Does the Response to a Mini-fluid Challenge of 3ml/kg in 2 Minutes Predict Fluid Responsiveness for Pediatric Patient?

fluid challenge realized after induction of anesthesia at a steady state, to assess fluid responsiveness and correct hypovolemia. The usual fluid bolus of 15ml/kg in 10 minute will be fragmented in 2 fluid boluses (3ml/kg in 2 minutes followed by measurement of hemodynamic parameter after 1 minute of the end of the 1st fluid bolus and followed by 12 ml/kg in 8 minutes then followed by measurement of hemodynamic parameters after one minute after the end of the 2nd fluid fragmented fluid challenge. Total administered: 15 ml/kg in 11 minutes. end of the study at 12 minutes.