You likely will be given medicine to help you relax.
During EUS your doctor passes a thin, flexible tube (endoscope) through your mouth and through your digestive tract. A small ultrasound device (transducer) in the tube produces sound waves that create a precise image of surrounding tissue, including lymph nodes in the chest. The endoscope is then gradually withdrawn.
If you have fine-needle aspiration with EUS, your doctor may need to pass a second, curved device through a channel in the endoscope into your digestive tract. That device can guide a very slender needle to your lymph nodes and tumors or other abnormalities. The needle extracts fluid and tissue for analysis.
EUS with fine-needle aspiration generally lasts less than an hour.
July 01, 2017
- Longo DL, et al., eds. Gastrointestinal endoscopy. In: Harrison's Principles of Internal Medicine. 19th ed. New York, N.Y.: McGraw-Hill Education; 2015. http://accessmedicine.com. Accessed March 5, 2017.
- Understanding EUS (Endoscopic ultrasound). American Society of Gastrointestinal Endoscopy. https://www.asge.org/home/for-patients/patient-information/understanding-eus. March 5, 2017.
- Greenberger NJ, et al., eds. Endoscopic ultrasound. In: Current Diagnosis & Treatment: Gastroenterology, Hepatology & Endoscopy. 3rd ed. New York, N.Y.: The McGraw-Hill Companies; 2015. http://accessmedicine.mhmedical.com/content.aspx?bookid=1621§ionid=10518592. Accessed March 10, 2017.
- Wiersema MJ, et al. Endoscopic ultrasound-guided fine-needle aspiration biopsy in the gastrointestinal tract. http://www.uptodate.com/home. Accessed March 5, 2017.
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- Riggin EA. Allscripts EPSi. Mayo Clinic, Rochester, Minn. January 9, 2017.