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Related Experiment Videos

A simple phantom for learning EUS-guided FNA.

Darius Sorbi1, Enrique Vazquez-Sequeiros, Maurits J Wiersema

  • 1Mayo Clinic Scottsdale, Scottsdale, Arizona 85259, USA.

Gastrointestinal Endoscopy
|April 1, 2003
PubMed
Summary
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A low-cost endoscopic ultrasound (EUS) phantom was developed using common materials to simulate EUS-guided fine-needle aspiration (EUS-FNA) lesions. This accessible training tool effectively mimics EUS imaging and allows practice of EUS-FNA techniques.

Area of Science:

  • Medical Education
  • Gastroenterology
  • Medical Simulation

Background:

  • Endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA) presents a steep learning curve for practitioners.
  • Developing accessible training models is crucial for mastering EUS-FNA techniques.
  • This study evaluated the feasibility of a low-cost phantom for EUS-FNA practice.

Purpose of the Study:

  • To assess the feasibility of creating and utilizing a low-cost phantom for practicing EUS-FNA.
  • To determine if the phantom can effectively simulate EUS-FNA scenarios.
  • To evaluate the potential of this phantom as an educational tool.

Main Methods:

  • A phantom was constructed using a barium enema bag, agar, and various food items (carrots, macaroni, peas) and surgical glove fingertips filled with saline to simulate lesions.

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  • Acoustic coupling was achieved by immersing the phantom in water.
  • A water jet system provided simulated vascular flow, and a linear array echoendoscope with a fine needle was used for simulated EUS-FNA procedures.

    • Main Results:

    • The phantom was inexpensive to produce (under $50) and reusable for up to 4 months with refrigeration.
    • EUS images generated by the phantom exhibited echotexture comparable to liver tissue.
    • The phantom successfully simulated solid and cystic lesions, enabling targeted aspiration and sampling under EUS guidance, with Doppler flow visualization.

    Conclusions:

    • A cost-effective EUS phantom made from readily available materials can be a valuable educational resource for EUS-FNA training.
    • Further research is required to validate its impact on skill acquisition in gastroenterologists with varying levels of EUS experience.