Portable ventilator system

• US 8,627,819 B2
• Filed: 06/02/2006
• Issued: 01/14/2014
• Est. Priority Date: 08/04/2003
• Status: Expired due to Fees

• Current Assignee: Vyaire Medical 203 Incorporated (Cardinal Health, Inc.)
• Original Assignee: Carefusion 303 Incorporated (Becton, Dickinson & Co)
• Inventors: DeVries, Douglas F., Boyle, David, Holmes, Michael, Williams, Malcolm
• Primary Examiner(s): Dixon, Annette
• Application Number:
  US11/445,762
• Publication Number:
  US 20060213518A1
• Time in Patent Office: 2,783 Days
• Field of Search: 128/200.24, 128/204.18, 128/204.21, 128/204.23, 418/206.1, 418/206.5, 418/201.1, 418/201.3
• US Class Current: 128/204.21
• 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 16/0051 with alarm devices
• CPC Class Codes: A61M 16/0057 Pumps therefor
• CPC Class Codes: A61M 16/0063 Compressors
• 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 16/026 specially adapted for predicting, e.g. for determining an information representative of a flow limitation during a ventilation cycle by using a root square technique or a regression analysis
• CPC Class Codes: A61M 16/107 in the inspiratory path
• CPC Class Codes: A61M 16/12 by mixing different gases
• CPC Class Codes: A61M 16/202 electrically actuated
• CPC Class Codes: A61M 16/205 used for exhalation control
• CPC Class Codes: A61M 16/206 Capsule valves, e.g. mushroom, membrane valves
• 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 2016/0036 in the breathing tube and used in both inspiratory and expiratory phase
• CPC Class Codes: A61M 2016/1025 the O2 concentration
• CPC Class Codes: A61M 2202/0208 Oxygen
• CPC Class Codes: A61M 2205/16 with back-up system in case of failure
• CPC Class Codes: A61M 2205/3317 Electromagnetic, inductive or dielectric measuring means
• CPC Class Codes: A61M 2205/3365 : Rotational speed
• CPC Class Codes: A61M 2205/3368 : Temperature
• CPC Class Codes: A61M 2205/3553 : remote, e.g. between patient's home and doctor's office
• CPC Class Codes: A61M 2205/3569 : sublocal, e.g. between console and disposable
• CPC Class Codes: A61M 2205/3584 : using modem, internet or bluetooth
• CPC Class Codes: A61M 2205/42 : Reducing noise
• CPC Class Codes: A61M 2205/505 : Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches
• CPC Class Codes: A61M 2205/52 : with memories providing a history of measured variating parameters of apparatus or patient
• CPC Class Codes: A61M 2205/581 : by audible feedback
• CPC Class Codes: A61M 2205/583 : by visual feedback
• CPC Class Codes: A61M 2205/70 : with testing or calibration facilities
• CPC Class Codes: A61M 2205/8206 : battery-operated
• CPC Class Codes: A61M 2205/8237 : Charging means
• CPC Class Codes: A61M 2205/8262 : connectable to external power source, e.g. connecting to automobile battery through the cigarette lighter
• CPC Class Codes: A61M 2209/086 : Docking stations
• CPC Class Codes: A61M 2230/205 : partial oxygen pressure (P-O2)
• CPC Class Codes: A61M 2230/432 : partial CO2 pressure (P-CO2)
• CPC Class Codes: A61M 2230/435 : partial O2 pressure (P-O2)
• CPC Class Codes: F01C 21/106 : with a radial surface, e.g. cam rings
• CPC Class Codes: F04C 18/126 : with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
• CPC Class Codes: F04C 2270/12 : Vibration
• CPC Class Codes: F04C 29/0035 : Equalization of pressure pulses silencing F04C29/06
• CPC Class Codes: F04C 29/068 : the silencing means being arranged inside the pump housing
• CPC Class Codes: F04C 29/12 : Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
• CPC Class Codes: G16H 20/40 : relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture
• CPC Class Codes: G16H 40/63 : for local operation
• CPC Class Codes: H02P 6/17 : and for generating speed information

Abstract

A portable ventilator uses a Roots-type blower as a compressor to reduce both the size and power consumption of the ventilator. Various functional aspects of the ventilator are delegated to multiple subassemblies having dedicated controllers and software that interact with a ventilator processor to provide user interface functions, exhalation control and flow control servos, and monitoring of patient status. The ventilator overcomes noise problems through the use of noise reducing pressure compensating orifices on the Roots blower housing and multiple baffling chambers. The ventilator is configured with a highly portable form factor, and may be used as a stand-alone device or as a docked device having a docking cradle with enhanced interface and monitoring capabilities.

