British journal of anaesthesia
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Multicenter Study
Major complications of central neuraxial block: report on the Third National Audit Project of the Royal College of Anaesthetists.
Serious complications of central neuraxial block (CNB) are rare. Limited information on their incidence and impact impedes clinical decision-making and patient consent. The Royal College of Anaesthetists Third National Audit Project was designed to inform this situation. ⋯ The data are reassuring and suggest that CNB has a low incidence of major complications, many of which resolve within 6 months.
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Prediction of movement responses to noxious stimuli during anaesthesia is of clinical importance. Susceptibility of a parameter of immobility to both hypnotic and analgesic influences could pose an advantage. Here, nociceptive reflexes might be useful, but data regarding the suppression by hypnotic substances are scarce. Therefore, we compared the prediction of movement responses by the RIII reflex threshold and the bispectral index (BIS) during propofol mono-anaesthesia. ⋯ Movement responses to noxious stimuli under propofol can be predicted by the RIII threshold with a comparable accuracy as the BIS. Therefore, the RIII threshold seems to be influenced by hypnotic effects. Since susceptibility of the RIII threshold to analgesic influences is well established, an advantage for the RIII threshold in the prediction of motor responses could be expected when analgesic substances are used in addition to propofol.
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Randomized Controlled Trial Comparative Study
Comparative study of topical anaesthesia with lidocaine 2% vs levobupivacaine 0.75% in cataract surgery.
This study compared the efficacy of topical anaesthesia with levobupivacaine 0.75% vs lidocaine 2% during cataract surgery by phacoemulsification. ⋯ Topical anaesthesia with levobupivacaine 0.75% was more effective than lidocaine 2% in preventing pain and improving patient and surgeon comfort during cataract surgery, with similar toxicity.
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Entropy is an anaesthetic EEG monitoring method, calculating two numerical parameters: State Entropy (SE, range 0-91) and Response Entropy (RE, range 0-100). Low Entropy numbers indicate unconsciousness. SE uses the frequency range 0.8-32 Hz, representing predominantly the EEG activity. RE is calculated at 0.8-47 Hz, consisting of both EEG and facial EMG. RE-SE difference (RE-SE) can indicate EMG, reflecting nociception. We studied RE-SE and EMG in patients anaesthetized without neuromuscular blockers. ⋯ Increased RE is followed by increased SE at nociceptive stimuli in patients not receiving neuromuscular blockers. Owing to their overlapping power spectra, the contribution of EMG and EEG cannot be accurately separated with frequency analysis in the range of 10-40 Hz.