Methods, systems and devices for non-invasive ventilation including a non-sealing ventilation interface with an entrainment port and/or pressure feature
First Claim
1. A method comprising:
- providing a nasal interface that allows a patient to breathe ambient air through the nasal interface, wherein the nasal interface comprises a gas flow path, wherein the gas flow path comprises a distal end gas flow path opening and a proximal end gas flow path opening;
providing a nozzle associated with a proximal end of the nasal interface at a distance from a nose;
providing an entrainment port associated with the nasal interface substantially between the nozzle and a distal end of the nasal interface, wherein at least a portion of the entrainment port is between the nozzle and the distal end gas flow opening; and
adapting the nozzle to be in fluid communication with a gas delivery circuit and a gas source, wherein the nozzle is capable of delivering 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 of the nasal interface, and wherein a combination of gas from the gas source and air entrained through the entrainment port increases airway pressure,wherein the gas flow path comprises a first section that is a substantially lateral-to-midline section and a second section distal to the first section that is a substantially inferior-to-superior section, and a curve between the two sections, with the positive pressure area substantially generated proximal to the curve.
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Accused Products
Abstract
Systems and methods may include a gas source, a gas delivery circuit, and a nasal interface allowing breathing ambient air through the nasal interface. A gas flow path through the nasal interface may have a distal gas flow path opening. A nozzle may be associated with a proximal end of the nasal interface a distance from the distal end gas flow path opening. At least a portion of an entrainment port may be between the nozzle and the distal end gas flow opening. The nozzle may deliver gas into the nasal interface to create a negative pressure area in the gas flow path at the entrainment port. The nasal interface and the nozzle may create a positive pressure area between the entrainment port and the distal end gas flow path opening. Gas from the gas delivery source and air entrained through the entrainment port may increase airway pressure or lung pressure or provide ventilatory support.
983 Citations
31 Claims
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1. A method comprising:
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providing a nasal interface that allows a patient to breathe ambient air through the nasal interface, wherein the nasal interface comprises a gas flow path, wherein the gas flow path comprises a distal end gas flow path opening and a proximal end gas flow path opening; providing a nozzle associated with a proximal end of the nasal interface at a distance from a nose; providing an entrainment port associated with the nasal interface substantially between the nozzle and a distal end of the nasal interface, wherein at least a portion of the entrainment port is between the nozzle and the distal end gas flow opening; and adapting the nozzle to be in fluid communication with a gas delivery circuit and a gas source, wherein the nozzle is capable of delivering 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 of the nasal interface, and wherein a combination of gas from the gas source and air entrained through the entrainment port increases airway pressure, wherein the gas flow path comprises a first section that is a substantially lateral-to-midline section and a second section distal to the first section that is a substantially inferior-to-superior section, and a curve between the two sections, with the positive pressure area substantially generated proximal to the curve. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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4. A method comprising:
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providing a nasal interface that allows a patient to breathe ambient air through the nasal interface, wherein the nasal interface comprises a gas flow path, wherein the gas flow path comprises a distal end gas flow path opening and a proximal end gas flow path opening; providing a nozzle associated with a proximal end of the nasal interface at a distance from a nose; providing an entrainment port associated with the nasal interface substantially between the nozzle and a distal end of the nasal interface, wherein at least a portion of the entrainment port is between the nozzle and the distal end gas flow opening; and adapting the nozzle to be in fluid communication with a gas delivery circuit and a gas source, wherein the nozzle is capable of delivering 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 of the nasal interface, and wherein a combination of gas from the gas source and air entrained through the entrainment port increases airway pressure, wherein the nasal interface comprises a manifold that is curved with a lateral-posterior-inferior curve on each side of a midline to position the manifold where most comfortable to the patient.
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21. A method of delivering a therapeutic level of gas to a patient wherein the amount of gas increases the pressure in the oropharyngeal airway to a pressure level able to reduce obstructive sleep apnea airway obstructions, the method comprising:
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a. attaching a nasal interface to a patient wherein the interface does not impede the patient from breathing ambient air directly through the interface; b. placing a jet nozzle in the nasal interface at a proximal end of the interface lateral to the nose of the patient, and placing an entrainment port in the nasal interface between the jet nozzle and a distal end of the nasal interface; c. attaching a ventilator to a gas delivery circuit and the gas delivery circuit to the jet nozzle and delivering gas from the ventilator to the nasal interface; d. delivering the gas from the nozzle into the nasal interface with a velocity that creates a negative pressure inside the interface at the location of the entrainment port, at a distance from the interface distal end; and e. configuring the interface to create a positive pressure between the negative pressure area in the nasal interface and the interface distal end, wherein substantially all of the patient'"'"'s exhaled gas flows through the entrainment port and virtually none flows through the gas delivery circuit, and wherein the therapeutic level of gas requires (a) gas from the ventilator and (b) ambient air entrained through the aperture by the velocity in the nasal interface created by the ventilation gas delivery. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. A method of delivering a therapeutic level of gas to a patient wherein a delivered amount of gas increases pressure in an oropharyngeal airway to a pressure level able to reduce an obstructive sleep apnea airway obstruction, the method comprising:
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a. providing a nasal interface that does not impede the patient from breathing ambient air directly through the nasal interface, wherein the nasal interface comprises; i. a jet nozzle in the nasal interface at a proximal end of the nasal interface substantially lateral to a nose of the patient; and ii. an entrainment port in the nasal interface substantially between the jet nozzle and a distal end of the nasal interface; b. providing a ventilator and a gas delivery circuit, wherein the ventilator is in fluid communication with the jet nozzle via the gas delivery circuit; and c. delivering gas from the jet nozzle into the nasal interface with a velocity that creates a negative pressure area inside the nasal interface at the location of the entrainment port, at a distance from the distal end of the nasal interface, d. wherein the nasal interface is adapted to create a positive pressure area between the negative pressure area and the distal end of the nasal interface, and e. wherein substantially all exhaled gas flows through the entrainment port and virtually none of the exhaled gas flows through the gas delivery circuit. - View Dependent Claims (31)
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Specification