Combined detection device and combined detection method for methane and hydrogen in exhaled breath

By designing a gas collection module and a diversion module, the exhaled gas is divided into two independent gas paths for the detection of methane and hydrogen, respectively. This solves the problem of cross-sensitivity interference in existing technologies and achieves efficient and accurate joint detection, which is suitable for home self-testing and primary healthcare screening.

CN122306753APending Publication Date: 2026-06-30SHENZHEN UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN UNIV
Filing Date
2026-04-28
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing technologies for the combined detection of methane and hydrogen in exhaled breath suffer from cross-sensitivity interference, resulting in inaccurate test results and an inability to comprehensively assess the metabolic profile of gut microbiota. Furthermore, these devices are costly and bulky, making them unsuitable for home self-testing and primary healthcare screening.

Method used

The system employs a combined design of a gas acquisition module, a diversion module, and a detection component. The diversion module divides exhaled gas into two independent gas paths, which are then delivered to the methane detection optical module and the hydrogen detection module, respectively. Independent detection is performed using laser absorption spectroscopy and semiconductor catalytic combustion methods, while the main control module handles signal processing and concentration calculation.

Benefits of technology

It enables simultaneous joint detection of methane and hydrogen, avoids cross-sensitivity interference, improves the accuracy and reliability of detection results, provides comprehensive gut microbiota metabolic data, and reduces equipment cost and size.

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Abstract

This invention discloses a combined detection device and method for methane and hydrogen in exhaled breath. The combined detection device includes a gas acquisition module, a diversion module, a detection component, and a main control module. The inlet of the diversion module is connected to the outlet of the gas acquisition module. The detection component includes a methane detection optical module and a hydrogen detection module. The diversion module has two outlets, one of which is connected to the inlet of the methane detection optical module, and the other outlet is connected to the inlet of the hydrogen detection module. The main control module is electrically connected to the signal output terminals of the methane detection optical module and the hydrogen detection module to obtain the methane concentration detected by the methane detection optical module and the hydrogen concentration detected by the hydrogen detection module in exhaled breath. This invention avoids cross-interference during detection through the design of independent gas paths and achieves efficient and accurate combined detection of methane and hydrogen.
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