Methods, systems and devices for non-invasive ventilation including a non-sealing ventilation interface with an entrainment port and/or pressure feature

  • US 9,132,250 B2
  • Filed: 09/03/2010
  • Issued: 09/15/2015
  • Est. Priority Date: 09/03/2009
  • Status: Active Grant
First Claim
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1. A system for providing ventilatory support comprising:

  • a gas source;

    a gas delivery circuit;

    a nasal interface adapted to allow a patient to breathe ambient air through the nasal interface;

    a gas flow path through the nasal interface, wherein the gas flow path comprises a distal end gas flow path opening;

    a nozzle positioned on a proximal end of the nasal interface at a distance from the distal end gas flow path opening; and

    an entrainment port associated with the nasal interface, wherein at least a portion of the entrainment port is between the nozzle and the distal end gas flow opening,wherein the nozzle is in fluid communication with the gas delivery circuit and the gas source,wherein the nozzle delivers gas into the nasal interface to create a negative pressure area in the gas flow path at the entrainment port,wherein the nasal interface and the nozzle create a positive pressure area between the entrainment port and the distal end gas flow path, andwherein a combination of gas from the gas source and air entrained through the entrainment port provide ventilatory support.

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