Abstract: A ventilation system supplies a gas mixture that is humidified and heated through a proportional valve which is a fail closed and normally closed servo control valve positioned proximate a patient. The proportional valve is operated by a controller that regulates the pressure and the mode (e.g., high frequency, normal respiration, combinations) gas is delivered to the patient through a nozzle connected to the endotracheal tube. The nozzle has an exhaust connected to it and a pressure sensor through a pressure sensing port. The exhaust is a capped corrugated tube that is heated and perforated to allow air to escape, to muffle gas and respiration noises, and to trap moisture.

Abstract: A ventilation system for use in ventilating a patient includes a source of pressurized gas, a primary delivery conduit to communicate and transmit the pressurized gas, an endotracheal tube for insertion into the patient's mouth and throat, and an adapter. The adapter includes a first side aperture and a second side aperture, coupled between the primary delivery conduit and the endotracheal tube for communication pressurized gas therebetween. A pressure detector is connected to the first side aperture to detect and generate signals reflective of the pressure of gas in the adapter. An indicator associated with the pressure detector receives the signals and visually displays an indication of the detected pressure of the gas in the adapter. The second side aperture receives and communicates pulses of pressurized gas from the source of pressurized gas to the endotracheal tube. The side apertures are connected to channels that angle toward the second part.

Abstract: A jet ventilator system for assisting a person's respiration includes a source of gas under pressure, a tracheal tube for insertion into the mouth and throat of the person, a jet nozzle disposed in the tracheal tube for directing gas pressure pulses toward the end of the tracheal tube inserted into the person's mouth, a primary delivery conduit coupled between the source of gas and the tracheal tube for delivering gas under pressure to the jet nozzle, a control unit coupled to the primary delivery conduit for selectively varying the flow rate through the jet nozzle, and an exhaust conduit coupled to the tracheal tube for carrying air exhaled by the person.

Abstract: A multiple state pinch valve selectively controls the flow rate of fluid flowing within a flexible, resilient pinch tube. The valve includes a housing, and two biased pivot arm pinchers pivotally mounted in the housing on opposite sides of the pinch tube. Two springs bias respective ones of the pivot arm pinchers toward one another to pinch the tube, and two electromagnetic force field generators are mounted in the housing to selectively attract respective pivot arms away from one another to thereby selectively release some of the pinching of the tube.