• Hüseyin Uzunosmanoğlu, Emine Emektar, Seda Dağar, Şeref Kerem Çorbacıoğlu, and Yunsur Çevik.
• Kecioren Training and Research Hospital, Department of Emergency Medicine, Ankara, Turkey. Electronic address: huzunosmanoglu@gmail.com.
• Am J Emerg Med. 2020 Jun 1; 38 (6): 1159-1162.

ObjectiveThis study first aims to assess the utility of ETCO2 levels in evaluating the severity of dehydration in adult patients that present to the ED with acute gastroenteritis. AGE. Second, it intends to evaluate the correlation between ETCO2 and several metabolic parameters: creatinine, pH, bicarbonate (HCO3), and bases excessive (BE).MethodThis prospective study was conducted with AGE patients in the ED of a training and research hospital between June 2018 and April 2019 after approval of the local ethical-committee. The two groups were defined according to the severity of AGE: mild and non-mild groups. For both groups, ETCO2 levels were measured and recorded on admission of the patients.Results87 patients were included in the analyses. The median of ETCO2 values was found as lower in non-mild group than mild group; 30 (25-35) & 39 (33-34), respectively (p < 0.001). In ROC analysis for distinguishing between the both groups, the AUC value was found to be 0.988 and the best cut-off level was found as 33.5 with 95% sensitivity and 93% specificity. In addition, strong negative correlation between ETCO2 and creatinine (p < 0.001, r: -0.771) were found.ConclusionETCO2 levels decreased in the non-mild group of AGE patients; it could be useful to distinguish the mild group from the non-mild group. ETCO2 could be a reliable marker in predicting AKI in the management of AGE patients.Copyright © 2019 Elsevier Inc. All rights reserved.

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