SYSTEMS AND METHODS FOR DELIVERING A RESPIRATORY GAS

Connecting piece for a respiratory ventilation apparatus for delivering a respiratory gas to a patient interface, the connecting piece being configured to fix a gas pressurization unit to an internal space of a main body of the respiratory ventilation apparatus and/or damp vibration of the gas pressurization unit, wherein the connecting piece comprises a connecting part configured to connect an outlet port of the gas pressurization unit and form a sealed connection between the connecting piece and the gas pressurization unit; and a fixing part configured to fix the connecting piece to the internal space of the main body of the respiratory ventilation apparatus and form a fastening connection between the connecting piece and the main body of the respiratory ventilation apparatus; wherein the connecting part has a tubular structure; a first end of the connecting part is fixed to the fixing part; and a second end of the connecting part is configured to be connected to the outlet port of the gas pressurization unit; and wherein the second end of the connecting part is an annular double-layer port including an inner layer and an outer layer; wherein the fixing part has a sheet structure and includes an aperture configured to allow the pressurized respiratory gas to pass.