45 results about "Breath gas analysis" patented technology

An indirect calorimeter for measuring the metabolic rate of a subject includes a disposable portion and a reusable portion. The disposable portion includes a respiratory connector configured to be supported in contact with the subject so as to pass inhaled and exhaled gases as the subject breathes. The disposable portion also includes a flow pathway operable to receive and pass inhaled and exhaled gases, having a first end in fluid communication with the respiratory connector and a second end in fluid communication with a source and sink for respiratory gases. The disposable portion is disposed within the reusable portion, which includes a flow meter, a component gas concentration sensor, and a computation unit. The flow meter generates a signal as a function of the instantaneous flow volume of respiratory gases passing through the flow pathway and the component gas concentration sensor generates a signal as a function of the instantaneous fraction of a predetermined component gas in the exhaled gases. The computation unit receives the electrical signals from the flow meter and the concentration sensor and calculates at least one respiratory parameter for the subject as the subject breathes through the calorimeter.

A method of determining a respiratory parameter for a subject using an indirect calorimeter is provided. The indirect calorimeter includes a respiratory connector for passing inhaled and exhaled gases, a flow pathway operable to receive and pass inhaled and exhaled gases having a flow tube within the flow pathway through which the inhaled and exhaled gases pass, a flow meter for determining an instantaneous flow volume of the inhaled and exhaled gases, a component gas concentration sensor for determining an instantaneous fraction of a predetermined component gas and a computation unit having a processor and a memory. The method includes the steps of initializing the indirect calorimeter and the subject breathing into the respiratory connector if the indirect calorimeter is initialized, sensing the flow volume of the inhaled and exhaled gases passing through the flow pathway using the flow meter and transmitting a signal representing the sensed flow volume to the computation unit. The method also includes the steps of sensing a concentration of a predetermined component gas as the inhaled and exhaled gases pass through the flow pathway using the component gas sensor, and transmitting a signal representing the sensed concentration of the predetermined component gas to the computation unit. The method further includes the steps of calculating at least one respiratory parameter for the subject as the subject breathes through the calorimeter using the sensed flow volume and the sensed concentration of the predetermined component gas, and providing the subject with the at least one respiratory parameter.

A method for controlling a deposition process, includes providing a wafer in a chamber of a deposition tool, the deposition tool being adapted to operate in accordance with a recipe; providing reactant gases to the chamber, the reactant gases reacting to form a layer on the wafer; allowing exhaust gases to exit the chamber; measuring characteristics of exhaust gases; and changing the recipe based on the characteristics of the exhaust gases. A deposition tool includes a chamber, a gas supply line, a gas exhaust line, a gas analyzer, and a controller. The chamber is adapted to receive a wafer. The gas supply line is coupled to the chamber for providing reactive gases. The gas exhaust line is coupled to the chamber for receiving exhaust gases. The gas analyzer is coupled to the gas exhaust line and adapted to determine characteristics of the exhaust gases. The controller is adapted to control the processing of the wafer in the chamber based on the characteristics of the exhaust gases.

New systems and methods for remotely monitoring the activity, security, and health of an individual are provided. The monitoring system can be used to monitor both residence security and typical residential activity that is linked to the well being and health of an individual and can alert a third party when there is a digression from a predetermined set parameters. The monitoring system can incorporate a number of sensing elements including door opening and closing detection elements, passive infrared sensors, energy sensors for detecting the turning on and off of general household appliances, weighing scales, systolic blood pressure or pulse pressure measurement apparatus, bioelectrical impedance analysis measurement apparatus, breath analysis, and blood-based biological marker detection and quantification.

Handling of the condensate collecting vessel in conventional breath analysis apparatuses having a cold condensation mechanism is complicated, and time consuming.

The present invention provides a method for analyzing exhaled breath using a breath analysis apparatus, the breath analysis apparatus including: a vessel; an injection port of the exhaled breath; an outlet port of the exhaled breath; a cooling unit; an electrode zone; a counter electrode zone; and a chemical substance detection unit, in which the exhaled breath contains water vapor and a volatile organic compound, the volatile organic compound having a molecular weight of no lower than 15 and no higher than 500, and the method for exhaled breath analysis comprising the steps of: injecting the exhaled breath from the injection port into the vessel; condensing the exhaled breath on the outer peripheral surface of the electrode zone by cooling the electrode zone with the cooling unit; forming charged fine particles from the condensed breath; recovering the charged fine particles into the chemical substance detection unit by an electrostatic force; and detecting the volatile organic compound included in the charged fine particles recovered.

