Methods, systems and devices for non-invasive open ventilation with gas delivery nozzles within nasal pillows
A non-invasive ventilation system may include a nasal interface. The nasal interface may include a left outer tube with a distal end adapted to impinge a left nostril, at least one left opening in the left distal end in pneumatic communication with the left nostril, and a left proximal end of the left outer tube in fluid communication with ambient air. The left proximal end of the left outer tube may curve laterally away from a midline of a face. A right outer tube may be similarly provided. One or more left jet nozzles may direct ventilation gas into the left outer tube, and one or more right jet nozzles may direct ventilation gas into the right outer tube. The jet nozzles may be in fluid communication with the pressurized gas supply.
1. A patient interface for a non-invasive ventilation system, the patient interface comprising:
a manifold having a gas delivery tube attachment and a tubular extension configured to impinge with a nostril, the manifold defining a gas flow path therein that terminates at a distal end of the manifold and a pressure sensing lumen that terminates in a pressure sensing port that opens into the gas flow path; and
tubing attachable to the gas delivery tube attachment, the tubing including:
a ventilator gas delivery channel for delivering ventilation gas from a ventilator into the gas flow path of the manifold via a gas delivery nozzle to define a gas flow direction of the gas flow path, the gas flow path being curved such that the gas delivery nozzle is angulated into a wall of the manifold, the pressure sensing port opening into the gas flow path at a position inside the manifold downstream of the gas delivery nozzle in the gas flow direction; and
a pressure sensing channel that communicates with the pressure sensing lumen to place the ventilator in communication with the pressure sensing port, the pressure sensing channel and the ventilator gas delivery channel being within the same tube of the tubing for communication with the manifold via the same gas delivery tube attachment,
wherein the patient interface further comprises an aperture through which ambient air may be entrained by the ventilation gas exiting the gas delivery nozzle, the aperture being at least partially downstream of the gas delivery nozzle.
2. The patient interface of claim 1 , wherein the tubular extension comprises a nasal pillow.
3. The patient interface of claim 1 , wherein the pressure sensing channel extends into the manifold to communicate with the pressure sensing lumen.
4. The patient interface of claim 1 , wherein the aperture is formed in the manifold.
5. The patient interface of claim 1 , wherein the position at which the pressure sensing port opens into the gas flow path is downstream of the aperture in the gas flow direction.
6. The patient interface of claim 1 , further comprising a filter for collecting moisture as air is exhaled through the manifold, the moisture thereafter being entrained by the ventilation gas exiting the gas delivery nozzle.
7. The patient interface of claim 1 , wherein the gas delivery nozzle is centered with respect to an internal geometry of the manifold.
8. The patient interface of claim 1 , wherein the manifold comprises a thermoplastic or elastomeric material of 30-90 Shore A hardness.
9. The patient interface of claim 1 , wherein the ventilator gas delivery channel has a diameter of 2 to 7 millimeters.
10. A non-invasive ventilation system comprising the patient interface of claim 1 and the ventilator.
11. The non-invasive ventilation system of claim 10 , wherein the ventilator delivers the ventilation gas according to a pressure measurement taken at the pressure sensing port via the pressure sensing lumen.
12. The non-invasive ventilation system of claim 11 , wherein the ventilator delivers the ventilation gas according to a spontaneous breathing signal detected based on the pressure measurement.
13. A patient interface for a non-invasive ventilation system, the patient interface comprising:
a manifold having left and right sides, each side having a gas delivery tube attachment and a tubular extension configured to impinge with a nostril, the manifold defining, for each side, a gas flow path therein that terminates at a distal end of the manifold and a pressure sensing lumen that terminates in a pressure sensing port that opens into the gas flow path; and
tubing attachable to the gas delivery tube attachments of the left and right sides of the manifold, the tubing including:
ventilator gas delivery channels for delivering ventilation gas from a ventilator into the respective gas flow paths of the left and right sides of the manifold via respective gas delivery nozzles to define, for each side, a gas flow direction of the gas flow path, the gas flow path being curved such that the gas delivery nozzle is angulated into a wall of the manifold, the pressure sensing port opening into the gas flow path at a position inside the manifold downstream of the gas delivery nozzle in the gas flow direction; and
pressure sensing channels that communicate with the respective pressure sensing lumens to place the ventilator in communication with the respective pressure sensing ports of the left and right sides of the manifold, the pressure sensing channel and the ventilator gas delivery channel of each side of the manifold being within the same tube of the tubing for communication with the manifold via the same gas delivery tube attachment,
wherein the patient interface further comprises, for each side of the manifold, an aperture through which ambient air may be entrained by the ventilation gas exiting the respective gas delivery nozzle, the aperture being at least partially downstream of the respective gas delivery nozzle.
14. The patient interface of claim 13 , wherein the left and right sides of the manifold are pneumatically separate.
15. The patient interface of claim 14 , wherein the left and right sides of the manifold are pneumatically separated by a septum.
16. The patient interface of claim 13 , wherein the left and right sides of the manifold are pneumatically interconnected.
17. The patient interface of claim 13 , further comprising an adjustable interconnector that allows for adjustable spacing between the left and right sides of the manifold.
18. The patient interface of claim 13 , wherein the left and right sides of the manifold are curved to conform respectively to left and right sides of a face.
19. A patient interface for a non-invasive ventilation system, the patient interface comprising:
a manifold having left and right sides, each side having a tubular extension configured to impinge with a nostril, at least one of the left and right sides further having a gas delivery tube attachment, the manifold defining, for the at least one side, a gas flow path therein that terminates at a distal end of the manifold and a pressure sensing lumen that terminates in a pressure sensing port that opens into the gas flow path; and
tubing attachable to the gas delivery tube attachment of the at least one side of the manifold, the tubing including:
one or more ventilator gas delivery channels for delivering ventilation gas from a ventilator into the respective gas flow path of the at least one side of the manifold via a respective one or more gas delivery nozzles to define, for the at least one side, a gas flow direction of the gas flow path, the gas flow path being curved such that the gas delivery nozzle is angulated into a wall of the manifold, the pressure sensing port opening into the gas flow path at a position inside the manifold downstream of the gas delivery nozzle in the gas flow direction; and
one or more pressure sensing channels each of which communicates with the respective pressure sensing lumen to place the ventilator in communication with the pressure sensing port of the at least one side of the manifold, the pressure sensing channel and the ventilator gas delivery channel of each of the at least one side of the manifold being within the same tube of the tubing for communication with the manifold via the same gas delivery tube attachment,
wherein the patient interface further comprises, for the at least one side of the manifold, an aperture through which ambient air may be entrained by the ventilation gas exiting the respective one or more gas delivery nozzles, the aperture being at least partially downstream of the respective one or more gas delivery nozzles.