Classification of Mechanical Ventilation Devices
Ventilators can be classified by the variables that are controlled (e.g., pressure or volume), as well as those that start (or trigger), sustain (or limit), and end (cycle) inspiration and those that maintain the expiratory support (or baseline pressure).
Control variables. A ventilator can be classified as a pressure, volume, or flow controller (Fig. 9.1). Ventilators control more than one variable at different times.
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