Abstract: Disclosed is a system for displaying and capturing file metadata of an application data file stored on a computer; said computer including a processor and memory; said memory storing an operating system for managing operations of the computer; said memory further storing a kernel of the operating system; said computer further including a user interface and at least one installed application installed on said computer for interacting with a user which, when executed by the processor under the control of the operating system, processes said application data file.

Abstract: The present invention provides a system for displaying and capturing file metadata of an application data file stored on a computer; said computer including a processor and memory; said memory storing an operating system for the computer, a kernel of the operating system and Metadata Storage; said computer including a user interface and at least one installed application for interacting with a user which processes said application data file; said system comprising: a Metadata Filter Driver installed on said computer; at least one Metadata Application Thread, which the system injects into said application when a process for execution of said application is created; a Metadata Manager operating on said computer, whereby said Metadata Filter Driver signals said Metadata Manager when said at least one application data file is accessed, which then notifies said Thread appropriate to the at least one installed application which is accessing said application data file.

Abstract: The present invention provides a system for displaying and capturing file metadata of an application data file stored on a computer; said computer including a processor and memory; said memory storing an operating system for the computer, a kernel of the operating system and Metadata Storage; said computer including a user interface and at least one installed application for interacting with a user which processes said application data file; said system comprising: a Metadata Filter Driver installed on said computer; at least one Metadata Application Thread, which the system injects into said application when a process for execution of said application is created; a Metadata Manager operating on said computer, whereby said Metadata Filter Driver signals said Metadata Manager when said at least one application data file is accessed, which then notifies said Thread appropriate to the at least one installed application which is accessing said application data file.

Abstract: CPAP treatment apparatus (10), as one form of positive pressure ventilatory assistance, is disclosed. A turbine/blower (14), operated by a mechanically coupled electrical motor (16), receives air or breathable gas at an inlet (18) thereof, and supplies the breathable gas at a delivery pressure to a delivery tube/hose (20) having connection at the other end thereof with a nose mask (12). A microcontroller (38) has an operational “Mask-Fit” mode. An initial constant pressure level is applied by the blower (14) to the mask (12). If the functional mode is a Manual mode, then the mask-fit test pressure is the current ‘set’ pressure. If the functional mode is the Automatic Titration mode, the mask-fit test pressure is the 95th percentile pressure of the previous session, otherwise it is the base treatment pressure, e.g. 10-12 cm H2O. This constant pressure is applied for a period of time, typically 1-3 minutes.

Abstract: A ventilation device for non-invasive positive pressure ventilation (NIPPV) or continuous positive airway pressure (CPAP) treatment of a patient has a gas flow generator, a gas delivery circuit optionally including a humidifier, a controller and sensors monitoring values of operational parameters of the device. The device further includes one or more relationships stored in data storage of the controller relating combinations of parameter values as being indicative of fault conditions of the device operation, the sensors and/or the fault detection process.

Abstract: A ventilation device for non-invasive positive pressure ventilation (NIPPV) or continuous positive airway pressure (CPAP) treatment of a patient has a gas flow generator, a gas delivery circuit optionally including a humidifier, a controller and sensors monitoring values of operational parameters of the device. The device further includes one or more relationships stored in data storage of the controller relating combinations of parameter values as being indicative of fault conditions of the device operation, the sensors and/or the fault detection process.

Abstract: There is described methods, systems and software for creating, managing and using authentication credentials. The invention maintains for each user two authentication credentials—external and internal authentication credentials that share the same number of authentication factors of the same type. These are stored in a data store [1.4]. The user users the external authentication credential by a device [1.1] that is external to the network [1.8]. This is matched to the internal authentication credentials that are then used authenticate the user on the network [1.8]. It is an advantage of the invention that the internal authentication credentials are not stored on the device [1.1] leading to greater security. Also, the client software on the device [1.1] does not need to be customised in anyway to deliver this improved security.

Abstract: A method for determining a mask-fit test pressure to be applied to a wearer's mask by ventilatory assistance apparatus includes adaptively determining the mask-fit pressure from prior use.

Abstract: A flow generator having use in the provision of CPAP or assisted ventilation treatment is disclosed The flow generator has a turbine for the supply of breathable gas which is driven by an electric motor and an associated motor power supply. The power supply in turn is controlled by a controller. A pressure sensing port measures delivery pressure that is passed to a pressure transducer, the output signal of which is passed to the motor controller. The zero offset of the pressure transducer is automatically calibrated on occurrence of the conditions where the turbine is not operating and no pressure activity is sensed by the transducer. The turbine not operating condition can be determined from Hall-effect sensors integral to the motor.

