Use of the Napoleon to Improve Polyp Measurement in Gastroenterology Fellows
Public ClinicalTrials.gov record NCT04858477. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This is a clinical trial assessing gastroenterology fellows' accuracy of colonic polyp measurement using a Micro-Tech Endoscopic Polyp Measurement Device named Napoleon. The study will evaluate the feasibility of Napoleon as a polyp measurement device. Investigators will collect data on inpatient and outpatient colonoscopies performed by fellows at NYU Langone Health, NYU Langone Hospital Brooklyn, Bellevue Hospital Center, and Manhattan VA Medical Center from May 2021 - May 2022 for 150 patients. Investigators will include all colonoscopies with polyps done in adults age 45 and above. For each colonoscopy, a fellow will first visually estimate the polyp size and then measure the polyp with Napoleon. Investigators will calculate the difference in polyp measurement between visual assessment and using Napoleon for each fellow year and compare differences among fellow years. Investigators will evaluate for changes in fellows' accuracy of polyp measurement with subsequent uses of Napoleon. Investigators will determine the proportion of cases with a change in the recommended surveillance interval based on polyp size. A survey will be given to all fellows to assess the level of ease with using Napoleon.
Study identification
- NCT ID
- NCT04858477
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Early Phase 1
- Enrollment
- 46 participants
Conditions and interventions
Conditions
Interventions
Other · Device
Eligibility (public fields only)
- Age range
- 45 Years and older
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jun 13, 2021
- Primary completion
- Sep 25, 2023
- Completion
- Sep 25, 2023
- Last update posted
- Feb 24, 2026
2021 – 2023
United States locations
- U.S. sites
- 4
- U.S. states
- 1
- U.S. cities
- 2
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| NYU Langone Hospital Brooklyn | Brooklyn | New York | 11220 | — |
| Bellevue Hospital Center | New York | New York | 10016 | — |
| Manhattan VA Medical Center | New York | New York | 10016 | — |
| NYU Langone Health | New York | New York | 10016 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04858477, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Feb 24, 2026 · Synced Sep 5, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04858477 live on ClinicalTrials.gov.