Ventilation methods and devices for treating respiratory diseases

A lung ventilator comprising:

• a blender, and
• a pressure and/or flow regulation section comprising a first pressure regulator and a second pressure regulator;
• wherein:
• the blender is configured to separately receive oxygen in a regulated oxygen flow from an oxygen source and air in a regulated air flow from an air source, and to blend the oxygen and the air to provide a blended gas;
• the pressure and/or flow regulation section is configured to receive the blended gas from the blender and to regulate the blended gas to a first pressure by the first pressure regulator and to a second pressure by the second pressure regulator, the first pressure being a peak inspiratory pressure (PIP) and the second pressure being a positive end-expiratory pressure (PEEP);
• the first pressure regulator is an adjustable first pressure regulator and the second pressure regulator is an adjustable second pressure regulator;
• the pressure and/or flow regulation section further comprises:
• a first selector connected downstream of the first pressure regulator and the second pressure regulator and configured to select and direct the blended gas at the first pressure or at the second pressure;
• and
• a second selector connected downstream of the first selector and in fluid communication therewith, the second selector being configured to receive the selected blended gas and in a transmit state to transmit the selected blended gas downstream of the ventilator and in a block state to block the selected blended gas.