Σφακιανάκης Αλέξανδρος
ΩτοΡινοΛαρυγγολόγος
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00306932607174
alsfakia@gmail.com

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Σάββατο 11 Νοεμβρίου 2017

20. Not only the absence but also amplitude reduction of cortical SEPs predict ominous outcome in comatose patients after cardiac arrest

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Publication date: December 2017
Source:Clinical Neurophysiology, Volume 128, Issue 12
Author(s): R. Carrai, A. Grippo, F. Lolli, M. Spalletti, M. Scarpino, C. Ielapi, G. Lanzo, A. Peris, G. Cianchi, G. Olivo, S. Valente, A. Amantini
In comatose patients after cardiac arrest (CA) bilateral absence of cortical SEPs is a high reliable predictor of poor outcome but it is present in no more than 40%. Low amplitude pathological SEPs were found in 28.9% of subjects but only few papers analysed the prognostic significance of this pattern.To evaluated prognostic value of N20-P25 amplitude of SEPs, recorded at 6–12h after CA.Retrospectively, we analysed comatose patients after CA admitted to our hospital. SEPs were recorded at 6–12hs after CA. We determined the lowest SEP amplitude in a subject that recovery consciousness We evaluated the accuracy of SEP amplitude in predicting the "no consciousness recovery" by ROC curves. Outcome was evaluated at 6months by GOS.One-hundred and eighteen patients were analysed. None of subjects with N20-P25 amplitude less than 1.2μV recovered consciousness. The area under the ROC curves was 0.96 for "no consciousness recovery". SEP amplitude threshold determined by ROC analysis was 1.21μV. For this SEP amplitude threshold, we found a sensibility: 85.9% and specificity: 100.0%.Not only the absence but also the amplitude reduction (less than 1.2μV) of N20-P25 is associated with no consciousness recovery with very high predictive value.



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