Improved model for teaching interventional EUS

Gastrointest Endosc. 2000 Sep;52(3):400-3. doi: 10.1067/mge.2000.108408.


Background: A swine model was previously developed for teaching endoscopic ultrasound (EUS). The purpose of this study was to improve this model and develop a method for creating focal lesions for EUS imaging and intervention.

Methods: Experiments were performed in farm pigs (Sus scrofa) under general anesthesia. Under real-time EUS guidance attempts were made to create a submucosal lesion and a focal mediastinal lesion, to perform EUS-guided fine-needle aspiration of the pancreas, and to confirm the site of injection during "sham" EUS-guided celiac block.

Results: A hypoechoic, submucosal mass was created in the stomach, which was then imaged by EUS and punctured trans-gastrically. Injection of saline solution in the mediastinum created a pseudo-mediastinal lymph node. A needle was then advanced trans-esophageally into the mediastinum to mimic EUS-guided fine-needle aspiration of a mediastinal lymph node. Abdominal exploration of the pigs after euthanasia confirmed injection of the sham celiac block around the celiac ganglion.

Conclusion: The swine model is not only useful for teaching normal EUS anatomy, but it may be a useful model for teaching EUS-guided intervention.

Publication types

  • Comparative Study

MeSH terms

  • Animals
  • Biopsy, Needle / methods
  • Education, Medical / methods
  • Endoscopy, Digestive System / methods*
  • Endosonography*
  • Gastric Mucosa / cytology
  • Gastric Mucosa / diagnostic imaging
  • Gastroenterology / education*
  • Lymph Nodes / cytology
  • Lymph Nodes / diagnostic imaging
  • Mediastinum / diagnostic imaging
  • Pancreas / cytology
  • Pancreas / diagnostic imaging
  • Reproducibility of Results
  • Swine
  • Teaching / methods*