Abstract: In certain embodiments, a system for providing respiratory therapy is provided. The system comprises a pressure generator for generating a pressurized flow of breathable gas; a subject interface for guiding the pressurized flow of breathable gas to a point of delivery at or near the airway of the subject, wherein the subject interface causes a pressure drop between an output of the pressure generator and the point of delivery; one or more sensors for generating output signals conveying information related to gas parameters of the pressurized flow of breathable gas; one or more processors configured to adjust one or more model parameters of a parameter-based model that models the subject interface; estimate the pressure drop between the output of the pressure generator and the point of delivery based on the adjusted model parameters; and adjust levels of the gas parameters based on the estimated pressure drop.

Abstract: Systems and methods for providing respiratory therapy overcome various effects of transport delay within tubing of a respiratory therapy device by virtue of estimating and compensating for, e.g., a pressure drop in such tubing.

Abstract: An improved patient interface assembly and pressure support system integrate a pressure sensor and a valve into the patient interface assembly and employs closed loop control between the sensor and the valve in order to limit delay between the time at which a condition indicative of abnormal breathing or flow load during normal breathing is experienced by a patient and the time at which altered pressure support is received by the patient.

Abstract: Feedback information is provided to a subject regarding reception of pressure support therapy, and/or other respiratory support therapy. The feedback information may indicate compliance to a respiratory therapy regimen. The feedback information is provided to the subject by transmitting the feedback information through a communication network to a client device associated with the subject. The feedback information may include a characterization of the therapy received by the subject with respect to a usage goal.

Abstract: Systems and methods for providing respiratory therapy overcome various effects of transport delay within tubing of a respiratory therapy device by virtue of estimating and compensating for, e.g., a pressure drop in such tubing.

Abstract: The lung compliance of a subject that is at least partially self-ventilating is determined. The quantification of lung compliance may be an estimation, a measurement, and/or an approximate measurement. The quantification of lung compliance may be enhanced over conventional techniques and/or systems for quantifying lung compliance of self-ventilating subjects in the lung compliance may be quantified relatively accurately without an effort belt or other external sensing device that directly measures diaphragmatic muscle pressure, and without requiring the subject to manually control diaphragmatic muscle pressure. Quantification of lung compliance may be a useful tool in evaluating the health of the subject, including detection of fluid retention associated with developing acute congestive heart failure.

Abstract: The lung compliance of a subject that is at least partially self-ventilating is determined. The quantification of lung compliance may be an estimation, a measurement, and/or an approximate measurement. The quantification of lung compliance may be enhanced over conventional techniques and/or systems for quantifying lung compliance of self-ventilating subjects in the lung compliance may be quantified relatively accurately without an effort belt or other external sensing device that directly measures diaphragmatic muscle pressure, and without requiring the subject to manually control diaphragmatic muscle pressure. Quantification of lung compliance may be a useful tool in evaluating the health of the subject, including detection of fluid retention associated with developing acute congestive heart failure.

Abstract: An improved patient interface assembly and pressure support system integrate a pressure sensor and a valve into the patient interface assembly and employs closed loop control between the sensor and the valve in order to limit delay between the time at which a condition indicative of abnormal breathing or flow load during normal breathing is experienced by a patient and the time at which altered pressure support is received by the patient.

Abstract: A system (10) configured to prompt a subject (12) to consciously alter one or more breathing parameters during childbirth. The system includes a pressure generator (14) that generates a pressurized flow of breathable gas for delivery to an airway of the subject during childbirth and a processor (22) that controls the pressure generator to adjust one or more gas parameters of the gas in the pressurized flow of breathable gas to provide breathing cues to the subject in accordance with a breathing regime associated with labor contractions, wherein the breathing cues prompt the subject to consciously alter one or more breathing parameters of respiration.

Abstract: Feedback information is provided to a subject regarding reception of pressure support therapy, and/or other respiratory support therapy. The feedback information may indicate compliance to a respiratory therapy regimen. The feedback information is provided to the subject by transmitting the feedback information through a communication network to a client device associated with the subject. The feedback information may include a characterization of the therapy received by the subject with respect to a usage goal.

Abstract: A method of estimating upper airway resistance or lung compliance of a patient is provided that includes inducing a central apnea in the patient, providing a known pressure stimulus comprising a flow of breathing gas having a known pressure level to the patient while the patient is experiencing the central apnea, determining a patient flow-related parameter, such as flow rate and/or flow volume, associated with the known pressure stimulus, and estimating the upper airway resistance or the lung compliance of the patient using the patient flow-related parameter using, for example and without limitation, an input-output system identification method.

Abstract: The lung compliance of a subject that is at least partially self-ventilating is determined. The quantification of lung compliance may be an estimation, a measurement, and/or an approximate measurement. The quantification of lung compliance may be enhanced over conventional techniques and/or systems for quantifying lung compliance of self-ventilating subjects in the lung compliance may be quantified relatively accurately without an effort belt or other external sensing device that directly measures diaphragmatic muscle pressure, and without requiring the subject to manually control diaphragmatic muscle pressure. Quantification of lung compliance may be a useful tool in evaluating the health of the subject, including detection of fluid retention associated with developing acute congestive heart failure.

Abstract: The lung compliance of a subject that is at least partially self-ventilating is determined. The quantification of lung compliance may be an estimation, a measurement, and/or an approximate measurement. The quantification of lung compliance may be enhanced over conventional techniques and/or systems for quantifying lung compliance of self-ventilating subjects in the lung compliance may be quantified relatively accurately without an effort belt or other external sensing device that directly measures diaphragmatic muscle pressure, and without requiring the subject to manually control diaphragmatic muscle pressure. Quantification of lung compliance may be a useful tool in evaluating the health of the subject, including detection of fluid retention associated with developing acute congestive heart failure.