Anaesthesia
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A new design of keyed filler with a dead space of 1.1 ml was used with 50 bottles of isoflurane to fill vaporizers. The volume of isoflurane remaining in the 'empty' bottle, the residual volume, was measured. The trial was repeated using the old style filler which has a dead space of 3.3 ml. The new filler reduced the mean residual volume by 73% but still did not completely empty the bottle.
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We performed a questionnaire survey to establish the current and intended practice of chair dental anaesthesia amongst recently appointed consultants, and senior registrars within the Mersey Region. Only 26% of the consultants surveyed practised chair dental anaesthesia, however, more consultants would have had their anaesthetic sessions allowed. Consultants performed 4.62 +/- 3.5 sessions per month and anaesthetised 8.0 +/- 2.27 patients per session. ⋯ Sixty-eight per cent of senior registrars declared an interest in chair dental anaesthesia. This group had received significantly more training (p < 0.005) in dental anaesthesia than those with no interest. Most anaesthetists (52/71) felt that chair dental anaesthesia was acceptable in centres approved to Poswillo standards; 16 anaesthetists felt that it should be confined to a hospital environment and three felt that it should not be performed at all.