Objective Differences in Colonoscopy Technique Between Trainee and Expert Endoscopists Using the Colonoscopy Force Monitor

Alexander R. Ende, Piet De Groen, Bryan L. Balmadrid, Joo Ha Hwang, John Inadomi, Tomasz Wojtera, Vladimir Egorov, Noune Sarvazyan, Louis Korman

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Background: Learning to perform colonoscopy safely and effectively is central to gastroenterology fellowship programs. The application of force to the colonoscope is an important part of colonoscopy technique. Aims: We compared force application during colonoscopy between novice and expert endoscopists using a novel device to determine differences in colonoscopy technique. Methods: This is an observational cohort study designed to compare force application during colonoscopy between novice and experienced trainees, made up of gastroenterology fellows from two training programs, and expert endoscopists from both academic and private practice settings. Results: Force recordings were obtained for 257 colonoscopies by 37 endoscopists, 21 of whom were trainees. Experts used higher average forward forces during insertion compared to all trainees and significantly less clockwise torque compared to novice trainees. Conclusions: We present significant, objective differences in colonoscopy technique between novice trainees, experienced trainees, and expert endoscopists. These findings suggest that the colonoscopy force monitor is an objective tool for measuring proficiency in colonoscopy. Furthermore, the device may be used as a teaching tool in training and continued medical education programs.

Original languageEnglish (US)
Pages (from-to)46-52
Number of pages7
JournalDigestive Diseases and Sciences
Issue number1
StatePublished - Jan 1 2018

Bibliographical note

Funding Information:
Acknowledgments Research reported in this publication was supported by the National Institute of Diabetes and Digestive and Kidney Diseases of the National Institutes of Health under Award Number R44DK068936. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health.

Publisher Copyright:
© 2017, Springer Science+Business Media, LLC, part of Springer Nature.


  • Colonoscopy
  • Education
  • Force
  • Quality
  • Training


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