Abstract: A device arranged to be in fluid communication with a patient interface arranged to be in communication with an airway of a patient during respiratory therapy, the device comprising: an inlet for receiving a breathable gas from a respiratory apparatus; an outlet for conveying the breathable gas to the patient interface; a body portion extending between the inlet and the outlet, wherein the body portion includes a trigger port, and one or more sensors, wherein output of the one or more sensors is used to determine a status of the trigger port.

Abstract: A valve for use with a respiratory system arranged to convey a breathable gas to a patient. wherein the valve allows gas from within the respiratory system to exit, comprising: a valve body including an inlet and an outlet. said inlet configured to be in fluid communication with the respiratory system: an actuator disposed within the valve body. in a flow path between the inlet and the outlet. wherein the actuator is biased towards the inlet and movement of the actuator away from the inlet being at least partially dependent on a pressure of the gas at the inlet. said movement adjusting the flow path between the inlet and the outlet. to regulate the pressure of the gas in the respiratory system within a predetermined range.

Abstract: This invention relates to a breath indicator for providing an indication of an inhalation and/or exhalation state of a user. Said breath indicator comprising a body comprising a gas sampling portion configured for receipt of a user's inhalation and/or exhalation gases, and an indicator portion. Said gas sampling portion in fluid communication with said indicator portion. Said indicator portion comprising at least a first region and at least a second region, the first region comprising a gas parameter detecting material capable of changing between an initial visual state and a subsequent visual state indicative of detection of a gas parameter of inhalation and/or exhalation gases of said user; and wherein said initial visual state and/or said subsequent visual state of the first region visually contrasts with a visual state of at least said second region.