Ventilator and oscillator for use therewith and method
First Claim
1. In a ventilator adapted to be connected to a source of gas under pressure, a case, an inlet carried by the case and adapted to be connected to the source of gas, a pneumatic oscillator cartridge mounted in the case and having a body with an inlet and an outlet and a flow passage interconnecting the inlet and the outlet, diaphragm operated valve means mounted within the body and movable between open and closed positions for interrupting the flow of gas from the inlet to the outlet, a servo port in communication with the diaphragm operated valve means, means for supplying gas from the outlet to the servo port to operate the valve means, adjustable valve means for metering the flow of gas from the outlet to the servo port to provide cyclic operation of the oscillator cartridge, a patient adapter having an inlet, means supplying a continuous flow of gas to the inlet of the patient adapter, exhalation means connected to the inlet of the patient adapter for permitting gas to escape to ambient, pneumatic clutching means having an inlet and an outlet, means connecting the outlet of the oscillator cartridge to the inlet of the pneumatic clutching means, an oscillator canister having an inlet and an outlet, means coupling the outlet of the pneumatic clutching means to the inlet of the oscillator canister, means coupling the outlet of the oscillator canister to the inlet of the patient adapter, said oscillator canister having a shaft, a diaphragm mounted on the shaft and separating said canister into first and second chambers on opposite sides of the diaphragm with the first chamber being in communication with the inlet of the oscillator canister and the second chamber being in communication with the outlet of the oscillator canister, counterspring means mounted on said shaft, said oscillator canister serving to supply and withdraw small volumes of gas to and from the patient adapter, said small volumes of gas being superimposed upon the continuous flow of gas to the patient adapter whereby dynamic volumetric diffusive ventilation is supplied to the patient.
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Accused Products
Abstract
A ventilator in combination with a pneumatic oscillator cartridge comprising a body with an inlet, an outlet, a diaphragm operated valve, and a servo port. An adjustable valve is provided for metering the flow of gas from the outlet to the servo port to provide cyclic operation of the oscillator cartridge. A pneumatic clutching assembly is provided which has an inlet and an outlet. The outlet of the oscillator cartridge is connected to the inlet of the pneumatic clutching assembly. An oscillator canister is provided which has an inlet and an outlet. The outlet of the pneumatic clutching means is coupled to the inlet of the oscillator canister. The oscillator canister has a shaft, a diaphragm mounted on the shaft and separating the canister into first and second chambers. Countersprings are mounted on the shaft. The oscillator canister serves to supply and withdraw small volumes of gas to and from the patient adaptor. The small volumes of gas are superimposed upon the continuous flow of gas to the patient adaptor whereby dynamic volumetric diffusive ventilation is supplied to the patient.
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Citations
36 Claims
- 1. In a ventilator adapted to be connected to a source of gas under pressure, a case, an inlet carried by the case and adapted to be connected to the source of gas, a pneumatic oscillator cartridge mounted in the case and having a body with an inlet and an outlet and a flow passage interconnecting the inlet and the outlet, diaphragm operated valve means mounted within the body and movable between open and closed positions for interrupting the flow of gas from the inlet to the outlet, a servo port in communication with the diaphragm operated valve means, means for supplying gas from the outlet to the servo port to operate the valve means, adjustable valve means for metering the flow of gas from the outlet to the servo port to provide cyclic operation of the oscillator cartridge, a patient adapter having an inlet, means supplying a continuous flow of gas to the inlet of the patient adapter, exhalation means connected to the inlet of the patient adapter for permitting gas to escape to ambient, pneumatic clutching means having an inlet and an outlet, means connecting the outlet of the oscillator cartridge to the inlet of the pneumatic clutching means, an oscillator canister having an inlet and an outlet, means coupling the outlet of the pneumatic clutching means to the inlet of the oscillator canister, means coupling the outlet of the oscillator canister to the inlet of the patient adapter, said oscillator canister having a shaft, a diaphragm mounted on the shaft and separating said canister into first and second chambers on opposite sides of the diaphragm with the first chamber being in communication with the inlet of the oscillator canister and the second chamber being in communication with the outlet of the oscillator canister, counterspring means mounted on said shaft, said oscillator canister serving to supply and withdraw small volumes of gas to and from the patient adapter, said small volumes of gas being superimposed upon the continuous flow of gas to the patient adapter whereby dynamic volumetric diffusive ventilation is supplied to the patient.
