Abstract: An apparatus to generate pressure support ventilation and a method to control pressure support ventilation. The apparatus comprises: at least one sensor adapted to measure at least one respiratory parameter; a flow generator adapted for coupling with a patient respiratory interface; and a controller, coupled to the at least one sensor and the flow generator. The flow generator is configured to provide a flow of breathable gas for pressure support ventilation to the patient respiratory interface. The controller is configured to control the pressure support ventilation with the flow generator. The controller is further configured with a rest mode and an exercise mode. The rest mode comprises a first value set of control parameters for the pressure support ventilation and the exercise mode comprises a second value set of control parameters for the pressure support ventilation.

Abstract: A tool for use in conjunction with a pressure support system that is structured to provide therapy to a patient to treat a condition of the patient by delivering a flow of breathing gas to the patient. The tool may be implemented on a portable electronic device or a PC and is configured to, among other things, provide customized/personalized education and feedback to the patient based, at least in part, on data that is measured by the pressure support system during the provision of therapy to the patient. The tool utilizes certain patient/therapy metrics, wherein each patient/therapy metric comprises raw data that was measured by the pressure support system and that has been processed (e.g., summarized and/or otherwise manipulated) to form the patient/therapy metric.

Abstract: A method, connector and system for obtaining an indirect measurement of a parameter in a patient with a total liquid ventilation (TLV) system. At least one parameter measurement is obtained of a liquid taken in the TLV system comprising an endotracheal tube having a distal end inserted in a patient's trachea. At least one flow measurement is obtained of a liquid taken in the TLV system. Considering a fluid model of the TLV system, the at least one parameter measurement and the least one flow measurement are processed into the indirect measurement of the parameter in the patient. The indirect measurement may be a temperature or pressure. The temperature can be a lung temperature, a blood temperature or an organ temperature. The pressure may be a tracheal pressure or an alveolar pressure.

Abstract: Disclosed are an apparatus and a method for monitoring the disconnection of a patient interface system during the ventilation, in which values which are indicative for the time curve of the respiratory gas flow are established and subjected to data evaluation, and wherein an alarm is triggered on the basis of the data evaluation if at least one value which is indicative for the time curve of the respiratory gas flow deviates from a specific limit value for a specific period of time.

Abstract: The present invention provides a method for reducing condensed humidifying agent in a humidification system by pulsing a delivery of humidifying agent into a respiratory circuit. During a non-pulsed interval, gas flowing through the respiratory circuit will evaporate the condensed humidifying agent present in the respiratory circuit. The present invention also provides a method and apparatus for delivering humidified gas to a patient, wherein the delivery avoids the problems associated with a stationary water humidifier. In the method, the delivery of humidifying agent is precisely controlled to deliver a flow of humidifying agent to a volume of gas.

Abstract: A wound treatment system includes a housing that defines an oxygen outlet. An oxygen production subsystem is included in the housing and coupled to the oxygen outlet. A control subsystem is coupled to the oxygen production subsystem and configured to receive pressure information that is indicative of a pressure in a restricted airflow enclosure that is coupled to the oxygen outlet. The control subsystem then uses the pressure information to control power provided to the oxygen production subsystem in order to control an oxygen flow that is created by the oxygen production subsystem and provided through the oxygen outlet to the restricted airflow enclosure.

Abstract: A high flow nasal therapy system (1) has a gas supply (2), a nebulizer (12), and a nasal interface (7). There are two branches (11, 10) and a valve (6) linked with the controller, the branches including a first branch (11) for delivery of aerosol and a second branch (10) for delivery of non-aerosolized gas. The controller controls delivery into the branches (11, 10), in which flow is unidirectional in the first and second branches, from the gas supply towards the nasal interface. The first branch (11) includes the nebulizer (12) and a line configured to store a bolus of aerosol during flow through the second branch (10). The valve (6) comprises a Y-junction between the gas inlet on one side and the branches on the other side.

Abstract: An apparatus for assessing patient breathing and cardiovascular condition of a patient includes a storage medium for storing data regarding the breathing and cardiovascular condition of the patient, a processor in communication with the storage medium, the processor being configured to prompt the patient with a series of queries relating to patient breathing and cardiovascular condition, a display for presenting the patient with the series of queries and a date entry device for receiving responses to the series of queries. The processor is configured to tally positive responses to the series of queries to generate a sleep disordered breathing index.

