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breath tests |
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breath tests, diagnostic tests for intestinal disorders such as bacterial overgrowth, ileal disease, lactase deficiency, and steatorrhea. Lactose malabsorption is treated by giving the patient 12.5 to 25.0 grams of lactose and measuring the amount of hydrogen excreted in the breath. If lactose absorption is impaired in the small intestine, colonic bacteria ferment the lactose, releasing hydrogen, which is excreted in the breath. Bacterial overgrowth is tested with 14C-cholylglycine, which is normally absorbed by the ileum and recycled via the enterohepatic circulation. In cases of bacterial overgrowth the labeled glycine is removed by conjugation in the small intestine, absorbed, and metabolized, resulting in an increase of 14CO2 in the breath. Breath tests are also used to test for the presence of Helicobacter pylori. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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As the neoprohibitionists push ahead with plans to mandate smaller beer cups and ignition interlock devices that would require all drivers to submit to breath tests every time they start their cars, that history is more relevant than ever. In a preliminary discussion of that idea in December, board members said many district parents had questioned why the district would subject all students to the breath tests, rather than just those behaving suspiciously. During holiday weekends in September 2002 and May 2003, researchers from the Havasu Regional Medical Center, the Centers for Disease Control and Prevention, and other cooperating organizations sampled air along the boat-choked channel and conducted breath tests among vacationers and workers in the vicinity. |
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