Table 2.

Thromboelastographic reference intervals for third-trimester obstetric patients.

Parameter	Sign	Unit	Mean, SD	Reference interval
			N = 280	LL	UL
Reaction time	R	min	3.9, ±1.7	1	7
Clot kinetics	K	min	1.4, ±0.5	1	2
Angle	α	deg	70.4, ±5.8	59	82
Maximum amplitude	MA	mm	75.7, ±6.5	60	86
Time to maximum amplitude	TMA	min	23.4, ±4.7	14	33
Clot elastic strength	G	dyn/cm2	17.1, ±6	8	32
Clot elasticity constant	E	dyn/cm2	342.1, ±120.3	160	646
Amplitude at 30 min	A 30	mm	75.2, ±6.5	60	86
Clot lysis at 30 min	LY30	%	1.5, ±2	0	6
Amplitude at 30 min	A 60	mm	74.5, ±6.6	60	86
Clot lysis at 60 min	LY60	%	1.6, ±2.3	0	8

Note: Reference Interval determined with Hoffman's regression.

Abbreviations: LL, lower limit; UL, upper limit.