The present disclosure presents methods, systems and devices for performing capnography (respiratory CO.sub.2) monitoring using a respiratory CO.sub.2 sensor and a breath tracking mechanism for tracking and/or detecting phases of the breath wherein the measurements of the CO.sub.2 sensor may provide baseline CO.sub.2 values, and modulate/quantify the respiratory CO.sub.2 levels according to the baseline values.

Ventilation masks are disclosed herein including a mask body and a gas manifold coupled to the mask body to form a gas channel for directing a gas through a gas port to create a curtain effect gas flow within the patient cavity and form a gas curtain within the patient cavity and adjacent to at least one vent opening formed through the mask body, and a sampling cover couplable with the mask body to form a sampling channel between a sampling portal of the sampling cover and a sensing port, where the sampling portal is formed by a protrusion of the sampling cover that extends into the vent opening and can extend toward a patient cavity formed by an inner surface of the mask body.

A conventional flow tube for a metabolic cart is usually a straight length of pipe whose inner diameter is fixed by the respiratory burden imposed by the flow tube on the user, with a smaller diameter imposing a higher respiratory burden. The ratio of the straight flow tube's length to diameter is fixed by fluid dynamics, so increasing the flow tube's diameter causes the flow tube's length to increase. As the flow tube gets longer, it exerts more torque on the user's neck and jaw, creating discomfort. Reducing the flow tube's length causes an undesired increase in the respiratory burden but increasing the flow tube's diameter to reduce the respiratory burden makes the flow tube less comfortable, making the flow tube unconformable, hard to breathe through, or both. Bending the flow tube makes it possible to increase the flow tube's propagation length without increasing the flow tube's lever arm length.

The present disclosure provides generally for a therapeutic oral device for sleep apnea and associated methods for using the device. According to the present disclosure, the device may comprise a hard palate portion, mouth guard portion, and a tongue retainer portion. The hard palate portion may comprise one or more materials. The hard palate portion may also comprise a composite of materials, including but not limited to embedded materials. The mouth guard portion may comprise one or more components that provide stability and maintain the position of the therapeutic oral device within the mouth. The tongue retainer portion may comprise an airway and a predetermined length. A method of use may comprise the utilization of one or more incremental oral devices to overcome a gag reflex. When the oral device is formed from a mold, the mouth guard portion and the hard palate portion may be custom fit to the dimensions of the intended mouth.

The present invention relates to provide, among other things, the methods, devices, and systems that can simply and quickly collecting and analyzing a tiny amount of vapor condensates (e.g. exhaled breath condensate (EBC)).

A system and method for prompting a patient experiencing ventilatory depression to breathe includes at least one sensor for detecting ventilatory depression by detecting inadequate breathing or lack of breathing in the patient. The system also includes one or more sensors for determining the type of breathing problem experienced by the patient. A sensor for detecting motion of the patient is used to determine whether the patient is moving. If inadequate or a lack of breathing is detected and the patient is not moving, the system provides verbal prompts or tactile stimuli to prompt the patient to breathe to improve patient ventilation.

A multivariate spirometer and associated systems and methods are described. The spirometer has a housing defining a flow path and one or more sensors for detecting CO.sub.2 concentration values, temperature and/or flow rates of air in the flow path. The spirometer may be configured to generate time series data by sampling CO.sub.2 concentration values, temperature and/or flow rates at a predetermined frequency during inhalation and/or exhalation. Optionally, a processor is used to generate one or more output readings based on the CO.sub.2 concentration values, temperatures and/or flow rates.

A method of method of high flow oxygen therapy (HFOT) and carbon dioxide (CO.sub.2) monitoring includes delivering high flow oxygen therapy (HFOT) via a central lumen of a nasal cannula, the nasal cannula comprising a proximal end, a distal end positioned within a pharynx region of a patient's airway, and the central lumen and a sampling lumen formed within a wall of the nasal cannula. The method also includes receiving sampled exhaled breath of the patient via the sampling lumen at a CO.sub.2 monitor, wherein the sampling lumen is configured to sample the exhaled breath at the pharynx region through the CO2-permeable membrane and direct the sampled exhaled breath to a CO.sub.2 monitor fluidly coupled to the sampling lumen and determining a level of CO.sub.2 in the exhaled breath using the CO.sub.2 monitor.

A smart face mask comprising a mask body; a temperature sensor; a respiration sensor; and a transmitter for transmitting information from the temperature sensor, the respiration sensor and a geotracker to a smart phone or smart watch.

The invention provides a method for obtaining a filtered capnography signal by suppressing a spectral background signal within an optical absorption signal. An optical absorption signal is obtained from a subject across a range of wavelengths, wherein the optical absorption signal represents a proportion of a light signal that is absorbed as the light signal passes through a respiratory air sample undergoing investigation, and wherein the optical absorption signal comprises a spectral background signal. A second harmonic signal is isolated from the optical absorption signal and the period of the spectral background signal is identified. The second harmonic signal is sampled at a central wavelength of the second harmonic signal, wherein the central wavelength represents a maximum Carbon Dioxide absorption, an at an off-center wavelength of the second harmonic signal, wherein the off-center wavelength and the central wavelength are separated by a multiple of the period of the spectral background signal. A filtered capnography signal is then generated based on the sampled second harmonic signal.