Abstract: A method for controlling a ventilator includes the steps of providing an inhalation pressure limit, determining when a pressure in a connection to a patient circuit is greater than the inhalation pressure limit, and opening the valve when the pressure is greater than the inhalation pressure limit. An associated computer readable medium for controlling the method is also described.

Abstract: The invention relates to wearable electronic devices for monitoring physical activities of a person. The invention also concerns related methods and computer program products. According to the invention, a first sensor for measuring acceleration data and a second sensor for measuring heart rate data is provided. A data processing unit is configured to operate in a first mode when data is read from said first and second sensors and in a second mode when data is not read from at least one of said first and second sensors. In the first operating mode the processing unit cumulatively computes and updates a heart rate offset value based on at least one of the following data: a predetermined pulse of the person a rest, a predetermined fitness level of the person, a current recovery pulse of the person, and/or the cumulated acceleration data during the current activity. It also computes a current activity gain value based on acceleration data and heart beat rate data.

Abstract: A ventilator system and method can deliver artificial respirations to a person receiving cardiopulmonary resuscitation. The system and method may provide intermittent breath delivery (e.g., with interruptions), so that activation of the device gives a specific predetermined number of breaths, interspersed with a set time period of no breath. This pattern may be by default, manually triggered where one activation gives a set number of breaths followed by a pause until the next activation for breath (one activation gives one breath cycle), or one activation results in continuous cycle of intermittent breaths). In some embodiments, a signaling mechanism may deliver signals to a rescuer relating to timing of chest compressions of the person. The timing of the chest compressions for the signals may be based on a time of delivery of the artificial respirations. In certain embodiments, different sized masks each include a gas flow restrictor which is unique for the size of mask.

Abstract: The present invention pertains to a device (1) for the treatment of, treatment of complications arising from, and/or preventing respiratory disorders caused by bacterial, viral, protozoal, fungal and/or microbial infections, preferably for the treatment of complications arising from cystic fibrosis (CF), including a positive airway pressure device (2) for providing a breathing gas under a positive pressure to a patient interface (20), a source of nitric oxide (3) for providing gaseous nitric oxide, a gas injector (4) for injecting nitric oxide provided by the source of nitric oxide (3) into the breathing gas provided by the positive airway pressure device (2) under pressure, a flow rate sensor (5) for sensing the flow rate of the breathing gas provided to the patient interface (20) under positive airway pressure, and a controller (6) programmed for controlling the gas injector (4) for injecting the nitric oxide into the breathing gas provided by the positive airway pressure device (2) when a flow rate detecte

Abstract: The present invention relates to an integrated sleep diagnosis and treatment device, and more particularly to an integrated apnea diagnosis and treatment device. The present invention additionally relates to methods of sleep diagnosis and treatment. The sleep disorder treatment system of the present invention can use a diagnosis device to perform various forms of analysis to determine or diagnose a subject's sleeping disorder or symptoms of a subject's sleep disorder, and using this analysis or diagnosis can with or in some embodiments without human intervention treat the subject either physically or chemically to improve the sleeping disorder or the symptoms of the sleeping disorder. The diagnostic part of the system can use many different types of sensors and methods for diagnosing the severity of the symptoms of or the sleep disorder itself. The treatment part of the system can use a device to physically or chemically treat the subject's symptoms or sleep disorder itself.

Abstract: A patient interface for delivery of a supply of pressurised air or breathable gas to an entrance of a patient's airways comprising: a cushion member that includes a retaining structure and a seal-forming structure permanently connected to the retaining structure; a frame member attachable to the retaining structure; and a positioning and stabilising structure attachable to the frame member.

Abstract: Secretions that have accumulated at or near an airway of a subject (12) as the subject (12) is being mechanically ventilated are removed by suctioning. Before, during, and/or after the removal of the secretions, steps are taken to mitigated the impact of the suctioning used for secretion removal on the subject (12). As such, the timing of suction used to remove secretions may be influenced or controlled, ventilation of the subject (12) during suction may be adjusted, ventilation of the subject (12) prior to secretion removal may be adjusted to prepare the lungs of the subject (12) for secretion removal, ventilation of the subject (12) subsequent to suction for secretion removal may be adjusted, and/or other techniques for reducing the impact of suctioning for secretion removal on the subject (12) may be implemented.

Abstract: A fan unit which in use forms part of a gases supply unit, the gases supply unit suitable for use as part of a system for providing heated humidified gases to a user, the fan unit having a casing that has an inlet aperture and an outlet passage, the outlet passage including an exit aperture, the fan unit also including a fan which is located inside the casing and which is adapted for connection to a motor to drive rotation of the fan in use, the fan drawing gases into the casing via the inlet aperture, and forcing these gases out of the casing via the outlet passage as a gases stream, the outlet passage further including at least one bypass vent hole independent of the exit aperture and arranged at an angle to the path of the gases stream through the outlet passage.

