Ventilator having an oscillatory inspiratory phase and method
First Claim
1. In a ventilator for use with a source of gas under pressure for supplying such gas to the airway of a patient, an inlet adapted to be connected to the source of gas, an outlet adapted to be connected to the airway of the patient, oscillator means having an inlet and an outlet, means coupling the inlet of the oscillator means to the inlet of the ventilator, and means coupling the outlet of the oscillator to the outlet of the ventilator and pneumatic control means coupled to the inlet of the ventilator and coupled to said oscillator means causing said oscillator means to supply successive small volumes of gas through the outlet of the oscillator means and the outlet of the ventilator to the airway of the patient to cause diffusive ventilation of the lungs of the patient, said pneumatic control means operating solely under pneumatic control, said oscillator means including a body having the inlet and the outlet, a flow passage interconnecting the inlet and outlet of the body, a valve seat encircling the flow passage, a valve member mounted in the body in the flow passage and being movable between open and closed positions with respect to the valve seat to control the flow of gas through the flow passage from the inlet to the outlet of the body, diaphragm means carried by the body for moving the valve member between said open and closed positions, said valve member being disposed on one side of the diaphragm means, a servo port mounted on the body on the other side of the diaphragm means, means connecting the outlet of the body to the servo port for supplying gas to one side of the diaphragm means for moving the diaphragm means to cause movement of the valve member to one of said open and closed positions, said means connecting the outlet of the oscillator means to the servo port including adjustable metering valve means for controlling the rate of flow of gas into and out of the servo port to thereby control the rate of oscillation of the oscillation means and thereby the frequency rate the successive small volumes of gas supplied to the outlet of the ventilator.
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Accused Products
Abstract
Ventilator for use with a source of gas under pressure for supplying such gas to the airway of a patient having an inlet adapted to be connected to the source of gas, and an outlet adapted to be connected to the airway of the patient. A pneumatic oscillator is connected to the inlet for supplying pulsatile gas in the form of successive small volumes of gas to the airway of the patient during a breath of the patient to cause diffusive ventilation of the airway to the patient. An exhalation valve assembly is connected to the patient airway for permitting the patient to exhale gases introduced into the patient airway.
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Citations
35 Claims
- 1. In a ventilator for use with a source of gas under pressure for supplying such gas to the airway of a patient, an inlet adapted to be connected to the source of gas, an outlet adapted to be connected to the airway of the patient, oscillator means having an inlet and an outlet, means coupling the inlet of the oscillator means to the inlet of the ventilator, and means coupling the outlet of the oscillator to the outlet of the ventilator and pneumatic control means coupled to the inlet of the ventilator and coupled to said oscillator means causing said oscillator means to supply successive small volumes of gas through the outlet of the oscillator means and the outlet of the ventilator to the airway of the patient to cause diffusive ventilation of the lungs of the patient, said pneumatic control means operating solely under pneumatic control, said oscillator means including a body having the inlet and the outlet, a flow passage interconnecting the inlet and outlet of the body, a valve seat encircling the flow passage, a valve member mounted in the body in the flow passage and being movable between open and closed positions with respect to the valve seat to control the flow of gas through the flow passage from the inlet to the outlet of the body, diaphragm means carried by the body for moving the valve member between said open and closed positions, said valve member being disposed on one side of the diaphragm means, a servo port mounted on the body on the other side of the diaphragm means, means connecting the outlet of the body to the servo port for supplying gas to one side of the diaphragm means for moving the diaphragm means to cause movement of the valve member to one of said open and closed positions, said means connecting the outlet of the oscillator means to the servo port including adjustable metering valve means for controlling the rate of flow of gas into and out of the servo port to thereby control the rate of oscillation of the oscillation means and thereby the frequency rate the successive small volumes of gas supplied to the outlet of the ventilator.
