Abstract: An example cannula may include a cannula body defining an exhalation lumen configured to receive a volume of exhalation from a patient. The cannula body defines an oxygen inlet at a surface of the cannula body. The cannula body defines a plurality of elongated oxygen delivery openings fluidically coupled to the oxygen inlet and being arranged and sized to deliver substantially symmetrical oxygen flow to nostrils of the patient.

Abstract: An example cannula may include a cannula body and at least one prong extending from the cannula body. The cannula body defines an exhalation lumen configured to receive a volume of exhalation from a patient. The at least one prong defines a prong lumen fluidically coupled to the exhalation lumen. The prong lumen extends to a prong opening configured to introduce the volume of exhalation from the patient into the exhalation lumen. At least a portion of the prong opening faces radially outward from the at least one prong.

Abstract: A connector connection indicator is mounted in a Luer male connector, or in a Luer female connector, to indicate proper mating of the two Luer connectors. The connection indicator may be or include a light source, a sound producing device (e.g., buzzer), a switch, a tactile connection indicator or an electronic chip. The electronic chip may be interposed between two conductive elements that are mounted in the Luer female connector. When the two Luer connectors are properly engaged, the electronic chip is powered via two electrical terminals. While the electronic chip is powered up it communicates with an external system via two electrical terminals. The external system interprets the communication with the electronic chip as an indication to proper engagement of the two Luer connectors. Some of the connection indicators may be mounted on a circuit board that is embedded in a void in the Luer male connector.

Abstract: A connector connection indicator is mounted in a Luer male connector, or in a Luer female connector, to indicate proper mating of the two Luer connectors. The connection indicator may be or include a light source, a sound producing device (e.g., buzzer), a switch, a tactile connection indicator or an electronic chip. The electronic chip may be interposed between two conductive elements that are mounted in the Luer female connector. When the two Luer connectors are properly engaged, the electronic chip is powered via two electrical terminals. While the electronic chip is powered up it communicates with an external system via two electrical terminals. The external system interprets the communication with the electronic chip as an indication to proper engagement of the two Luer connectors. Some of the connection indicators may be mounted on a circuit board that is embedded in a void in the Luer male connector.

Abstract: A connector connection indicator is mounted in a Luer male connector, or in a Luer female connector, to indicate proper mating of the two Luer connectors. The connection indicator may be or include a light source, a sound producing device (e.g., buzzer), a switch, a tactile connection indicator or an electronic chip. The electronic chip may be interposed between two conductive elements that are mounted in the Luer female connector. When the two Luer connectors are properly engaged, the electronic chip is powered via two electrical terminals. While the electronic chip is powered up it communicates with an external system via two electrical terminals. The external system interprets the communication with the electronic chip as an indication to proper engagement of the two Luer connectors. Some of the connection indicators may be mounted on a circuit board that is embedded in a void in the Luer male connector.

Abstract: A sensor for detecting concentration of a component in a breath sample including a gas sampling cell having an inlet, an outlet, a light source, a first light detector, a sampling channel configured to receive gas samples from the inlet; the sampling channel defining a light path between said light source and said first light detector; and a volume occupying material located within the sampling channel, the volume occupying material having an absorption coefficient for mid-infra-red light below 0.5 cm?1 at room temperature.

Abstract: A connector connection indicator is mounted in a Luer male connector, or in a Luer female connector, to indicate proper mating of the two Luer connectors. The connection indicator may be or include a light source, a sound producing device (e.g., buzzer), a switch, a tactile connection indicator or an electronic chip. The electronic chip may be interposed between two conductive elements that are mounted in the Luer female connector. When the two Luer connectors are properly engaged, the electronic chip is powered via two electrical terminals. While the electronic chip is powered up it communicates with an external system via two electrical terminals. The external system interprets the communication with the electronic chip as an indication to proper engagement of the two Luer connectors. Some of the connection indicators may be mounted on a circuit board that is embedded in a void in the Luer male connector.

Abstract: A sensor for detecting concentration of a component in a breath sample including a gas sampling cell having an inlet, an outlet, a light source, a first light detector, a sampling channel configured to receive gas samples from the inlet; the sampling channel defining a light path between said light source and said first light detector; and a volume occupying material located within the sampling channel, the volume occupying material having an absorption coefficient for mid-infra-red light below 0.5 cm?1 at room temperature.

Abstract: A filtering device for use in breath sampling including a filter configured to absorb moisture, a first connector configured to allow connection of a user interface to the filtering device, and a second connector configured for connection to the gas analyzer; wherein the filter is essentially flat, such that when the filtering device is connected to a gas analyzer, the filter is in-line with a panel of the gas analyzer; and wherein a circumference of the first and second connectors are smaller than a circumference of the filter.

Abstract: A tubeless patient interface including a grasping member configured to grasp a patient's nose or tooth; and a miniature CO2 sensor attached to the grasping member and configured to measure the concentration of CO2 from a patient's breath flow.

Abstract: Breath sampling tube having an array of reservoirs, the array of reservoirs including a first reservoir proximate to a device end of the tube and at least one intermediate reservoir; the first reservoir having an inner wall defining a channel, a hydrophobic element and a hydrophilic element; and the at least one intermediate reservoir having an inner wall defining a channel and a hydrophilic element; wherein the array of reservoirs is configured to allow unabsorbed water vapor to proceed through the at least one intermediate reservoir while essentially blocking unabsorbed water vapor from passing through the first reservoir.