Paediatric Adenotonsillectomy for OSA

You have been asked to take over an elective list at a tertiary paediatric hospital as the regular anaesthetist is delayed in the postanaesthesia care unit by a postoperative airway event. The next patient is a five-year-old First Nations boy (weight 28 kg) from a regional centre who is accompanied by his grandmother who is his legal guardian. He is booked for adenotonsillectomy for the management of obstructive sleep apnoea. His surgery was previously cancelled three months ago. The anaesthetist had just administered ketamine and midazolam premedication to this child when he was called away.