A medical photometer includes a signal producing section that produces a first control signal to emit a first light having a first wavelength, a second control signal to emit a second light having a second wavelength, a third control signal to emit a third light having a third wavelength, and a fourth control signal to emit a fourth light having a fourth wavelength, a signal acquiring section that acquires a first to fourth intensity signals, a processor, and a memory that stores instructions. In the medical photometer, the first wavelength and the second wavelength are selected as two wavelengths at each of which an extinction coefficient of blood is a first value. The third wavelength and the fourth wavelength are selected as two wavelengths at each of which the extinction coefficient of the blood is a second value which is different from the first value.

A wound monitoring and/or therapy system can include a substantially stretchable substrate supporting a plurality of electronic components, including sensors, and a plurality of electronic connections that connect at least some of the electronic components. The electronic components can also include a circuit board supporting at least one controller configured to control at least some of the sensors, the circuit board configured to operate without failure when the substrate is flexed as a result of strain. A calibration track can be positioned on the substrate and connected to a monitoring circuit configured to measure a change in resistance of the calibration track indicative of resistance change of at least some of the plurality of electronic connections. The system can include a controller with a circuit board supporting a plurality of electrical components and an antenna configured to communicate with the substrate, the antenna at least partially enclosing the circuit board.

A ventilator including a housing; a gas inlet port disposed in the housing and adapted to be coupled to a gas source to receive a flow of gas; a valve assembly coupled with the gas inlet port for controlling flow of gas from the gas inlet port to a gas outlet port disposed in the housing and adapted for being coupled to a patient interface to fluidly couple the gas outlet port to the airway of a patient; a controller module disposed in the housing, the controller module comprising a controller operatively coupled with the valve assembly to control operation of the valve assembly; an airway pressure sensor positioned between the valve assembly and the patient interface to measure air flow output into flowing into the airway of the patient; wherein the pressure sensor is operatively connected to the controller module to control the operation of the valve assembly in response to changes in air flow output measured by the airway pressure sensor during use.

A ventilator including a housing; a gas inlet port disposed in the housing and adapted to be coupled to a gas source to receive a flow of gas; a valve assembly coupled with the gas inlet port for controlling flow of gas from the gas inlet port to a gas outlet port disposed in the housing and adapted for being coupled to a patient interface to fluidly couple the gas outlet port to the airway of a patient; a controller module disposed in the housing, the controller module comprising a controller operatively coupled with the valve assembly to control operation of the valve assembly; an airway pressure sensor positioned between the valve assembly and the patient interface to measure air flow output into flowing into the airway of the patient; wherein the pressure sensor is operatively connected to the controller module to control the operation of the valve assembly in response to changes in air flow output measured by the airway pressure sensor during use.

An audio system adapted to provide an auditory stimulation for inducing neural oscillations in a user during sleep.

An apparatus for controlling positioning of a subject's jawbone including an expandable device expandable to apply a force on the subject's jawbone in a direction of an anterior position with respect to a subject's skull; a mounting device holding the expandable device in proximity to the subject's jawbone to facilitate application of the force on the subject's jawbone and configured to position the expandable device behind the subject's jawbone such that application of the force on the subject's jawbone rotates the subject's jawbone relative to the subject's skull towards the anterior position; and a control system configured to control the force in response to the control system receiving an indication of a change in at least one of: an oxygen level of the subject; a gas flow rate of therapy gas supplied to the subject; a position and/or orientation of the subject; and/or a sleep state of the subject.

An apparatus for controlling positioning of a subject's jawbone including an expandable device expandable to apply a force on the subject's jawbone in a direction of an anterior position with respect to a subject's skull; a mounting device holding the expandable device in proximity to the subject's jawbone to facilitate application of the force on the subject's jawbone and configured to position the expandable device behind the subject's jawbone such that application of the force on the subject's jawbone rotates the subject's jawbone relative to the subject's skull towards the anterior position; and a control system configured to control the force in response to the control system receiving an indication of a change in at least one of: an oxygen level of the subject; a gas flow rate of therapy gas supplied to the subject; a position and/or orientation of the subject; and/or a sleep state of the subject.

A method includes applying, via a respiratory therapy system, initial therapy settings for a user during a first sleep session in which the user uses the respiratory therapy system. First physiological data, which is received from one or more sensors, is generated during the first sleep session. Modified therapy settings are applied, via the respiratory therapy system, during a second sleep session of the user. Second physiological data is received from the one or more sensors. The second physiological data is generated by the one or more sensors during the second sleep session. A set of sleep-related parameters is determined based on changes between the first physiological data and the second physiological data. One or more of a recommended therapy or recommended therapy settings is determined based on the set of sleep-related parameters.

The invention discloses a noninvasive spontaneous respiratory monitoring device, which comprises a sensing patch that can be placed in proximity to the nasal airway of a patient. The sensing patch measures both the flow profile and carbon dioxide concentration of a patient and wirelessly transmits the acquired data to the control circuitry for synchronizing the respiratory support of a mechanical ventilator. The device can also be used as a standalone unit for monitoring for the diagnosis purposes the spontaneous respiratory function of a patient with respiratory dysfunction.

In certain example embodiments, an air delivery system includes a controllable flow generator operable to generate a supply of pressurized breathable gas to be provided to a patient for treatment and a pulse oximeter. In certain example embodiments, the pulse oximeter is configured to determine, for example, a measure of patient effort during a treatment period and provide a patient effort signal for input to control operation of the flow generator. Oximeter plethysmogram data may be used, for example, to determine estimated breath phase; sleep structure information; autonomic improvement in response to therapy; information relating to relative breathing effort, breathing frequency, and/or breathing phase; vasoconstrictive response, etc. Such data may be useful in diagnostic systems.