Portable drag compressor powered mechanical ventilator
First Claim
1. A rotary drag compressor ventilator device for ventilating the lungs of a mammalian patient, said device comprising:
- A. a rotary drag compressor comprising;
i. a housing having a gas inflow passageway and a gas outflow passageway;
ii. a rotor mounted within said housing, said rotor having a multiplicity of blades formed circularly therearound such that, when said rotor is rotated in a first direction, said blades will compress gas within said housing and expel said compressed gas out of said outflow passageway;
iii. a motor coupled to said compressor for rotating said rotor within said compressor housing; and
B. a controller apparatus to intermittently accelerate and decelerate the rotation of said rotor in accordance with desired flow rate and pressure of inspiratory gas and in accordance with stored individualized compressor characterization information so as to deliver discrete periods of inspiratory gas flow at said flow rate and pressure through said outflow passageway.
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Accused Products
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. Stored, individualized compressor characterization information is used to control the acceleration and deacceleration of the rotating compressor.
386 Citations
54 Claims
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1. A rotary drag compressor ventilator device for ventilating the lungs of a mammalian patient, said device comprising:
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A. a rotary drag compressor comprising; i. a housing having a gas inflow passageway and a gas outflow passageway; ii. a rotor mounted within said housing, said rotor having a multiplicity of blades formed circularly therearound such that, when said rotor is rotated in a first direction, said blades will compress gas within said housing and expel said compressed gas out of said outflow passageway; iii. a motor coupled to said compressor for rotating said rotor within said compressor housing; and B. a controller apparatus to intermittently accelerate and decelerate the rotation of said rotor in accordance with desired flow rate and pressure of inspiratory gas and in accordance with stored individualized compressor characterization information so as to deliver discrete periods of inspiratory gas flow at said flow rate and pressure through said outflow passageway. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A drag compressor apparatus for creating inspiratory gas flow in a mechanical ventilator, said compressor apparatus comprising:
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a housing having a gas inflow passageway and a gas outflow passageway; a rotor rotatably mounted within said housing, said rotor being configured and constructed such that rotation of said rotor in a first direction will cause said rotor to a) draw gas in said inflow passageway, b) compress said gas and c) expel said gas out of said outflow passageway; a controller for controlling the rotation of said rotor within said housing, said controller being operative to cause said rotor to intermittently accelerate and decelerate in accordance with desired flow rate and pressure of inspiratory gas and in accordance with stored individualized compressor characterization information so as to deliver discrete periods of inspiratory gas flow at said flow rate and pressure through said outflow passageway. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A method of providing pulmonary ventilation to a mammalian patient, said method comprising the steps of:
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a) providing a rotary drag compressor device comprising; i) a housing having an inflow passageway and an outflow passageway formed therein; ii) a rotor rotatably mounted within said housing such that rotation of said rotor in a first direction will draw gas into said inflow passageway, compress said gas, and expel said gas out of said outflow passageway; iii) a controller for controlling the rotation of said rotor within said housing, said controller being operative to cause said rotor to intermittently accelerate and decelerate in accordance with desired flow rate and pressure of inspiratory gas and in accordance with stored individualized compressor characterization information so as to deliver discrete periods of inspiratory gas flow at said flow rate and pressure through said outflow passageway; b) connecting the outflow passageway of said rotary drag compressor to a conduit through which respiratory gas flow may be passed into lungs of the patient; c) accelerating said rotor to a first rotational speed for sufficient time to deliver in accordance with desired flow rate and pressure a desired inspiratory gas flow through said conduit at said flow rate and pressure and into the lungs of the patient; d) stopping said rotor or decelerating said rotor to a basal rotational speed to terminate the inspiratory gas flow through said conduit and to allow an expiratory phase of a ventilation cycle to occur. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. A rotary drag compressor ventilator device for delivering inspiratory gas flow to a mammalian patient, said device comprising:
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a) a rotary drag 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 patient during an inspiratory phase of a ventilation cycle; c) means for accelerating said compressor at the beginning of the inspiratory phase of the ventilation cycle to deliver inspiratory gas flow through said passageway to said patient; d) means for controlling said compressor during the inspiratory phase of the ventilation cycle to maintain a desired inspiratory pressure and flow rate in accordance with stored individualized compressor characterization information; and e) means for decelerating said compressor at the end of the inspiratory phase of the ventilation cycle. - View Dependent Claims (50, 51, 52, 53, 54)
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Specification