A patient who has symptoms of peptic ulcer disease will undergo a test that requires drinking a liquid containing 13C urea and breathing into a container. The nurse will explain to the patient that this test is performed to
a. assess the level of hydrochloric acid.
b. detect H. pylori antibodies.
c. measure the pH of gastric secretions.
d. test for the presence of 13CO2.
ANS: D
When H. pylori is suspected, a noninvasive test is performed by administering 13C urea which, in the presence of H. pylori, will release 13CO2. The test does not measure the amount of HCl acid or the pH and does not detect H. pylori antibodies.
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