Abstract
By definition, Mechanical Ventilation is an attempt to maintain or restore a normal rate of gas exchange in patients undergoing short or long term respiratory deficiency. This deficiency may be caused either by a chronic or an acute pulmonary disease, or be a consequence of anesthesia. Since its early age, let us say the beginning of this century, mechanical ventilation has been assigned to reproduce the modalities of normal spontaneous breathing, i. e., a tidal volume in the range VT: 400–800 cm3 (10–12 ml/kg) at an imposed frequency in the range f: 12–24 cpm (0.2–0.4Hz) (72, 73, 84). Delivering a controlled volume at a predetermined frequency is most often achieved by generating a constant flow during a fixed inspiratory time followed by a time limited passive exhalation (42, 98). This mode is called Controlled Mechanical Ventilation (CMV) which implicitly means that flow is controlled.
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Isabey, D., Brochard, L., Harf, A. (1995). Respiratory Mechanics and New Concepts in Mechanical Ventilation. In: Jaffrin, M.Y., Caro, C.G. (eds) Biological Flows. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9471-7_16
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