Abstract: The method and system ventilates a patient's airway during the inspiratory phase and expiratory phase from a source of pressurized gas, typically from a compressor. The system and method supplies, to the patient airway during the inspiratory phase, a plurality of pulses of small volumes of gas from the gas source, and adds, in succession, pulses of small volumes of gas to provide successively greater volumes of gas successively increasing in pulsatile form the pressure of the gas in the patient's airway. This addition of successively greater volumes of gas serves to provide diffusive ventilation to the patient during the inspiratory phase, and, permits the patient to exhale during the expiratory phase.

Abstract: The method and system ventilates a patient's airway during the inspiratory phase and expiratory phase from a source of pressurized gas, typically from a compressor. The system and method supplies, to the patient airway during the inspiratory phase, a plurality of pulses of small volumes of gas from the gas source, and adds, in succession, pulses of small volumes of gas to provide successively greater volumes of gas successively increasing in pulsatile form the pressure of the gas in the patient's airway. This addition of successively greater volumes of gas serves to provide diffusive ventilation to the patient during the inspiratory phase, and, permits the patient to exhale during the expiratory phase.

Abstract: A unitary breathing head device for administering intermittent percussive ventilation to a patient having an airway and for use with an IPV device having a source of continuous gas flow and having a source of pulsed gases comprising a combination injector and exhalation valve assembly comprising a main body having an airway port for communication with the airway of the patient and having proximal and distal extremities and a flow passage extending from the proximal extremity to the distal extremity. The main body has a depending portion forming a plenum chamber in communication with the flow passage in the main body. A nebulizer is removably secured to the depending portion of the main body and has a nebulizer chamber in communication with the plenum chamber. The depending portion of the main body and the nebulizer form a handle adapted to be gripped by the hand of the patient holding the breathing head assembly.

Abstract: Interface apparatus for use by a patient having a patient airway and for use with a mechanical ventilator having inspiratory and expiratory tubing. An intrapulmonary percussive ventilator having an output and an injection device coupled to the output of the intrapulmonary percussive ventilator and having an output. The interface apparatus comprises a mixing device having a mixing chamber therein and having an outlet adapted to be connected to the patient airway. The body has fittings in communication with the mixing chamber adapted to be connected to the inspiratory tubing and to the expiratory tubing of the mechanical ventilator. The body also has an injection port in communication with the mixing chamber adapted to be connected to the output of the injection device.

Abstract: Interface apparatus for use by a patient having a patient airway and for use with a mechanical ventilator having inspiratory and expiratory tubing. An intrapulmonary percussive ventilator having an output and an injection device coupled to the output of the intrapulmonary percussive ventilator and having an output. The interface apparatus comprises a mixing device having a mixing chamber therein and having an outlet adapted to be connected to the patient airway. The body has fittings in communication with the mixing chamber adapted to be connected to the inspiratory tubing and to the expiratory tubing of the mechanical ventilator. The body also has an injection port in communication with the mixing chamber adapted to be connected to the output of the injection device.

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.

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.

Abstract: Quick disconnect assembly comprising a female fitting having a socket formed therein and a male fitting having a bayonet adapted to fit in said socket. Seals are carried by the female and male fittings for forming an airtight seal between the bayonet and the socket. A retainer is provided for retaining said fittings in engagement with each other.

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.

Abstract: Ventilator adapted to be connected to a source of gas comprising a case and an inlet adapted to be connected to the source of gas. It also is comprised of an oscillator cartridge carried by the case having a body with an inlet and an outlet and a flow passage interconnecting the inlet and the outlet. A valve member is carried by the body and is movable between open and closed positions with respect to the outlet. A diaphragm is also carried by the body and is connected to the valve member. A servo port is carried by the body for supplying gas to one side of the diaphragm to cause movement of the diaphragm to move the valve member between open and closed positions to interrupt the flow of gas from the inlet to the outlet. An adjustable impact metering valve is provided for metering the flow of gas to the servo port. A patient adapter and a pneumatic clutching device having an output coupled to the airway of the patient adapter are provided.

Abstract: Mobile self-contained ventilator having a framework and a compressor carried by said framework. The compressor has a motor and at least one fan driven by the motor which causes air to pass over the motor for cooling the motor and for picking up heat from the motor. The compressor also has an output through which compressed air is supplied. A respirator is carried by the framework and includes at least one oscillator cartridge having an inlet connected to the outlet for receiving compressed air from the outlet. The oscillator cartridge is disposed so that air, after it has passed over the motor, passes over the cartridge to heat the cartridge to inhibit moisture condensation within the cartridge.

Abstract: Ventilator adapted to be connected to a source of gas comprising a case and an inlet adapted to be connected to the source of gas. It also is comprised of an oscillator cartridge carried by the case having a body with an inlet and an outlet and a flow passage interconnecting the inlet and the outlet. A valve member is carried by the body and is movable between open and closed positions with respect to the outlet. A diaphragm is also carried by the body and is connected to the valve member. A servo port is carried by the body for supplying gas to one side of the diaphragm to cause movement of the diaphragm to move the valve member between open and closed positions to interrupt the flow of gas from the inlet to the outlet. An adjustable impact metering valve is provided for metering the flow of gas to the servo port. A patient adapter and a pneumatic clutching device having an output coupled to the airway of the patient adapter are provided.

