Is It Possible to Obtain Reliable MPTA and LDFA Values Using Imageless Navigation in Total Knee A… (NCT07574775) | Clinical Trial Compass
CompletedNot Applicable
Is It Possible to Obtain Reliable MPTA and LDFA Values Using Imageless Navigation in Total Knee Arthroplasty? Comparison Between Preoperative CT Scan Measurements and Intraoperative Bone Morphing Before and After Articular Cartilage Removal
France50 participantsStarted 2025-07-07
Plain-language summary
Title: Evaluation of Image-less Navigation Accuracy in Total Knee Arthroplasty (CARNAVAL)
Summary:
The purpose of this study is to evaluate the accuracy of an imageless navigation system in measuring key anatomical angles (MPTA and LDFA) during Total Knee Arthroplasty (TKA). While preoperative CT scans are currently the gold standard for bone planning, imageless navigation uses a "bone morphing" technique during surgery to create a digital model of the knee.
The study aims to determine if the measurements obtained via bone morphing, both before and after cartilage removal, are consistent with the measurements obtained from preoperative CT scans. The investigators seek to confirm if imageless navigation can provide reliable anatomical data, potentially reducing the need for preoperative radiation and costs associated with CT imaging.
Who can participate
Age range
18 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
Patients aged 18 years or older.
Patients with primary or secondary knee osteoarthritis requiring a Total Knee Arthroplasty (TKA).
Patients for whom the surgical planning requires a pre-operative 3D CT scan.
Patients who have been informed about the study and have signed the written informed consent.
Patients affiliated with or beneficiaries of a social security scheme.
Exclusion Criteria:
Revision Total Knee Arthroplasty (re-operation).
Major bone loss or significant bone deformity that prevents reliable anatomical landmarking.
History of prior knee surgery that could interfere with the navigation system trackers (e.g., retained hardware in the femur or tibia).
Pregnant or breastfeeding women.
Persons deprived of liberty or under legal guardianship.
Patients with a known allergy to any component used during the standard surgical procedure.
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Mean Difference in Medial Proximal Tibial Angle (MPTA) between CT scan and Imageless Navigation.
Timeframe: At the time of surgery (intra-operative).