An aerosol delivery system has a nebulizer and a humidifier providing a gas flow to the nebulizer. A controller varies humidity level of the gas flow to the nebulizer so that if the nebulizer is not operating it has about 100% humidity and it is operating the value is less to allow for the humidification effect of the nebulizer. The control may be achieved by dynamically varying proportions of flow through a dry branch and a humidification branch.

A breathing assistance system for delivering a stream of heated, humidified gases to a user, comprising a humidifier unit which holds and heats a volume of water, and which in use receives a flow of gases from a gases source via an inlet port, the flow of gases passing through the humidifier and exiting via an exit port, the system further having a temperature sensor which measures the temperature of the gases exiting the humidifier unit, an ambient temperature sensor which measures the temperature of gases before they enter the humidifier unit, and a flow sensor which measures the flow rate of the gases stream, the system also having a controller which receives data from the temperature and flow sensors, and which determines a control output in response, the control output adjusting the power to the humidifier unit to achieve a desired output at the humidifier unit exit port.

Systems and methods for non-invasive ventilation are provided. The systems may include a gas source that provides breathing gases to a patient through one or more of a primary flow path (PFP) and a flushing flow path (FFP). The system may include a control assembly configured to open and restrict gas flow through the PFP. When the PFP is open, a significant portion of the gas flows through the PFP while the remaining gas flows through the FFP. When the PFP is restricted, a significant portion of the gas flows through the FFP. Increased flow through the FFP may have a high velocity (especially relative to the flow through the PFP). Gas delivered through the FFP may be used to flush dead space. One or both flow paths may contribute to inspiratory positive airway pressure (IPAP), expiratory positive airway pressure (EPAP), and/or positive end expiratory pressure (PEEP).

A humidification value compensation device provided includes a sensor module and a main control module. The sensor module is configured to sense gas flow rate, environmental parameters, and the weight change value of the humidification tank during a predetermined humidification cycle. The environmental parameters include environmental temperature and humidity; The main control module is communicated with the sensor module, including a first calculation module, a second calculation module, an error calculation module, and a compensation value calculation module, which are configured to calculate an actual humidification value based on the gas volume, the weight change value, and the environmental parameters during the predetermined humidification cycle, calculate a target humidification value based on the environmental temperature and corresponding predetermined relative humidity, calculate a humidification error based on the actual humidification value and target humidification value, and calculate the humidification compensation value based on the humidification error and target humidification value.

An apparatus for treating a respiratory disorder in a patient includes a respiratory pressure therapy device that generates a flow of air at positive pressure for treating the respiratory disorder. An air circuit transports the flow of air generated by the respiratory pressure therapy device to a patient interface. A nebuliser module is located at or adjacent to a proximal end of the air circuit to nebulise a liquid to form a nebula of the liquid. The nebula is admitted into the flow of air generated by the respiratory pressure therapy device. A vaporiser is located at the distal end of the air circuit to receive and vaporise the nebula to form a humidified flow of air.

A humidification system comprises a first sensor and a second sensor. The first and second sensors are adapted to sense flow characteristics within the system. The first and second sensors are isolated from the flow by barriers formed by respective first and second sealing members. The sealing members extend through apertures formed in the system and have a portion that contacts the sensing elements of the respective first and second sensors. A cartridge can hold the sensors and provide repeatable penetration depths into a flow passage of the system. A medical tube has a composite structure made of two or more distinct components that are spirally wound to form an elongate tube. One component can be a spirally wound elongate hollow body; the other component can be an elongate structural component spirally wound between turns of the spirally wound hollow body.

A headgear for use with a respiratory mask is described. The headgear can include a continuous and substantially curved elongate member extending, in use, below a user's nose and at least two headgear straps capable of attachment to the ends of the elongate member. A mask attachment on the elongate member is disposed to sit below or on one of the user's nose, mouth, upper lip and an inlet to the mask. The attachment is capable of receiving the mask.

A humidification system has a humidification source and a main gases flow path. The main gases flow path has a low pressure region and a high pressure region. In some embodiments, each of the low pressure region and the high pressure region has an aperture. The pressure difference between the apertures promotes a gases flow between the main gases flow path and the humidification source, and results in humidifying the gases in the main gases flow path.

An oxygen concentrator system including a pressure swing adsorption (PSA) system that executes a PSA cycle to produce an oxygen enriched gas, a gas outlet airline that flows the oxygen enriched gas to a user of the oxygen concentrator, a cannula that receives breathing gas from the user, and a sensor in communication with the cannula and the PSA system. The sensor senses a breathing cycle of the user. The breathing cycle includes an inhalation phase and an exhalation phase and the exhalation phase includes a non-useful period succeeded by a pre-inhalation period. Each respective breath is immediately preceded in the breathing cycle by a preceding breath and is immediately succeeded in the breathing cycle by a succeeding breath. The PSA system actuates a flow of the oxygen enriched gas via the gas outlet airline after the start of inhalation.

Introduced are methods and systems for an adjustable bed device configured to: gather biological signals associated with multiple users, such as heart rate, breathing rate, or temperature; analyze the gathered human biological signals; and heat or cool a bed based on the analysis.