Abstract: The present invention provides a device (1) for assisting a cough comprising a hosing (3), a chamber (5) formed in the housing, a mouthpiece (7) communicating with the chamber and exposed out of the housing, and an electromagnetic valve (9) assembly for opening or closing the chamber at a pre-set frequency. The device for assisting a cough according to the present invention may produce a high cough pressure and thus form a strong cough airflow to loose and cough the lung mucus out of the airways, and may prevent the collapse of the patient's airway caused by the rapid release of the cough pressure.

Abstract: A closed automated suction device (CASD) is described. The device is designed to overcome the need for manual suction and to facilitate strict asepsis in patients who are endotracheally intubated or tracheostomied. The device includes an outer tube with an inner tube concentrically nested within to define a cavity therebetween. The inner tube comprises a passage extended therethrough for providing ventilation, and the cavity between the inner and outer tubes is configured for communication with a vacuum source to provide aspiration.

Abstract: An inhalation device, assembly or system can include a kit and a pharmaceutical composition. The device can be adapted for administering therapeutic aerosols to pediatric patients, including neonates, infants or toddlers. The device can further include a vibrating mesh aerosol generator that can be insertable into a flow channel of the inhalation device through a lateral opening, and a valved face mask. The device can be connectable to a gas source through which a gas, such as oxygen, can be received into the flow channel at a low flow rate.

Abstract: A ventilator with a safe standby mode is provided. The safe standby mode allows a user to disconnect a patient from the ventilator, without the ventilator generating alarms and while maintaining previously entered ventilation parameters. In addition, while in the safe standby mode, a patient connection status is monitored, and a ventilation mode is entered automatically if the ventilator determines that a patient is connected to the ventilator while the ventilator is in the safe standby mode.

Abstract: A humidification breathing apparatus for generating and delivering humidified air to a patient at a desired humidity proximate the patient, the apparatus comprising an air flow path and a controller for controlling operation of the humidification breathing apparatus, wherein the controller is configured to operate the humidification breathing apparatus to control humidity at a point in the flow path to achieve the desired delivered humidity proximate the patient based on the patient exhaled humidity and flow.

Abstract: Apparatuses and methods for detecting sleep apnea and classifying the events as obstructive sleep apnea (OSA) and/or central sleep apnea (CSA) are disclosed herein. The apparatuses can include respiratory treatment devices that have an auto adjusting algorithm that is able to classify a sleep apnea as CSA or OSA so that an appropriate pressure can be applied to the patient depending on the type of sleep apnea detected. The apparatuses and methods can use characteristics of at least one breath preceding the apnea event in classifying the event.

Abstract: A system for controlling the delivery of medical gases includes a digital signal processor that receives at least one ventilation parameter value change, calculates a fresh oxygen flow rate, total fresh gas flow rate into the breathing circuit, and a reference oxygen flow rate representative of a predetermined oxygen concentration delivered to a patient. A graphical display presents the calculated fresh oxygen flow rate, total fresh gas flow rate, and reference oxygen flow rate. A method of controlling the delivery of medical gases to a patient includes calculating a total fresh gas flow rate into the breathing circuit, calculating a fresh oxygen flow rate into the breathing circuit, calculating a reference oxygen flow rate representative of a predetermined oxygen concentration delivered to the patient and presenting the total fresh gas flow rate, the fresh oxygen flow rate, and reference oxygen flow rate on a graphical display.

Abstract: A method of using CPAP equipment to sense cardiogenic oscillations in a patient's airflow, and to monitor and treat the patient's cardiac condition. The apparatus diagnoses cardiac morbidity conditions, such as the existence of arrhythmias or other cardiac abnormalities, and influences and optimizes cardiac stroke volume. The apparatus further monitors pulse-transit time, changes in the heart pre-ejection period, and the duration of the cardiac cycle.

Abstract: A method for controlling operation of a CPAP apparatus. The apparatus has a blower, a patient interface, an air delivery conduit for delivering air from the blower to the patient interface, a sensor for determining the pressure in the patient interface, and a control mechanism that causes air to be delivered at a desired pressure to the patient interface and that detects transitions between inhalation and exhalation of a respiratory cycle of a patient in order to synchronize the blower output with the patient's efforts. In one form the CPAP apparatus provides pressure in accordance with a bi-level waveform with at least one characterizing parameter of the waveform being automatically adjusted in accordance with indications of sleep disordered breathing. The indications of sleep disordered breathing can be one or more of snoring, apnea, hypopnea, and flow limitation.

