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Which Weight-Loss surgery steadies blood sugar best?

NCT ID NCT07872397

Disease control Sponsor: Hospitales Universitarios Virgen del Rocío Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Oct 13, 2026 · Last updated Oct 14, 2026 · Updated 1 time

Summary

Researchers compare two bariatric surgeries, Single Anastomosis Sleeve Ileal Bypass (SASI) and Roux-en-Y Gastric Bypass (RYGB), in adults with morbid obesity. Participants wear a continuous glucose monitor for 7 days before surgery and again 6 and 12 months after. The study measures how much blood sugar fluctuates, along with weight loss, diabetes-related conditions, complications, reflux, nutritional levels, and quality of life.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Bariatric surgery: Single Anastomosis Sleeve Ileal Bypass (SASI) or Roux-en-Y Gastric Bypass (RYGB)
What this could lead to
If one procedure smooths blood sugar swings better, doctors could tailor weight-loss surgery to people who also struggle with unstable glucose.
What could go wrong
This is a small, single-center study of 68 people, so the results may not apply broadly. Both surgeries carry risks of complications, nutritional deficiencies, and reflux, and glucose monitoring over 7 days may miss longer-term patterns.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 68 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jul 2026

Expected to finish

Jul 2028

An estimate. End dates often move.

Lead sponsor

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.

Ages

18 to 74 years

Sex

Anyone

Healthy volunteers

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

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age 18 years or older and younger than 75 years. * Morbid obesity with body mass index (BMI) between 35 and 55 kg/m². * Pre-anesthetic assessment classified as ASA I-III. * Signed informed consent. Exclusion Criteria: * Body mass index (BMI) \>55 kg/m². * Previous major gastrointestinal surgery. * Diseases that alter interstitial fluid volume and may affect glucose measurement accuracy, including severe acute or chronic renal failure, heart failure, or liver failure. * Pathological gastroesophageal reflux disease with endoscopic involvement. * Pre-anesthetic assessment not suitable for surgery or ASA IV. * Pregnancy. * Alcohol addiction. * Active malignancy. * Refusal to sign informed consent. * Inability to comply with study instructions.'

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Conditions

The condition(s) this trial relates to.

morbid obesity

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Obesity, morbid

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Hospital Universitario Virgen del Rocío

    RECRUITING

    Seville, Sevilla, 41013, Spain

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