Exhaled gas detection equipment

Abstract

The invention discloses exhaled gas detection equipment, which comprises a gas collection device used for collecting exhaled gas; a mass spectrometer used for analyzing the exhaled gas to obtain a VOCs mass spectrum; a processor used for extracting VOCs content data from the VOCs mass spectrum, inputting the VOCs content data into a pre-prepared classification model, and outputting to obtain a detection result, wherein the classification model is a nonlinear support vector machine model, and a penalty factor c and a gamma parameter of the classification model are obtained through genetic algorithm optimization; and a display used for displaying the classification model and the detection result. The classification model for detecting the exhaled gas is obtained based on the nonlinear support vector machine, and the penalty factor c and the gamma parameter are obtained through genetic algorithm optimization, so that the stability and the accuracy of the classification model are greatly improved, and the equipment can be applied clinically.

Description

technical field [0001] The invention relates to the technical field of gas detection, in particular to an exhaled gas detection device. Background technique [0002] Exhaled breath analysis can be traced back to ancient Greece. Physicians used the smell of human exhaled breath to assist in the diagnosis of some diseases, such as the smell of rotten apples and diabetes, musty smell and liver disease, and urine ammonia smell related to kidney disease. Exhaled breath detection has been approved by the FDA for clinical use in the diagnosis of certain diseases, such as CO for the diagnosis of neonatal jaundice, 13CO2 for the detection of Helicobacter pylori, NO for the diagnosis of asthma, etc., and currently there are also tests for the diagnosis of lung cancer, esophageal and gastric cancer. , breast cancer research. [0003] The basic principle of detecting specific diseases through exhaled breath analysis is: the exhaled gas of the human body is through the blood circulation...

AI Technical Summary

Problems solved by technology

[0004] In order to improve the deficiencies of low efficiency and poor stability of manual classification existing in the prior art, an exhaled gas detection device is provided, which uses automatic classification of the device to improve efficiency and stability

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