Can Peripheral NIRS Predict the Response to a Fluid Challenge in Pediatric Patients: An Interventional Study

The patients will be recruited during the preoperative consultation. After inhalational induction and placement of all monitors, an intravenous access is established. After induction and securing of the airway via endotracheal tube or laryngeal mask, we note the reference values of all parameters. A pre-fluid challenge ultrasound is done, to assess the inferior vena cava distensibillity index, and the Vmax aortic peak flow velocity. After this the fluid challenge is performed. The second ultrasound measures are done after the fluid challenge. Finally an ultrasound is performed at the end of the operation, before emergence, to assess wether the standard peroperative fluid therapy has affecter these measures. NIBP, SpO2, HR, RR, NIRS values will be noted throughout the whole perioperative period. THe end-goald is to correlate the ultrasound findings to the NIRS-values, and see wether the NIRS can be used as a monitor of fluid therapy in pediatric patients.