Medical ventilator

• US 20030062045A1
• Filed: 11/15/2002
• Published: 04/03/2003
• Est. Priority Date: 09/18/1998
• Status: Abandoned Application

• Current Assignee: RIC INVESTMENTS LLC (Koninklijke Philips N.V.)
• Original Assignee: Respironics Incorporated (Koninklijke Philips N.V.)
• Inventors: Rogers, David R., Mabry, Rebecca A., Woodring, Paul L., Stephenson, Robert L., Novkov, Donald J., Harrington, Steve, Kimm, Gardner J.
• Application Number:
  US10/295,141
• Publication Number:
  US 20030062045A1
• Time in Patent Office: Days
• US Class Current: 128/204.18
• CPC Class Codes: A61M 16/0051 with alarm devices
• CPC Class Codes: A61M 16/0069 the speed thereof being controlled by respiratory parameters, e.g. by inhalation
• CPC Class Codes: A61M 16/024 including calculation means, e.g. using a processor
• CPC Class Codes: A61M 2016/0021 with a proportional output signal, e.g. from a thermistor
• CPC Class Codes: A61M 2016/0039 in the inspiratory circuit
• CPC Class Codes: A61M 2016/0042 in the expiratory circuit
• CPC Class Codes: F04D 17/164 Multi-stage fans, e.g. for vacuum cleaners
• CPC Class Codes: G16H 40/63 for local operation

Abstract

A ventilatory system which may be operated in an invasive and a non-invasive mode is provided utilizing a graphical user interface for presenting only those controlled parameters utilized for that specific mode of operation. Volume and pressure ventilatory support parameters are included for invasive ventilation and non-invasive ventilation control parameters are provided for non-invasive ventilatory assistance. The graphical user interface enables an operator to select the desired mode of operation wherein only those parameters related to that specific mode of operation are presented. Furthermore, a blower is provided for providing an air source to the ventilator enabling the ventilator to be self sufficient.

Claims

1. A ventilator system for providing ventilatory support to a patient, said ventilator system comprising:

a gas flow generator for providing a flow of gas to a patient;

a conduit for delivery of said gas flow to an airway of a patient;

at least a first valve for regulating delivery of gas from said gas flow generator to said conduit;

a controller for controlling delivery of said gas flow to a patient;

a first set of operational parameters for directing said controller to control delivery of gas to a patient in an invasive ventilation mode;

a second set of operational parameters for directing said controller to control delivery of gas to a patient in a noninvasive ventilation mode; and

a selector for selecting either said first or said second set of parameters to direct said ventilator system to provide either invasive or noninvasive ventilatory support to a patient.

2. The ventilator system of claim 1, wherein said first set of parameters include at least one parameter relating to volume ventilation selected from the group consisting of breathing rate, tidal volume, and peak flow.

3. The ventilator system of claim 1, wherein said first set of parameters include parameters relating to volume ventilation in delivering assisted ventilatory support, control ventilatory support, intermittent ventilation support and continuous positive airway pressure support.

4. The ventilator system of claim 1, wherein said first set of parameters include at least one parameter relating to pressure ventilation selected from the group consisting of breathing rate, pressure and I-time.

5. The ventilator system of claim 1, wherein said first set of parameters include parameters relating to pressure ventilation in delivering assisted ventilatory support, control ventilatory support, intermittent ventilation support and continuous positive airway pressure support.

6. The ventilator system of claim 1, wherein said second set of parameters relating to the delivery of noninvasive ventilation include at least one parameter selected from the group consisting of breathing rate, inhalation positive airway pressure and expiratory positive airway pressure.

7. The ventilator system of claim 1, including a third set of parameters relating to the delivery of invasive ventilation, said first set of parameters corresponding to volume ventilation and said third set of parameters relating to pressure ventilation.

8. The ventilator system of claim 1, including a display for displaying said first and said second set of parameters said first and said second set of parameters not being simultaneously displayed by said display.

9. The ventilator system of claim 8, wherein said selector includes an infrared touch screen.

10. The ventilator system of claim 8, including a manometer displayed by said display.

11. The ventilator system of claim 8, including a breath parameter displayed by said display, said breath parameter corresponding to a type of breath administered by said ventilator system.

12. A ventilator system for providing ventilatory support to a patient, said ventilator system comprising:

a blower having a blower outlet for providing gas to a patient;

a conduit in communication with said blower outlet for delivering said gas to a patient;

a controller for controlling delivery of said gas from said blower to a patient;

a first set of operational parameters corresponding to volume ventilation for delivering volume ventilation in an invasive ventilatory environment;

a second set of operational parameters corresponding to pressure ventilation for delivering volume ventilation in an invasive ventilatory environment;

a third set of operational parameters corresponding to noninvasive ventilation for delivering noninvasive ventilation in a noninvasive ventilatory environment;

a selector for selecting either said first, second or third operational parameters for delivering ventilatory support to the patient; and

a display for displaying either said first, second or third operational parameters once selected.

