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Gut bacteria may predict surgery complications

NCT ID NCT07416760

Knowledge-focused Sponsor: Instituto de Investigación Sanitaria de la Fundación Jiménez Díaz 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looks at gut bacteria in 30 patients who had colorectal surgery. Researchers want to see if certain bacteria are linked to a higher risk of leakage where the intestine was reconnected. Participants provide stool samples before and after surgery. The goal is to understand how the microbiome changes and whether it can predict complications.

What this could mean

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

What this could lead to
If successful, this could help identify gut bacteria patterns that predict complications after colorectal surgery, potentially guiding future preventive strategies.
What could go wrong
This is a small observational study (30 people) that only looks for associations, not treatments. It may not find clear patterns or lead to direct clinical changes.

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.

Participants

About 30 people

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

Started

Feb 2026

Expected to finish

Dec 2026

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.

Who is studied

Patients will be selected by the clinical members of the research team from within the population in our setting who will undergo abdominal surgery involving colorectal intestinal anastomosis. To identify patients, the Surgery Department will analyze those who meet the inclusion and exclusion criteria designed for this project during the daily morning clinical session, and patients will then be offered the opportunity to accept/decline participation.

Ages

18 years and older

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: * Patients who have undergone colorectal intestinal anastomosis. * Signing of the informed consent form. * Age ≥18 years with good functional status. * Availability for postoperative follow-up. Exclusion Criteria: * Emergency surgery. * Intra-abdominal sepsis or previous dehiscence. * Severe immunosuppression. * Use of antibiotics in the 3 months prior to preoperative preparation. * Pregnancy or breastfeeding.

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As listed by the trial registrant

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

Abdominal surgery

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

  • University Hospital Fundación Jiménez Díaz

    RECRUITING

    Madrid, 28040, Spain

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