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Darmmicrobioom in orthopedie: revisie totale knieartroplastiek (GUMBO)

Darmmicrobioom bij orthopedie: het onderzoeken van de rol van darmmicrobioomsamenstelling in totale falen van knieartroplastiek

Many patients who receive knee replacement surgery must return for a revision (or repeat) surgery due to ongoing pain, stiffness, infection, or implant loosening. The role of the gut microbiome-the collection of bacteria and other microbes within the human gastrointestinal tract-is just beginning to be recognized in orthopaedics. The gut microbiome has been found to affect the immune response and bone regulation, potentially contributing to infection or loosening after total joint replacement. Antibiotics are regularly used in orthopaedic surgery to reduce the risk of infection, yet they might also harm gut microbiota and reduce their potentially beneficial effects. As a result, understanding the relationship between gut microbiota and surgical outcomes has become increasingly important. Therefore, this study aims to determine if there are differences in gut microbiota composition between patients with well-functioning knee replacements and those requiring revision knee replacements. Additional study aims include assessing inflammation, implant loosening, metal ion levels, and circulating bacteria in blood or tissue between well-functioning or failed knee replacements.

Studie Overzicht

Studietype

Observationeel

Inschrijving (Geschat)

30

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Studie Contact Back-up

Studie Locaties

    • Ontario
      • London, Ontario, Canada, N6A5A5
        • Werving
        • University Hospital
        • Contact:
        • Hoofdonderzoeker:
          • Brent Lanting, MD, MSc, FRCSC

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

  • Kind
  • Volwassen
  • Oudere volwassene

Accepteert gezonde vrijwilligers

Nee

Geslachten die in aanmerking komen voor studie

Allemaal

Bemonsteringsmethode

Niet-waarschijnlijkheidssteekproef

Studie Bevolking

Patients at University Hospital scheduled to undergo a revision TKA.

Beschrijving

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

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Observatiemodellen: COHORT
  • Tijdsperspectieven: PROSPECTIVE

Cohorten en interventies

Groep / Cohort
Interventie / Behandeling
Revision TKA

Participants scheduled to undergo a revision TKA will be recruited. They must be more than 3 months post-operation from their primary surgery, and the revision must be for something other than periprosthetic fracture, DAIR (debridement, antibiotics, and implant retention), or stage 2 periprosthetic joint infection.

Study participants must be scheduled to receive a revision TKA.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Gut Microbiome Composition
Tijdsspanne: Gut microbiome composition will be assessed pre-operatively and at 5 days and 6 weeks post-operation to determine how it changes post-operation.

The gut microbiome composition of the revision total knee arthroplasty (TKA) cohort prior to revision surgery will be compared to that of the well-functioning TKA cohort. Additionally, we will evaluate changes in the gut microbiome within the revision cohort from before surgery to six weeks after surgery.

Gut microbiome composition will be assessed pre-operatively and at 5 days and 6 weeks post-operation to determine how it changes post-operation.

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Inducible Displacement Measurements with Weight-Bearing Computed Tomography (WBCT)
Tijdsspanne: WBCT exams will be performed at one timepoint prior to the study participant's revision surgery.

Seated and standing WBCT exams will be performed. The bone and implant will be segmented, and a novel software (WBCT-based radiostereometric analysis (WBCT-RSA)) will be used to measure implant motion between the double seated exams (precision) or seated and standing exams (inducible displacement). Change in implant position will be measured in millimeters as maximum total point motion (MTPM). MTPM will be compared between the revision TKA cohort and a cohort with well-functioning implants.

WBCT exams will be performed at one timepoint prior to the study participant's revision surgery.
Inflammation in the Knee Joint Based on [18F]FEPPA Standard Uptake Values (SUV)
Tijdsspanne: PET/CT exams will be performed at one timepoint prior to the study participant's revision surgery.

Positron Emission Tomography/Computed Tomography (PET/CT) of the knee joint will be performed using the radiotracer [18F]FEPPA, which binds to molecules highly expressed on inflammatory cells. Radiotracer uptake will be quantified using SUV. SUV near the bone and joint will be calculated and compared between the revision TKA cohort and the well-functioning TKA cohort.

PET/CT exams will be performed at one timepoint prior to the study participant's revision surgery.

Andere uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Inducible Displacement and Microbiome Composition
Tijdsspanne: Inducible displacement exams will be performed pre-operatively and will be compared to the gut microbiome from pre-operation to 6 weeks post-operation, and to the intra-operative joint microbiome.

Joint and gut microbiome composition, along with inducible displacement measurements, will be assessed to determine whether alterations in the gut microbiome lead to increased within-bone implant motion.