- 13. In a ventilator for use with a source of gas under pressure for supplying gas under pressure to the airway of a patient, an inlet adapted to be connected to the source of gas under pressure, an outlet adapted to be connected to the airway of the patient, oscillator means, timing reset means, said oscillator means and said timing reset means each having a body provided with an inlet and an outlet and a flow passage establishing communication between the inlet and the outlet of the body, a valve seat encircling the flow passage, a valve member disposed in the flow passage and movable between open and closed positions with respect to the valve seat for controlling the flow of gas from the inlet to the outlet of the body, a diaphragm coupled to the valve member, a servo port for supplying gas to the diaphragm to move the valve member to one of said open or closed positions, said valve member being disposed on one side of the diaphragm and said servo port being disposed on the other side of the diaphragm, means connecting the inlet of the oscillator means to the inlet of the ventilator, combination venturi jet and exhalation valve means having a body with an inlet and an outlet and a flow passage extending therebetween, means connecting the outlet of the combination venturi jet and exhalation valve means to the outlet of the ventilator, a nebulizer having an inlet and an outlet, means coupling the outlet of the nebulizer to the body of the combination venturi jet and exhalation valve means so that the outlet of the nebulizer is in communication with the flow passage in the body, means coupling the outlet of the oscillator means to the servo port of the timing reset means and to the inlet of the combination venturi jet and exhalation valve means, the application of gas from the outlet of the oscillator means to the timing reset means causing the valve member of the timing reset means to be moved to a closed position to occlude the flow of gas from the inlet to the outlet of the timing reset means, adjustable impact metering means having an inlet and an outlet, means connecting the outlet of the oscillator means to the inlet of the adjustable impact metering means, adjustable frequency metering means having an inlet and an outlet, means connecting the inlet of the timing reset means to the outlet of the frequency metering means, means connecting the outlet of the impact metering means to the servo port of the oscillator means and to the inlet of the frequency metering means whereby when said timing reset means is in a closed position, gas is supplied to the servo port of the oscillator means to move the diaphragm and the valve member actuated thereby to a closed position to occlude the flow of gas from the inlet to the outlet of the oscillator means, the rate of movement of the valve member of the oscillator means to the closed position being determined by the rate of flow of gas through the frequency metering means, the closing of the valve of the oscillator means permitting gases behind the diaphragm of the reset means to be bled to ambient through the combination venturi jet and exhalation valve means whereby the timing reset means moves to a closed position from a normally open position permitting gas behind the diaphragm of the oscillator means to be bled out through the frequency metering means and through the inlet and the outlet of the timing reset means and means connected to the inlet of the ventilator and to be nebulizer for supplying gas to the nebulizer so that aerosoled gases can be supplied from the nebulizer to the combination venturi jet and exhalation valve means.
- 27. In a ventilator for use with a source of gas under pressure for supplying gas under pressure to the airway of a patient, an inlet adapted to be connected to the source of gas under pressure, an outlet adapted to be connected to the airway of the patient, primary oscillator means and counterpulse oscillator means, said primary and counterpulse oscillator means each having an inlet end and an outlet and a flow passage establishing communication between the inlet and the outlet, a valve seat through which the flow passage extends, a valve member movable between open and closed positions with respect to the valve seat for controlling the flow of gas from the inlet to the outlet, a diaphragm coupled to the valve member for actuating the valve member, means forming a servo port for supplying gas to one side of the diaphragm, the valve seat member being disposed on one side of the diaphragm and the means forming a servo port being disposed on the other side of the diaphragm, means for supplying gas from the inlet of the ventilator to the inlet of the primary oscillator means, means for supplying gas from the outlet of the primary oscillator means to the means forming a servo port of the counterpulse oscillator means, means including adjustable valve means for supplying gas from the inlet of the ventilator to the means forming a servo port of the primary oscillator means, timing means coupled between the outlet of the primary oscillator means and the means forming a servo port of the primary oscillator means and causing said primary oscillator means and said counterpulse oscillator means to operate out of phase with each other, and means connecting the outlets of the primary oscillator means and the counterpulse oscillator means to the outlet of the ventilator whereby pulses of gas are supplied to the patient by the primary oscillator means and the counterpulse oscillator means which are out of phase with each other.
