| 摘要 |
A method and apparatus for breath analysis from a test person who may be incapable of delivering controlled forced expiration. Breath sampling may be essentially contactless and is provided by active air intake to measuring cell (4) via receptor (2) which exhibits concentration preserving effect based on partial reflow which prevents mixing with ambient air. The analysis is performed by IR spectroscopy, including the determination of concentration of a volatile organic substance, e g ethyl alcohol, and a physiological reference substance, e g carbon dioxide. The timing of sampling is controlled by starting command from operator, and the duration of air intake is controlled by sensor signal from the measuring cell. The apparatus includes one hand unit (1), an exchangeable receptor (2), and a docking station (3). |
