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Stomach acid test

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Stomach acid test

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Stomach acid test

Definition:

The stomach acid test is a test that assesses the quantity and acidity of stomach contents.

Alternative Names:
Gastric acid secretion test

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How the test is performed:

After a period of fasting, gastric residue is all that remains in the stomach. This fluid can be removed via a tube inserted through the esophagus.

To test the capacity of the parietal cells in the stomach to secrete acid, gastrin may be injected subcutaneously (just under the skin), intramuscularly, or intravenously. The stomach contents are then removed and analyzed.

Another test involves insulin-induced hypoglycemia. Enough insulin is given subcutaneously or intravenously to cause the blood sugar to decrease, which causes the vagus nerve to stimulate the release of gastrin. After a short time, the stomach contents are removed and analyzed.

How to prepare for the test:

You will be asked to consume no food or liquid for four to six hours before the test.

For infants and children:

The preparation you can provide for this test depends on your child's age and experience. For specific information regarding how you can prepare your child, see the following topics:

• Infant test or procedure preparation (birth to 1 year)
• Toddler test or procedure preparation (1 to 3 years)
• Preschooler test or procedure preparation (3 to 6 years)
• Schoolage test or procedure preparation (6 to 12 years)
• Adolescent test or procedure preparation (12 to 18 years)

How the test will feel:

You may notice some discomfort and/or a gagging sensation as the tube is passed through your nose or mouth and down your esophagus.

Why the test is performed:

This test may be used for a number of reasons:

• To test for the cause of ulcers
• To detect duodenal regurgitation
• To evaluate the cause of malabsorption
• To assess the adequacy of anti-ulcer medications
• To evaluate secretion of gastrin

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