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Percorrer por autor "Santos, I. A."

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  • Hydroxyethyl starch 130/0.4 can be useful to prevent a hemodynamic response to a single dose of remifentanil
    Publication . Ferreira, D. A.; Santos, I. A.; Nunes, Catarina S.; Amorim, Pedro; Antunes, L. M.
    El propofol y el remifentanilo se utilizan frecuentemente para la anestesia intravenosa. El uso combinado de las dos drogas tiende a causar depresión hemodinámica. Describimos, en dos pacientes, la ausencia de efectos hemodinámicos en respuesta a la administración de propofol y remifentanilo al combinarlo con la infusión de hidroxietilalmidón (HES) 130/0,4. Durante la inducción de la anestesia y debido a la necesidad de reponer el volumen sanguíneo, dos pacientes de 62 y 65 años recibieron una solución intravenosa de HES 130/0,4. A continuación, les fue administrado un bolus de 2 µg Kg–1 de remifentanilo bajo anestesia intravenosa total (TIVA) con propofol y remifentanilo, antes de la colocación del cabezal de Mayfield®. No observamos cambios en la presión arterial media ni en la frecuencia cardiaca como respuesta al bolus de remifentanilo en los pacientes que recibieron HES 130/0,4 bajo TIVA con propofol y remifentanilo. El HES 130/0,4 puede tener un papel activo en la prevención de la respuesta hemodinámica al remifentanilo al combinarlo con propofol. Para confirmar estos resultados es necesario realizar un estudio randomizado.
    2005-11Artigo científico Acesso restrito Ver mais
  • The effect of a remifentanil bolus on the bispectral index of the EEG (BIS) in anaesthetized patients independently from intubation and surgical stimuli
    Publication . Ferreira, D. A.; Nunes, Catarina S.; Antunes, L. M.; Santos, I. A.; Lobo, F.; Casal, M.; Ferreira, L.; Amorim, Pedro
    Background and objective: Remifentanil boluses are used in different clinical situations and the effects on bispectral index monitoring are unclear. We analysed the effect of a remifentanil bolus on the bispectral index of the electroencephalogram (bispectral index) under total intravenous anaesthesia with propofol and remifentanil. Methods: ASA I–III patients were included in this study. All patients received a 2 µg kg 1 remifentanil bolus in a period free from stimuli. Bispectral index and haemodynamic data were collected from an A-2000XP bispectral index monitor (every second) and an AS/3 Datex monitor (every 5 s). Bispectral index data were analysed using the area under the curve. Mean arterial pressure and heart rate were averaged at each 30-s period and analysed using analysis of variance. Results: A total of 240 bispectral index values were obtained per patient. The area under the curve between 90 and 120 s after the bolus was significantly lower than the basal area under the curve (average of all areas before the bolus, P 0.05). Mean arterial pressure and heart rate were significantly reduced from 96.4 19.9 mmHg at the time of the bolus to 74.2 16.6 mmHg 120 s after, and from 70 16.4 bpm at the time of the bolus to 61 13.6 bpm after (P 0.001), respectively. Conclusions: There was a significant reduction in the areas under the curve between 90–120 s following the bolus. Heart rate and blood pressure also showed significant reductions. Thus, remifentanil bolus given under total intravenous anaesthesia with propofol and remifentanil decreases bispectral index, an effect independent of intubation and surgical stimuli.
    2006Artigo científico Acesso aberto Ver mais