Sampling device for breath nitric oxide measurement

Abstract

The invention provides an exhaled nitric oxide measurement sampling device. The exhaled nitric oxide measurement sampling device is characterized in that a steering machine is used for controlling the turning direction of a rotating cylindrical object, so that the sectional area of gas passing the rotating cylindrical object is controlled so as to realize the purpose of gas flow control, and therefore, when nitric oxide exhaled by a human body is collected, the exhaled gas flow of a subject does not need to be limited. The exhaled nitric oxide measurement sampling device can be used for automatically adjusting the actual exhaled gas flow to required flow so as to collect exhaled gas.

Description

technical field [0001] The present invention relates to the field of breath sampling. Background technique [0002] 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 2005, the American Thoracic Society and the European Respiratory Society jointly developed and announced the standardized method for this measurement "ATS / ERS Recommendations for Standardized Procedures for the Online and Offline Measurement of Exhaled Low Respiratory Nitric Oxide and Nasal Nitric Oxide, 2005", and proposed its clinical application guidelines in 2011 (AnOfficialATS eNO ) for Clinical Applications), these standards and guidelines are used to guide how to conduct detection and use the detection results for the diagnosis and efficacy evaluation of respiratory diseases such as asthma. [0003] The standardized exhaled nitric oxide measurement method recommende...

AI Technical Summary

Problems solved by technology

[0007] 1) The mechanical sampler displays the flow rate through the pressure gauge, and the manual button adjusts the emptying and sampling channels. There are inaccurate pressure measurements and inaccurate emptying time, which may easily cause the gas sampled offline to fail to meet the conditions required by international standards;

[0008] 2) The mechanical sampler is difficult to process (small aperture requires high precision), and production commissioning is difficult. Once the processing fails, it cannot be repaired;

[0009] 3) Insufficient training of subjects or individual differences may easily lead to differences between the air bag test results obtained by offline sampling and online test results, and poor repeatability;

[0010] 4) During the expiratory process of the subject, the pressure caused by the volume expansion of the collection air bag will affect the accuracy of the expiratory flow

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