• José Gregorio Zorrilla Riveiro, Anna Arnau Bartés, Dolors García Pérez, Ramón Rafat Sellarés, Arantxa Mas Serra, and Rafael Fernández Fernández.
• Servicio de Urgencias y Emergencias, Althaia Xarxa Assistencial Universitaria de Manresa, Barcelona España. Universitat Internacional de Catalunya (UIC), Sant Cugat del Vallès, Barcelona, España. Unidad de Cuidados Intensivos, Hospital Sant Joan Despi Moisés Broggi, Barcelona, España.
• Emergencias. 2015 Feb 1; 27 (1): 27-33.

ObjectivesTo determine whether the presence of nasal flaring is a clinical sign of severity and a predictor of hospital mortality in emergency patients with dyspnea.Material And MethodsProspective, observational, single-center study. We enrolled patients older than 15 years of age who required attention for dyspnea categorized as level II or III emergencies according to the Andorran Medical Triage system. Two observers evaluated the presence of nasal flaring. We recorded demographic and clinical variables, including respiratory effort, vital signs, arterial blood gases, and clinical course (hospital admission and mortality). Bivariable analysis was performed and multivariable logistic regression models were constructed.ResultsWe enrolled 246 patients with a mean (SD) age of 77 (13) years; 52% were female. Nasal flaring was present in 19.5%. Patients with nasal flaring had triage levels indicating greater severity and they had more severe tachypnea, worse oxygenation, and greater acidosis and hypercapnia. Bivariable analysis detected that the following variables were associated with mortality: age (odds ratio [OR], 1.05; 95% CI, 1.01-1.10), prehospital care from the emergency medical service (OR, 3.97; 95% CI, 1.39-11.39), triage level II (OR, 4.19; 95% CI, 1.63-10.78), signs of respiratory effort such as nasal flaring (OR, 3.79; 95% CI, 1.65-8.69), presence of acidosis (OR, 7.09; 95% CI, 2.97-16.94), and hypercapnia (OR, 2.67; 95% CI, 1,11-6,45). The factors that remained independent predictors of mortality in the multivariable analysis were age, severity (triage level), and nasal flaring.ConclusionIn patients requiring emergency care for dyspnea, nasal flaring is a clinical sign of severity and a predictor of mortality.

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