Impact of topical lignocaine on the incidence of perioperative respiratory complications in children undergoing laryngo-tracheo-bronchoscopies – a double blind randomised controlled pilot study

Topical lignocaine vs. placebo onto vocal cords for a laryngo-tracheo-bronchoscopy. The lignocaine is applied directly following induction of anaesthesia. It is only applied once which takes one spray of lignocaine of 5-10 seconds duration. The lignocaine dose used will be a maximum of 4 mg/kg as topical spray (under vision) onto the vocal cords. For this trial, lignocaine 4% will be used in all children. In children > 30 kg 3 ml of lignocaine 4% will be applied.