Abstract: A pressure support system configured to deliver a pressurized flow of breathable gas to the airway of a subject is described. The system is configured to treat obstructive sleep apnea, other sleep disordered breathing, and/or other respiratory issues with limited flow respiration therapy, and/or other therapies. Limited flow respiration therapy may be an alternative to CPAP, for example. The system is configured to limit flow rate compensation, pressure compensation, and/generator or compensation of other parameters during inspiration to values proportional to the current leak to achieve limited flow respiration therapy. In some embodiments, the system comprises one or more of a pressure generator, a subject interface, one or more sensors, a processor, a user interface, electronic storage, and/or other components.

Abstract: Described is a system including a sensor and a processing arrangement. The sensor measures data corresponding to a patient's breathing patterns. The processing arrangement analyzes the breathing patterns to determine whether the breathing patterns are indicative of a REM sleep state. In another embodiment, the processing arrangement analyzes the breathing patterns to determine whether the breathing patterns are indicative of one of the following states: (i) a wake state and (ii) a sleep state. In another embodiment, a neural network analyzes the data to determine whether the breathing patterns are indicative of one of the following states: (i) a REM sleep state, (ii) a wake state and (iii) a sleep state. In another embodiment, the processing arrangement analyzes the data to determine whether the breathing pattern is indicative of an arousal.

Abstract: The invention relates to a device for operating a breathing apparatus with a touch-sensitive graphical display and just one other mechanical operating element, wherein the basic treatment can be started by pressing down the mechanical operating element, and additional adjustments are made using the touch-sensitive graphical display.

Abstract: The invention comprises a ventilation apparatus and method for operating a ventilator of a ventilator apparatus, wherein in the method at least one duration ratio factor is set in a computing system of the ventilator apparatus; at least one minute volume, at least one functional dead space volume and at least one time constant are determined; a respiration frequency is computed, based on a previously defined lung model, depending on said determined parameters, where said computed respiration frequency is optimized on at least one minimum of a delivered parameter, which is induced to a patient using said ventilator; an inspiratory time and an expiratory time are determined based on said computed respiration frequency and said duration ratio factor; at least one tidal volume based on said previously computed respiration frequency and said determined minute volume is computed; and a delivered respiratory parameter of the ventilator is closed loop controlled.

Abstract: A device (102) provides respiratory treatment for SDB (including mild OSA) and other respiratory conditions. A flow generator warms and humidifies gas at controlled flow levels. For example, the device (102) delivers breathable gas to the upper airway at flow rates of about 10-35 Liters/minute. Levels of flow rate, temperature and/or humidification of the device may be automatically adjusted in response to the detection of SDB events. The device may also automatically deliver adjustments of any of the levels in accordance with detected phases of respiratory cycles. In some embodiments, the device automatically delivers distinct levels to either of the nares based on independent control of flow to each nare. A warm-up procedure controls temperature and humidity at a desired target during a ramp-up of flow to the set therapy level. A cool-down procedure controls temperature above the dewpoint to avoid condensation internal to the device and patient interface.

Abstract: A wearable computer includes a body temperature power generation device that generates electric power using a body temperature of a wearer, a vibration power generation device, and a control section. The control section includes a determination unit that determines whether the wearer is sleeping or not, and an operation mode selecting unit that selects an operation mode from a high power consumption mode and a low power consumption mode. The operation mode selecting unit selects the low power consumption mode at least in a period in which the determination unit determines that the wearer is sleeping. The body temperature power generation device generates electric power in at least the period in which the determination unit determines that the wearer is sleeping. The vibration power generation device generates electric power in at least a period in which the determination unit determines that the wearer is not sleeping.

Abstract: The present invention provides an energy consumption measuring method and an energy consumption measuring system. According to the energy consumption measuring method and energy consumption measuring system provided by the present invention, by processing motion data of a user to acquire a corresponding motion feature vector of the user within a time period and comparing the acquired motion feature vector with a standard motion feature vector in a database, the energy consumption within this time period is acquired.

Abstract: A bubble continuous positive airway pressure system may include an adjustable flow generator configured to control a flow rate of air to be delivered to a patient. A pressure-regulated delivery system is configured to control a pressure delivered to the patient interface. The delivery system is operatively connected to a pressure control tube. One end of the pressure control tube is submerged in a liquid. A patient interface is configured to transfer pressure from the pressure control tube to the patient's airway.

