Abstract: A pressure support system configured to deliver a pressurized flow of breathable gas to the airway of a subject is further configured to provide information to a user position, fit or seal between the subject and the patient interface through which the pressurized flow of breathable gas is delivered. Such information may include, for example, a location on the patient interface at which the integrity of the seal is compromised, adjustments that could be made by the subject to enhance the interface between the patient interface and the subject, different types and/or sizes of patient interfaces that could be used to enhance the fit and seal between the system and the subject, and/or other information.

Abstract: A pressure support system configured to deliver a pressurized flow of breathable gas to the airway of a subject is further configured to provide information to a user position, fit or seal between the subject and the patient interface through which the pressurized flow of breathable gas is delivered. Such information may include, for example, a location on the patient interface at which the integrity of the seal is compromised, adjustments that could be made by the subject to enhance the interface between the patient interface and the subject, different types and/or sizes of patient interfaces that could be used to enhance the fit and seal between the system and the subject, and/or other information.

Abstract: The present invention provides a respiratory interface device including a first portion having one or more opening, a second portion structured to engage a face of a user, and a filtration element disposed between the first portion and the second portion. The first portion and the filtration element define a first cavity and at least the second portion and the filter element are structured to define a facial cavity when the respiratory interface device is in use. The filtration element is structured to filter gases passing from the first cavity to the second cavity and from the second cavity to the first cavity.

Abstract: A high frequency pressure oscillation device that selective restricts the flow of breathing gas to or from a patient to produce pressure spikes in the patient's airway that facilitate clearing secretions from the patient's airway. The device includes a patient circuit that defines a closed path between a source of breathing gas and the patient's airway. A valve is disposed in the patient circuit such that in an open position the path between the source of breathing gas and the airway of the patient is substantially unobstructed. When the valve is in a closed position, the path between the source of breathing gas and the patient's airway is at least partially obstructed to create the pressure spikes. An actuating system associated with the valve alternatively places the valve in the open position and in the closed position at a predetermined oscillation rate that is independent of patient effort.

Abstract: A high frequency pressure oscillation device that selective restricts the flow of breathing gas to or from a patient to produce pressure spikes in the patient's airway that facilitate clearing secretions from the patient's airway. The device includes a patient circuit that defines a closed path between a source of breathing gas and the patient's airway. A valve is disposed in the patient circuit such that in an open position the path between the source of breathing gas and the airway of the patient is substantially unobstructed. When the valve is in a closed position, the path between the source of breathing gas and the patient's airway is at least partially obstructed to create the pressure spikes. An actuating system associated with the valve alternatively places the valve in the open position and in the closed position at a predetermined oscillation rate that is independent of patient effort.

Abstract: A high frequency pressure oscillation device that selective restricts the flow of breathing gas to or from a patient to produce pressure spikes in the patient's airway that facilitate clearing secretions from the patient's airway. The device includes a patient circuit that defines a closed path between a source of breathing gas and the patient's airway. A valve is disposed in the patient circuit such that in an open position the path between the source of breathing gas and the airway of the patient is substantially unobstructed. When the valve is in a closed position, the path between the source of breathing gas and the patient's airway is at least partially obstructed to create the pressure spikes. An actuating system associated with the valve alternatively places the valve in the open position and in the closed position at a predetermined oscillation rate that is independent of patient effort.

Abstract: A device is described which incorporates three components: a tracking error estimator, a detector, and a red light indicator to alert a pilot to the potential loss of tracking control. The tracking error estimator uses the difference between the target and the desired response of the tracking aircraft to estimate the divergence from a desired tracking path. This difference is acquired by such systems as, for example, the Global Positioning System (GPS) and radar. The tracking error and its derivatives are then converted into three different metrics. The metrics represent percentage points when the tracking error and its derivatives are in an unstable or stable portion of its phase plane. Depending upon whether these metrics and/or their combinations are above a particular threshold, the detector and indicator will alert the pilot or operator whether or not corrective action needs to be taken. The threshold is determined by a predetermined logic tree.

Abstract: A two dimensional or flat image display format for showing on an aircraft pilot's helmet mounted display the position of the aircraft relative to other aerial objects in three dimensional space is disclosed. The display format switches, under pilot control, among a variety of different, primarily three dimensional perspective, views. The disclosed views include a generally top-down first view from above the primary object showing the primary object generally at the center of said first view surrounded by the one or more other objects; a generally behind-forward perspective second view from behind the primary object showing the primary object generally at the center of said second view surrounded by the one or more other objects; and, a generally inside out third view from the primary object at the center of said third view showing those one or more other objects surrounding the primary object that are generally inside a solid angle defined by said third view.

Abstract: An electronic apparatus for stimulating or actuating an eye sensing oculometer system with simulated eye movement signals that are stable, predetermined, and repeatable. The simulated signals are electrically coupled to an oculometer signal input port in lieu of video signals normally received from an eye viewing camera. Optical images representing infra red reflections from the retina and the cornea portions of the oculometer user's eye are simulated by the apparatus; movement of these images in a computer controlled pattern is contemplated and is emulated by simple operator electable patterns in the disclosed apparatus. The presence of noise signals and eye imperfections are contemplated in the stimulating apparatus.