The subject invention is directed to a breath analyzer which is capable of detecting toxic gas levels from breath analysis. The subject invention includes a mouthpiece which is in communication with a plurality of discrete chambers, such as first and second discrete chambers, each being provided with a separate probe for breath analysis. The probes are connected to analyzers for determining detected levels of gas. In a first embodiment, a first probe may be provided for carbon monoxide detection with a second probe being provided for hydrogen cyanide detection. Advantageously, with this arrangement, breath analysis may be conducted on-site, for example at the site of a fire, to quickly and simultaneously determine carbon monoxide and hydrogen cyanide levels in a person's blood stream. In a second embodiment, a first probe may be provided for detection of carbon monoxide and a second probe may be provided for detection of hydrogen. With this arrangement, a calibrated correction of measured carbon monoxide data can be made to correct for improperly detected hydrogen. As such, a highly accurate on-site measurement for carbon monoxide can be achieved.

A liquid separation apparatus for removing a liquid from a respiratory gas is provided. The liquid separation apparatus comprises a housing that comprises an input, wherein a sample withdrawn from the respiratory gas is delivered through the input; a first output wherein at least part of the sample of the respiratory gas is discharged through the first output; and a first filter configured to remove the liquid from the sample of respiratory gas flowing through the input and the first output of the housing. The first filter comprises a hydrophobic property and an oleophobic property to remove the liquid when a surface tension of the liquid is lower than a surface tension of bodily fluids.

The invention discloses a respiratory monitoring and breath analysis system, belongs to the field of medical equipment, and particularly relates to a respiratory mechanics monitoring and breath constituent analysis device. By means of the respiratory monitoring and expiration analysis system, respiratory mechanics parameters of a human body, enrichment breath sol particles and volatile organic compounds (VOCs) can be detected and analyzed. The respiratory monitoring and breath analysis system mainly comprises a respiratory mechanics parameter detection module, a breath constituent enrichment detection module and a data processing module. The respiratory mechanics parameter detection module comprises a temperature and humidity sensor, a flow sensor, an air flow direction sensor and a respiratory mechanics parameter auxiliary detection part. The breath constituent enrichment detection module mainly comprises a breath constituent enrichment module and a breath constituent analysis module. The respiratory monitoring and breath analysis system can be used for respiratory monitoring and breath constituent analysis of patients suffering from respiratory diseases and early auxiliary screening of some diseases such as lung cancer, and can also be used for daily physical examination.

The present invention is one that, even while cooling exhaust gas without dilution, makes it possible to accurately measure particle concentration, and provided with: a particle concentration measurement device; a sampling cooling pipe that cools the exhaust gas collected from an exhaust gas transfer pipe to a measurable temperature of the particle concentration measurement device without dilution, and introduces the cooled exhaust gas into the particle concentration measurement device; a temperature sensor that detects temperature of the exhaust gas flowing into an exhaust gas inlet; and a calculation device that, from the detected temperature by the temperature sensor and the temperature of the exhaust gas introduced into the particle concentration measurement device, corrects measured particle concentration by the particle concentration measurement device in real time to calculate the particle concentration of the exhaust gas flowing through the exhaust gas transfer pipe.

An exhaust gas analysis system of the present invention includes: an exhaust gas collecting device for collecting exhaust gas from an exhaust pipe; and exhaust gas analysis equipment for analyzing the exhaust gas. The exhaust gas collecting device includes: an exhaust gas collecting part which is provided at an exhaust gas discharge port of the exhaust pipe, having an exhaust gas collecting port that is larger than the exhaust gas discharge port, for collecting air around the exhaust gas discharge port together with the exhaust gas; a main flow passage which is connected to the exhaust gas collecting part and in which the exhaust gas and the air collected from the exhaust gas collecting part flow; and an exhaust gas detecting mechanism for continuously detecting a predetermined component contained in the exhaust gas in the vicinity of the exhaust gas collecting port in the exhaust gas collecting part.

An airway adapter. The airway adapter has a sampling chamber for allowing a respiratory gas flow. The airway adapter also has a sensor for acquiring a signal needed for a respiratory gas analysis. The sensor is integrated into the airway adapter and which sensor comprises an electrolyte being in contact with the respiratory gas flowing in the sampling chamber and which electrolyte contact with the respiratory gas is a basis for respiratory gas analysis.

The invention discloses a respiratory gas analysis device including a laser, a flight tube, a photoelectric detector, a piezoelectric synchronous trigger, a gas inlet, a vacuum pump and a controller, wherein the flight tube is internally provided with a first annular electrode, a second annular electrode and a third annular electrode at intervals, a region between the first annular electrode and the second annular electrode is a reversed electric field region, and a region between the second annular electrode and the third annular electrode is a forward electric field region. A laser ionization flight time mass spectrometry method is used for real-time on-line analysis of samples, and has the advantages of short analysis time, large detectable molecular weight, high sensitivity for analysis, good reproducibility of detection results, and stable performance; the device has the advantages of simple structure, low production cost, no any trauma to detected patients, and is conducive to large-scale popularization and application.

