Fig. 2

Ventilatory curves from the mechanical lung. The pressure P _v and the mechanical lung airflow Q _p measured in the mechanical lung (or Q _v in the ventilatory circuit in clinical situations) connected to a ventilator in pressure support mode are plotted. P _h is the high pressure, P _l the low pressure, Q _{p, max} the maximum airflow reached in the running cycle, η _h corresponds to the high pressure triggering sensitivity, η _l to the low pressure triggering sensitivity and τ _pr to the pressure rise duration