A robust Fourier-based method to measure pulse pressure variability

To propose a new method to estimate pulse pressure variability (PPV) in the arterial blood pressure waveform.Traditional techniques of calculating PPV using peak finding have a fundamental flaw that prevents them from accurately resolving PPV for small tidal volumes, limiting the use of PPV to only mechanical ventilated patients. The improved method described here addresses this limitation using Fourier analysis of an oscillatory signal that...