Knee Positioning After Total Knee Replacement
30 juli 2026 bijgewerkt door: Brett Hayden, Icahn School of Medicine at Mount Sinai
The Effects of Postoperative Positioning in Knee Flexion Versus Usual Care After Total Knee Arthroplasty: A Randomized Controlled Trial
Many total knee replacements are performed each year, but there is no clear recommendation regarding knee positioning following this surgery.
While the surgical knee is usually positioned in a straight position immediately after surgery, there may be benefits of positioning it in a partially bent position.
A trial will compare the outcomes of two groups of patients: a) those whose knees are positioned in a partially bent position for a few hours after surgery and b) those who receive usual care where the knee is most likely positioned in a straight position.
The investigators are looking to see whether knee motion and pain differ for patients in the two groups.
Studie Overzicht
Toestand
Nog niet aan het werven
Conditie
Interventie / Behandeling
Gedetailleerde beschrijving
This parallel two-arm randomized controlled trial will compare outcomes for knee flexion versus usual care in the immediate postoperative period after total knee arthroplasty.
Patients who are scheduled for elective primary unilateral total knee arthroplasty will be recruited from an academic health system, screened for inclusion/exclusion criteria, and enrolled.
The experimental group will have their surgical knee positioned in approximately 60° of flexion for 2-4 hours after surgery.
The control group will receive usual care, where the knee will generally be positioned in extension.
Other than the study intervention, both groups will receive standard perioperative, intraoperative, and postoperative care as determined by their treating clinical team.
The co-primary endpoints are 6-week knee passive total arc of motion and 7-day maximum pain intensity.
Secondary outcomes will be assessed throughout the 12 months after surgery and will include knee motion and pain intensity at other time points; oral opioid consumption; patient-reported questionnaires of knee health, quality of life, and satisfaction; healthcare utilization; and complications.
Adverse events will also be monitored for the 12 months after surgery.
Outcomes will be assessed via phone or electronic surveys; routine care visits at 2.5 weeks, 6 weeks, 3 months, 6 months, and 12 months after surgery; and chart review.
Studietype
Ingrijpend
Inschrijving (Geschat)
150
Fase
- Niet toepasbaar
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
- Naam: Brocha Stern
- Telefoonnummer: 212-659-9650
- E-mail: brocha.stern@mountsinai.org
Studie Locaties
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New York
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New York, New York, Verenigde Staten, 10029
- Mount Sinai Health System
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Contact:
- Brocha Stern
- Telefoonnummer: (212) 659-9650
- E-mail: brocha.stern@mountsinai.org
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-
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
- Volwassen
- Oudere volwassene
Accepteert gezonde vrijwilligers
Nee
Beschrijving
Inclusion Criteria:
- Provision of signed and dated informed consent form
- Stated willingness to comply with all study procedures and availability for the duration of the study
- Males and females; Age >18 years
- Scheduled for elective primary unilateral total knee arthroplasty
- The planned arthroplasty is secondary to physician-confirmed diagnosis of knee osteoarthritis
- English- or Spanish-speaking
Exclusion Criteria:
- Patients with a history of chronic opioid use or chronic pain disorders
- Patients with a history of bleeding disorders/coagulopathy
- Patients receiving a total knee replacement secondary to trauma, avascular necrosis, tumor, or Charcot arthropathy
- Patients scheduled to undergo multiple procedures simultaneously
- Patients with cognitive impairment or inability to consent independently
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
- Primair doel: Behandeling
- Toewijzing: Gerandomiseerd
- Interventioneel model: Parallelle opdracht
- Masker: Enkel
Wapens en interventies
Deelnemersgroep / Arm |
Interventie / Behandeling |
|---|---|
|
Experimenteel: Knee Flexion
Participants in this arm will receive the knee flexion intervention.
|
Participants will receive knee flexion postoperatively following primary total knee arthroplasty.
The surgical knee will positioned at approximately 60° flexion using an abduction pillow as a jig underneath the knee during the immediate postoperative recovery period.
Positioning will occur following surgery while the participant is still in the operating room.
This is a soft construct and a noninvasive intervention.
A goniometer will be used to approximate 60° of flexion as closely as possible.
It is expected that the knee will be positioned for 2-4 postoperative hours until a physical therapist comes to mobilize the patient.
However, the duration may vary because of the pragmatic context.
There is no minimum or maximum positioning time that would make the intervention duration ineligible.
|
|
Actieve vergelijker: Usual Care
Participants in this arm will receive usual care.
No specific attention will be placed to knee positioning in the immediate period after surgery.
However, the current usual practice in the health system is that the knee is positioned in extension.
|
Participants in this arm will receive usual care.
No specific attention will be placed to knee positioning in the immediate period after surgery.
However, the current usual practice in the health system is that the knee is positioned in extension.
|
Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
|
Knee Passive Total Arc of Motion
Tijdsspanne: At 6 weeks after surgery
|
Passive total arc of motion will be evaluated through goniometric assessment of maximal passive knee flexion and passive knee extension.
Both measures will be recorded, but a single endpoint will be derived by subtracting available extension from available flexion.
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At 6 weeks after surgery
|
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Maximum Pain Intensity
Tijdsspanne: At 7 days after surgery
|
Pain intensity will be evaluated via the patient-reported Numeric Rating Scale (NRS) for pain.
The rating is from 0 to 10, with a higher score indicating worse pain.
The worst (i.e., maximum) pain intensity will be used.
|
At 7 days after surgery
|
Secundaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
|
Knee Passive Total Arc of Motion
Tijdsspanne: At 2.5 weeks, 3 months, 6 months, and 12 months after surgery
|
Passive total arc of motion will be evaluated through goniometric assessment of maximal passive knee flexion and passive knee extension.
Both measures will be recorded, but a single endpoint will be derived by subtracting available extension from available flexion.
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At 2.5 weeks, 3 months, 6 months, and 12 months after surgery
|
|
Maximum Pain Intensity
Tijdsspanne: At 0 days, 1 day, 2 days, 3 days, 10 days, 14 days, 2.5 weeks, 6 weeks, 3 months, 6 months, and 12 months after surgery
|
Pain intensity will be evaluated via the patient-reported Numeric Rating Scale (NRS) for pain.
The rating is from 0 to 10, with a higher score indicating worse pain.
The worst (i.e., maximum) pain intensity will be used.
|
At 0 days, 1 day, 2 days, 3 days, 10 days, 14 days, 2.5 weeks, 6 weeks, 3 months, 6 months, and 12 months after surgery
|
|
Total Opioid Consumption
Tijdsspanne: Postoperative days 0 through 14
|
Consumption of opioids standardized in oral morphine milligram equivalents based on medical records for in-hospital administration, prescriptions, and patient report for at-home consumption.
Consumption will be summed across days, with higher numbers indicating greater opioid consumption.
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Postoperative days 0 through 14
|
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Knee Injury and Osteoarthritis Outcome Score for Joint Replacement
Tijdsspanne: At 6 weeks, 3 months, 6 months, and 12 months after surgery
|
The Knee Injury and Osteoarthritis Outcome Score for Joint Replacement (KOOS, JR) is a patient-reported measure of knee health (i.e., pain and function).
Scores range from 0 to 100, with higher scores indicating better health.
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At 6 weeks, 3 months, 6 months, and 12 months after surgery
|
|
Veterans RAND 12-item Health Survey
Tijdsspanne: At 6 weeks, 3 months, 6 months, and 12 months after surgery
|
The Veterans RAND 12-item Health Survey (VR-12) is a patient-reported measure of global physical and mental health.
It provides a physical component summary score and a mental component summary score.
These are T-scores with a mean of 50, and higher scores indicate better health.
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At 6 weeks, 3 months, 6 months, and 12 months after surgery
|
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Goodman Satisfaction Score
Tijdsspanne: 12 months after surgery
|
The Goodman Satisfaction Score assesses patient satisfaction with total hip or knee arthroplasty outcomes.
Scores range from 0 to 100, with higher scores indicating greater satisfaction.
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12 months after surgery
|
|
Length of Hospital Stay
Tijdsspanne: Through hospital discharge, average of 1 day, up to 30 days after surgery
|
Number of days the patient stays in the hospital after the index surgery.
This information will be extracted from the medical record.
|
Through hospital discharge, average of 1 day, up to 30 days after surgery
|
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Percentage of Participants with an Emergency Department Visit
Tijdsspanne: Within 7 days, 30 days, and 90 days after surgery
|
Percentage of participants with an all-cause emergency department visit after surgery.
This information will be extracted from the medical record, with supplementation by participant queries during the postoperative visit after the respective timepoint.
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Within 7 days, 30 days, and 90 days after surgery
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Percentage of Participants with a Hospital Readmission
Tijdsspanne: Within 30 days and 90 days after surgery
|
Percentage of participants with an all-cause hospital readmission after surgery.
This information will be extracted from the medical record, with supplementation by participant queries during the postoperative visit after the respective timepoint.
