Table 3.

Variations in echocardiographic parameters for the IVC at baseline, after PLR and after fluid challenge in responders and nonresponders

	Responders (n = 29)	Nonresponders (n = 30)	p
IVCmin, mm
Baseline	11 ± 5	14 ± 5	0.04
PLR	16 ± 4*	15 ± 6	0.52
Volume expansion	12 ± 5	16 ± 5*	0.004
IVCmax, mm
Baseline	17 ± 4	19 ± 4	0.07
PLR	19 ± 4	19 ± 5	0.90
Volume expansion	16 ± 4	19 ± 5	0.01
cIVC, %
Baseline	35 ± 16	27 ± 10	0.04
PLR	19 ± 10*	28 ± 18*	0.02
Volume expansion	18 ± 10*	28 ± 18*	0.02

Values are expressed as the mean ± SD

IVCmax maximum inferior vena cava diameter, PLR passive leg raising, IVCmin minimum inferior vena cava diameter, cIVC inferior vena cava collapsibility index

* = p < 0.05 vs. baseline