British journal of anaesthesia
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Randomized Controlled Trial Clinical Trial
Warming by resistive heating maintains perioperative normothermia as well as forced air heating.
Even mild perioperative hypothermia is associated with several severe adverse effects. Resistive heating has possible advantages compared with other active warming systems because it can heat several fields independently. To assess this new warming system, we measured core temperature in patients during surgery who were warmed with circulating water mattresses, forced air covers or resistive heating covers. ⋯ Resistive heating maintains core body temperature as well as forced air heating and both are better than circulating water. Resistive heating offers the advantage of adjustable heating pods.
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Randomized Controlled Trial Clinical Trial
Relationship between awareness and middle latency auditory evoked responses during surgical anaesthesia.
Some studies support the view that meaningful auditory input can be processed by the brain during apparent surgical anaesthesia. Consequently, patients may be able to remember some information implicitly after anaesthesia as well through a 'dream-like process' (subconscious awareness). The aim of this study was to investigate the presence of subconscious awareness during anaesthesia and to examine its relationship to the mid-latency auditory evoked responses (MLAERs). ⋯ MLAERs may help to predict subconscious cerebral processing of auditory inputs during anaesthesia.
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Randomized Controlled Trial Clinical Trial
Propofol sparing effect of remifentanil using closed-loop anaesthesia.
General anaesthesia is a balance between hypnosis and analgesia. We investigated whether an increase in remifentanil blood concentration would reduce the amount of propofol required to maintain a comparable level of anaesthesia in 60 patients undergoing ambulatory surgery. ⋯ This study confirms a synergistic interaction between remifentanil and propofol during surgery, whereas the contribution of remifentanil in the absence of stimulation seems limited. In addition, our results suggest that the propofol effect site concentration provides a guide to the value at which the patient recovers consciousness.