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  • Title: Breath analyzer screening of emergency department patients suspected of alcohol intoxication.
    Author: Sebbane M, Claret PG, Jreige R, Dumont R, Lefebvre S, Rubenovitch J, Mercier G, Eledjam JJ, de la Coussaye JE.
    Journal: J Emerg Med; 2012 Oct; 43(4):747-53. PubMed ID: 22406024.
    Abstract:
    BACKGROUND: Acute alcohol intoxication is a frequent cause of emergency department (ED) visits. Evaluating a patient's alcohol intoxication is commonly based on both a physical examination and determination of blood alcohol concentration (BAC). OBJECTIVE: To demonstrate the feasibility and usefulness of using a last-generation infrared breath analyzer as a non-invasive and rapid screening tool for alcohol intoxication in the ED. METHODS: Adult patients suspected of acute alcohol intoxication were prospectively enrolled over 10 days. Breath alcohol concentrations (BrAC) were measured using a handheld infrared breath analyzer. BAC was determined simultaneously by automated enzymatic analysis of a venous blood sample. The relationship between BAC and BrAC values was examined by both linear regression and Bland-Altman analysis. RESULTS: The study included 54 patients (mean age 40±14 years, sex ratio M/F of 3/1). Breath and blood alcohol concentrations ranged from 0 to 1.44 mg/L and from 0 to 4.40 g/L (0-440 mg/dL), respectively. The mean individual BAC/BrAC ratio was 2615±387, 95% confidence interval 2509-2714, which is 30% higher than the legal ratio in France (2000). The correlation between both measurements was excellent: r=0.95 (0.92-0.97). Linear regression revealed BAC=0.026+1.29 (BrAC×2000) and BAC=0.026+0.99 (BrAC×2615). Mean BAC-BrAC differences and limits of agreement were 0.49 g/L [-0.35, 1.34] (or 49 mg/dL [-35, 134] and 0.01 g/L [-0.68, 0.71] (or 1 mg/dL [-68, 71]), for the 2000 and 2615 ratios, respectively. CONCLUSION: The calculated conversion coefficient provided a satisfactory determination of blood alcohol concentration. Breath alcohol testing, using appropriate BAC/BrAC conversion, different from the legal BAC/BrAC, could be a reliable alternative for routine screening and management of alcohol intoxication in the ED.
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