for people ages 25 years and up (full criteria)
at San Francisco, California
study started
estimated completion
Principal Investigator
Tonya Kaltenbach
Photo of Tonya Kaltenbach
Tonya Kaltenbach



I plan to investigate the value of video-based feedback in endoscopic training - specifically, the role of terminal video feedback as compared to usual concurrent feedback on cold snare polypectomy technique in trainees, using Direct Observation of Polypectomy Skills (DOPyS) competency score. I have focused the study on the competency of cold snare polypectomy for subcentimeter polyps. The majority (>75%) of colon polyps are smaller than one centimeter. Cold snare polypectomy has been shown, and recommended by the American Society for Gastrointestinal Endoscopy (ASGE), to be an effective removal technique. However, its widespread use and moreover, its teaching to trainees is lacking. It takes time and resources to learn and teach endoscopic techniques. Our study will hope to identify a mechanism through video-based feedback that could help to improve the translation of the training of polypectomy skills to its actual performance, and to accelerate the learning curve.

Official Title

Training for COMPLETE Polyp Resection During Colonoscopy -Improving Competency and Metrics for PoLypectomy Skills Using Evaluation Tools and VidEo Feedback


Colorectal Cancer Colorectal Neoplasms Video-based terminal feedback


You can join if…

Open to people ages 25 years and up

  • Participants: Senior level UCSF gastroenterology trainees (2nd and 3rd year GI fellows) rotating at the San Francisco Veterans Affairs Medical Center (SFVAMC).
  • Patients undergoing elective routine colonoscopy procedure.

You CAN'T join if...

  • Participants: Junior level University of California, San Francisco (UCSF) gastroenterology trainees (1st year GI fellows) rotating at the San Francisco Veterans Affairs Medical Center, and senior level trainees who are not rotating at the SFVAMC.
  • Patients: Patients undergoing undergoing emergency colonoscopy procedure.


  • San Francisco VA Medical Center
    San Francisco California 94121 United States

Lead Scientist at UCSF

  • Tonya Kaltenbach
    Dr. Tonya Kaltenbach is an associate professor of Clinical Medicine at UC San Francisco (UCSF) and the director of Advanced Endoscopy at the San Francisco VA Medical Center. She has served on the US Multi-Society Task Force on Colorectal Cancer and led the guideline development for the endoscopic removal of colorectal lesions.


accepting new patients by invitation only
Start Date
Completion Date
San Francisco Veterans Affairs Medical Center
Study Type
Last Updated