- 29. In a ventilator for use with a source of gas under pressure for supplying gas under pressure to the airway of a patient, an inlet adapted to be connected to the source of gas under pressure, an outlet to be adapted to connected to the airway of the patient, primary oscillator means, oscillator reset means, counterpulse oscillator means, interruption interval means, inspiratory means, inspiratory reset means, transition delay means, each of said primary oscillator means, oscillator reset means, counterpulse oscillator means, interruption interval means, inspiratory means, inspiratory reset means and transition delay means including a body having an inlet and an outlet and a flow passage establishing communication between the inlet and the outlet of the body, a valve seat encircling the flow passage, a valve member movable between open and closed positions with respect to the valve seat for controlling the flow of gas from the inlet to the outlet of the body, a diaphragm coupled to the valve member, a servo port for supplying gas to the discharge to move the valve member to one of said open and closed positions, said valve member being disposed on one side of the diaphragm and said servo port being disposed on the other side of the diaphragm, means connecting the inlet of the primary oscillator means and the inspiratory means to the inlet of the ventilator, means including adjustable needle valve means for connecting the inlet of the interruption interval means to the inlet of the ventilator, combination venturi jet and exhalation valve means having an inlet an outlet with the outlet being coupled to the outlet of the ventilator, a nebulizer having an inlet and an outlet, means connecting the inlet of the nebulizer to the outlet of the ventilator, means connecting the outlet of the nebulizer to the combination venturi jet and exhalation valve means, means including an adjustable needle valve means connecting the outlet of the inspiratory means to the servo port of the transition delay means, means connecting the outlet of the inspiratory means to the servo port of the inspiratory reset means, the outlet of the inspiratory reset means being vented to ambient, means including needle valve means connecting the inlet of the inspiratory reset means to the servo port of the inspiratory means, means including adjustable needle valve means connecting the servo port of the inspiratory means to the outlet of the transition delay means, coupling means including an interruption interval pressure rise needle valve means connecting the outlet of the transition delay means to the inlet of the combination venturi jet and exhalation valve vase to provide pulses of gas to the airway of the patient, means connecting the inlet of the transition delay means to the servo port of the inspiratory reset means, means connecting the outlet of the inspiratory means to the servo port of the interruption interval means, base lines pause needle valve means connecting the outlet of the inspiratory means to the servo port of the inspiratory reset means, means connecting the outlet of the primary oscillator means to the servo port of the oscillator reset means, means including adjustment valve means connecting the outlet of the primary oscillator means to the servo port of the primary oscillator means, the outlet port of the oscillator reset means being open to ambient, means connecting the inlet of the oscillator reset means to the servo port of the primary oscillator means, and means connecting the outlet of the primary oscillator means to the combination venturi jet and exhalation valve means to provide counterpulses of gas to the airway of the patient.
- 31. In a ventilator for use with a source of gas under pressure for supplying gas under pressure to the airway of a patient, an inlet adapted to be connected to the source of gas under pressure and an outlet adapted to be coupled to the airway of the patient, combination venturi jet and exhalation valve means having an inlet and an outlet with the outlet being connected to the outlet of the ventilator, timed cycled pneumatically controlled ventilation means connected to the inlet of the ventilator adapted to be connected to the source of gas under pressure for supplying gas to the inlet of the combination venturi jet and exhalation valve means, diffusive high frequency ventilation means connected to the inlet of the ventilator adapted to be connected to the source of gas under pressure and connected to the inlet of the combination venturi jet and exhalation valve means for supplying pulses of gas under high frequency, and means for selecting alternatively time cycled and diffusive high frequency ventilation for the patient.
- 33. In a ventilator for use with a source of gas under pressure for supplying gas under pressure to the airway of a patient during the inspiratory phase, an inlet adapted to be connected to the source of gas under pressure, an outlet adapted to be connected to the airway of the patient, a normally open interruption interval cartridge having an inlet and an outlet, valve means connected to the inlet of the ventilator for supplying gas to the inlet of the interruption interval cartridge, an oscillator cartridge having an inlet and an outlet and valve means for controlling the flow of gas from the inlet to the outlet, means connecting the outlet of the interruption interval cartridge to the inlet of the oscillator cartridge, timing means for opening and closing the valve means of the oscillator cartridge, means for controlling the operation of the interruption interval cartridge, means connecting the outlet of the oscillator cartridge to the outlet of the ventilator, and enhancement circuit means including a needle valve for bypassing the interruption interval cartridge to supply a controlled amount of gas to the inlet of the oscillator cartridge whereby pulses of gas are produced and supplied to the patient by the oscillator cartridge.
Specification