Medical ventilator

• US 6,543,449 B1
• Filed: 09/18/1998
• Issued: 04/08/2003
• Est. Priority Date: 09/19/1997
• Status: Expired due to Fees

• Current Assignee: RIC INVESTMENTS LLC (Respironics Incorporated)
• Original Assignee: Respironics Incorporated
• Inventors: Harrington, Steve, Rogers, David R., Mabry, Rebecca A., Woodring, Paul L., Stephenson, Robert L., Novkov, Donald J., Kimm, Gardner J.
• Primary Examiner(s): Lewis, Aaron J.
• Application Number:
  US09/156,463
• Time in Patent Office: 1,663 Days
• Field of Search: 128/204.18, 128/204.21, 128/204.23, 128/205.23
• US Class Current: 128/204.18
• CPC Class Codes: A61M 16/0051 with alarm devices
• CPC Class Codes: A61M 16/0057 Pumps therefor
• CPC Class Codes: A61M 16/0066 Blowers or centrifugal pumps
• 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 16/0465 Tracheostomy tubes; Devices for performing a tracheostomy; Accessories therefor, e.g. masks, filters
• CPC Class Codes: A61M 16/06 Respiratory or anaesthetic masks
• CPC Class Codes: A61M 16/12 by mixing different gases
• 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 2016/0039 in the inspiratory circuit
• CPC Class Codes: A61M 2016/0042 in the expiratory circuit
• CPC Class Codes: A61M 2205/505 Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches
• CPC Class Codes: A61M 2205/8206 battery-operated
• CPC Class Codes: A61M 2210/0618 Nose
• CPC Class Codes: F04D 17/164 Multi-stage fans, e.g. for vacuum cleaners
• CPC Class Codes: F04D 29/282 the leading edge of each vane being substantially parallel to the rotation axis
• CPC Class Codes: F04D 29/442 rotating diffusers

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 sad 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 non-invasive ventilation mode;

a selector for selecting either said first or said second set of parameters to direct said ventilator system to provide either invasive or non-invasive ventilatory support to a patient; and

a display for displaying said first and said second set of parameters said first and said second set of parameters nor being simultaneously displayed by said display.

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 ventilatory 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 ventilatory 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 non-invasive 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, wherein 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, wherein said selector includes an infrared touch screen.

9. The ventilator system of claim 1, including a manometer displayed by said display.

10. The ventilator system of claim 1, including a breath parameter displayed by said display, said breath parameter corresponding to a type of breath administered by said ventilator system.

11. The ventilator system of claim 1, wherein said gas flow generator comprises:

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

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

12. The ventilator system of claim 1, wherein said select comprises a graphical user interface having an activation area for activating either said invasive or noninvasive ventilatory support.

13. The ventilation system of claim 11 wherein said graphical user interface inches controls for modifying either said first or second set of operational parameters when displayed by said display.

14. The ventilator system of claim 1, wherein said gas flow generator comprises:

gas inlet for receiving said gas from an ambient environment;

a first impeller for imparting centrifugal force onto said gas;

a first stator for receiving said gas from said fist impeller and for pressurizing said gas;

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

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

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

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

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

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

15. The gas flow generator of claim 14, wherein said first, second and third impellers each include impeller vanes.

16. The gas flow generator of claim 15, 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.

17. The gas flow generator of claim 15, wherein each impeller is circular and includes six impeller vanes spaced around the circumference of the respective impeller.

18. The gas flow generator of claim 15, wherein said impeller vanes have a first surface and a second surface which are offset defining internal cavities.

19. The gas flow generator of claim 14, wherein said first and second stators include stator vanes.

20. The gas flow generator of claim 19, 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.

21. The gas flow generator of claim 19, wherein said stators are circular and each stator includes fifteen stator vanes disposed along the circumference of each respective stator.

22. 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 non-invasive ventilation for delivering noninvasive ventilation in a non-invasive 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;

a blower valve for controlling a flow of pressurized air from said blower outlet;

an oxygen supply system for intermixing oxygen with said pressurized gas;

oxygen valve for controlling a flow of oxygen to be delivered to a patient; and

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.

23. The ventilator system of claim 22, 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.

24. The ventilator system of claim 22, 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.

25. The ventilator system of claim 22 further including a plurality of alarms corresponding with said first, second and third operational parameters.

26. The ventilator system of claim 22, wherein said selector includes an infra-red touch screen.

27. The ventilator system of claim 22, including a manometer displayed by said display.

28. The ventilator system of claim 22, including a breath parameter displayed by said display, said breath parameter corresponding to a type of breath administered by said ventilator system.

29. The ventilator system of claim 22, including a blower valve for controlling a flow of pressurized air from said blower outlet.