2004
DOI: 10.1590/s0034-70942004000300013
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Entropia espectral: um novo método para adequação anestésica

Abstract: RESUMO (0, e 2. Entropia de resposta (RE), que analisa as freqüências de 0,8 -47Hz (contêm componentes eletroencefalográficos-cortical e eletromiográficos-sub-cortical). CONCLUSÕES: A ativação da musculatura frontal pode i n d i c a r i n a d e q u a ç ã o d o c o m p o n e n t e s u b -c o r t i c a l (nocicepção). Esta ativação é observada como um "gap" entre SE e RE. Deste modo, é possível avaliar diretamente tanto o componente cortical (SE), como o sub-cortical (RE), p o s s i b i l i ta n d o m e l h o r… Show more

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Cited by 14 publications
(9 citation statements)
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“…Clinical signs are sensitive but less specific (Pk ranging from 0.6 to 0.9), which can result in intraoperative awakening even in the absence of tachycardia and hypertension. Therefore, several equipments have emerged aiming at improving the management of intraoperative anesthetic drugs, some of them directly measuring cerebral cortical activity (hypnosis), subcortical activity, or both 23 . Taken into account that anesthetics and anesthetic techniques themselves are able to change significantly cytokine profiles 16,24 , the findings of an association between the depth and duration of anesthesia and mortality in one year raises the plausible hypothesis of a process mediated by cytokines.…”
Section: Discussionmentioning
confidence: 99%
“…Clinical signs are sensitive but less specific (Pk ranging from 0.6 to 0.9), which can result in intraoperative awakening even in the absence of tachycardia and hypertension. Therefore, several equipments have emerged aiming at improving the management of intraoperative anesthetic drugs, some of them directly measuring cerebral cortical activity (hypnosis), subcortical activity, or both 23 . Taken into account that anesthetics and anesthetic techniques themselves are able to change significantly cytokine profiles 16,24 , the findings of an association between the depth and duration of anesthesia and mortality in one year raises the plausible hypothesis of a process mediated by cytokines.…”
Section: Discussionmentioning
confidence: 99%
“…Table 1 shows the features extracted from the EEG signals. This approach is rooted in the fundamental behaviors that trained professionals look for when manually analyzing EEG signals [ 5 8 ].…”
Section: Methodsmentioning
confidence: 99%
“…Spectral Entropy Spectral entropy is an application of the concept of entropy to the distribution of the Fourier transform and is commonly used in EEG signal processing. It is a method proposed by Rogean Rodrigues Nunes which measures irregularity, complexity or amount of EEG disorders and has been proposed as indicator of anesthetic depth of the signal [ 5 , 8 , 10 ]. SVD Entropy SVD Entropy is similarly is a measure of the irregularity and complexity of the original signal.…”
Section: Methodsmentioning
confidence: 99%
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“…Dessa forma, a partir disso, a entropia de estado, quanto menor, trará uma menor incerteza da inconsciência do paciente, e a entropia de resposta, quanto menor, trará uma menor incerteza do controle da atividade subcortical do mesmo. 10 Alguns fármacos tornaram-se frequentes para obtenção de anestesia em pacientes submetidos a cirurgias. Dentre eles, tem-se o Propofol, anestésico intravenoso de curta ação, cujo qual tem a capacidade de reduzir o fluxo sanguíneo cerebral, bem como o consumo de oxigênio pelo tecido, sendo indicado para obtenção de indução anestésica e sua manutenção, para sedação de adultos ventilados que estejam sob cuidados de terapia intensiva e para sedação consciente em procedimentos cirúrgicos e de diagnóstico.…”
Section: Introductionunclassified