Resumo

MONTOYA PEDRON, Arquímedes et al. Evaluation of the effectiveness of the quantitative electroencephalogram parameters in the measurement of the anesthetic depth level. MEDISAN [online]. 2014, vol.18, n.3, pp. 301-317. ISSN 1029-3019.

Introduction: the depth level measurement methods of the hypnotic effect of anesthetic drugs, from the quantitative analysis of the electroencephalogram, need to be corrected and optimized to guarantee their efficient application in the clinical practice. Objective: to evaluate the effects of the anesthetic depth level and of the record derivation in the parameters of the quantitative electroencephalogram, to guarantee the selection of optimal parameters in the classification of the anesthetic depth level. Methods: a sample of 29 adults with abdominal disorders, surgically treated through endoscopy, under general anaesthesia was studied. The electroencephalographic record was carried out by means of a 19 channels assembly and the level of anesthetic depth was clinically quantified by means of an 8 levels scale. Equally, the parameters of the quantitative electroencephalogram were calculated by means of the analysis system of the Medicid 5 equipment of Neuronic. Results: the level of anesthetic depth presented a significant effect in the parameters of the quantitative electroencephalogram, in the spectral models of broad and narrow band. Among the parameters with more significance there were: the absolute power delta, theta, the relative power theta and the mean frequency theta, alpha and total; while in the narrow band parameters a significant effect was obtained in all derivations, with a significant interaction between the topography and the anesthetic depth level. Conclusions: the parameters of the quantitative electroencephalogram can be used in an effective way in the prediction of the anesthetic depth level, with a higher resolution in the classification levels than those used up to now. Also, the selective effect of the hypnotic agents was confirmed in the different cortical areas

Palavras-chave : anesthetic depth level; quantitative electroencephalogram; electroencephalogram parameters.

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