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Within 30 days and 90 days after surgery
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Percentage of Participants with Deep Vein Thrombosis
Tijdsspanne: Within 30 days and 90 days after surgery
|
Percentage of participants who have deep vein thrombosis after surgery.
|
Within 30 days and 90 days after surgery
|
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Percentage of Participants with a Pulmonary Embolism
Tijdsspanne: Within 30 days and 90 days after surgery
|
Percentage of participants who have a pulmonary embolism after surgery.
This information will be extracted from the medical record, with supplementation by participant queries during the postoperative visit after the respective timepoint.
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Within 30 days and 90 days after surgery
|
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Percentage of Participants with a Venous Thromboembolism
Tijdsspanne: Within 30 days and 90 days after surgery
|
Percentage of participants who have a venous thromboembolism after surgery.
This information will be extracted from the medical record, with supplementation by participant queries during the postoperative visit after the respective timepoint.
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Within 30 days and 90 days after surgery
|
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Percentage of Participants with a Coronary Event
Tijdsspanne: Within 30 days and 90 days after surgery
|
Percentage of participants who have a myocardial infarction or other coronary event after surgery.
This information will be extracted from the medical record, with supplementation by participant queries during the postoperative visit after the respective timepoint.
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Within 30 days and 90 days after surgery
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Percentage of Participants with a Stroke
Tijdsspanne: Within 30 days and 90 days after surgery
|
Percentage of participants who have a stroke after surgery.
This information will be extracted from the medical record, with supplementation by participant queries during the postoperative visit after the respective timepoint.
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Within 30 days and 90 days after surgery
|
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Percentage of Participants with a Blood Transfusion
Tijdsspanne: Within 30 days after surgery
|
Percentage of participants who receive a blood transfusion after surgery.
This information will be extracted from the medical record, with supplementation by participant queries during the postoperative visit after the respective timepoint.
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Within 30 days after surgery
|
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Percentage of Participants with a Wound Dehiscence
Tijdsspanne: Within 30 days and 90 days after surgery
|
Percentage of participants who have a wound dehiscence after surgery.
This information will be extracted from the medical record, with supplementation by participant queries during the postoperative visit after the respective timepoint.
|
Within 30 days and 90 days after surgery
|
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Percentage of Participants with a Mechanical Complication
Tijdsspanne: Within 30 days and 90 days after surgery
|
Percentage of participants who have a mechanical complication after surgery.
This information will be extracted from the medical record, with supplementation by participant queries during the postoperative visit after the respective timepoint.
|
Within 30 days and 90 days after surgery
|
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Percentage of Participants with a Manipulation under Anesthesia
Tijdsspanne: Within 12 months after surgery
|
Percentage of participants who undergo a manipulation under anesthesia after surgery.
This information will be extracted from the medical record, with supplementation by participant queries during the postoperative visit after the respective timepoint.
|
Within 12 months after surgery
|
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Percentage of Participants with a Knee Revision Surgery
Tijdsspanne: Within 12 months after surgery
|
Percentage of participants who undergo a knee revision surgery after the index surgery.
This information will be extracted from the medical record, with supplementation by participant queries during the postoperative visit after the respective timepoint.
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Within 12 months after surgery
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Medewerkers en onderzoekers
Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.
Onderzoekers
- Hoofdonderzoeker: Brett Hayden, MD, Icahn School of Medicine at Mount Sinai
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 (Geschat)
1 september 2026
Primaire voltooiing (Geschat)
1 februari 2028
Studie voltooiing (Geschat)
1 februari 2029
Studieregistratiedata
Eerst ingediend
30 juli 2026
Eerst ingediend dat voldeed aan de QC-criteria
30 juli 2026
Eerst geplaatst (Werkelijk)
5 augustus 2026
Updates van studierecords
Laatste update geplaatst (Werkelijk)
5 augustus 2026
Laatste update ingediend die voldeed aan QC-criteria
30 juli 2026
Laatst geverifieerd
1 juli 2026
Meer informatie
Termen gerelateerd aan deze studie
Trefwoorden
Aanvullende relevante MeSH-voorwaarden
Andere studie-ID-nummers
- Study 26-00680
Plan Individuele Deelnemersgegevens (IPD)
Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?
NEE
Beschrijving IPD-plan
No individual participant data is planned to be shared with other researchers.
Informatie over medicijnen en apparaten, studiedocumenten
Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel
Nee
Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct
Nee
product vervaardigd in en geëxporteerd uit de V.S.
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 .