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850 knee patients tracked to uncover why MPFL surgery sometimes fails

NCT ID NCT06883396

Knowledge-focused Sponsor: Hospital for Special Surgery, New York 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study follows 850 people aged 10–35 who are having surgery for a kneecap that keeps dislocating. Researchers want to find out what factors increase the risk of the kneecap dislocating again after surgery. Participants will fill out surveys about their knee function and activity level one and two years after the operation.

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 850 people

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

Started

Jan 2023

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 presenting to the participating surgeons for treatment of recurrent patellar instability

Ages

10 to 35 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: * 10-35 years old * Recurrent patellar instability with at least one episode defined as either (1) a dislocated patella requiring reduction in the emergency department or (2) a convincing history for dislocation, associated with full giving way, and the following physical findings: (a) hemarthrosis or effusion, (b) tenderness along the medial retinaculum, and (c) apprehension when laterally directed force was applied to the patella or (3) MRI-documented dislocation with associated bone bruises Exclusion Criteria: * Previous ipsilateral knee surgery * Obligatory/fixed/habitual patella dislocation or subluxation * Unloadable inferior or lateral chondral damage on the patella that would require a tibial tubercle transfer for unloading purposes * Pathologic tibiofemoral instability

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Conditions

The condition(s) this trial relates to.

Patella Fracture patella, familial recurrent dislocation of Patellar Dislocation patellofemoral pain syndrome Recurrence

As listed by the trial registrant

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

Patellar dislocation Patellar dislocation, recurrent Patellar instability Patellofemoral dislocation Patellofemoral disorder Patellofemoral joint dislocation

How to take part

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

  1. The places running it

    16 sites. 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

  • Boston Children's Hospital

    RECRUITING

    Boston, Massachusetts, 02115, United States

  • Cincinnati Children's Hospital Medical Center

    RECRUITING

    Cincinnati, Ohio, 45229, United States

  • Cleveland Clinic

    NOT_YET_RECRUITING

    Cleveland, Ohio, 44195, United States

  • Duke Health

    RECRUITING

    Wake Forest, North Carolina, 27587, United States

  • Hospital for Special Surgery

    RECRUITING

    New York, New York, 10021, United States

  • Massachusetts General Hospital

    RECRUITING

    Boston, Massachusetts, 02114, United States

  • Mayo Clinic

    NOT_YET_RECRUITING

    Rochester, Minnesota, 55905, United States

  • Midwest Orthopaedics at Rush

    RECRUITING

    Chicago, Illinois, 60612, United States

  • Mount Sinai

    NOT_YET_RECRUITING

    New York, New York, 10012, United States

  • NYU Langone Health

    RECRUITING

    New York, New York, 10016, United States

  • Ohio State University Wexler Medical Center

    RECRUITING

    Dublin, Ohio, 43016, United States

  • Oregon Health & Science University

    RECRUITING

    Portland, Oregon, 97239, United States

  • Scottish Rite for Children

    RECRUITING

    Dallas, Texas, 75219, United States

  • Stanford University

    RECRUITING

    Redwood City, California, 94063, United States

  • University of Florida

    RECRUITING

    Gainesville, Florida, 32607, United States

  • University of Iowa

    RECRUITING

    Iowa City, Iowa, 52242, United States

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