Research progress of exhaled breath volatile organic compounds in diagnosis of diseases

Breath analysis is a rapidly growing field recently, its noninvasiveness and low-cost make it great potential in screen and diagnosis of diseases.More and more studies have shown that the kinds and concentrations of volatile organic compounds (VOCs) can reflect the types and severity degree of diseases, including alkanes, alcohols, aldehydes, ketones and other common VOCs.Among different breath analysis, there is no unified standard on the collection and analysis of exhaled VOCs, and it may be affected by various factors.This review summarizes the progress and practical application of exhaled VOCs, hoping to bring insight for related studies afterwards. Key words: Breath analysis; Volatile organic compounds; Diagnosis