INSPIRED OXYGEN CONCENTRATIONS IN SEMICLOSED CIRCLE ABSORBER CIRCUITS WITH LOW FLOWS OF NITROUS OXIDE AND OXYGEN
نویسندگان
چکیده
منابع مشابه
Inspired oxygen concentrations in semiclosed circle absorber circuits with low flows of nitrous oxide and oxygen.
Fresh gas flows of 1-5 l./min containing oxygen concentrations of 25-50% in nitrous oxide were led into a semiclosed circle absorber circuit. The resulting inspired oxygen concentrations were measured under conditions of spontaneous respiration. The lower the fresh gas flow, the greater was the discrepancy between fresh gas and inspired oxygen concentration. No association between minute volume...
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The inspired oxygen concentration (F/O2) was changed on 43 occasions at about 30-min intervals in 13 patients during artificial ventilation with mixtures of nitrous oxide (N2O), oxygen and halothane. Ventilator settings remained unchanged for each patient and at the end of each period, samples of arterial and central venous blood (and, in six patients, pulmonary arterial blood) and inspired and...
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An oxygen concentrator based on a zeolitic molecular sieve has been used to supply piped oxygen in a District General Hospital; such oxygen contains 5% argon. If concentrator oxygen is used in the closed circuit, argon accumulates. The present investigation defines the extent and time course of argon accumulation in partially and fully closed breathing systems. A theoretical model is presented ...
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The objective of this study was to assess the changes in transcutaneous oxygen tension in pediatric patients undergoing nitrous oxide-oxygen analgesia. A total of 19 healthy patients, ranging in age from 3 to 19 years with a mean age of 9.8 years, were included. Transcutaneous oxygen monitoring was performed; following stabilization, baseline readings were obtained. Oxygen was delivered at 3 I/...
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BACKGROUND AND OBJECTIVES Few investigations have addressed the safety of oxygen from concentrators for use in anesthesia in association with nitrous oxide. This study evaluated the percent of oxygen from a concentrator in association with nitrous oxide in a semi-closed rebreathing circuit. METHODS Adult patients undergoing low risk surgery were randomly allocated into two groups, receiving a...
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ژورنال
عنوان ژورنال: British Journal of Anaesthesia
سال: 1972
ISSN: 0007-0912
DOI: 10.1093/bja/44.10.1081