- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01505452
Study of Surgical Technique With Use of Single-radius Prosthesis in Total Knee Replacement
January 8, 2019 updated by: Ormonde M. Mahoney, MD, Athens Orthopedic Clinic, P.A.
Translational Error in Flexion-extension Gap Balancing With Singe Radius Total Knee Arthroplasty
The purpose of this study is to clinically demonstrate a phenomenon of measurement error that can occur during placement of a specific type of total knee replacement prosthesis (single radius femoral component) using a certain type of surgical technique (flexion/extension gap balancing).
Study Overview
Status
Completed
Conditions
Study Type
Observational
Enrollment (Actual)
43
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
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Georgia
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Athens, Georgia, United States, 30606
- Athens Orthopedic Clinic
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Athens, Georgia, United States, 30606
- St Mary's Hospital
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Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years and older (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Sampling Method
Non-Probability Sample
Study Population
Clinic based population (patients undergoing total knee replacement at an orthopedic surgery clinic).
Description
Inclusion Criteria:
- Scheduled to undergo primary total knee arthroplasty performed by the principal investigator
- Use of a single radius posterior-stabilized TKA prosthesis is planned
- Spinal anesthetic is planned
- Diagnosis of osteoarthritis
- Has normal knee ligaments with no history of previous injury or surgery to ligaments, or other pathologic condition
- Has at least 100 degrees knee flexion preoperatively (measured by long goniometer)
- Gives valid informed consent
- Age 18 years or older
Exclusion Criteria:
- Patient receives general anesthetic
- Diagnosis other than osteoarthritis (e.g., rheumatoid arthritis, avascular necrosis, post-traumatic arthritis)
- History of any prior knee ligament injury, or any surgery to ligaments
- Any connective tissue disease affecting integrity of the ligaments (must have normal ligaments)
- History of long bone fracture in the affected leg
- Flexion contracture that would interfere with ability to establish extension gap reliably (judgment of investigator)
- Maximum pre-operative knee flexion is less than 100 degrees.
- Patient is non-ambulatory
- Any preclusion or inability to use navigation
- Treatment with single radius posterior stabilized TKA prosthesis is not indicated
- Participation is not in best interest of patient for any reason
- Cannot or does not give valid informed consent
- Female patient who is currently pregnant
- Age less than 18 years
- Body mass index greater than 40 kg/(m*m)
- Incarcerated
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Observational Models: Other
- Time Perspectives: Cross-Sectional
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Difference in varus/vagus laxity of the knee joint measured with the knee positioned at a 90 degree angle with posteriorly stabilized vs. cruciate retaining trails in place.
Time Frame: At the time of the surgical procedure
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During the surgical procedure each participant will undergo measurement of varus/valgus laxity (in degrees) at 90 degrees knee flexion using both types of trial implants in sequence.
We will evaluate whether the difference of varus/valgus laxity between the two surgical conditions is correlated to change in anterior/posterior relative position of the tibia (relative to femur) measured between the two conditions.
A positive correlation between these two variables (change of position to change of laxity) would demonstrate a potential for measurement error that could occur during surgical procedures if position change of the tibia is not accounted for.
All outcomes for this study are measured during the surgical procedure.
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At the time of the surgical procedure
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Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Collaborators
Investigators
- Principal Investigator: Ormonde M Mahoney, MD, Athens Orthopedic Clinic
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start
November 1, 2011
Primary Completion (Actual)
February 1, 2014
Study Completion (Actual)
February 1, 2014
Study Registration Dates
First Submitted
January 4, 2012
First Submitted That Met QC Criteria
January 5, 2012
First Posted (Estimate)
January 6, 2012
Study Record Updates
Last Update Posted (Actual)
January 9, 2019
Last Update Submitted That Met QC Criteria
January 8, 2019
Last Verified
January 1, 2019
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- AOC-OM-Stryker-2009-0019
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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