The aim of the study is to record and analyze endoscopist and endoscope motions to identify key movements in flexible endoscopy.

The increasing development of interventional digestive endoscopy raises the challenge to teach and learn complex endoscopic procedures. Nowadays experts are facing the challenge of explaining precisely an elaborate choreography of movements performed during the procedure, while novices are confronted with a broad range of hand, wrist and shoulder movements each resulting in different endoscope responses. The teaching strategy of endoscopy could benefit from a dedicated motion library that would associate the endoscopist's motion and the consequent endoscope response. A simplified endoscopic language made of individual motions could greatly shorten the learning curve.

The aim of the study is to record and analyze endoscopist and endoscope motions to identify key movements in flexible endoscopy.

Inclusion Criteria:

• Patient over 18 years old
• Patient who are scheduled for a gastroscopy procedure under sedation
• Patient able to understand the study and provide written informed consent
• Patient affiliated to the French social security system.

Exclusion Criteria:

• Patient with an altered upper GI anatomy due to previous surgery
• Patient with a known anomaly of the upper GI anatomy
• Patient carrying an implantable medical device (pacemaker…)
• Patient with a condition preventing its participation to study procedures, according to investigator's judgment
• Pregnancy or breastfeeding
• Patient in custody
• Patient under guardianship