Prospective Validation of Intraoperative Blood Pressure Monitors

This observational study aims to identify the incidence and importance of discrepancies between measurements of intraoperative invasive and noninvasive blood pressure monitoring in patients undergoing non-cardiac surgeries under general anesthesia . The main questions it aims to answer are : * The importance of the differences, in mmHg, between the non-invasive and invasive blood pressure measurements (NIBP-IBP) on systolic, diastolic and mean arterial pressure. * Identify the predictive factors associated with these differences.