• Salvatore Pala, Federico Aletti, Nicola Toschi, Maria Guerrisi, Filadelfo Coniglione, Mario Dauri, Giuseppe Baselli, and Manuela Ferrario.
• Dipartimento di Bioingegneria, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy. manuela.ferrario@polimi.it
• Conf Proc IEEE Eng Med Biol Soc. 2012 Jan 1;2012:3128-30.

AbstractThe majority of studies on fluid responsiveness is focused on volume expansion maneuvers in intensive care unit (ICU), while fewer studies have analyzed the same problem during major surgery. Among them, the results are contrasting. The aim of this work was to compare the performance of different hemodynamic indices in the prediction of cardiac output variations following fast fluid infusion. The study was limited to a particular type of major surgery, i.e. liver transplantation and hepatectomy. Our results showed that pulse pressure variation (PPV) estimated according to the definition, i.e. within single respiratory cycles, and PPV estimated by PiCCO monitor system are coherent and very similar. Moreover, PPV and stroke volume variation (SVV) produced good values of sensitivity and specificity in separating the subjects into responsive and non responsive to maneuvers.

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