- 24. In a method for ventilating the airway of a patient from a source of gas under pressure comprising the steps of providing a canister having an inlet adapted to be coupled to the source of gas an outlet adapted to be coupled to the airway of the patient, providing a diaphragm in the canister having a central portion and a outer annular convoluted portion to provide a servoing chamber and a percussion chamber on opposite sides of the diaphragm, providing first and second countersprings respectively in the servoing chamber and percussion chamber on opposite sides of the central portion of the diaphragm, supplying gas from the source of gas under pressure to the servoing chamber to provide a pneumatic force to cause movement of the convoluted portion of the diaphragm in a first direction followed by the central portion of the diaphragm against the force of the second counterspring until a centered position is achieved, depressurizing the servoing chamber to cause motion of the convoluted portion of the diaphragm in a second direction followed by the central portion of the diaphragm against the force of the first counterspring until a centered position is achieved and thereby supplying a plurality of small volumes of gas with rapid changes in pressure to the airway of the patient during each inspiratory phase, and withdrawing a plurality of small volumes of gas with rapid changes in pressure from the airway of the patient during each expiratory phase whereby dynamic diffusive ventilation is supplied to the airway of the patient.
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31. A ventilator adapted to be connected to a source of gas under pressure and to a patient airway;
- means adapted to be coupled to the patient airway for supplying gas under pressure to provide a flow of gas to the patient airway during the inspiratory phase, means adapted to be coupled to the patient airway permitting gases from the airway of the patient to be discharged to ambient; and
means for supplying small volumes of gas with rapid changes in pressure to the patient'"'"'s airway and for withdrawing small volume'"'"'s of gas with rapid changes in pressure from the patient'"'"'s airway, said means for supplying and withdrawing comprising an oscillator having a housing which defines a space with an inlet and an outlet in communication with the space, the outlet being adapted to be coupled to the patient airway, a diaphragm having first and second sides mounted within the housing serving to divide the space in the housing into a first servoing chamber and second percussion chamber with the first servoing chamber being in communication with the inlet and with the second percussion chamber being in communication with the outlet said diaphragm having a central portion and an annular convoluted portion disposed outwardly from the central portion, first and second yieldable spring means disposed respectively on the first and second sides of the diaphragm and servoing to yieldably retain the diaphragm in a centered position, pneumatic means for supplying pulses of gas to the first servoing chamber to cause repeated movement of the convoluted portion of the diaphragm in one direction followed by the central portion against the force of the yieldable means in accordance with the pulses of gas the movement of said diaphragm with respect to said second percussion chamber causing the supplying of a plurality of small volumes of gas with rapid changes in pressure to the patient airway superimposed upon the flow of gas to the airway of the patient during each inspiratory phase and causing the withdrawing of small volumes of gas with rapid changes in pressure from the airway of the patient by permitting repeated movement of the convoluted portion of the diaphragm followed by the central portion in an opposite direction against the force of the yieldable means during the times when pulses of gas are not being supplied to the servoing chamber during each expiratory phase whereby diffusive ventilation is provided for the patient. - View Dependent Claims (32, 33, 34, 35, 36)
- means adapted to be coupled to the patient airway for supplying gas under pressure to provide a flow of gas to the patient airway during the inspiratory phase, means adapted to be coupled to the patient airway permitting gases from the airway of the patient to be discharged to ambient; and
Specification