BACKGROUND: The clinical epidemiology of acute allergic reactions in the emergency department (ED) is uncertain. OBJECTIVES: To characterize ED visits for acute allergic reactions and to evaluate national trends in ED management. METHODS: The National Hospital Ambulatory Medical Care Survey was used to identify a nationally representative sample of ED visits between 1993 and 2004. Cases with a diagnosis of acute allergic reaction were identified by International Classification of Diseases, Ninth Revision (ICD-9) codes (9950, 9951, 9952, 9953, 9956). RESULTS: A total of 12.4 million allergy-related ED visits occurred from 1993 to 2004, representing 1.0% (95% confidence interval, 0.93%-1.10%) of all ED visits or 1.03 million ED visits per year. The number of allergy-related ED visits remained relatively stable, averaging 3.8 per 1,000 US population per year (95% confidence interval, 3.4-4.1; P for trend = .39). Although 63% of all visits were coded as urgent, only 4% required hospitalization. Anaphylaxis coding was rare (1%). ED staff prescribed medications in 87% of visits, especially histamine, blockers (62%; P for trend = .29). Increases were noted from 1993 to 2004 for corticosteroids (22% to 50%; P < .001), histamine2 blockers (7% to 18%; P < .001), and inhaled beta-agonists (2% to 6%; P = .008). Epinephrine use was infrequent and declining (19% to 7%; P = .04). CONCLUSION: Between 1993 and 2004, significant variability has occurred in ED management of acute allergic reactions.
BACKGROUND: The clinical epidemiology of acute allergic reactions in the emergency department (ED) is uncertain. OBJECTIVES: To characterize ED visits for acute allergic reactions and to evaluate national trends in ED management. METHODS: The National Hospital Ambulatory Medical Care Survey was used to identify a nationally representative sample of ED visits between 1993 and 2004. Cases with a diagnosis of acute allergic reaction were identified by International Classification of Diseases, Ninth Revision (ICD-9) codes (9950, 9951, 9952, 9953, 9956). RESULTS: A total of 12.4 million allergy-related ED visits occurred from 1993 to 2004, representing 1.0% (95% confidence interval, 0.93%-1.10%) of all ED visits or 1.03 million ED visits per year. The number of allergy-related ED visits remained relatively stable, averaging 3.8 per 1,000 US population per year (95% confidence interval, 3.4-4.1; P for trend = .39). Although 63% of all visits were coded as urgent, only 4% required hospitalization. Anaphylaxis coding was rare (1%). ED staff prescribed medications in 87% of visits, especially histamine, blockers (62%; P for trend = .29). Increases were noted from 1993 to 2004 for corticosteroids (22% to 50%; P < .001), histamine2 blockers (7% to 18%; P < .001), and inhaled beta-agonists (2% to 6%; P = .008). Epinephrine use was infrequent and declining (19% to 7%; P = .04). CONCLUSION: Between 1993 and 2004, significant variability has occurred in ED management of acute allergic reactions.
Authors: Michel Erlewyn-Lajeunesse; Sandra Dymond; Ingrid Slade; Helen L Mansfield; Rosie Fish; Owen Jones; Jonathan R Benger Journal: Drug Saf Date: 2010-01-01 Impact factor: 5.606
Authors: Veena Manivannan; Erik P Hess; Venkatesh R Bellamkonda; David M Nestler; M Fernanda Bellolio; John B Hagan; Kharmene L Sunga; Wyatt W Decker; James T C Li; Lori N Scanlan-Hanson; Samuel C Vukov; Ronna L Campbell Journal: J Allergy Clin Immunol Pract Date: 2014-02-16
Authors: Joseph J Moellman; Jonathan A Bernstein; Christopher Lindsell; Aleena Banerji; Paula J Busse; Carlos A Camargo; Sean P Collins; Timothy J Craig; William R Lumry; Richard Nowak; Jesse M Pines; Ali S Raja; Marc Riedl; Michael J Ward; Bruce L Zuraw; Deborah Diercks; Brian Hiestand; Ronna L Campbell; Sandra Schneider; Richard Sinert Journal: Acad Emerg Med Date: 2014-04 Impact factor: 3.451