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Study to assess the laryngeal and pharyngeal spread of topical local anesthetic administered orally during general anesthesia in children

Background:  Topical local anesthesia of the airway of anaesthetized children has many potential benefits. In our institution, lignocaine is topically instilled blindly into the back of the mouth with the expectation that it will come into contact with the larynx. The volume and method of application varies between clinicians. There is no published evidence to support the plausibility of this technique.