Johns Hopkins Manual for GI Endoscopic Nurses, Third Edition

Mouen Khashab, MD; Toshunia Robinson, MD; Anthony Kalloo, MD

Chapter 22: Endoscopic Ultrasonography (continued)

Anne Marie Lennon, MD

Endoscopic ultrasonography (EUS) uses high-frequency sound waves to image internal structures. Differing reflection signals are produced when sound waves are projected into the body and reflected, generating an image. The EUS scope can visualize structures within 5 cm of the ultrasound probe. This includes the esophagus, mediastinum, heart, left lobe of the liver, stomach, pancreas, left adrenal gland, left kidney, and duodenum. The EUS scope can also be inserted through the rectum and can be used to assess lesions in the rectum and left colon. EUS can be used as a diagnostic or therapeutic…
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