The fat burning analyzer includes a sampling part, an analysis unit and a processing unit. The sampling part collects a breath sample from the user, information on the conditions of the breath sample collection, and provides a sampling signal correlated to the collection condition of the breath sample. The analysis unit provides a detection signal corresponding to an acetone concentration in the collected breath sample and, as such, provides information on the breath acetone of the user (during exercise or resting). The processing unit receives the sampling signal and/or detection signal, and evaluates the sampling signal and/or the detection signal. The evaluation provides information correlated to the fat burning intensity of the user. These information can be provided as an output signal by the processing unit. Accordingly, the processing unit is equipped to provide an output signal correlated to the fat burning intensity of the user.

Various embodiments of the disclosed technology present a structural foundation for volumetric flow reconstructions for expiratory modeling enabled through multi-modal imaging for pulmonology. In some embodiments, this integrated multi-modal system includes infrared (IR) imaging, thermal imaging of carbon dioxide (CO.sub.2), depth imaging (D), and visible spectrum imaging. These multiple image modalities can be integrated into flow models of exhale behaviors enable the creation of three-dimensional volume reconstructions based on visualized CO.sub.2 distributions over time, formulating a four-dimensional exhale model which can be used to estimate various pulmonological traits (e.g., breathing rate, flow rate, exhale velocity, nose/mouth distribution, tidal volume estimation, and CO.sub.2 density distributions). Various embodiments also enable the accurate acquisition of numerous pulmonary metrics that are then stored within distributed systems for respiratory data analytics and feature extraction through deep learning embodiments.

Various embodiments of the present technology present a structural foundation for respiratory analysis of turbulent exhale flows through a technique called Thin Medium Thermal Imaging (TMTI). TMTI is a respiration monitoring method that uses a thin medium and thermal imaging to sense breathing activity. This technique is presented as an alternative to existing non-contact methods of respiratory analysis. As with all non-contact methods, remote monitoring of patients' respiratory behaviors preserves patient comfort. However, unlike other respiratory monitoring methods, the TMTI method monitors respiration directly, and can therefore provide more respiratory information than other non-contact methods. Various embodiments may make use of different medium materials, different measurement setups, additional thermal imaging cameras and sensors, and setups with entertainment media such as Virtual Reality (VR). Various software resources may be used to process data produced from the TMTI method, such as image processing, signal processing, and machine learning algorithms.

A system including a first sampling portion configured to sample inhalation gas made up of a first gaseous mixture, a second sampling portion configured to sample exhalation gas made up of a second gaseous mixture, a gas analyzer configured to measure gas concentrations, a switching valve that controls flow of the sampled inhalation gas and the sampled exhalation gas to the gas analyzer so as to alternately measure concentration of gaseous components within the first and second gaseous mixtures, a humidity control system that maintains humidity within the first and second gaseous mixtures to a predetermined humidity level, and a calculation section configured to calculate concentration differences of the gaseous components between the first and second gaseous mixtures.

A method, system and apparatus for assessing the coupling between lung perfusion and ventilation in a patient who is mechanically ventilated or who is breathing spontaneously through a conventional artificial airway is provided. Embodiments of the apparatus comprise an adaptor configured to fit between the artificial airway and mechanical ventilator, a measuring chamber in constant fluid communication with the adaptor via one or more measuring chamber sampling ports, and a monitoring unit where data obtained from temperature and relative humidity sensors located in the measuring is calibrated, sampled, logged and analyzed together with anthropometric patient data to display a coupling index Qi and to enable ongoing diagnostic cardio-pulmonary monitoring of a patient by comparing changes in the patient's index during a monitoring interval.

A breath analyzer device includes a tube for communicating a breath sample from a user of the breath analyzer device, the tube having a first opening where the breath sample enters and a second opening where the breath sample exits. The tube is adapted to provide minimal restrictions on the flow of the breath sample. The device also includes an oxygen sensor and carbon dioxide sensor disposed partially within the tube and adapted to detecting an amount of oxygen and carbon dioxide present in the breath sample respectively. The device also includes a controller adapted to receive data from the oxygen sensor and the carbon dioxide sensor.

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, e.g., in an L shape, makes it possible to increase the flow tube's propagation length without increasing the flow tube's lever arm length.

An exhalation measurement device includes: a chamber to retain exhalation; a reference gas generator 17 to generate a reference gas; a measurement device 12 to measure concentrations of exhalation being retained in the chamber and a specific gas within the reference gas; a gas transporter 18 including a pump 11 to selectively transport the exhalation being retained in the chamber and the reference gas generated by the reference gas generator to the measurement device; and a control circuit 50 to control an operation of the gas transporter. The reference gas generator 17 includes: a case 19 having an intake port and an exhaust port, and an aeration path connecting the intake port and the exhaust port; a first filter 23 having a first aperture and a second aperture respectively on the intake port side and the exhaust port side in the aeration path within the case 19, the first filter 23 being disposed in the aeration path to adsorb the specific gas; and a supply tube 29 having a third aperture and a fourth aperture, the fourth aperture being connected to the intake port of the case. A distance from the third aperture of the supply tube to the first aperture of the first filter is longer than a distance between the first aperture and the second aperture of the first filter.

A system containing a sensor suitable for pilot respiration inhalation gas data collection and a sensor suitable for pilot respiration exhalation gas data collection can be interfaced to a host computer or operate autonomously. The system or sensor components thereof can be used as a research tool for in-flight monitoring of physiologic effects on pilots' performance caused by the unique conditions faced during flight, in addition to human factors engendered during the course of their duty (fatigue, sleep loss, etc.).

Measuring device (1) for analyzing a respiratory gas flow, comprising at least one measuring unit (4) and a cuvette (5), the cuvette (5) being releasably connected to the measuring unit (4) and being adapted and configured so that a respiratory gas flows through said cuvette, the measuring unit (4) having at least two sensor units (41, 42), at least one sensor unit (41) being configured to determine a respiratory gas flow and at least one sensor unit (42) being configured to determine a CO2 concentration in a respiratory gas, and the cuvette (5) comprising at least two sensor connections (51, 52) for connecting the sensor units (41, 42) for determining at least one respiratory gas flow and at least one CO2 concentration of a respiratory gas.