Immature/total granulocyte ratio: A promising tool to assess the severity and the outcome of post-cardiac arrest syndrome |
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Authors: | Bertrand Sauneuf Claire Bouffard Edouard Cornet Cédric Daubin Isabelle Desmeulles Romain Masson Amélie Seguin Xavier Valette Nicolas Terzi Jean-Jacques Parienti Damien du Cheyron |
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Institution: | 1. Service de Réanimation Médicale, Centre Hospitalier Universitaire de Caen, Avenue de la Côte de Nacre, F-14033 Caen, France;2. Laboratoire d’Hématologie, Centre Hospitalier Universitaire de Caen, Avenue de la Côte de Nacre, F-14033 Caen, France;3. Unité de Biostatistique et de Recherche Clinique, Centre Hospitalier Universitaire de Caen, Avenue de la Côte de Nacre, F-14033 Caen, France;4. Faculté de Médecine, Université de Caen Basse-Normandie, EA 4652 – MILPAT, équipe MICAH, France;5. Inserm, U 1075 COMETE, F-14032 Caen, France;6. Faculté de Médecine, Université de Caen Basse-Normandie, EA 4655 U2RM, F-14032 Caen, France;g Faculté de Médecine, Université de Caen Basse-Normandie, F-14032 Caen, France |
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Abstract: | BackgroundThe immature/total granulocyte (I/T-G) ratio increases during severe systemic inflammatory response syndrome. This study evaluated the I/T-G ratio as a predictor of poor outcome after out-of-hospital cardiac arrest (OHCA).MethodsWe conducted a pilot prospective cohort study of patients who were admitted in our intensive care unit (ICU) during a one-year period after post-OHCA resuscitation. I/T-G ratio measurements were obtained from blood samples collected on admission using flow cytometry and the outcomes were ICU mortality and post-cardiac arrest syndrome.ResultsAmong the 130 patients (76% male, median age 54 46–67] years), the median I/T-G ratio was 0.85 0.42–1.98]%. The I/T-G ratio was poorly correlated with the SOFA score and lactate level on day 1 (r = 0.25, p = 0.005 and r = 0.5, p < 0.001, respectively). Patients with high I/T-G ratios were more likely to develop post-resuscitation shock (37% vs. 58%, p = 0.02). Patients dying from post-resuscitation shock had a higher I/T-G ratio than patients dying from neurological causes (2 1–4]% vs. 1.2 0.6–1.2]%, p = 0.02). The area under the ROC curve based on the I/T-G ratio was 0.82 for predicting ICU mortality.ConclusionThe I/T-G ratio appears to be an accurate predictor of poor outcome. However, the added clinical value of this marker and the possible involvement of immature granulocytes in the pathophysiology of post-cardiac arrest syndrome remain to be investigated. |
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Keywords: | Cardiac arrest Immature granulocytes Prognosis |
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