منابع مشابه
Isoflurane in a circle system with low gas flow.
Isoflurane was administered from a Goldman vaporizer to a circle breathing system with low fresh gas flows. The uptake and vapour concentration of isoflurane were compared in two groups of spontaneously breathing patients receiving oxygen alone (n = 19), or nitrous oxide and oxygen (n = 30). Anaesthesia was maintained successfully in all patients. The authors believe this to be a safe and econo...
متن کاملPredicted and measured oxygen concentrations in the circle system using low fresh gas flows with oxygen supplied by an oxygen concentrator.
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 ...
متن کاملThe Effect of Fresh Gas Flow on Paco2 in General Anesthesia
SUMMARY The effect of fresh gas tlow on PaCo2, was studied on 15 children who given general anesthesia for surgery. Each patient was his/her own control Arterial blood samples were drawn to measure PaCo2. First sample was taken 15 minutes and the second sample 30 minutes after the patient was anesthetised. Gas flow increased by 500 ml, and the 3rd sample taken after 15 minutes. The mean PaCo2...
متن کاملAlveolar gas relationships during use of the circle system with carbon dioxide absorption.
Expressions have been derived to show the dependence of alveolar oxygen and anaesthetic concentration on fresh gas flow to a circle system, the composition of fresh gas, ventilation and gas uptake. The form of these expressions is influenced by the degree of mixing of fresh and expired gases within the circle system. These expressions assume an equilibrium state within the circle system and the...
متن کاملGaseous homeostasis and the circle system. Factors influencing anaesthetic gas exchange.
A mathematical model of a subject breathing from a circle system has been used to follow the course of anaesthetic uptake during the simulated administration of 60% nitrous oxide, 2% halothane and 2% methoxyflurane, under non-rebreathing conditions and with fresh gas flows to the circle system of between 8 and 0.25 litre min-1. Compared with the non-rebreathing state, the use of a circle system...
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ژورنال
عنوان ژورنال: British Journal of Anaesthesia
سال: 1992
ISSN: 0007-0912
DOI: 10.1093/bja/68.4.452