[Utility of heliox during treatment of upper airway obstruction secondary to bilateral vocal cord paralysis after thyroidectomy].

Helium is a noble gas whose low density decreases airway resistance. This property is utilized when a mixture of helium and oxygen (heliox) is employed in certain clinical situations, particularly in the context of airway obstruction. We report the case of a woman with severe upper airway obstruction due to bilateral vocal cord paralysis after thyroidectomy. Heliox was used temporarily to reduce respiratory effort and avoid the need for tracheal intubation while the obstruction was being treated with antiinflammatory drugs.