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Detection of gamma hydroxybutyrate in emergency department

Background: Many patients present to emergency departments (EDs) with an altered state of consciousness. Fast exclusion of gamma hydroxybutyrate (GHB)-associated intoxication in these patients may optimize diagnostic and therapeutic algorithms and decisions in the ED. Methods: Between January and March 2014, a novel enzymatic test system was used to quantify GHB in blood and urine samples of suspected intoxicated patients in the ED of the University Hospital. The underlying causes for suspected intoxication and the diagnostic and therapeutic measures were documented and analysed retrospectively. Results: GHB measurements were performed in 13 patients with suspected ingestion during a 3-month study period. GHB was positive in six patients showing serum levels between 61.8 mg/l and 254.8 mg/l, and GHB was tested negative in seven patients with a range of 0.3–6.2 mg/l (upper reference limit 6.1 mg/l). Additional intoxication was found in five of six GHB positive (83%, alcohol n = 2 and other drugs n = 5) and in six of seven negative-tested patients (86%, alcohol n = 5 and other drugs n = 1). Conclusion: GHB quantification in the ED provides specific additional information for intoxication, which can lead to more precise diagnostic and therapeutic decisions and may also be important for legal aspects. We believe that GHB analysis in unconscious patients with suspected intoxication may improve the efficient treatment of intoxicated patients.