BACKGROUND Current breath tests for measurement of gastric emptying of solids are expensive, possibly inaccurate, and require cumbersome calculations. AIMS We wished to validate a simplified solid gastric emptying test using a [(13)C]Spirulina platensis breath test for accurate results relative to scintigraphy. SUBJECTS Thirty healthy volunteers. METHODS We measured gastric emptying of eg...

We sought biomarkers of breast cancer in the breath because the disease is accompanied by increased oxidative stress and induction of cytochrome P450 enzymes, both of which generate volatile organic compounds (VOCs) that are excreted in breath. We analyzed breath VOCs in 54 women with biopsy-proven breast cancer and 204 cancer-free controls, using gas chromatography/mass spectroscopy. Chromatog...

OBJECTIVES Analyze a set of data of hydrogen breath tests by use of data mining tools. Identify new patterns of H2 production. METHODS Hydrogen breath tests data sets as well as k-means clustering as the data mining technique to a dataset of 2571 patients. RESULTS Six different patterns have been extracted upon analysis of the hydrogen breath test data. We have also shown the relevance of e...

Background—Current breath tests for measurement of gastric emptying of solids are expensive, possibly inaccurate, and require cumbersome calculations. Aims—We wished to validate a simplified solid gastric emptying test using a [C]Spirulina platensis breath test for accurate results relative to scintigraphy. Subjects—Thirty healthy volunteers. Methods—We measured gastric emptying of egg containi...

Orocecal transit time (OCTT) is one of the main determinant of the hunger ratings and gastrointestinal sensitivity. While marked-isotopes scintigraphy is the gold standard in its determination in the clinical frame, breath tests are cheap, well-tolerated and non-invasive alternatives. In fact C-13 and C-14 stable isotopes breath tests can be used to assess gastric emptying and OCTT in the clini...

To examine the applicability of the Alcotest 7410 machine for preliminary testing of breath alcohol systematic investigations were performed. After the end of drinking alcohol blood samples were taken in series from one person and parallel breath tests were carried out. Under the conditions used for the blood sampling by the police breath tests were carried out on 168 subjects 1-5 mins after th...

BACKGROUND Lactase deficiency is a common condition responsible for various abdominal symptoms. Lactose hydrogen breath test is currently the gold standard in diagnosing lactose intolerance. AIM To assess sensitivity and specificity of symptoms developed after oral lactose challenge. METHODS Intensity of nausea, abdominal pain, borborygmi, bloating and diarrhoea was recorded every 15 min up...

aim : to evaluate the diagnostic value of helicobacter pylori stool antigen test before and after eradication background : there are different methods for diagnosis and follow up of helicobacter pylori infection, including invasive methods done with endoscopy and non invasive ones such as ubt and urine analysis antibody. one of non invasive new methods is analysis of helicobacter pylori stool a...

background: chronic idiopathic urticaria is defined as urticaria, which lasts for more than 8 weeks and has no apparent etiology. the aim of this study was to examine the causal role of helicobacter pylori infection in chronic idiopathic urticaria.   methods: fifty-six patients with chronic idiopathic urticaria and a negative response to skin prick test for common aeroallergens were selected. t...