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Rigshospitalet - a part of Copenhagen University Hospital

Using computerized assessment in simulated colonoscopy: a validation study

Research output: Contribution to journalJournal articleResearchpeer-review


  1. Endoscopic electrochemotherapy for esophageal cancer: a phase I clinical study

    Research output: Contribution to journalJournal articleResearchpeer-review

  2. Automatic and unbiased assessment of competence in colonoscopy: exploring validity of the Colonoscopy Progression Score (CoPS)

    Research output: Contribution to journalJournal articleResearchpeer-review

  • Andreas Slot Vilmann
  • Christian Lachenmeier
  • Morten Bo Søndergaard Svendsen
  • Bo Søndergaard
  • Yoon Soo Park
  • Lars Bo Svendsen
  • Lars Konge
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Background and study aims  Patient safety during a colonoscopy highly depends on endoscopist competence. Endoscopic societies have been calling for an objective and regular assessment of the endoscopists, but existing assessment tools are time-consuming and prone to bias. We aimed to develop and gather evidence of validity for a computerized assessment tool delivering automatic and unbiased assessment of colonoscopy based on 3 dimensional coordinates from the colonoscope. Methods  Twenty-four participants were recruited and divided into two groups based on experience: 12 experienced and 12 novices. Participants performed twice on a physical phantom model with a standardized alpha loop in the sigmoid colon. Data was gathered directly from the Olympus ScopeGuide system providing XYZ-coordinates along the length of the colonoscope. Five different motor skill measures were developed based on the data, named: Travel Length, Tip Progression, Chase Efficiency, Shaft movement without tip progression, and Looping. Results  The experinced had a lower travel length ( P  < 0.001), tip progression ( P  < 0.001), chase efficiency ( P  = 0.001) and looping ( P  = 0.006), and a higher shaft movement without tip progression ( P  < 0.001) reaching the cecum compared with the novices. A composite score was developed based on the five measurements to create a combined score of progression, the 3D-Colonoscopy-Progression-Score (3D-CoPS). The 3D-CoPS revealed a significant difference between groups (experienced: 0.495 (SD 0.303) and novices -0.454 (SD 0.707), P  < 0.001). Conclusion  This study presents a novel, real-time computerized assessment tool for colonoscopy, and strong evidence of validity was gathered in a simulation-based setting. The system shows promising opportunities for automatic, unbiased and continuous assessment of colonoscopy performance.

Original languageEnglish
JournalEndoscopy International Open
Issue number6
Pages (from-to)E783-E791
Publication statusPublished - Jun 2020

ID: 59983801