Pulse pressure variations to predict fluid responsiveness: influence of tidal volume

By D. Backer, Sarah Heenen, M. Piagnerelli, M. Koch, Jean-Louis Vincent. Intensive Care Medicine, 2005

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Dynamic changes in arterial waveform derived variables and fluid responsiveness in mechanically ventilated patients: A systematic review of the literature* (2009, background): “De Backer and colleagues evaluated the influence of tidal volume on the ability of the PPV to predict fluid responsiveness (44).”
Cardiac filling pressures are not appropriate to predict hemodynamic response to volume challenge* (2007, methodology): “Fifth, the criterion used to classify patients in the responders group was an increase in cardiac index of 15%, a benchmark that was frequently used by previous investigators who expected to be far above the errors in measurement of cardiac index by thermodilution (4, 8, 22, 23).”
Hemodynamic parameters to guide fluid therapy (2011, neutral): “responsiveness [33].”