Abstract: A flow generator and humidifier construction is described, including a flow generator construction adapted to reduce noise output compared to known flow generators of comparable size. The flow generator includes a chassis forming first and second muffler volumes and a venturi-shaped connection portion, and a metal/polymer composite material blower enclosure which suppresses noise from the blower. The flow generator may be programmed to include a reminder system including a menu from which the user may request a reminder to take specific action, e.g., replace a component, call a physician, and/or enter patient data card, etc.

Abstract: A system and method for communicating biofeedback to a user through a wearable device that includes collecting physiological data of at least one physiological property of a user; processing the physiological data into at least one biosignal; monitoring the at least one biosignal for a feedback activation condition; and upon satisfying a feedback activation condition, delivering haptic feedback.

Abstract: A ventilator includes first and second pathways, a conduit and a controller. The first pathway (120) is configured to supply a first gas and the second pathway (140) is configured to supply a second gas, where the second gas is mixed with the first gas to produce mixed gas having a predetermined percentage of the second gas. The conduit (166) is configured to provide the mixed gas from the first and second pathways to an access port during an inspiratory phase, and to provide discharged gas from the access port to the first pathway during an expiratory phase. The controller (180) is configured to delay supply of the second gas from the second pathway for a delay time in order to maintain the predetermined percentage of the second gas in the mixed gas provided to the access port during a subsequent inspiratory phase.

Abstract: A wearable patch and method for automatically monitoring, screening, and/or reporting events related to one or more health conditions (e.g., sleeping or breathing disorders, physical activity, arrhythmias) of a subject.

Abstract: Systems and methods for providing respiratory therapy with varying flow rates are disclosed. A system comprises a source of breathing gas, a patient interface, and a flow control device. The flow control device is configured to automatically change a rate of the flow of breathing gas. The flow control device may vary the rate of the flow of breathing gas at a frequency slower than a frequency of breathing of the patient. A method comprises coupling a patient interface to the patient, providing the flow of breathing gas to an inlet port of the patient interface, and automatically changing a rate of the flow of breathing gas with a flow control device in communication with the flow of breathing gas. The method may also comprise varying the rate of the flow of breathing gas at a frequency slower than a frequency of breathing of the patient.

Abstract: Provided is a liquid delivering pump which can determine whether the pump is suitable for use, while in a standby state, and thus, the pump can be efficiently managed and utilized. A liquid delivering pump which delivers a drug to the inside of a living body includes a storage unit that stores a drug library, a starting state switching unit that switches a starting state of the liquid delivering pump between a liquid deliverable state and a standby state, and a display unit that displays various types of information related to the liquid delivering pump. The display unit displays specification information which specifies the drug library stored in the storage unit, while in the standby state.

Abstract: Systems and methods for classifying breathing disorders of subjects are based on the respiratory response to a change in a pressure level of a pressurized flow of breathable gas. The change presents a breathing challenge to a subject. The challenge may be limited to the inspiratory breathing phase. The inspiratory pressure level may be lower than the expiratory pressure level during challenges.

Abstract: According to one embodiment of the present invention, a method of determining respiratory parameters comprises determining a ratio of pressure changes to flow changes induced in the breathing of a patient by an airflow perturbation device at each of a plurality of perturbation frequencies to form a dataset. Resistance, compliance, and inertance parameters of a model of a respiratory system are determined by comparing a predicted frequency dependence of the model to the dataset. Embodiments of the present invention further include a system and computer program product for determining respiratory parameters in substantially the same manners described above.

Abstract: Described are systems and methods for compensating long term sensitivity drift of catalytic type electrochemical gas sensors used in systems for delivering therapeutic nitric oxide (NO) gas to a patient by compensating for drift that may be specific to the sensors atypical use in systems for delivering therapeutic nitric oxide gas to a patient. The long term sensitivity drift of catalytic type electrochemical gas sensors may be addressed using calibration schedules, which can factor in the absolute change in set dose of NO being delivered to the patient that can drive one or more baseline calibrations. The calibration schedules can be used to reduce the amount of times the sensor goes offline.