Inducible displacement exams will be performed pre-operatively and will be compared to the gut microbiome from pre-operation to 6 weeks post-operation, and to the intra-operative joint microbiome.
Implant Wear Volume and Within-Bone Implant Motion from Inducible Displacement Exams
Tijdsspanne: Inducible displacement exams will be performed pre-operatively and will be compared to the amount of wear that has occurred on implants retrieved during revision surgery.

Seated and standing WBCT exams will be performed. The bone and implant will be segmented, and a novel software (WBCT-RSA) will be used to measure implant motion between the seated and standing exams (inducible displacement). Change in implant position will be measured in millimeters as MTPM. An optical coordinate measuring machine will be used to quantitatively measure the amount of volume loss from the retrieved implant components. Inducible displacement MTPM will be compared to volume loss to determine if greater within-bone implant motion may cause greater wear of the implant component resulting in more volume loss.

Inducible displacement exams will be performed pre-operatively and will be compared to the amount of wear that has occurred on implants retrieved during revision surgery.
Metal Ion Levels and Within-Bone Implant Motion from Inducible Displacement Exams
Tijdsspanne: Inducible displacement exams will be performed pre-operatively and will be compared to the amount of circulating metal ions pre-operation.

Seated and standing WBCT exams will be performed. The bone and implant will be segmented, and a novel software (WBCT-RSA) will be used to measure implant motion between the seated and standing exams (inducible displacement). Change in implant position will be measured in millimeters as MTPM. Metal ion levels (cobalt, chromium, nickel, and titanium) will be measured from a blood draw prior to the revision surgery. Inducible displacement MTPM and metal ion levels will be compared to determine if greater within-bone implant motion causes greater levels of circulating metal ions.

Inducible displacement exams will be performed pre-operatively and will be compared to the amount of circulating metal ions pre-operation.
[18F]FEPPA Activity and Microbiome Composition
Tijdsspanne: PET/CT exams will be performed pre-operatively and will be compared to the gut microbiome from pre-operation to 6 weeks post-operation, and to the intra-operative joint microbiome.

Joint and gut microbiome composition will be compared to [18F]FEPPA activity, to assess whether alterations in the gut microbiome contribute to increased inflammation in the knee joint.

PET/CT exams will be performed pre-operatively and will be compared to the gut microbiome from pre-operation to 6 weeks post-operation, and to the intra-operative joint microbiome.
[18F]FEPPA Activity and Implant Wear Volume
Tijdsspanne: PET/CT exams will be performed pre-operatively and will be compared to the amount of wear that has occurred on implants retrieved during revision surgery.

[18F]FEPPA activity from PET/CT will be used to detect the amount of inflammation present in the knee joint. An optical coordinate measuring machine will be used to quantitatively measure the amount of volume loss from the retrieved implant components as an indicator of wear. The relationship between volume loss and [18F]FEPPA activity will be assessed.

PET/CT exams will be performed pre-operatively and will be compared to the amount of wear that has occurred on implants retrieved during revision surgery.
[18F]FEPPA Activity and Metal Ion Levels
Tijdsspanne: PET/CT exams will be performed pre-operatively and will be compared to the amount of circulating metal ions pre-operation.

[18F]FEPPA activity from PET/CT will be used to detect the amount of inflammation present in the knee joint. Metal ion levels (cobalt, chromium, nickel, and titanium) will be measured pre-operatively and the relationship between inflammation and circulating metal ions will be assessed.

PET/CT exams will be performed pre-operatively and will be compared to the amount of circulating metal ions pre-operation.

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Onderzoekers

  • Hoofdonderzoeker: Brent Lanting, MD, MSc, FRCSC, Schulich School of Medicine & Dentistry

Publicaties en nuttige links

De persoon die verantwoordelijk is voor het invoeren van informatie over het onderzoek stelt deze publicaties vrijwillig ter beschikking. Dit kan gaan over alles wat met het onderzoek te maken heeft.

Algemene publicaties

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Werkelijk)

21 augustus 2025

Primaire voltooiing (Geschat)

1 december 2027

Studie voltooiing (Geschat)

1 december 2027

Studieregistratiedata

Eerst ingediend

7 april 2025

Eerst ingediend dat voldeed aan de QC-criteria

22 april 2025

Eerst geplaatst (Werkelijk)

30 april 2025

Updates van studierecords

Laatste update geplaatst (Werkelijk)

22 september 2026

Laatste update ingediend die voldeed aan QC-criteria

17 september 2026

Laatst geverifieerd

1 september 2026

Meer informatie

Termen gerelateerd aan deze studie

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

NEE

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .

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