Abstract
Introduction: Passive leg raising (PLR) is a simple reversible maneuver mimicking a fluid bolus by increasing intrathoracic blood volume. This study determined if PLR could predict fluid responsiveness through its hemodynamic effects on cardiac output (CO) and the noninvasive plethysmographic variability index (PVI) in isoflurane-anesthetized pigs undergoing hemorrhage followed by volume replacement (VR).
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