13. The ventilator system of claim 12, wherein said blower provides at least one hundred and five centimeters of H₂O of pressurized gas at said blower outlet at a flow rate of two hundred liters per minute.

14. The ventilator system of claim 12, including a blower valve for controlling a flow of pressurized air from said blower outlet.

15. The ventilator system of claim 14, including an oxygen supply system for intermixing oxygen with said pressurized gas.

16. The ventilator system of claim 15, including an oxygen valve for controlling a flow of oxygen to be delivered to a patient.

17. The ventilator system of claim 16, including a first flow sensor for measuring flow of said pressurized gas from said blower and a second flow sensor for measuring flow of oxygen in said oxygen supply system, said controller controlling said blower valve and said oxygen valve based on flow values sensed by said first and second flow sensors for controlling an oxygen mix delivered to a patient.

18. The ventilator system of claim 12, including an exhalation passageway for communicating exhaled air from a patient to an ambient environment and an exhalation valve located in said exhalation passageway for controlling pressure within said expiratory passageway.

19. The ventilator system of claim 12 further including a plurality of alarms corresponding with said first, second and third operational parameters.

20. A ventilator system for providing ventilatory support to a patient, said ventilator system comprising:

a blower comprising;

a blower outlet for providing gas to a patient;

at least two stators having stator vanes, said stator vanes being bio-compatible;

at least two impellers having impeller vanes, said impeller vanes being bio-compatible;

said blower providing air at a pressure of at least one hundred and five centimeters;

a conduit for delivery of said gas to the patient;

a controller for controlling the delivery of said gas from said blower to the patient;

a set of operational parameters corresponding to pressure ventilation for delivering pressure ventilation including assisted ventilatory support, control ventilatory support, and intermittent ventilation support;

a set of operational parameters corresponding to noninvasive ventilation for delivering noninvasive ventilation to a patient;

a graphical user interface having an activation area for activating either said pressure ventilation or noninvasive ventilation; and

a display area for displaying said operational parameters corresponding to the ventilation mode activated.

21. The ventilation system of claim 20 wherein said graphical user interface includes controls for modifying either said first or second operational parameters when displayed by said display area.

22. A graphical user interface for use in a ventilator enabling an operator to control the operation of said ventilator;

said graphical user interface comprising;

an activation area for displaying a first activation device for a first mode of ventilation and a second activation device for a second mode of ventilation;

a selector for selecting either said first or second activation device;

a display area for displaying operational parameters pertaining to said first mode of ventilation and said second mode of ventilation; and

said display area only displaying those operational parameters pertaining to the activation device selected by said selector.

23. A multi-stage centrifugal blower for use in a ventilatory system, said blower comprising:

an air inlet for receiving air from an ambient environment;

a first impeller for imparting centrifugal force onto said air;

a first stator for receiving air from said first impeller and for pressurizing said air;

a second impeller for receiving air from said first stator and for imparting centrifugal force onto said air;

a first impeller spacer for directing pressurized air from said first stator to said second impeller;

a second stator for receiving said air from said second impeller and for pressurizing said air;

a third impeller for receiving said air from said second stator and for imparting centrifugal force on to said air;

a second impeller spacer for directing air from said second stator to said third impeller; and

a blower outlet, wherein said air is pressurized to at least one hundred and five centimeters H₂O at said blower outlet.

24. The multi-stage centrifugal blower of claim 23, wherein said first, second and third impellers each include impeller vanes.

25. The multi-stage centrifugal blower of claim 24, wherein said impeller vanes have an interior side having a first curved surface of approximately sixty-three point nine millimeters when measured from a first reference point and a second curved surface of approximately forty three point nine millimeters when measured from a second reference point.

26. The multi-stage centrifugal blower of claim 24, wherein each impeller is circular and includes six impeller vanes spaced around the circumference of the respective impeller.

27. The multi-stage centrifugal blower of claim 24, wherein said impeller vanes have a first surface and a second surface which are offset defining internal cavities.

28. The multi-stage centrifugal blower of claim 23, wherein said first and second stators include stator vanes.

29. The multi-stage centrifugal blower of claim 28, wherein said stator vanes have a first interiorly curved surface of approximately forty-nine point five millimeters when measured from a first reference pint and a second interiorly curved surface of approximately twenty-seven point two millimeters when measured from a second reference point.

30. The multi-stage centrifugal blower of claim 28, wherein said stators are circular and each stator includes fifteen stator vanes disposed along the circumference of each respective stator.