A mechanical model of spontaneous ventilation.
An Emerson 3-PV ventilator was modified to function as a model for spontaneous ventilation. Respiratory rates, tidal volumes, inspiratory/expiratory time ratios, and flow rates were adjusted to produce sinusoidal inspiratory and expiratory flow patterns that mimicked physiologic ventilation.
D008954:Models, Biological; D011175:Positive-Pressure Respiration; D012121:Respiration, Artificial