It is estimated that up to 20% of patients who have Roux-en-Y Gastric Bypass (RYGB) surgery will not meet their weight loss goal, or may even regain some of the weight they initially lost. One possible explanation is that the opening between the stomach pouch and the intestine becomes stretched. If this opening becomes too wide, food may be able to pass from the stomach to the intestine too quickly – causing patients to feel less full after eating.For some patients, doctors may recommend additional invasive surgery to tighten the opening between the stomach pouch and the small intestine. Although this may help patients resume their weight loss, the risk of complications during a second surgical procedure is significantly higher than the risk during the original gastric bypass.The purpose of this study is to evaluate an incisionless procedure for patients who have either had inadequate weight loss or have regained weight following gastric bypass. The procedure is designed to tighten the opening between the stomach pouch and the small intestine, which may slow down the passage of food to help patients feel full longer after eating.

Official Title

Randomized Evaluation of Endoscopic Suturing Transorally for Anastomotic Outlet Reduction (RESTORe) for Patients With Inadequate Weight Loss Following Roux-en-Y Gastric Bypass Surgery.


  •  Obesity

Study Type


Study Design

Treatment, Randomised, Double Blind (Subject, Outcomes Assessor), Active Control, Parallel Assignment, Efficacy Study.

Further Details

Primary Outcome Measures:

  • Weight Loss
    [Time Frame: 6 months]

Secondary Outcome Measures:

  • Excess Weight Lost (EWL)
    [Time Frame: 6 months]
  • Weight Stabilization
    [Time Frame: 6 months]
  • Improvement in Comorbidities and Quality of Life Parameters
    [Time Frame: 6 months]

Study Start

November 2006

Eligibility & Criteria

  • Ages Eligible for Study: 18 years and older
  • Genders Eligible for Study: Both
  • Accepts Healthy Volunteers: No

Inclusion Criteria:

  • 6 months post primary RYGB with inadequate weight loss or weight regain
  • BMI > 30 and ≤ 50
  • Dilated gastrojejunal anastomosis
  • Successfully completes screening process
  • Signed consent

Exclusion Criteria:

  • Recently quit smoking or plan to quit within the next year
  • Pregnant or planning to become pregnant over the course of the next 9 months
  • Mallampati score of 4
  • Serious systemic disease or active disease of the gastrointestinal tract
  • Gastric pouch abnormalities
  • Significant movement limitations
  • Use of weight-promoting or weight-reduction drugs during study period
  • Severe eating disorders
  • Uncontrolled depression or psychoses
  • Ongoing severe complication resulting from initial RYGB or other condition that in the investigators’ assessment would make the patient an unsuitable candidate for the study procedure
  • History of significant cardiovascular, cerebrovascular or pulmonary disease
  • Not a candidate for conscious or general sedation
  • Anticoagulant therapies
  • Active substance abuse
  • Life expectancy < 1 year
  • Enrolled in another investigational drug or device trial that has not completed the primary endpoint or that clinically interferes with this trial’s study endpoints.

Total Enrolment


Contact Details

Denver, Colorado
United States

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