Correlation of SCVCI Value with Pre-anesthesia Fluid volume
subclavian vein collapsibility
There was a positive correlation between the SCVCI value and the pre-anesthesia fluid volume (R = 0.885, p < 0.001) (Fig. 
Correlation analysis between SCVCI (expressed as a percentage) and pre-anesthesia fluid amount (expressed in mL). This correlation was probably explained in part by the study design. An increase in SCVCI is correlated with an administration of fluid. SCVCI, subclavian vein collapsibility index