Patient interface assembly for respiratory therapy

• US 8,931,478 B2
• Filed: 11/19/2008
• Issued: 01/13/2015
• Est. Priority Date: 11/19/2007
• Status: Expired due to Fees

• Current Assignee: Vyaire Medical Consumables LLC
• Original Assignee: CareFusion 2200 Inc (Becton, Dickinson & Co)
• Inventors: Dunsmore, Thomas J, Wise, Geoffrey C., Wilschke, Thomas C., Mingione, Louis P.
• Primary Examiner(s): Ho, Tan-Uyen (Jackie) T
• Assistant Examiner(s): Han, Mark K
• Application Number:
  US12/274,083
• Publication Number:
  US 20090126731A1
• Time in Patent Office: 2,246 Days
• Field of Search: 128/204.23, 12820014-20022, 12820312-20314, 128/204.18, 128/204.21, 128/204.24, 128/204.25, 128/205.18, 128/205.24
• US Class Current: 128/203.12
• CPC Class Codes: A61M 11/00 Sprayers or atomisers specially adapted for therapeutic purposes in general B05B; aerosol containers B65D83/14
• CPC Class Codes: A61M 11/06 of the injector type
• CPC Class Codes: A61M 16/0003 Accessories therefor, e.g. sensors, vibrators, negative pressure
• CPC Class Codes: A61M 16/0006 with means for creating vibrations in patients' airways
• CPC Class Codes: A61M 16/0012 by Venturi means
• CPC Class Codes: A61M 16/0051 with alarm devices
• CPC Class Codes: A61M 16/0057 Pumps therefor
• CPC Class Codes: A61M 16/0093 by adsorption, absorption or filtration
• CPC Class Codes: A61M 16/0096 High frequency jet ventilation
• CPC Class Codes: A61M 16/024 including calculation means, e.g. using a processor
• CPC Class Codes: A61M 16/06 Respiratory or anaesthetic masks
• CPC Class Codes: A61M 16/08 Bellows; Connecting tubes having means for taking samples G01N1/22; Water traps; Patient circuits
• CPC Class Codes: A61M 16/0816 Joints or connectors
• CPC Class Codes: A61M 16/0858 Pressure sampling ports
• CPC Class Codes: A61M 16/105 Filters A61M16/047, A61M16/22 take precedence; water traps A61M16/08
• CPC Class Codes: A61M 16/1055 bacterial
• CPC Class Codes: A61M 16/1065 in the expiratory path
• CPC Class Codes: A61M 16/12 by mixing different gases
• CPC Class Codes: A61M 16/127 by Venturi effect, i.e. entrainment mixers
• CPC Class Codes: A61M 16/14 by mixing different fluids, one of them being in a liquid phase
• CPC Class Codes: A61M 16/201 : Controlled valves
• CPC Class Codes: A61M 2016/0027 : pressure meter
• CPC Class Codes: A61M 2202/0208 : Oxygen
• CPC Class Codes: A61M 2202/0468 : non-physiological
• CPC Class Codes: A61M 2205/18 : with alarm
• CPC Class Codes: A61M 2205/332 : Force measuring means
• CPC Class Codes: A61M 2205/3331 : Pressure; Flow
• CPC Class Codes: A61M 2205/502 : User interfaces, e.g. screens or keyboards
• CPC Class Codes: A61M 2205/6054 : Magnetic identification systems
• CPC Class Codes: A61M 2205/702 : automatically during use
• CPC Class Codes: A61M 2205/75 : with filters
• CPC Class Codes: A61M 2230/005 : Parameter used as control input for the apparatus
• CPC Class Codes: A61M 2230/60 : Muscle strain, i.e. measured on the user
• CPC Class Codes: A61M 2230/63 : Motion, e.g. physical activity

Abstract

A patient interface assembly includes a housing that defines an inlet port and an outlet port. A jet pump receives pressurized gas flow from the inlet port and delivers the gas flow to the outlet port. A nebulizer is fluidly coupled to the outlet port and positioned to introduce medication into the gas flow and deliver medicated gas flow to a patient.

