Gastric bypass reversal: what happens when the surgery is undone?
NCT ID NCT07347093
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks back at 199 adults in Sweden who had their Roux-en-Y gastric bypass reversed between 2007 and 2023. Researchers want to understand why the reversal was needed, whether symptoms got better, and how weight changed. The goal is to gather information to help doctors and patients make better decisions.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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199 people
The number who actually took part.
- Started
-
Nov 2025
- Expected to finish
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May 2026
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
National registry-based cohort
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Adult patients (≥ 18years) who underwent reversal of RYGB between 2007 and 2023. Exclusion Criteria: * Emergency reversal due to bowel ischemia * Reversal following other bariatric procedures (e.g. gastric banding) * Partial/functional reversals (e.g., gastro-gastric fistula or anastomosis between the Roux-limb and gastric remnant, without full reversal of RYGB)
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Vrinnevi Hospital
Norrköping, 60182, Sweden
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