 46 to 148 s
Alpha angle (clot strengthening)	α (slope between r and k) N (WB) 47° to 74° N (Cit, kaolin) 55° to 78°	α (slope of tangent at 2 mm amplitude) N (Cit, INTEM) 71° to 82° N (Cit, EXTEM) 63° to 81°
Amplitude (at set time)	A or CA	A or CA
Maximum strength	MA (maximum amplitude) N (WB) 55 to 73 mm N (Cit, kaolin) 51 to 69 mm	MCF (maximum clot firmness) N (Cit, INTEM) 52 to 72 mm N (Cit, EXTEM) 49 to 71 mm N (Cit, FIBTEM) 9 to 25 mm
Lysis (at fixed time)	CL30, CL60	LY30, LY60

TEG: N = normal values for kaolin‐activated TEG in native whole blood (WB) or citrated and recalcified blood samples (Cit)
 ROTEM: N = normal values for contact (partial thromboplastin phospholipids, INTEM), tissue factor (EXTEM) and tissue factor plus platelet inhibitor cytochalasin D (FIBTEM) activated citrated and recalcified blood samples
 Reference values depend on reference population, blood sampling technique, other preanalytical factors, and coagulation activator (Ganter 2008)
 min: minute(s)