Apparatus and method for a ventilator system
First Claim
1. A system for controlling the inhalation and exhalation of a gas mixture to and from an airway of a patient comprisinga gas chamber and a gas delivery line extending from the gas chamber to the airway of the patient;
- an oscillating member supported in said gas chamber for movement in a pressure stroke in one direction for providing gas to the airway and a suction stroke in an opposite direction for exerting a suction to aid in exhalation of gas from the airway;
a piston and cylinder combination connected to said oscillating member for moving said oscillating member at a desired frequency and length of stroke, said combination including a piston chamber and piston mounted therein for reciprocal movement;
pneumatically operated means operatively connected to said combination for selectively providing air to said piston chamber for driving said piston; and
a microprocessor operatively connected to said pneumatically operated means for controlling the frequency and length of stroke of said piston.
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Accused Products
Abstract
An apparatus and method for a ventilator system which may be operated over a high range of frequencies from zero (0) to fifty (50) hertz as may be predetermined. A high frequency oscillator (14) has a pneumatically operated piston drive device (16) which may be operated at a predetermined frequency, a predetermined stroke length, and at a predetermined ratio between the time periods for the pressure stroke and the suction stroke. The piston (76) is operated from a plurality of solenoid operated valves (91). A microprocessor (92) controls the electronic operation of the valves (91) by suitable output signals.
182 Citations
42 Claims
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1. A system for controlling the inhalation and exhalation of a gas mixture to and from an airway of a patient comprising
a gas chamber and a gas delivery line extending from the gas chamber to the airway of the patient; -
an oscillating member supported in said gas chamber for movement in a pressure stroke in one direction for providing gas to the airway and a suction stroke in an opposite direction for exerting a suction to aid in exhalation of gas from the airway; a piston and cylinder combination connected to said oscillating member for moving said oscillating member at a desired frequency and length of stroke, said combination including a piston chamber and piston mounted therein for reciprocal movement; pneumatically operated means operatively connected to said combination for selectively providing air to said piston chamber for driving said piston; and a microprocessor operatively connected to said pneumatically operated means for controlling the frequency and length of stroke of said piston. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A respiratory system for controlling the delivery of gas to the airway of a patient comprising:
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a displacable gas delivery means for forcing periodically in one direction of travel a volume of gas under pressure into the airway of a patient throughout an inhalation period of a respiratory cycle for effecting flow of said gas to the airway; drive means operatively connected to said gas delivery means to displace the volume of gas to be delivered in a positive pressure stroke in one direction of travel from a first position to a second position and to effect the flow of gas from the airway throughout an exhalation period of the respiratory cycle in a return suction stroke in an opposite direction of travel from the second position to the first position; and means to vary the frequency of the respiratory cycles to a predetermined number of cycles per second; and means are provided to vary the time period of the inhalation period of the respiratory cycle relative to the time period of the exhalation period thereof; and said drive means comprises a piston and cylinder combination and said displacable gas delivery means comprises a diaphragm operatively connected to the piston for movement therewith. - View Dependent Claims (17, 18, 19, 20)
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21. Apparatus for controlling inhalation and exhalation of gas to and from the lungs of a patient comprising:
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gas delivery means for delivering gas to an airway of a patient in a pressure stroke and assisting in the removal of gas from the airway in a suction stroke, said gas delivery means including a pneumatically operated piston having a diaphragm mounted on one end thereof for reciprocation with said piston; a solenoid operated pneumatic valve operatively connected to said piston; a source of compressed air for said pneumatic valve; a regulator between said source of compressed air and said pneumatic valve; and a microprocessor for controlling and providing an output signal to said regulator for controlling the actuation of said pneumatic valve and associated piston. - View Dependent Claims (22, 23)
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24. Apparatus for controlling inhalation and exhalation of gas to and from the lungs of a patient comprising:
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gas delivery means for delivering gas to a airway of a patient in a pressure stroke and assisting in the removal of gas from the airway in a suction stroke, said gas delivery means including a pneumatically operated piston having a diaphragm mounted on one end thereof for reciprocation with said piston; a solenoid operated pneumatic valve operatively connected to said piston; a source of compressed air for said pneumatic valve; a regulator between said source of compressed air and said pneumatic valve; a microprocessor for controlling and providing an output signal to said regulator for controlling the actuation of said pneumatic valve and associated piston; and a sensor for said gas delivery means to sense the frequency of the operating cycle, the length of the stroke, and the relative time period of the pressure and suction strokes in an operating cycle, said sensor providing output signals to said microprocessor representing the sensed measurements. - View Dependent Claims (25, 26)
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27. Apparatus for controlling inhalation and exhalation of gas to and from the lungs of a patient comprising:
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gas delivery means for delivering gas to an airway of a patient in a pressure stroke and assisting in the removal of gas from the airway in a suction stroke, said gas delivery means including a pneumatically operated piston having a diaphragm mounted on one end thereof for reciprocation with said piston; a solenoid operated pneumatic valve operatively connected to said piston; a source of compressed air for said pneumatic valve; a regulator between said source of compressed air and said pneumatic valve; a microprocessor for controlling and providing an output signal to said regulator for controlling the actuation of said pneumatic valve and associated piston; a sensor for said gas delivery means to sense the frequency of the operating cycle, the length of the stroke, and the relative time period of the pressure and suction strokes in an operating cycle, said sensor providing output signals to said microprocessor representing the sensed measurements; a vacuum source operatively connected to said pneumatic valve; and a regulator between said vacuum source and said pneumatic valve; a pressure transducer for each regulator for sensing the fluid pressure thereat and sending an output signal to said microprocessor representing the positive fluid pressure and negative fluid pressure exerted against said pneumatic valve; and an operator keyboard and associated display operatively connected to said microprocessor for providing desired input information to said microprocessor and for visually displaying desired information on said display.
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28. Apparatus for controlling inhalation and exhalation of gas to and from an airway of a patient comprising:
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a gas chamber and a gas delivery line extending from the gas chamber to the airway of the patient; an oscillating member supported in said gas chamber for movement in a pressure stroke in one direction for providing gas to the airway and a suction stroke in an opposite direction for exerting a suction to aid in exhalation of gas from the airway; a piston and cylinder combination connected to said oscillating member for moving said oscillating member at a desired frequency and length of stroke, said combination including a piston chamber and piston mounted therein for reciprocal movement; pneumatically operated means operatively connected to said combination for selectively providing air to said piston chamber for driving said piston; and a microprocessor operatively connected to said pneumatically operated means for controlling the volume, frequency and waveform of the gas. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification