| 摘要 |
<p>The film of fluid lining the lungs and respiratory passages (alveolar fluid or bronchial secretion, spittle) contains volatile and non-volatile metabolic products and mediators some of which are of considerable diagnostic value. Primary non-volatile substances in aerosol form can enter the exhaled air. The determination of these substances in human exhaled air can be used, possibly together with volatile substances, to diagnose diseases.</p> |
