[Humidified high flow nasal cannula and visual laryngoscope].

To study the application value of humidified high flow nasal cannula （HHFNC） combined with visual laryngoscopy in the arytenoid cartilage dislocation. Twenty-nine patients with arytenoid cartilage dislocation were randomly double-blind into HHFNC group and general nasal catheter oxygen suction group, and the intraoperative and postoperative evaluation indicators, anesthesia-related indicators and postoperative vocal cord were compared. There were statistically significant differences in intraoperative blood oxygen saturation, microstream end-tidal carbon dioxide partial pressure EtCO₂, respiratory rate and respiratory intervention times between the two groups （<0.05）, and statistically significant differences in postoperative heart rate, oxygen saturation and respiratory rate （<0.05）. After reduction, the voice disturbance index, the degree of voice abnormality, rough voice, breath sound, powerless pronunciation and catatonic pronunciation changed significantly after operation. HHFNC combined with visual laryngoscopy in the arytenoid cartilage dislocation has high anesthetic safety, good cooperation of patients, and good surgical effect.