Clinical trial Recruiting at 1 site Interventional Ages 30 to 65

Comparing PRP and HA injections for knee osteoarthritis

Official title: THE USE OF FRESH PRP VS HA IN THE TREATMENT OF OSTEOARTHRITIS OF THE PATELLOFEMORAL JOINT Randomized Controlled Clinical Trial

Run by Istituto Ortopedico Rizzoli · NCT04937998 · Data updated 2026-11-12

This study is testing whether injections of platelet-rich plasma or hyaluronic acid can help people with knee osteoarthritis feel better over two years.

Quick facts

Study typeInterventional
Ages30 Years to 65 Years
SexAll
Enrollment166 (estimated)
SponsorIstituto Ortopedico Rizzoli
Academic / other
Locations1 site (Bologna)
StatusRecruiting
StartedOctober 26, 2022
Main results expectedSeptember 2026
Study endsSeptember 2026
Registry record updatedDecember 4, 2025
Trial IDNCT04937998 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are individuals aged 30 to 65 with isolated patellofemoral osteoarthritis symptoms and radiographic evidence of the condition.

Probably not a fit

Patients with recent knee surgeries, significant comorbidities, or those unable to consent may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study aims to evaluate the clinical outcomes of patients with patellofemoral osteoarthritis receiving either autologous platelet-rich plasma (PRP) or hyaluronic acid (HA) injections. A total of 166 patients will be enrolled in a double-blinded randomized controlled trial, with one group receiving PRP and the other receiving HA. Participants will be monitored over a 24-month period, with clinical evaluations and questionnaires administered at baseline and follow-up visits at 2, 6, 12, and 24 months to assess treatment effectiveness.

Why it matters

Potential benefit: If successful, this study could provide a more effective treatment option for patients suffering from patellofemoral osteoarthritis.

How similar studies have gone: Previous studies have shown promising results with both PRP and HA injections in treating osteoarthritis, suggesting potential for success in this approach.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Age between 30 and 65;
2. Signs and symptoms of isolated patellofemoral osteoarthritis present in one or both knees;
3. Radiographic signs of isolated patellofemoral osteoarthritis (according to Iwano et al stage 1-3 classification) or chondropathy (assessed on MRI) with K-L grade of the other compartments ≤ 2. \[PMID: 2302884 - PMID: 27979409\] ;
4. Hemoglobin \> 11 g/dl; Platelet count \> 150,000 plt/mm3 (Recently performed CBC exam);
5. No clinically significant electrocardiographic alterations (Recently performed ECG).
6. Ability and consent of patients to actively participate in clinical follow-up;
7. Signature of informed consent.

Exclusion Criteria:

1. Patients unable to express consent;
2. Patients who have undergone intra-articular infiltration of another substance within the previous 6 months;
3. Patients undergoing knee surgery within the previous 12 months;
4. Patients with malignant neoplasms;
5. Patients with rheumatic diseases;
6. Patients with diabetes;
7. Patients with hematologic diseases (coagulopathies);
8. Patients on anticoagulant-antiaggregant therapy;
9. Patients with thyroid metabolic disorders;
10. Patients abusing alcoholic beverages, drugs or medications;
11. Body Mass Index \> 35;
12. Patients who have taken NSAIDs in the 3 days prior to blood draw;
13. Patients with cardiovascular disease for which a 60 mL blood draw would be contraindicated;
14. Patients with a recently performed blood test with Hb\< 11 g/dl and Platelets \< 150,000 plt/mm3.
15. Previous treatment of patellar dislocation
16. Iwano score of grade 4.

Where it's running

  • Istituto Ortopedico Rizzoli
    Bologna, Italy
    Recruiting

Study contacts

  • Principal investigator: Alessandro Di Martino, MD — Istituto Ortopedico Rizzoli
  • Study coordinator: Roberta Licciardi, MSc
  • Email: roberta.licciardi@ior.it
  • Phone: 0516366567

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

  • FDG PET/MRI to Find Painful Inflammation in the Patellofemoral Joint

    This study tests whether FDG PET/MRI can locate inflammation causing knee pain in people with patellofemoral joint osteoarthritis.

    Recruiting University of California, San Francisco · San Francisco, California · NCT07625150

  • Engineered cartilage grafts for treating knee osteoarthritis

    This study is testing a new cartilage treatment made from nasal cells to see if it helps people with knee osteoarthritis feel better compared to standard care options.

    Recruiting at 7 sites Phase 2 University Hospital, Basel, Switzerland · