Evaluation of the Venous Excess Ultrasound Score (VExUS) After Circulating Volume Modification in Children.

"VExUS evaluation by ultrasound will be performed before the filling/bleeding/cleaning procedure, and again after the procedure:~* Inferior vena cava measurement in Time-Motion (TM) mode, 1-2 cm from the right atrial orifice.~* Hepatic venous Doppler measurement in pulsed Doppler mode.~* Renal vein Doppler measurement in pulsed Doppler mode. Each measurement is performed three times consecutively (to average the results), then the ultrasound measurements are compiled into a score according to the degree of doppler severity."