Abstract: The present disclosure pertains to an exhalation valve system (10) configured to control gas flow during exhalation of a subject (12). In some embodiments, the system comprises one or more of a pressure generator (14), a subject interface (16), one or more sensors (18), one or more processors (20), electronic storage (22), user interface (23), and/or other components. The system is configured to adjust a rebreathing level of the subject based on detected occurrences of disordered breathing events. By rebreathing exhaled air (and/or other breathable gas) a subject may minimize and/or prevent central sleep apneas. The system monitors the breathing of the subject to detect occurrences of respiratory events related to central sleep apnea. The system monitors accumulated retrograde breathing and adjusts the volume of exhaled rebreathing and/or other system settings affecting the subject's breathing. Through these adjustments, the system may prevent and/or reduce respiratory events related to central sleep apnea.

Abstract: A method and apparatus to identify the source of oxygen delivery failure to a patient. The apparatus may include a pressure sensor to detect a patient's breathing pressure and ambient pressure, an oxygen flow analyzer to measure oxygen flow to the patient, and a processor to analyze the breathing pressure values, ambient pressure value, and oxygen flow rate values. When the oxygen flow rate value is greater than a predetermined threshold value, the processor is programmed to compare the breathing pressure values to the ambient pressure value and output an apnea alarm or an oxygen delivery device displacement alarm.

Abstract: A method and apparatus for respirating a patient in which the apparatus has a circulation device for circulating a gas in one direction and a conduit system, a pressure control device for varying a pressure of the gas and the conduit system in accordance with the desired respirating pattern, a sensor for measuring a flow of the gas and a composition of the gas, at least one supply line for a component of the gas, and a discharge line connected to the conduit system. The discharge line has a first valve for discharging the gas out of the conduit system, a second valve behind the first valve and a third valve in spaced relation to a behind the second valve.

Abstract: A method of detecting dyssynchrony between a patient and a pressure support system includes receiving patient flow data relating to a flow of gas provided to the patient by the pressure support system, receiving an I/E state signal representing a respiratory phase of the patient as determined by the pressure support system, and analyzing the patient flow data and the I/E state signal and declaring a dyssynchrony for a breath based on at least one of the patient flow data and the I/E state signal. The method includes determining whether at least one of a number of predetermined criterion is satisfied based on at least one of the patient flow data and the I/E state signal, and declaring the dyssynchrony for the breath if it is determined that at least one of the number of predetermined criterion is satisfied.

Abstract: A method selects the setting of a first operating parameter of a ventilation system that includes devices for feeding breathing air to and removing from a patient (7), a display device (13) with a screen (15) and a computer (11). The method includes presetting a first target value range for a first ventilation parameter, calculating permissible first operating parameter values by the computer (11) for the first operating parameter, so that the first ventilation parameter value is within the target value range if a permissible first operating parameter value is set; calculating values of a preset cost function, which is a function of at least one operating parameter, by the computer (11); selecting a first operating parameter value by the computer (11), at which the value of the cost function has an optimum; and outputting the selected first operating parameter value on the screen (15) of the display device (13).

Abstract: An apparatus for supplying a respiratory gas includes a conveyor device for conveying the respiratory gas, a conduit for feeding the respiratory gas to a person, and a humidification device for humidifying the respiratory gas. A sensor device is configured to generate a signal indicative of the respiratory gas humidity and a control device is configured to control the humidification device with regard to the signal A method of supplying a respiratory gas to a patient, in which the respiratory gas is introduced by means of a conveyor device into the conduit leading to the patient and is humidified, includes operating the conveyor device so that a respiratory gas pressure which is above ambient pressure is provided in the conduit, and adjusting the humidity on the basis of signals indicative of the relative and/or absolute humidity of the respiratory gas generated by the sensor device.

Abstract: Systems and methods provide a self-contained, intermittent positive airway pressure system for treating sleep apnea, snoring, and other respiratory disorders. The systems and methods provide an air flow director that can be worn in or over the nose of the individual in communication with an upper airway. The systems and methods provide an airflow regulation assembly that can also be worn in its entirety by the individual in communication with the air flow director. The airflow regulation assembly includes a source of positive pressure. The airflow regulation assembly intermittently operates the source of positive pressure to increase positive air pressure in the air flow director sufficient to resist tissue collapse in the upper airway during only a portion of the respiratory cycle less than the entire respiratory cycle.

Abstract: A system is configured to generate a pressurized flow of gas comprised of a first gas having a partial pressure that varies in a predetermined manner. This may be used, for example, to simulate a previous and/or theoretical respiratory gas flow that was produced (or could have been produced) by a subject. The system is configured to deliver the pressurized flow of gas to a testing system configured to measure the partial pressure the first gas in flows of gas. This may provide an opportunity to determine the response of individual testing systems to various clinical circumstances.