Background: Fluid management in anesthesiology during the transanesthetic period is of vital importance. It represents a challenge for the anesthesiologist, especially in patients who are not hemodynamically stable. Objective: To report the correlation between the vena cava collapsibility index and the hemodynamic stability of patients under general anesthesia during the transoperative period Methods: The data were coded and stored in the Microsoft Excel software and analyzed using the SPSS version 17 software. The statistical significance was defined as a P value <0.05. Frequency, central tendency and dispersion measures were used. To assess the correlation of the numerical variables (Bleeding and VCI) the Pearson linear correlation coefficient test was used. The coefficient of determination was calculated, and for the association of qualitative variables, the χ2 test was used. A p less than 0.05 was considered significant, with a confidence level of 95% and an alpha error of 5. Conclusions: In this study it can be determined that it is important to use ultrasound for fluid control in anesthesiology.
