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Patients swallow urea labelled with an uncommon isotope, either radioactive carbon-14 (nowadays preferred in many countries) or non-radioactive carbon-13.In the subsequent 10–30 minutes, the detection of isotope-labelled carbon dioxide in exhaled breath indicates that the urea was split; this indicates that urease (the enzyme that H. pylori uses to metabolize urea to produce ammonia) is ...
In the initial variant of the urea breath test, a diagnostic test for Helicobacter pylori, urea labeled with about 37 kBq (1.0 μCi) 14 C is fed to a patient (i.e. 37,000 decays per second). In the event of a H. pylori infection, the bacterial urease enzyme breaks down the urea into ammonia and radioactively-labeled carbon dioxide , which can ...
The presence of Helicobacter pylori (in peptic ulcer disease) can be tested for with the urea breath test. Exhaled nitric oxide is a breath test that might signal airway inflammation such as in asthma. Breath tests for diseases have been developed for early detection of lung cancer, breast cancer, pulmonary tuberculosis and many others, to ...
In medicine, tracers are applied in a number of tests, such as 99m Tc in autoradiography and nuclear medicine, including single-photon emission computed tomography (SPECT), positron emission tomography (PET) and scintigraphy. The urea breath test for helicobacter pylori commonly used a dose of 14 C labeled urea to detect h. pylori infection. If ...
Urea labeled with carbon-14 or carbon-13 is used in the urea breath test, which is used to detect the presence of the bacterium Helicobacter pylori (H. pylori) in the stomach and duodenum of humans, associated with peptic ulcers. The test detects the characteristic enzyme urease, produced by H. pylori, by a reaction that produces ammonia from ...
urea breath test: UC: ulcerative colitis uterine contraction: UCHD: usual childhood diseases (see list of childhood diseases) UCTD: Undifferentiated connective tissue disease: UCx: Urine culture: UD: as directed (from Latin ut dictum) UDS: urine drug screening Undifferentiated sarcoma: UDT: urine drug test undescended testis: UE: upper ...
Breath aerosol analysis consists in the sampling and analysis of particles emitted in the respiratory tract and present in exhaled breath. [12] This is a relatively new field that holds great promise for direct diagnostics of pathogens, such as Influenza , and for in-vivo monitoring of the respiratory lining fluid ( Respiratory epithelium ...
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related to: urea breath test fact sheet