Abstract: Ventilator adapted to be connected to a source of gas under pressure comprising a case and an inlet adapted to be connected to the source of gas. It also is comprised of an oscillator cartridge carried by the case and having a body with an inlet and an outlet and a flow passage interconnecting the inlet and the outlet. A valve member is carried by the body and is movable between open and closed positions with respect to the outlet. A diaphragm is carried by the body and is connected to the valve member for moving the valve member between and open and closed positions to interrupt the flow of gas in the flow passage between the inlet and the outlet. A servo port is carried by the body for supplying gas to the diaphragm for causing movement of the diaphragm to thereby cause movement of the valve member to the closed position to interrupt the flow of gas in the flow passage between the inlet and the outlet.

Abstract: Liquid injector for wetting mechanically delivered intrapulmonary gases having a reservoir adapted to contain a quantity of liquid. A tube extends downwardly into the reservoir to a level below the level of the liquid in the reservoir. A one-way check valve controls the flow of liquid from the tube. Tubing including an additional one-way check valve is provided for delivering gas under pressure to the reservoir above the liquid in the reservoir to apply pressure to the liquid in the reservoir to force the liquid up through the tube. An orifice is provided which is in communication with the first named one-way check valve means. A body is provided forming a chamber surrounding the orifice. A valve is provided for adjusting the flow of liquid from the orifice. Gas under pressure is supplied to the chamber to cause the gas to come in contact with the liquid passing through the orifice means. Gas is withdrawn from the chamber after liquid has been introduced into the gas.

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 successive small volumes of gas to the airway of the patient during a breath of the patient to cause diffusive ventilation of the airway of the patient. An exhalation valve assembly is connected to the patient airway for permitting the patient to exhale gases introduced into the patient airway.

Abstract: A volume limiting ventilator having a sequencing servo for switching from an inhalation phase to an exhalation phase in its operative cycle. A bellows mounted in a container is provided for receiving gas from a source of gas under pressure. A master venturi is in communication with the interior of the bellows and the exterior of the bellows. A large air breathing tube forming a part of a breathing circuit connects the interior of the bellows to a patient adapter. A master flow cartridge controlled by the sequencing servosupplies source gas to the master venturi. A transfer valve assembly is provided for determining whether the gas flows straight through to the breathing circuit or alternatively is supplied to the container carrying the bellows to raise the bellows. The transfer valve assembly controls the transfer of gas in the container from the exterior of the bellows to the interior of the bellows.

Abstract: A ventilator which may be operated in either of two manually selected modes, including (1) a first mode in which ventilation of a patient is initiated by inhalation of the patient through a patient adapter and is terminated to allow the patient to exhale when the pressure at the patient adapter reaches a predetermined level; or (2) a second mode in which ventilation of the patient is initiated in the same manner as in the first mode, but in which apneustic hold means are activated when the pressure at the patient adapter reaches the predetermined level and maintains gas pressure and flow in the patient adapter for a short predetermined time thereafter before the patient is allowed to exhale.

Abstract: The patient breathing monitoring apparatus is used for monitoring the airway of a patient which has a respirator connected thereto and which is connected to a source of gas. The respirator is of a type which during the inhalation phase supplies inspiratory gases to the airway of the patient and during exhalation phase permits the discharge of gases from the airway of the patient. The monitoring apparatus includes first and second pressure switches each of which has an inlet connected to the airway of the patient. One of the pressure switches is adjustable to sense a decrease in pressure in the airway below a predetermined value whereas the other of the switches is adjustable to sense an increase in pressure in the airway above a predetermined value. An alarm devices is coupled to the pressure switches for giving an alarm when the one switch senses a decrease in pressure below the predetermined value and when the other of the switches senses an increase in pressure above a predetermined value.

Abstract: Combination anesthesia and intensive care unit having an anesthesia apparatus in the form of an analgesia generator and a anesthesia respirator and with a vaporizer and CO.sub.2 absorber mounted thereon. A removable chair assembly is connected to the stand and is to be used by the anesthesiologist in operating the anesthesia apparatus for intensive care. A respirator and a patient breathing monitoring apparatus are also mounted upon the stand. When used as an intensive care unit, the chair assembly can be disconnected from the stand.

Abstract: Ventilator having an inhalation phase and an exhalation phase in its operative cycle for use with a source of gas under pressure. A master sequencing cartridge having an inlet adapted to be connected to a source of gas under pressure and an outlet is provided. The cartridge has a valve member movable between open and closed positions to control the flow of gas from the inlet to the outlet. The cartridge is provided with a diaphragm capable of operating under differentials in pressure for causing movement of said valve member. A breathing circuit outlet is provided and is coupled to the outlet of the master sequencing cartridge. A pneumatic control circuit is provided for controlling the movement of the valve member of the master sequencing cartridge between open and closed positions and includes a volume/rate control valve assembly having an inlet and an outlet.