NCT06940479 · University of Colorado, Denver
Evaluating Changes in Synovial Fluid Before and After GAE for Knee Osteoarthritis
(GAE-KOA)
What this study is about
The goal of this clinical trial is to learn if genicular artery embolization (GAE) can improve knee pain and decrease inflammation in adults with knee osteoarthritis. The main question it aims to answer is: \- Does the GAE procedure improve knee pain and decrease inflammation? Researchers will compare synovial fluid samples taken from the knee before and after the procedure.
View original scientific description
The goal of this clinical trial is to learn if genicular artery embolization (GAE) can improve knee pain and decrease inflammation in adults with knee osteoarthritis. The main question it aims to answer is: \- Does the GAE procedure improve knee pain and decrease inflammation? Researchers will compare synovial fluid samples taken from the knee before and after the procedure.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Age ≥ 18 years
- Planned to undergo genicular artery embolization to treat knee osteoarthritis.
- Osteoarthritis on knee radiograph (Kellgren-Lawrence score 1-3) within the last 6 months
- Persistent moderate to severe knee pain (visual analog scale \[VAS\] \>3) for at least 6 months
- Pain refractory or intolerant to conservative therapies (e.g. analgesia, exercise, weight-loss, joint injections, physical therapy)
- BMI \< 35 kg / m2
- Stated willingness to comply with study procedures and availability for the duration of the study
Exclusion criteria
- Coagulation disturbances not normalized by medical treatment (INR \>1.8 and platelets \<50 x 10\^9/L)
- Receiving medications for anticoagulation which cannot safely be held for the procedure (e.g ASA for 5 days, Lovenox for 24 hours, Eliquis for 4-6 days depending on creatinine clearance
- Allergy to iodinated contrast agents not responsive to steroid premedication regimen
- Active knee joint infection
- Acute knee injury with surgical indication (MRI evidence of acute fracture or ligamentous injury of the knee)
- Prior total or partial knee replacement in the subject knee
- Intra-articular steroid injection within 2 months
- Untreated lower extremity vascular arterial disease
- Untreated venous insufficiency
- Presence of medical condition with life expectancy less than 6 months
- Patients who have undergone previous lower extremity embolization
- Patients with renal insufficiency based on an estimated GFR\<45 ml/min who are not already on hemodialysis
- Patients who are pregnant or intend to become pregnant within 6 months of the procedure
- American Society of Anesthesiologists classification \> 3
- Less than 3 mm of synovial fluid in the lateral suprapatellar recess on MRI or US
Where
- Aurora, Colorado
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Mar 24, 2026 · Source of record for eligibility and locations