Using an expiratory resistor, arterial pulse pressure variations predict fluid responsiveness during spontaneous breathing: an experimental porcine study

Table 3 Correlation of systolic pressure variation and pulse pressure variation versus the change in stroke volume

	Systolic pressure variation	Pulse pressure variation
No resistor	0.37	0.37
Inspiratory resistor	0.45	0.36
Expiratory resistor	0.83	0.52
Inspiratory/expiratory resistor	0.50	0.31

Data presented as R² values obtained by linear regression for systolic pressure variation or pulse pressure variation versus the increase in stroke volume by a subsequent fluid loading with no resistor and with the inspiratory, expiratory, and inspiratory/expiratory resistors.

ISSN: 1364-8535