A device for collecting exhalation gas and aiding measurement of a trace component in the exhalation gas and the usage method thereof are disclosed. The device comprises an alveolar air bag for storing alveolar air collected from the breath of a subject, a cavity channel air bag for storing cavity channel air from the subject, a three-way pipe, and a mouthpiece. The three-way pipe comprises a first branch pipe, second branch pipe, and third branch pipe communicating with each other. The first branch pipe and the second branch pipe respectively extend in opposing directions along the same axis. The third branch pipe extends along a radial direction of the first branch pipe and the second branch pipe. The mouthpiece communicates with the first branch pipe. An air hole of the cavity channel air bag communicates with the second branch pipe.

Techniques for determining a volume of exhaled CO.sub.2 as a function of time using side-stream capnography, including obtaining flow dynamics measurements of a subject from a flow sensor; obtaining CO.sub.2 concentration measurements of the subject from a side-stream CO.sub.2 monitor; determining a duration of time (ΔT.sub.s1) for a sample of gas to flow from a reference point to the side-stream CO.sub.2 monitor; synchronizing in time the CO.sub.2 concentration measurement with the flow dynamics measurement, based on the determined ΔT.sub.s1; and determining a volume of CO.sub.2 exhaled as a function of time, based on the flow dynamics measurement and the synchronized CO.sub.2 concentration measurement.

Embodiments of the invention include systems and methods for capturing crowd wisdom to be tested for individualized treatment plans. These systems and methods include data mining crowd sourced health related information and unstructured medical narratives and storytelling to identify treatment plans and general techniques that individuals with chronic diseases/symptoms, including but not limited to IBD and other immune invisible neglected and stigmatized diseases, use to improve their general health and wellbeing. A system for testing the treatments effectiveness in a population and then in an individual is also disclosed.

A collecting device (200) for collecting airborne particles comprises: a first (202) and second layer (220) spaced apart for forming a particle collection chamber (240) therebetween, wherein inlets (210) extend through the first layer (202) for transporting a flow of air into the particle collection chamber (240); wherein ends (214) of the inlets (210) face a first surface (222) of the second layer (220) for capturing airborne particles by impaction; wherein outlets (230) extend through the second layer (220) for transporting the flow of air out of the particle collection chamber (240); wherein the inlets (210) and outlets (230) are staggered such that the center axes of the inlets (210) and outlets (230) are displaced from each other; wherein the flow of air experiences a pressure drop lower than 3 kPa at a flow rate of 0.5 liters per second, when the flow of air passes the collecting device (200).

An analyzer and a process analyze a breath sample exhaled by a subject for a predetermined substance, particularly alcohol. An input fluid connection connects an input unit (1) to a measuring chamber (3). A suction fluid connection connects the measuring chamber to a suction chamber unit (5, 6), that is selectively transferrable to a with minimum volume state or a maximum volume state. A sensor (12) measures an amount or a concentration of the substance in the measuring chamber. A drive unit (4, 11) moves a valve (2, 13) for the input fluid connection selectively into a closing or into a releasing end position. The drive unit can also move the suction chamber unit between the two states. The movement of the valve (2, 13) from one end position to the other end position is coupled with a transfer of the suction chamber unit (5, 6) between the two states.

Provided are a gas sensor system, a gas sensor control device, and a control method that enable high-accuracy measurement without causing a user to wait. The gas sensor system (1) includes: a gas sensor (10) that performs concentration measurement of a measurement target gas in air; a heater (17) that heats the gas sensor; an air intake port (11) and an air discharge port (12) that are connected to the gas sensor; and a control device (20) that performs heating control of operating the heater so as to heat the gas sensor. The control device acquires temperature information for the gas sensor and temperature information for a space from which the air intake port takes in air and performs the heating control based on the temperature information for the gas sensor and the temperature information for the space from which the air intake port takes in air.

An automatic pathogen-from-expiration detection system and method is disclosed. The system comprises a gas pathogen recovery unit, a pathogen concentration unit and a sample detection unit. The method comprises: making the sample recovered by the gas pathogen recovery unit enter the pathogen concentration unit; in the pathogen concentration unit, gradually biasing the pathogen particles in the sample to the positive electrode side into the concentration channel under the action of the electrode; applying a fluctuating voltage greater than zero to a single sub-positive electrode, and alternating the voltage of the sub-positive electrode adjacent thereto with the fluctuating voltage, so that a varying potential difference is formed between the adjacent sub-positive electrodes, wherein the pathogen particles are gradually enriched in the middle region of the two adjacent sub-positive electrodes, and the concentrated sample is driven to move to the sample detection unit; and immediately detecting the concentrated sample in the sample detection unit. The detection of the present invention is highly sensitive, low cost and enables the continuous and rapid integrated sampling and detection of pathogens for multiple individuals.

A fixed bed (10) is provided for a fixed-bed reactor (100). The fixed bed (10) contains a particulate carrier and at least one reactive substance. The carrier is a silicate compound and the reactive substance is an organometallic pyridine compound. A method for preparing such a fixed bed is provided. The method includes the steps of preparing the carrier, preparing an impregnation and treating the carrier with the impregnation. In addition, a gas-measuring tube is provided with a correspondingly prepared fixed bed as well. A method uses organometallic pyridinium compounds, especially pyridinium dichromate, in a fixed-bed reactor for detecting alcohol compounds and for preparing formaldehyde and/or acetaldehyde.

Described herein are rapid breath testing devices, systems and methods. The device may include a mouthpiece operable to receive air flow from a breath; and a cassette comprising a biosensor and a cassette conduit, the cassette removably connected to the mouthpiece such that at least a sample of the air flow passes through the cassette conduit and over the biosensor. The biosensor may include a plurality of graphene-based sensors and may be operable to detect at least one volatile organic compound in the air flow sample.

Methods, systems and techniques for the accurate measurement of breath-borne biomarkers are disclosed. Such methods, systems and techniques may be used for the purposes of detection and/or measurement in breath samples of biomarkers, e.g., biomarkers relating to a disease or a physiological condition.