Portable drag compressor powered mechanical ventilator

• US 20050115564A1
• Filed: 12/29/2004
• Published: 06/02/2005
• Est. Priority Date: 10/14/1994
• Status: Active Grant

• Current Assignee: Douglas F. Devries, Malcolm R. Williams, Michael B. Holmes, Michael J. Cegielski, Warner V. Graves Jr
• Original Assignee: Douglas F. Devries, Malcolm R. Williams, Michael B. Holmes, Michael J. Cegielski, Warner V. Graves Jr
• Inventors: DeVries, Douglas F., Graves, Warner V. Jr., Williams, Malcolm R., Cegielski, Michael J., Holmes, Michael B.
• Granted Patent: US 7,222,623 B2
• Time in Patent Office: Days
• US Class Current: 128/204.180
• 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 16/0069 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 16/0833 T- or Y-type connectors, e.g. Y-piece
• CPC Class Codes: A61M 16/1015 using a gas flush valve, e.g. oxygen flush valve
• CPC Class Codes: A61M 16/107 in the inspiratory path
• CPC Class Codes: A61M 16/12 by mixing different gases
• CPC Class Codes: A61M 16/125 Diluting primary gas with ambient air
• CPC Class Codes: A61M 16/20 Valves specially adapted to medical respiratory devices
• 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 16/208 Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing 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 2016/0039 in the inspiratory circuit
• CPC Class Codes: A61M 2016/0042 : in the expiratory circuit
• 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 2205/18 : with alarm
• CPC Class Codes: A61M 2205/3331 : Pressure; Flow
• CPC Class Codes: A61M 2205/3365 : Rotational speed
• CPC Class Codes: A61M 2205/3561 : local, e.g. within room or hospital
• CPC Class Codes: A61M 2205/3569 : sublocal, e.g. between console and disposable
• CPC Class Codes: A61M 2205/3592 : using telemetric means, e.g. radio or optical transmission
• CPC Class Codes: A61M 2205/42 : Reducing noise
• CPC Class Codes: A61M 2205/502 : User interfaces, e.g. screens or keyboards
• CPC Class Codes: A61M 2205/581 : by audible feedback
• CPC Class Codes: A61M 2205/587 : Lighting arrangements
• CPC Class Codes: A61M 2205/70 : with testing or calibration facilities
• CPC Class Codes: A61M 2205/8206 : battery-operated
• CPC Class Codes: A61M 2205/8212 : with means or measures taken for minimising energy consumption
• CPC Class Codes: A61M 2230/46 : Resistance or compliance of the lungs
• CPC Class Codes: G01F 1/40 : Details of construction of the flow constriction devices
• CPC Class Codes: G01F 1/42 : Orifices or nozzles

Abstract

A ventilator device and system comprising a rotating compressor, preferably a drag compressor, which, at the beginning of each inspiratory ventilation phase, is accelerated to a sufficient speed to deliver the desired inspiratory gas flow, and is subsequently stopped or decelerated to a basal flow level to permit the expiratory ventilation phase to occur. The ventilator device is small and light weight enough to be utilized in portable applications. The ventilator device is power efficient enough to operate for extended periods of time on internal or external batteries. Also provided is an oxygen blending apparatus which utilizes solenoid valves having specific orifice sizes for blending desired amounts of oxygen into the inspiratory gas flow. Also provided is an exhalation valve having an exhalation flow transducer which incorporates a radio frequency data base to provide an attendant controller with specific calibration information for the exhalation flow transducer.

Claims

1-96. -96. (canceled)

97. A ventilator for ventilating lungs of a mammal, said ventilator comprising:

a) a compressor having a gas inflow for delivering gas into said compressor and a gas outflow for delivering gas from said compressor; and

i) a motor-driven rotor mounted within said compressor, wherein when said rotor is rotated, gas within said compressor will be compressed and expelled through said outflow as lung inspiratory gas; and

b) a controller to intermittently accelerate and decelerate the rotation of said rotor to thereby deliver discrete periods of inspiratory gas flow at a desired flow rate and pressure through said outflow.

98. A ventilator for ventilating lungs of a mammal, said ventilator comprising:

a)

i) a compressor having a gas inflow passageway and a gas outflow passageway; and

ii) a rotor mounted within said compressor, wherein when said rotor is rotated in a first direction, gas drawn through said gas inflow passageway is compressed and expelled through said outflow passageway as lung inspiratory gas;

b) an oxygen blending apparatus in communication with the gas inflow passageway for blending oxygen with ambient air entering the gas inflow passageway to thereby provide oxygen-enriched air within said compressor for subsequent compression and expulsion through said gas outflow passageway; and

c) a controller apparatus to intermittently accelerate and decelerate the rotation of said rotor to thereby deliver discrete periods of inspiratory gas flow at a desired flow rate and pressure through said gas outflow passageway.

99. A compressor ventilator for ventilating lungs of a mammal, said ventilator comprising:

a) a compressor having a gas inflow passageway and a gas outflow passageway; and

b) a controller to intermittently accelerate and decelerate the compressor to thereby deliver discrete periods of inspiratory gas flow at a desired flow rate and pressure through said gas outflow passageway.

100. A compressor ventilator device for delivering inspiratory gas flow to a mammal, said device comprising:

a) a compressor having an intake port and an outflow port;

b) an inspiratory gas flow passageway for carrying gas from the outflow port of the compressor to the mammal during an inspiratory phase of a ventilation cycle;

c) a motor for accelerating said compressor at the beginning of the inspiratory phase of the ventilation cycle to deliver inspiratory gas through said inspiratory gas flow passageway; and

d) a controller for controlling said compressor during the inspiratory phase of the ventilation cycle to maintain a desired inspiratory flow rate and for decelerating said compressor at the end of the inspiratory phase of the ventilation cycle.