Revista brasileira de anestesiologia
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Rev Bras Anestesiol · Jun 2004
[Continuous epidural analgesia: analysis of efficacy, side effects and risk factors.].
Epidural analgesia with local anesthetics and opioids has a reputation of high efficacy with low incidence of side effects. This study aimed at determining incidence, type and severity of postoperative complications related to epidural analgesia and catheter insertion. ⋯ Continuous epidural analgesia is effective and safe. Complications were not severe. However, strict vigilance is mandatory to achieve satisfactory analgesia and a low incidence of complications.
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Rev Bras Anestesiol · Jun 2004
[Volume and pressure of tracheal tube cuffs filled with air or nitrous oxide.].
Tracheal tube cuff pressure against tracheal wall should to prevent air leaked or pulmonary aspiration, allowing adequate capillary blood flow. This study aimed at determining pressure variations of tracheal tube cuffs filled with air or 100% nitrous oxide. ⋯ 100% nitrous oxide to fill tracheal tube cuffs is not a safe method resulting in progressive air leakage. The cuff air promotes volume and pressure increase, with higher chances for tracheal mucosa injury.
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Rev Bras Anestesiol · Jun 2004
[Effects of pneumoperitoneum on renal hemodynamics and function of dogs under volume and pressure-controlled ventilation.].
There are no studies associating ventilatory mode effects on renal repercussions during pneumoperitoneum. This study aimed at evaluating pneumoperitoneum-induced renal hemodynamics and function changes in dogs under volume and pressure controlled ventilation. ⋯ Ventilatory modes have not promoted renal hemodynamic differences between groups. Pneumoperitoneum, by compressing renal parenchyma, may have determined changes in potassium reabsorption and/or secretion.
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Though universally employed, clinical signs to evaluate anesthetic adequacy are not reliable. Over the past years several pieces of equipment have been devised to improve intraoperative handling of anesthetic drugs, some of them directly measuring cerebral cortical activity (hypnosis). None of them, however, has offered the possibility of directly evaluating sub-cortical activity (motor response). ⋯ Frontal muscles activation may indicate inadequacy of the subcortical component (nociception). Such activation appears as a gap between SE and RE. This, it is possible to directly evaluate both cortical (SE) and subcortical (RE) components providing better anesthetic adequacy.
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Rev Bras Anestesiol · Jun 2004
[Relationship between dexmedetomidine continuous infusion and end-tidal sevoflurane concentration, monitored by bispectral analysis.].
General inhalational anesthesia associated with intravenous agents provides analgesia and hypnosis of better quality. Dexmedetomidine is a specific a2-adrenergic agonist with these characteristics and is known by providing hemodynamic stability. This study aimed at evaluating the effects of dexmedetomidine continuous infusion on end-tidal sevoflurane concentration (ETsevo) in general anesthesia, monitored by EEG spectral index (BIS). ⋯ The association of dexmedetomidine continuous infusion (0,5 microg.kg-1.h-1) to inhalational anesthesia with sevoflurane provided end-tidal sevoflurane concentration decrease while maintaining hemodynamic stability.