British journal of anaesthesia
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Randomized Controlled Trial
Effects of remifentanil-based general anaesthesia with propofol or sevoflurane on muscle microcirculation as assessed by near-infrared spectroscopy.
Although anaesthetics are known to alter microcirculation no study has, to our knowledge, documented changes in human skeletal microcirculatory function during general anaesthesia. ⋯ Remifentanil-based general anaesthesia with propofol or sevoflurane altered the muscle microcirculation in different ways. Quantitative NIRS, a technique that takes into account the optical tissue properties of the individual subject, can effectively measure these changes non-invasively.
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Randomized Controlled Trial
Effect of landiolol on bispectral index and spectral entropy responses to tracheal intubation during propofol anaesthesia.
beta1-Adrenoceptor antagonists suppress the haemodynamic and arousal responses to tracheal intubation. The Entropy Module shows two spectral entropy-based indices, response entropy (RE) and state entropy (SE). The difference between RE and SE (RE-SE) may reflect nociception during general anaesthesia. In the present study, we investigated the effect of landiolol on entropy indices in response to tracheal intubation. ⋯ RE increased in response to tracheal intubation, whereas BIS and SE did not. Landiolol and remifentanil suppressed the increase in RE after tracheal intubation with significant inhibition of RE-SE difference.
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Randomized Controlled Trial Comparative Study
I.V. ropivacaine compared with lidocaine for the treatment of tinnitus.
I.V. lidocaine has been used to ameliorate tinnitus, but in general its effect has been limited. The longer acting local anaesthetic ropivacaine may be more effective. ⋯ Temporary clinically significant alleviation of tinnitus was observed only in a few individuals after both i.v. ropivacaine and lidocaine. The toxicity of ropivacaine limits its usefulness.
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Randomized Controlled Trial
Influence of systolic-pressure-variation-guided intraoperative fluid management on organ function and oxygen transport.
Dynamic variables, for example, systolic pressure variation (SPV), are superior to filling pressures for assessing fluid responsiveness. We analysed the effects of SPV-guided intraoperative fluid management on organ function and perfusion when compared with routine care. ⋯ In comparison with routine care, intraoperative SPV-guided treatment was associated with slightly increased fluid adminstration whereas organ perfusion and function was similar.
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Randomized Controlled Trial
Influence of the anaesthetic depth on the inhibition of the oculocardiac reflex during sevoflurane anaesthesia for paediatric strabismus surgery.
It remains controversial whether the anaesthetic depth as assessed by bispectral index (BIS) influences the oculocardiac reflex (OCR) during strabismus surgery. We investigated whether BIS-guided sevoflurane titration may help to optimize the anaesthetic depth for inhibition of the OCR during paediatric strabismus surgery. ⋯ We confirmed that OCR is relevant to the depth of anaesthesia. BIS values of 40-50 seem adequate for the inhibition of OCR. The results suggest that BIS may be a valuable tool during sevoflurane anaesthesia for strabismus surgery in children.