Respiratory therapy apparatus delivering intermittent positive pressure breathing assistance and decreasing insufflation flowrate

Respiratory therapy apparatus (1) for supplying intermittent positive pressure breathing (IPPB) assistance to an individual, comprising:

• a peripheral casing or shell (1.1),
• a motorized turbine (2) for supplying a respiratory gas under pressure,
• an internal gas circuit (3) for conveying the respiratory gas delivered by the turbine (2),
• a flowrate sensor (5) arranged on the internal gas circuit (3),
• a nonreturn device (6) arranged in the internal gas circuit (3) downstream of the flowrate sensor (5),
• an external patient circuit (10) that can be fluidically connected to the internal gas circuit (3) to convey the respiratory gas coming from the internal gas circuit (3),
• a proximal pressure sensor (7) arranged to allow the measuring of the pressure within the external patient circuit (10), and
• operating means (4) connected to the proximal pressure sensor (7) and to the
• motorized turbine (2) and configured to command the turbine (2) as a function of at least one pressure measurement taken by the proximal pressure sensor (7) and of at least one flowrate measurement taken by the flowrate sensor (5),
• and wherein the turbine (2), the operating means (4), the internal circuit (3), the flowrate sensor (5) and the nonreturn device (6) are arranged in the peripheral casing or shell (1.1),
• characterized in that the operating means (4) are configured so that, during each inspiratory phase of the individual, they command the turbine to supply a regulated gas flowrate that decreases, over the course of a non-zero gas-insufflation duration (Di) that is sufficient to reach a fixed maximum-pressure threshold (Pmax).