Claims

1. A patient interface assembly for delivering respiratory therapy to a patient, comprising:

a housing that defines an inlet port and an outlet port, the inlet port being configured to couple to a driver delivering pressurized gas flow to the inlet port;

a jet pump disposed within the housing and positioned to receive the pressurized gas flow from the inlet port and deliver the pressurized gas flow to the outlet port;

a nebulizer fluidly coupled to the outlet port to receive the pressurized gas flow therefrom, introduce medication into the pressurized gas flow and deliver medicated gas flow to the patient; and

a progressive seal positioned in the housing such that, as the jet pump slides toward the outlet port, a gradual seal forms between an exhalation port and the outlet port.

2. The patient interface assembly of claim 1, wherein the housing includes an entrainment port fluidly coupled to receive ambient air and wherein the jet pump is configured to combine the pressurized gas flow from the inlet port and ambient air from the entrainment port.

3. The patient interface assembly of claim 1, wherein the exhalation port is configured to exhaust air from the housing that is received from the patient via the outlet port.

4. The patient interface assembly of claim 3 and further comprising a filter disposed in the exhalation port.

5. The patient interface assembly of claim 1 and further comprising a unitary port fluidly coupling an interior of the housing with ambient air, the unitary port forming an entrainment port fluidly coupling ambient air to the interior of the housing upstream of the jet pump and the exhalation port fluidly coupling ambient air to the interior of the housing downstream of the jet pump.

6. The patient interface assembly of claim 1, wherein the jet pump includes a venturi assembly defining an entrainment region, a throat region and an expansion region.

7. The patient interface assembly of claim 1, wherein the jet pump is slidable within the housing in a direction relative to the inlet port and the outlet port.

8. The patient interface assembly of claim 7, and further comprising a spring positioned within the housing to bias the jet pump toward the inlet port.

9. The patient interface assembly of claim 7, and further comprising a diaphragm configured to deflect in response to pressurized gas flow delivered to the inlet port so as to force the jet pump in a direction toward the outlet port.

10. The patient interface assembly of claim 7, wherein the exhalation port is configured to exhaust air from the housing.

11. The patient interface assembly of claim 1, wherein the housing includes a nebulizer port to fluidly couple the nebulizer to the housing.

12. The patient interface assembly of claim 1, wherein the progressive seal comprises a cut out through the housing that tapers toward the outlet port.

13. A system for delivering respiratory therapy to a patient, comprising:

a driver unit configured to deliver pressurized gas flow;

a patient interface device fluidly coupled to the driver unit and including an inlet port, an outlet port and a jet pump positioned between the inlet port and the outlet port, wherein the inlet port is positioned to receive the pressurized gas flow from the driver unit and the jet pump is positioned to receive gas flow from the inlet port and deliver gas flow to the outlet port;

a nebulizer fluidly coupled to the outlet port to receive the pressurized gas flow therefrom, introduce medication into the pressurized gas flow and deliver medicated gas flow to the patient; and

a progressive seal positioned in the patient interface device such that, as the jet pump moves toward the outlet port, a gradual seal forms between an exhalation port and the outlet port.

14. The system of claim 13, wherein the patient interface device defines an entrainment port, wherein the jet pump is configured to combine pressurized gas from the inlet port and ambient air from the entrainment port to deliver combined gas flow to the outlet port and wherein the exhalation port is configured to exhaust air from the patient interface device received from the patient.

15. The system of claim 13, wherein the jet pump includes a venturi assembly defining an entrainment region, a throat region and an expansion region.

16. The system of claim 13, wherein the patient interface device includes a housing and wherein the jet pump is slidable within the housing in a direction relative to the inlet port and the outlet port.

17. The system of claim 16, wherein the housing further includes a spring adapted to bias the jet pump towards the inlet port.

18. The system of claim 16, wherein the housing includes a nebulizer port to fluidly couple the nebulizer to the housing.

19. The system of claim 13, wherein a patient pressure line is fluidly coupled to the driver unit and the patient interface device between the jet pump and outlet port.

20. The system of claim 13, wherein the progressive seal is positioned on an internal surface of the patient interface device and comprises a cut out that tapers toward the outlet port.