Anaesthesia
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The Ruben circle anaesthesia system was studied in the spontaneous breathing mode, and under certain conditions there was incompetence of the replaceable mushroom control valve. This causes a reverse flow of gas which results in rebreathing of expired gas when the system is used on spontaneously breathing patients. ⋯ These results were confirmed by observations on anaesthetised adult and paediatric patients during spontaneous breathing. We conclude that the system in its present form, is not suitable for use on spontaneously breathing paediatric patients.
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Two cases of acute inversion of the uterus that occurred through the uterine incision at the time of Caesarean section are described. These represent only the sixth and seventh cases reported in the literature at this time. The implications for the anaesthetist are discussed.