Ventilator for rapid response to respiratory disease conditions

• US 8,714,156 B2
• Filed: 10/12/2007
• Issued: 05/06/2014
• Est. Priority Date: 10/13/2006
• Status: Expired due to Fees

• Current Assignee: Spacelabs Healthcare, Inc. (OSI Systems Incorporated)
• Original Assignee: Spacelabs Healthcare LLC (OSI Systems Incorporated)
• Inventors: Cooke, Richard Henry, Ong, Nicholas, Hays, Roy
• Primary Examiner(s): YOUNG, RACHEL T
• Application Number:
  US11/871,341
• Publication Number:
  US 20080168990A1
• Time in Patent Office: 2,398 Days
• Field of Search: 128/204.18, 12820421-20423, 12820425-20426, 12820429-20511, 128/205.24
• US Class Current: 128/205.24
• CPC Class Codes: A61M 16/0409 with mean for closing the oesophagus
• CPC Class Codes: A61M 16/0434 Cuffs
• CPC Class Codes: A61M 16/127 by Venturi effect, i.e. entrainment mixers
• CPC Class Codes: A61M 16/20 Valves specially adapted to medical respiratory devices
• CPC Class Codes: A61M 16/204 used for inhalation control
• CPC Class Codes: A61M 16/205 used for exhalation control
• CPC Class Codes: A61M 16/207 Membrane valves with pneumatic amplification stage, i.e. having master and slave membranes
• CPC Class Codes: A61M 16/209 Relief valves
• CPC Class Codes: A61M 2016/0021 with a proportional output signal, e.g. from a thermistor
• CPC Class Codes: A61M 2016/0027 pressure meter
• CPC Class Codes: A61M 2202/0208 Oxygen
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/587 Lighting arrangements
• CPC Class Codes: A61M 2205/8206 battery-operated

Abstract

The present invention relates generally to the field of ventilators, and, more specifically, to a ventilator system that addresses respiratory distress due to the onset of an epidemic or pandemic disease state. In particular, the present invention is a ventilator system that can be manufactured quickly with minimal skill requirements and employed rapidly in response to epidemic respiratory disease conditions.

Claims

1. A controllable mechanical ventilator wherein said ventilator comprises:

a gas input connected to a gas reservoir;

an inhalation conduit connected to said gas reservoir for receiving gas and directing it to a patient interface;

a flow control valve operable to control the flow of gas from the inhalation conduit to an air entrainment area, wherein said air entrainment area is connected, via a first conduit and a second conduit, to a port for receiving atmospheric air;

the patient interface connected to said air entrainment area by a conduit; and

a gas control valve, wherein said gas control valve is configured to close by a movement of a diaphragm actuator, a third valve and diaphragm, wherein said diaphragm actuator inflates in response to air flowing along a third conduit, wherein said third valve opens in response to the inflation of said diaphragm actuator, and wherein the opening of said valve causes air to flow in a fourth conduit which causes said at least one diaphragm to inflate which inflates in response to an increased pressure state and actuate said gas control valve.

2. The controllable mechanical ventilator of claim 1 wherein a valve is located in the first conduit to prevent air from passing out of the port and into the atmosphere.

3. The controllable mechanical ventilator of claim 1 wherein the second conduit has a first end connected to said first conduit and a second end connected to said air entrainment area and wherein the second conduit has a diameter that narrows from said first end to said second end, thereby having a diameter that is larger at said first end than at said second end.

4. The controllable mechanical ventilator of claim 1 wherein the amount of atmospheric air delivered through said patient interface can be modified by blocking said port.

5. A controllable mechanical ventilator wherein said ventilator comprises:

a gas input connected to a gas reservoir;

a patient flow control valve operably connected to control gas input from said gas reservoir via an inhalation conduit;

a patient interface separated from said inhalation conduit by said flow control valve;

a gas control valve, wherein said gas control valve is configured to close by a movement of a diaphragm actuator, a third valve and diaphragm, wherein said diaphragm actuator inflates in response to air flowing along a third conduit, wherein said valve opens in response to the inflation of said diaphragm actuator, and wherein the opening of said third valve causes air to flow in a fourth conduit which causes said diaphragm to inflate in response to a pressure state in and actuate said gas control valve;

wherein said ventilator is capable of responding to varying patient needs via at least one control.

6. A controllable mechanical ventilator wherein said ventilator comprises:

a gas input connected to a gas reservoir;

a patient flow control valve operably connected to control gas input from said gas reservoir via an inhalation conduit;

a patient interface, separated from said inhalation conduit by said flow control valve; and

a gas control valve, wherein said gas control valve is configured to close by a movement of a diaphragm actuator, a third valve and diaphragm, wherein said diaphragm actuator inflates in response to air flowing along a third conduit, wherein said valve opens in response to the inflation of said diaphragm actuator, and wherein the opening of said third valve causes air to flow in a fourth conduit which causes said diaphragm to inflate in response to a pressure state and actuate said gas control valve;

wherein said ventilator further comprises means for controlling at least one of;

target airway pressure (PIP), positive end-expiratory pressure (PEEP), the level of oxygenation and respiration rate.

7. The ventilator of claim 6, wherein said ventilator further comprises a humidifying filter for trapping moisture and heat.

8. The ventilator of claim 6, wherein said ventilator comprises sterilizable material.

9. The ventilator of claim 6, wherein said patient flow control valve is adjustable to provide for a specific gas flow rate.

10. The ventilator of claim 9, wherein the gas flow rate can be set to at least one of adult, pediatric, and infant modes.

11. The ventilator of claim 6, wherein PIP is in the range of 20 cm H₂O to 35 cm H₂O.

12. The ventilator of claim 6, wherein the gas input further comprises a gas interface for connection to a pressurized gas source.

13. The ventilator of claim 6, wherein the patient interface further comprises an interface for accepting exhaled gas from a patient and for delivering gas to the patient.

14. The ventilator of claim 6, wherein the patient interface is a breathing mask assembly.

15. The ventilator of claim 6, wherein the patient interface is an endotracheal tube.

16. The ventilator of claim 6, wherein the patient interface is a laryngeal mask airway device.

17. The ventilator of claim 6, wherein the flow control valve is in structural communication with a knob, capable of being physically manipulated to control breath rate.

18. The ventilator of claim 6, further comprising an expiratory conduit and expiratory valve operably connected to the patient interface.

19. The ventilator of claim 6, further comprising a pressure detector and an alarm circuit operably connected to the pressure detector, wherein said alarm circuit generates an alarm signal based upon a change in pressure detected by said pressure detector.

20. The ventilator of claim 6 wherein said patient flow control valve is operable to control the flow of gas from the inhalation conduit to an air entrainment area, wherein said air entrainment area is connected, via a first conduit and a second conduit, to a port for receiving atmospheric air.

21. The ventilator of claim 20 further comprising a fourth valve located in the first conduit to prevent air from passing out of the port and into the atmosphere wherein an oxygenation level can be varied by modulating said fourth valve to provide a mixture of oxygen and air.

22. The ventilator of claim 6 wherein the respiration rate is varied by keeping the inspiratory time fixed and varying the expiratory time.

23. The ventilator of claim 6 wherein PEEP is a variable control ranging from 5 cm H₂O to 20 cm H₂O.

24. The ventilator of claim 6 wherein the ventilator further comprises an integrated pressure gauge, located proximate to the patient interface, for measuring and displaying the instantaneous airway pressure.