Fig. 1

Oral to nasal endotracheal tube exchange. A A tube guide (Portex® tracheal tube guide 5CH) was inserted through the nose and grasped with Magill forceps while sharing the image of the glottis with the carer on McGrath™. The tube guide was passed adjacent to the oral tracheal tube. B The tracheal tube was passed through the tube guide and advanced close to the glottis. The oral tracheal tube was removed, and the nasotracheal tube was passed along the tube guide to the glottis