Claims

1. A portable ventilator, comprising:

a ventilator housing comprising a Roots-type blower having helical rotors, and the ventilator housing comprising a first display device and a cradle interface;

a docking cradle having a ventilator interface configured to engage the cradle interface; and

a second display device coupled to the docking cradle, wherein said Roots-type blower further comprises analog sensors arranged in a circular pattern, wherein said analog sensors provide continuous rotor position and speed feedback for closed loop control.

2. The portable ventilator of claim 1, wherein the docking cradle comprises a power supply for providing electrical power to the portable ventilator.

3. The portable ventilator of claim 2, wherein the portable ventilator further comprises:

a battery that provides the electrical power to the portable ventilator when the portable ventilator is detached from the docking cradle.

4. The portable ventilator of claim 1, wherein the cradle interface includes a removable memory card slot for a removable memory card configured to allow transfer of patient information between the portable ventilator and a personal computer.

5. The portable ventilator of claim 1, wherein the cradle interface includes a patient monitor interface configured to support a remote patient monitoring system.

6. The portable ventilator of claim 1, wherein the cradle interface includes a remote alarm interface.

7. The portable ventilator of claim 1, wherein the cradle interface includes a service diagnosis port.

8. The portable ventilator of claim 1, wherein the cradle interface includes flash memory capability to facilitate at least one of manufacturing updates, service updates and field software updates.

9. The portable ventilator of claim 1, wherein said at least one analog sensor is an analog Hall effect sensor.

10. The portable ventilator of claim 1, wherein said at least one analog sensor is an anisotropic magneto-resistive (AMR) sensor.

11. The portable ventilator of claim 1, wherein said at least one analog sensor is a plurality of analog sensors.

12. The portable ventilator of claim 1, wherein said ventilator housing comprises graduated slots in said housing.

13. The portable ventilator of claim 1, further comprising an additional patient monitoring interface.

14. The portable ventilator of claim 1, further comprising an arm connected to said docking cradle wherein said second display device is coupled to said docking cradle via said arm.

15. The portable ventilator of claim 1, wherein the analog sensors are arranged in the circular pattern perpendicular to a shaft of a rotor of a motor of the Roots-type blower and adjacent to a two-pole magnet attached to an end of the shaft.

16. The portable ventilator of claim 15, wherein the analog sensors measure a position of the rotor within the motor.

17. A portable ventilator, comprising:

a ventilator housing comprising a Roots-type blower having helical rotors, the ventilator housing comprising a cradle interface and a first display device configured to display a first user interface, wherein said housing further comprises graduated slots in said housing;

a docking cradle having a ventilator interface configured to engage the cradle interface;

an arm connected to said docking cradle; and

a second display device coupled to the docking cradle via said arm, the second display device configured to display a second user interface concurrent to the first user interface being displayed on the first display device, wherein said Roots-type blower further comprises at least one analog sensor, wherein said at least one analog sensor provides continuous rotor position and speed feedback for closed loop control.

18. The portable ventilator of claim 17, wherein the first user interface displays ventilation data generated by the portable ventilator and the second user interface displays expanded ventilation data generated by the portable ventilator, wherein the ventilation data is a subset of the expanded ventilation data.

19. The portable ventilator of claim 18, wherein the second display device is configured to display the second user interface concurrent to the first user interface being displayed on the first display device when the docking cradle is engaged with the cradle interface.

20. The portable ventilator of claim 17, wherein the first display device comprises a first display screen that is configured to display first graphics and the second display device comprises a second display screen that is configured to display second graphics, the first display graphics being different than the second display graphics.