Fig. 9. Schematic overview of measurements during cardiothoracic surgery. After cannulation of the radial artery and application of the Nexfin, invasive and noninvasive blood pressures were recorded. Nexfin was allowed to stabilize until the interval between Physicals was 50 or greater and analyses were started following flushing of the arterial line. The analyzed data can include periods before and after induction of anesthesia. Measurements were included irrespective of pharmacological hemodynamic management or surgical procedures.