Development of new gastric endoscopic submucosal dissection training model: A reproducibility evaluation study

Area of Science:

• Gastroenterology
• Medical Education
• Surgical Simulation

Background:

• Gastric endoscopic submucosal dissection (ESD) is technically challenging due to stomach anatomy and lesion variability.
• Developing effective training models is crucial for improving procedural proficiency.

Purpose of the Study:

• To introduce and evaluate a novel gastric ESD training model (G-Master).
• To assess the reproducibility of simulated gastric lesion locations within the G-Master model.

Main Methods:

• The G-Master model uses a konjac flour-based membrane and a setting frame to simulate 11 gastric locations.
• Reproducibility was assessed via procedure speed analysis and expert questionnaire scoring (six-point scale for location similarity).

Main Results:

• The G-Master model achieved high mean similarity scores (>4) across most simulated gastric locations.
• Lower anterior and posterior walls received moderate scores (3-4), indicating areas for potential refinement.
• Procedure times were longer in the upper/middle greater curvature, reflecting known ESD difficulty in these regions.

Conclusions:

• The G-Master training model demonstrates significant reproducibility for various gastric locations.
• This model offers a valuable tool for training physicians in performing gastric ESD at diverse anatomical sites.