Method of exhaled gas measurement and analysis and apparatus therefor

摘要

The exhalation collected in a breath bag capable of expansion and contraction as much as given volume (Va) is sucked into gas inlet vessel (21). Subsequently, the gas inlet vessel (21) is communicated by means of valve (V2) with cell (11) having been maintained at atmospheric pressure by pre-filling with a sample gas or reference gas. After the communication, the gas pressure is measured by pressure sensor (16) fitted to the cell (11). Whether the exhalation collected in the breath bag is below given amount can be accurately judged.