The ventilation module (8) regulates the inspiratory pressure (P) according
to an inspiratory pressure order (AI). A control module (9) compares the
breathed volume at each cycle (VTI) with a minimum volume order (VTImini)
and varies the pressure order (AI) in the direction tending to maintain
the breathed volume (VTI) just over the minimum (VTImini), but keeping the
pressure order (AI) within the interval comprised between the two extreme
values (AImini, AImaxi). Utilization to combine the advantages of the
pressure mode ventilation with those of the volumetric ventilation.
