Measuring the connection in gastric bypass patients

Feasibility of a New Method Named Napoleon to Measure Gastrojejunal Anastomosis in Gastric Bypass Patients With Weight Regain

Early Phase 1 Interventional NYU Langone Health · NCT04832282

This study is testing a new device to see if it can more accurately measure a specific part of the stomach in gastric bypass patients who have gained weight back.

Quick facts

PhaseEarly Phase 1
Study typeInterventional
Enrollment100 (estimated)
Ages18 Years to 90 Years
SexAll
SponsorNYU Langone Health Academic / other
Locations2 sites (Boston, Massachusetts and 1 other locations)
Trial IDNCT04832282 on ClinicalTrials.gov

What this trial studies

This clinical trial evaluates the feasibility of the Napoleon device for measuring the gastrojejunal anastomosis (GJA) in Roux-en-Y gastric bypass patients who have experienced weight regain. Participants will undergo endoscopy, during which endoscopists will visually estimate the GJA diameter and then measure it using the Napoleon device. The study aims to compare the accuracy of these two measurement methods and gather feedback from endoscopists regarding the ease of using the Napoleon device. The trial will involve up to 100 cases at two major hospitals.

Who should consider this trial

Good fit: Ideal candidates are adults aged 18-90 who have undergone Roux-en-Y gastric bypass and are experiencing weight regain, and are scheduled for an endoscopy.

Not a fit: Patients with a history of prior endoscopies that resulted in complications may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could improve the accuracy of measuring GJA, potentially leading to better management of weight regain in gastric bypass patients.

How similar studies have performed: While this approach is novel in the context of measuring GJA, similar studies assessing measurement devices in endoscopic procedures have shown promise.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

In order to be eligible to participate in this study, an individual must meet all of the following criteria:

1. RYGB patient with weight regain age 18-90
2. Scheduled for an endoscopy
3. Willingness and ability to provide informed consent

Exclusion Criteria:

An individual who meets any of the following criteria will be excluded from participation in this study:

1. History of prior endoscopies with complications

Where this trial is running

Boston, Massachusetts and 1 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Gastric BypassWeight Regain
Last reviewed 2026-06-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.