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Gut bugs may decide if your new knee lasts

NCT ID NCT06951477

Knowledge-focused Sponsor: London Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph's Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 26, 2026

Summary

This study looks at whether the bacteria in your gut (the gut microbiome) is different in people whose knee replacements fail versus those whose knees work well. Researchers will compare gut bacteria in 30 patients needing repeat knee surgery to those with successful implants. They hope to understand if gut health plays a role in infection, loosening, or pain after knee replacement.

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 point toward ways to predict or prevent knee replacement failure by targeting the gut microbiome.
What could go wrong
This is a small, early observational study with only 30 participants, so results may not apply to everyone. It looks for patterns, not a treatment.

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.

Expected to start

Oct 2025

An estimate. Start dates often move.

Expected to finish

Dec 2027

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 at University Hospital scheduled to undergo a revision TKA.

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

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: * Scheduled to undergo a revision TKA * Willing and able to comply with follow-up requirements * Ability to provide informed consent * Ability to read, write, and speak English Exclusion Criteria: * Pregnancy * Less than 3 months post-operation from primary surgery * Diagnosis of periprosthetic fracture * Scheduled for DAIR (debridement, antibiotics, and implant retention) revision surgery * Scheduled for stage 2 PJI revision

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Conditions

The condition(s) this trial relates to.

Inflammation osteoarthritis, knee

As listed by the trial registrant

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

Osteoarthritis, knee Revision total knee arthroplasty

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

    London, Ontario, N6A5A5, Canada

More trials for these conditions

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