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Self-calibration exhaled gas analysis device

A technology for exhaled gas and analysis equipment, which is applied in the direction of analyzing materials, material analysis by electromagnetic means, measuring devices, etc., can solve the problem of high cost, and achieve the effect of simplifying instrument design and ensuring selectivity.

Active Publication Date: 2013-02-20
SUNVOU MEDICAL ELECTRONICS
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Problems solved by technology

Although calibration can be avoided by frequent replacement of sensors and detection components, the price paid for this may be higher than calibration

Method used

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  • Self-calibration exhaled gas analysis device
  • Self-calibration exhaled gas analysis device
  • Self-calibration exhaled gas analysis device

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Embodiment Construction

[0027] For the detection of exhaled nitric oxide, the expiratory flow and pressure recommended by the "Standard" are 50 ml / s and 5-20 mm water column respectively, and the exhalation time is greater than 6 seconds, so that at least about 300 ml of exhaled breath can be exhaled For the sample, the former part must be discharged because it is the gas in the mouth rather than the airway or lungs, and the latter part is used for detection. In addition, what must be considered is how to discharge the original gas in the gas circuit and components of the detector at the same time, so as to prevent these gases from being mixed into the incoming breath and affect the reliability of the detection.

[0028] The design of the exhalation control module fully considers the requirements of the above standards for exhalation flow, pressure, and time control. The control of exhalation pressure is realized by adjusting the resistance of the air circuit, and the control of exhalation flow is rea...

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Abstract

A self-calibration exhaled gas analysis device comprises an exhalation control module, a sampling module, a detection module and a control module, wherein the exhalation control module and the sampling module are used for exhausting and sampling exhaled gas of an examinee respectively, and the control module is used for controlling the exhalation control module, the sampling module and the detection module and performing information collection, processing, storage and communication. The sampling module comprises at least two gas chambers for temporarily storing part of the exhaled gas, the gas in the gas chambers is directly measured after the concentration of the gas is quantitatively changed by electrolysis, two gas chambers are connected with the detection module through valves, and the detection module comprises a valve, a sensor, a gas pump and a pipeline and is used for respectively leading the gas in at least two gas chambers into the sensor for measurement.

Description

technical field [0001] The invention relates to the field of exhalation gas detection. [0002] Background technique [0003] The use of exhaled nitric oxide as a marker of airway inflammation in the detection and analysis of asthma and other respiratory diseases has been fully affirmed by the medical community. In 1997 and 1999, Europe and the United States formulated the recommended standards for breath nitric oxide testing respectively, and jointly formulated and published the standards in 2005 (“ATS / ERS Recommendations for Standardized Procedures for the Online and Offline Measurement of Exhaled Low Respiratory Nitric Oxide and Nasal Nitric Oxide, 2005", ATS is the abbreviation of American Throat Society, ERC is the abbreviation of European Respiratory Society, hereinafter referred to as "Standard"). The "Standard" is used to guide how to conduct testing and use the testing results for the diagnosis and curative effect evaluation of asthma and other respiratory disease...

Claims

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Application Information

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IPC IPC(8): G01N27/416
Inventor 谢雷韩杰
Owner SUNVOU MEDICAL ELECTRONICS
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