Non-invasive ventilation via an air entrainment patient interface

A system, comprising:

• a headgear means;
• a non-invasive ventilation patient interface means detachably coupled to the headgear means and comprising:
• a conduit means disposed about a longitudinal axis, the conduit means defining an entrainment opening and a nasal opening at opposing ends of the conduit means such that the longitudinal axis passes through both the entrainment opening and the nasal opening;
• a pressure sensing means proximate to the nasal opening;
• one or more orifices means proximate to the entrainment opening and configured to expel a jet of gas;
• and
• one or more surface means having a first end and a second end, the first end being proximate to the one or more orifice means and directing a flow of the jet of gas expelled from the one or more orifice means, the second end being closer to the nasal opening than the first end;
• wherein, in an operational state, the jet of gas adheres to the one or more surface means via the Coanda effect, thereby entraining ambient air into the entrainment opening to deliver the jet of gas and the ambient air through the nasal opening of the conduit means.

A method, comprising:

• providing a conduit disposed about a longitudinal axis, the conduit defining an entrainment opening and a nasal opening at opposing ends of the conduit such that the longitudinal axis passes through both the entrainment opening and the nasal opening;
• supplying a pressure sensing element proximate to the nasal opening;
• configuring one or more orifices proximate to the entrainment opening to expel a jet of gas;
• and
• providing one or more surfaces having a first end and a second end, the first end being proximate to the one or more orifices and configured to direct a flow of the jet of gas expelled from the one or more orifices, the second end being closer to the nasal opening than the first end;
• wherein the one or more orifices and the one or more surfaces are arranged to adhere, in an operational state, the jet of gas to the one or more surfaces via the Coanda effect, thereby entraining ambient air into the entrainment opening to deliver the jet of gas and the ambient air through the nasal opening of the conduit.