Smear of duodenal fluid aspirate is an exam of fluid from the
Duodenal aspirated fluid smear
How the Test is Performed
A sample is taken during a procedure called an
How to Prepare for the Test
Do not eat or drink anything for 12 hours before the test.
How the Test will Feel
You may feel like you have to gag as the tube is passed, but the procedure is most often not painful. You can get medicines to help you relax and be free of pain. If you get anesthesia, you cannot drive for the rest of the day.
Why the Test is Performed
The test is done to look for infection of the small bowel. However, it is not often needed. In most cases, this test is only done when a diagnosis cannot be made with other tests.
There should be no disease-causing organisms in the duodenum. Normal value ranges may vary slightly among different laboratories. Talk to your provider about the meaning of your specific test results.
What Abnormal Results Mean
The results may show the presence of giardia protozoa, the intestinal parasite strongyloides, or another infectious organism.
The risks of this test include:
- Perforation of (poking a hole in) the gastrointestinal tract by the scope
Some people may not be able to have this test because of other medical conditions.
Other tests that are less invasive can often find the source of the infection.
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Diemert DJ. Nematode infections. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 26th ed. Philadelphia, PA: Elsevier; 2020:chap 335.
Mathisson BA, Pritt BS. Medical parasitology. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24th ed. Philadelphia, PA: Elsevier; 2022:chap 65.
Mathison BA, Pritt BS. Parasitology. In: Rifai N, Chiu RWK, Young I, Burnham CAD, Wittwer CT, eds. Tietz Textbook of Laboratory Medicine. 7th ed. St Louis, MO: Elsevier; 2023:chap 88.
Siddiqi HA, Rabinowitz S, Axiotis CA. Laboratory diagnosis of gastrointestinal and pancreatic disorders. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24th ed. Philadelphia, PA : Elsevier; 2022:chap 23.
Review Date: 06/05/2022
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