Comparison of Ultrasound-Guided Intra-articular and Combined Peri-articular PRP Injections for Treating Chronic Knee Osteoarthritis
Effects on Pain, Function, Daily Activities, and Knee Tissue Thickness
Led by Ankara City Hospital Bilkent · Updated on 2026-01-15
42
Participants Needed
1
Research Sites
12 weeks
Total Duration
AI-Summary
What this Trial Is About
Researchers are studying chronic knee osteoarthritis OA, a common joint disease that causes cartilage breakdown, pain, stiffness, and disability. This trial evaluates and compares two platelet-rich plasma PRP injection methods combined intra-articular and peri-articular injections versus intra-articular injections alone. The goal is to understand how these treatments affect pain, physical function, daily activities, and structural changes in knee tissues like the medial collateral ligament MCL and distal femoral cartilage.
Participants will be divided into three groups one receiving conservative treatment with exercise and lifestyle changes another receiving conservative treatment plus ultrasound-guided intra-articular PRP injections and a third group receiving conservative treatment plus combined ultrasound-guided intra-articular and peri-articular PRP injections targeting the MCL and pes anserinus areas. PRP injections are given three times at one-week intervals, using a standardized preparation and photo-activation system to enhance growth factor release.
Participants will be assessed at the start, one week after treatment completion, and three months after treatment using pain and function scales like the Visual Analog Scale VAS, Western Ontario and McMaster Universities Osteoarthritis Index WOMAC, and quality of life survey SF-36. Ultrasound measurements of MCL and cartilage thickness will also be taken to track structural changes. Patients will follow exercise therapy and lifestyle recommendations, with adherence monitored during follow-ups. The study aims to provide insights into more effective PRP injection approaches for managing knee OA.
CONDITIONS
Brief Title
The Effects of Intra-articular and Peri-articular Platelet-rich Plasma (PRP) Injections ın Chronic Knee Osteoarthritis
Research Team
R
Rıdvan E ÇELİK
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Patients with significant medial knee pain who have not responded to conservative treatment for at least 3 months
Diagnosis of knee osteoarthritis as per American College of Rheumatology (ACR) criteria with Kellgren-Lawrence grade 2 or 3
Intact cognitive function
Willingness to participate and provide signed informed consent
Visual Analog Scale (VAS) score of 4 or higher
You will not qualify if you...
History of previous knee trauma or surgery
Physical therapy, intra-articular steroid, or hyaluronic acid injections in the knee within the last 3 months
Active cancer or oncological diseases
Local infection, sepsis, wounds, or scars in the injection area
Systemic infections, hepatitis, or immunosuppression
Bleeding disorders or irregular INR due to warfarin use
Inflammatory arthritis conditions
Uncontrolled hypertension, diabetes, heart failure, coronary artery disease, or asthma
Suspected or confirmed pregnancy
Use of corticosteroids or opioids
Anemia
Body mass index (BMI) greater than 35
Allergy to citrate
Use of NSAIDs within the last week that affect platelet function
Signs of patellar retinaculum, meniscus, or cruciate ligament injury
General health impairment or lack of cooperation
Refusal to participate in the study
Your Study Journey
Screening
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Treatment
Duration - 3 weeks
Participants receive their assigned treatment: conservative therapy only, intra-articular PRP injections plus conservative therapy, or combined intra-articular and peri-articular PRP injections plus conservative therapy. PRP injections are given three times at one-week intervals, with post-procedure recommendations including resting the knee and avoiding certain medications and aggressive exercises.
3 injection visits (in-person)
Follow-up
Duration - Approximately 3 months
Participants are evaluated at 1 week and 3 months after treatment completion to assess pain, function, quality of life, and structural changes using clinical scales and ultrasound measurements.
2 follow-up visits (in-person)
How is the study designed?
Study Type
INTERVENTIONAL
Masking
NONE
Allocation
RANDOMIZED
Model
PARALLEL
Primary Purpose
TREATMENT
Number of Arms
3
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Published Research Related To This Trial
The temporal effect of platelet-rich plasma on pain and physical function in the treatment of knee osteoarthritis: systematic review and meta-analysis of randomized controlled trials.
Three Doses of Platelet-Rich Plasma Therapy Are More Effective Than One Dose of Platelet-Rich Plasma in the Treatment of Knee Osteoarthritis: A Systematic Review and Meta-analysis.