System and method for the automatic evaluation of the indexes of volemic status

摘要

The present invention refers to a system and a method for the automatic evaluation of the indexes of volemic status (Systolic Pressure Variation or SPV) in patients submitted to mechanic ventilation, starting form the analysis of the variations of the values of blood pressure. In one embodiment the system for the automatic evaluation of indexes of volemic status of a patient comprises: means suitable for submitting said patient to a preset period of apnoea and to a preset period of mechanical breathing; heart pressure probes for acquiring an analogical signal relative to the values of the blood pressure of said patient in said preset periods; an analogue/digital converter for the conversion of said analogical signals into a digital signal; means for determining the values of positive systolic peaks of said pressure; means for determining a first average value of the positive systolic peaks of said pressure in said preset period of apnoea; means for determining a second average value of the maximum positive systolic peaks of said pressure in said preset period of mechanical breathing; means for determining a third average value of the minimum positive systolic peaks of said pressure in said preset period of mechanical breathing; means for calculating a first index of volemic status equal to the difference between said second value and said first value; means for calculating a second index of volemic status equal to the difference between said third value and said first value; a display of said indexes of volemic status.