EEG-guided Propofol Sedation Versus Standard Care for Oesophagogastroduodenoscopy and Colonoscopy in Children

The goal of this clinical trial is to compare electroencephalogram (EEG) guided propofol sedation versus standard care in paediatric patients aged 6-16 undergoing oesophagogastroduodenoscopy and colonoscopy. The main questions it aims to answer are whether EEG guided propofol sedation will result in: * faster wake up time * reduced time to discharge * reduced cumulative propofol dosage * lower incidence of intraoperative adverse events * no difference in intraoperative undesirable movement * lower incidence and severity of emergence delirium * lower intraoperative depth of sedation Participants will wear an EEG sensor (Sedline) prior to undergoing propofol sedation until they wake up post procedure.