title: Letter: Esophageal obstruction during artificial ventilation.
mesh_terms: D004947:Esophagus; D013271:Gastric Dilatation / Q000209:etiology*; D006801:Humans; D007440:Intubation; D007442:Intubation, Intratracheal; D011015:Pneumonia, Aspiration / Q000209:etiology*; D012121:Respiration, Artificial; D012151:Resuscitation / Q000592:standards*