Peripheral Venous Pressure Variation, Pulse Pressure Variation and Pleth Variability Index for Fluid Responsiveness

The peripheral venous pressure is collected by connecting a pressure transducer that is currently in use to the central venous line. In addition, pulse pressure variation and stroke volume variation that can be obtained from the arterial catheter. In addition, the pleth variability index is collected through the oxygen saturation monitoring. This extracts the medical records and bio-signal information of the subjects registered through the previously approved 'Establishment of a Bio-signal and Clinical Information Registry for the Development of Patient Monitoring Algorithms' (B-2202-738-401).