1. A regional oximetry system comprising: a display; and at least one processor, the processor causing a plurality of views to be displayed on the display, each view configured to occupy at least a portion of the display, each of the views adapted to present data responsive to at least one physiological signal; a first sensor port configured to receive at least a first physiological signal representative of a regional tissue oxygenation level; a second sensor port configured to receive at least a second physiological signal representative of an arterial oxygen saturation level; wherein a first view presents a first trend graph of the first physiological signal and a second trend graph of the second physiological signal thereby defining an area between the first trend graph and the second tend graph that comprises a differential analysis of regional-to-central oxygen saturation.