Breath possesses unique advantages as a specimen for clinical chemical analyses, including the continuous equilibrium of gases and volatile substances between expired alveolar air and the pulmonary blood circulation. Substances amenable to analysis in breath include 02, C02, CO,and other gases, volatile organic compounds, and many drugs with sufficiently high vapor pressures at physiological te...

Gathering information about a subject's physiological and pathophysiological condition from the `smell' of breath is an idea that dates back to antiquity. This intriguing concept of non-invasive diagnosis has been revitalized by `exhaled breath analysis' in recent decades. A main driving force was the development of sensitive and versatile gas-chromatographic and mass-spectrometric instruments ...

Aim The aim was to investigate breath test outcomes in patients with suspected SIBO and indicative symptoms of SIBO, diagnosed by breath testing. Background Breath testing is used to detect small intestinal bacterial overgrowth (SIBO) by measuring hydrogen and methane produced by intestinal bacteria. Methods This retrospective cross sectional study included 311 patients with gastrointestina...

Breath alcohol concentration, breath temperature, and body temperature are used to extrapolate the breath alcohol concentration to the concentration of alcohol in the deep lung air, which is in equilibrium with the pulmonary blood. Introduction The variability that is seen in the breath alcohol test (note: “alcohol” means ethyl alcohol) has always been more or less ignored as inevitable “biolog...

back ground and amis: among the patients who go to physicians, especially to gastroentero logists, a great number consists of the onse suffering upper gi diseases, particularly peptic ulcer disease (pud) which,â  in addition to creating much pain and lowering the quality of life causes a great morbidity and â mortality. so it seems necessary to be cured.â according to the lastâ  researchesâ  th...