The invention relates to the field of trace gas analysis, aims to provide a gas path structure having simple structure and reliable gas tightness, and particularly provides the integrated gas path structure for a trace gas analyzer. The integrated gas path structure comprises a test chamber used for penetrating through an air inlet device and formed by a test chamber shell, and an air outlet device, and also comprises an electromagnetic valve accommodating chamber; a test chamber air outlet, a test chamber air inlet and the electromagnetic valve accommodating chamber are connected in sequence and are arranged on the test chamber shell. According to the integrated gas path structure for the trace gas analyzer, component and part accommodating chambers are arranged on the test chamber shell and are connected to form the integrated gas path structure through a built-in connection channel, so that gas path connection points are greatly reduced, and the air tightness and the safety of the gas analyzer are ensured.

Methods and systems are described to obtain and analyze one or more gas samples from the breath of a person, and organizing the samples in a sample registry for subsequent analysis. This technique solves the various problems that are associated with targeting an individual breath for analysis, and allows for additional versatility and options in the analysis process.

A monitoring system is disclosed that includes features for detecting the presence of biomarkers from a gas sample, such as exhaled breath. An assembly may also includes a plurality of sensors to detect biomarkers present in exhaled breath that are associated with respiratory illness. The biomarkers include carbon dioxide, carbon monoxide, and nitric oxide.

Provided is a respiration analysis system using a gas image detection method, the respiration analysis system including: an exhalation capturing unit provided adjacent to a subject and capturing an image of exhalation exhaled from the mouth and nose of the subject; and a control unit electrically connected to the exhalation capturing unit, and calculating and storing, as data, a respiration cycle and respiration volume from the image captured through the exhalation capturing unit. Accordingly, provided is the respiration analysis system using the gas image detection method, in which not only respiration of the subject is measured in a non-contact manner, but also hypopnea is determined by quantifying volume of the exhalation exhaled by the subject, thereby inferring a disease caused by the hypopnea.

To provide an exhaust gas analysis system that can accurately analyze exhaust gas discharged from an engine of a hybrid vehicle and can also be applied to a test that continues sampling into a sampling bag over a predetermined sampling time, a sampling apparatus is adapted to include a main flow path through which the exhaust gas flows, a sampling flow path that is connected to the main flow path to sample the exhaust gas into a sampling bag, and a constant flow rate mechanism that is provided in the main flow path and configured to be able to change a main flow rate that is an exhaust gas flow rate through the main flow path. Additionally, a control device is adapted to control the constant flow rate mechanism to change the main flow rate and change a sampling flow rate that is an exhaust gas flow rate through the sampling flow path.

An exhaust gas analysis system is adapted to include an exhaust gas circulation line through which exhaust gas flows, an exhaust gas collection line adapted to collect the exhaust gas from the exhaust gas circulation line and introduce the collected exhaust gas into an exhaust gas analysis device, a continuous analysis line adapted to, separately from the diluted exhaust gas collection line, collect the exhaust gas from the exhaust gas circulation line for continuous analysis, a continuous analyzer provided in the continuous analysis line, and an information processing unit adapted to, on the basis of an analysis result by the continuous analyzer at the time of the collection into the exhaust gas analysis device, determine whether a measurement result of the exhaust gas introduced into the exhaust gas analysis device falls within a preset range, or determine a measurement range used to measure the exhaust gas introduced into the exhaust gas analysis device.

In order to make it possible to perform exhaust gas analysis by a vehicle-mounted exhaust gas analyzer and the analysis, evaluation, and the like of results of the analysis in consideration of a running state of a surrounding vehicle during the exhaust gas analysis, the vehicle-mounted exhaust gas analyzer mounted in a test vehicle running on a road is adapted to include an exhaust gas data acquisition part adapted to acquire exhaust gas data on exhaust gas discharged from the test vehicle during the run of the test vehicle, and a surrounding vehicle information acquisition part adapted to, from surrounding vehicle sensing means mounted in the test vehicle, acquire surrounding vehicle information that is information on a vehicle running around the test vehicle.

A monitoring system is disclosed that includes features for detecting the presence of biomarkers from a gas sample, such as exhaled breath. An assembly includes a plurality of sensors to detect biomarkers present in exhaled breath that are associated with hyperglycemia. The biomarkers include, without limitation, acetone, ethanol, and methyl nitrate.