Abstract
In the past, the general consensus among anaesthesiologists has been that, in most ventilators used during anaesthesia, changes of fresh gas flow (FGF) fed to the ventilator from the anaesthesia machine and into the breathing circuit, do not usually alter the tidal volume (Vt) delivered to the patient, as long as the ventilator settings were unaltered [1, 2]. However, Ghani [3] found that varying the FGF from 2.5 to 101/min significantly increased the minute volume. In a preliminary study [4], we were able to confirm his observations indicating that the settings of expected tidal volume (Vt) and rate (f), as well as those of minute volume (V), do not represent the actual volumes exhaled by anaesthetized patients. To determine the validity of the premise, we, have investigated several factors that may influence the delivered Vt on several anaesthesia ventilators.
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© 1989 Springer-Verlag Berlin Heidelberg
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Aldrete, J.A., Adolph, A.J., Hanna, L.M., Farag, H.A., Ghaemmaghami, M. (1989). Fresh Gas Flow Rate and I:E Ratio Affect Tidal Volume in Anaesthesia Ventilators. In: van Ackern, K., Frankenberger, H., Konecny, E., Steinbereithner, K. (eds) Quantitative Anaesthesia. Anaesthesiologie und Intensivmedizin / Anaesthesiology and Intensive Care Medicine, vol 204. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-74213-2_9
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DOI: https://doi.org/10.1007/978-3-642-74213-2_9
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-50436-8
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