Abstract: A CPAP treatment apparatus, as one form of positive pressure ventilatory assistance, includes a turbine/blower, operated by a mechanically coupled electrical motor that receives air or breathable gas at an inlet thereof, and supplies the breathable gas at a delivery pressure to a delivery tube/hose having a connection at the other end thereof with a nose mask. A microcontroller has an operational “Mask-Fit” mode. An initial constant pressure level is applied by the blower to the mask. If the functional mode is a manual mode, then the mask-fit test pressure is the current ‘set’ pressure. If the functional mode is the automatic titration mode, the mask-fit test pressure is the 95th percentile pressure of the previous session, otherwise it is the base treatment pressure, e.g. 10-12 cm H2O. This constant pressure is applied for a period of time, typically 1-3 minutes.

Abstract: CPAP treatment apparatus (10), as one form of positive pressure ventilatory assistance, is disclosed. A turbine/blower (14), operated by a mechanically coupled electrical motor (16), receives air or breathable gas at an inlet (18) thereof, and supplies the breathable gas at a delivery pressure to a delivery tube/hose (20) having connection at the other end thereof with a nose mask (12). A microcontroller (38) has an operational “Mask-Fit” mode. An initial constant pressure level is applied by the blower (14) to the mask (12). If the functional mode is a Manual mode, then the mask-fit test pressure is the current ‘set’ pressure. If the functional mode is the Automatic Titration mode, the mask-fit test pressure is the 95th percentile pressure of the previous session, otherwise it is the base treatment pressure, e.g. 10-12 cm H2O. This constant pressure is applied for a period of time, typically 1-3 minutes.

Abstract: The occurrence of an arousal in a patient associated with an apneic or hypopneic episode car be determined. Sensors are placed on a patient to obtain signals representative of at least two physiological variables, for example skin conductance, heart rate and blood oxygen concentration. The signals are conditioned by conditioning circuitry, then processed by a processor to correlate at least two thereof. A coincident change in at least two of the processed signals is indicative of the occurrence of an arousal, that in turn indicates an apneic or hypopneic episode has occurred. A patient thus can be diagnosed as suffering conditions such as obstructive sleep apnea.

Abstract: A flow generator for the supply of breathable gas, which includes an electric motor driving a turbine, control circuitry, a pressure transducer to sense delivery pressure at or remote from said flow generator and whose electrical output is connected to the control circuitry, and sensing means connected to the control circuitry, and wherein the control circuitry is operable to determine from the sensing means whether the electric motor or the turbine are operating and from the pressure transducer whether there is no pressure activity, and if both determinations are satisfied, to accept the output of the transducer as a calibrated pressure offset value representative of atmospheric pressure.

Abstract: The occurrence of an arousal in a patient associated with an apneic or hypopneic episode can be determined. Sensors are placed on a patient to obtain signals representative of at least two physiological variables, for example skin conductance, heart rate, and blood oxygen concentration. The signals are conditioned by conditioning circuitry, then processed by a processor to correlate at least two thereof. A coincident change in at least two of the processed signals is indicative of the occurrence of an arousal, that in turn indicates an apneic or hypopneic episode has occurred. A patient thus can be diagnosed as suffering conditions such as obstructive sleep apnea.

Abstract: A ventilating system for supplying a patient with respiratory gas has an apparatus for measuring a respiratory gas flow curve 27 and a respiratory gas pressure curve 28 and has an evaluation circuit 8 for processing at least the respiratory gas flow curve and switching over the respiratory phases. As switchover values from one respiratory phase to the other, the evaluation circuit 8 utilizes predetermined trigger thresholds T.sub.IL, T.sub.EL of the respiratory gas flow curve 27. The ventilating system is improved in such a manner that a good adaptation thereof to the breathing effort of the patient 2 is provided even when leakage is present. This task is solved in that, in the evaluation circuit, the respiratory gas flow curve 27 and the respiratory gas pressure curve 28 are logically coupled during both the inspiratory phase and the expiratory phase. This logic operation takes place in accordance with a predetermined function. From the foregoing, an inspiratory trigger ancillary threshold Z.sub.