Abstract: An adapter for disposition in a breathing system circuit between a source of breathable gas and a patient airway circuit, the adapter having: a tube with a side wall defining a breathing passage between a tube inlet and a tube outlet; an injector conduit extending laterally through the tube side wall having: a bore; a nozzle communicating between the bore and the passage; and an external port, where the port includes: syringe connector means for releasably sealing between the bore of the injector conduit and a syringe; and multiple dose inhaler connector means for releasably connecting the bore of the injector conduit and a multiple dose inhaler.
Abstract: An improved manual resuscitation device such as a bag-valve-mask (BVM) device with flow control valve to eliminate the danger of patient distension and aspiration of stomach contents during ventilation. The BVM having the usual patient mask with a gas inlet and flexible patient face sealing edge, flexible manually squeezed bag with a one way intake and output valves in flow communication with a gas source and the mask inlet, and exhaust port for exhausting exhaled gas from the mask when the bag output valve is closed. The flow control valve is interposed between the mask and bag to automatically and variably limit the rate of gas flow from the bag to the mask between a predetermined minimum flow rate and a maximum flow rate. A similar flow control valve can be included in any manual resuscitation device such as a pocket mask or face shield to equal advantage.
Abstract: A disposable neonatal patient ventilator circuit for an automatic ventilator. All components that are exposed to contamination from the patient are packaged together in a disposable unit external to the automatic ventilator. The automatic ventilator has a receptacle with a pressurized breathable gas supply port, a breathing control circuit port, and preferably a patient monitoring port. The disposable neonatal resuscitator unit matches the ports on the automatic ventilator with a removable plug having a pressurized breathable gas supply connector mating the gas supply port of the receptacle; a breathing control circuit connector mating the control circuit port of the receptacle and a monitoring connector mating the monitoring port of the receptacle. A patient interface such as a tracheal insertion tube or mouth insertion manifold has an inlet and an outlet each in flow communication with the neonatal patient's airway.
Abstract: The invention relates to a device for and method of cardio-pulmonary resuscitation (CPR) involving cardiac compression of a patient's heart through expansion of the esophagus with an orally inserted balloon. Traditional CPR applies external pressure to the patient's sternum in an attempt to compress the heart thereby forcing blood flow through the heart. Such CPR is often ineffective or highly inefficient since the applied external force is dissipated as the force deflates the lungs and collapses the esophagus posterior the heart. The method of the invention expands the esophagus with a cyclically inflated and deflated balloon in the local area between the heart and the spine to exert a more effective local compression to the posterior of the heart. Preferably the lungs are inflated simultaneously to contain and further compress the heart during local esophageal compression.
Abstract: A ventilation training analyzer manikin, for providing a quantitative measurement of the relative proportions of breathable gas volume delivered to a patient's lungs and patient's stomach during ventilation attempts by a user, thus demonstrating that the user is or is not using proper ventilation methods and equipment operating techniques. The manikin has a pressure actuated valve that opens at 15 cm H2O gas pressure to mimic the opening of the human esophageal sphincter. The opening of the valve at high pressure shows users that delivery of excess volumes of high pressure gas results in aspiration of the stomach contents, potential lung damage and risk of death in some cases.
Abstract: The invention provides an in-line low supply pressure alarm device preferably housed together with a gas pressure regulator and a gas flow controller, thereby eliminating the need for the operator to monitor gas availability. The alarm device is designed to be inserted in-line and includes a hollow housing with a gas inlet, a gas outlet, and an elongate internal chamber. A piston is disposed within the chamber for axial sliding between an alarm-on and an alarm-off position. The piston includes a piston head sealed in sliding engagement with an actuating compartment of the chamber. The actuating compartment of the chamber is filled with pressurized gas in flow communication with the gas inlet in operation. The piston includes an axially extending valve stem with a lateral alarm port in flow communication with the gas inlet. The valve stem is in sliding engagement with axially spaced apart seals defining an alarm plenum within the chamber.
Abstract: The invention provides an in-line low supply pressure alarm device powered solely by supply flow of pressurized gas from a gas supply for providing an alarm signal when supply gas pressure is below a selected minimum pressure. The alarm device includes a manifold having an input port for communicating with the supply gas supply, an output port for conducting the gas downstream and a manifold chamber disposed therebetween. Gas powered alarms such as an audible reed alarm or a visual pneumatic alarm are connected to the manifold chamber via an alarm supply conduit, and produce an alarm signal when pressurized gas passes to the alarms. An supply gas pressure sensor, in communication with the manifold chamber, produces an actuating flow of pressurized gas by activating a pressure switch, in response to sensing of an supply gas pressure below the selected minimum pressure.
Abstract: An automatic resuscitation device for administering a breathable gas under pressure to a patient by an operator where all operating controls and alarms are powered by the pressurized gas in a manual override mode, a patient breathing deemed override mode, and an automatic mode. The device uses no power source other than the pressurized gas to drive alarms and the entire control system. The controls include pneumatic valves and pneumatic alarms as follows: a breathing circuit integrity alarm for notifying the operator that an integrity condition has been detected; a power fail alarm for notifying the operator that the source of pressurized gas has a pressure below a selected source input valve; and pressure relief alarm for notifying the operator that the patient's airway is above the selected pressure relief value.
March 16, 1998
Date of Patent:
May 2, 2000
O-Two Systems International, Inc.
Ronald A Laswick, Kevin D. J. Bowden, Helmut Zauner, Tian X. Zhao, Tarek A. F. Arafat
Abstract: An automatic resuscitation apparatus for administering a breathable gas to a patient that can be held in one hand, and containing the necessary valves and controls, and operable in automatic mode, demand mode, and manual mode, and having, a flow chamber for a breathable gas, a patient mask connector at an outlet of said flow chamber, a chamber valve within the flow chamber for permitting passage of breathable gas from the chamber to the mask connector, a exhaust for exhausting exhaled breath exteriorly of the flow chamber, a breathable gas supply to the flow chamber, a supply valve operable to provide an on-off control of the breathable gas supply, and, a timing valve responsive to flow of gas to the flow chamber, to move at predetermined intervals between on/off positions, the timing valve being connected to the supply valve, so as to procure on-off operation of the supply valve in timed relation to the timing valve.
Abstract: A breathing valve having a valve chamber connectable to a gas supply and to a breathing device, a gas flow opening for exit of exhaled gases through which atmospheric air may be inducted into the chamber, a valve member in the chamber, a one-way flow opening in the valve member through which gas may flow from the chamber for breathing, and preventing return flow in the opposite direction, a movable valve closure forming part of the valve member movable into and out of sealing engagement with the exit gas flow opening, and a pressure responsive device in the valve member responsive to obstruction of gas flow into the chamber and further responsive to inspiratory effort by a patient to cause the valve member to move away from the exit gas flow opening for permitting air flow through the exit gas flow opening into the chamber for inhalation.