A duodenal tissue smear is performed by inserting an endoscope through the mouth down into the duodenum. When the tube is in place, it suctions out some of the fluid located in the duodenum. When the procedure is over the tube is removed. The sample is sent to the laboratory for testing. The test is performed to diagnose infection or parasitic infestation of the small bowel.
Review Date 5/11/2016
Updated by: Subodh K. Lal, MD, gastroenterologist with Gastrointestinal Specialists of Georgia, Austell, GA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.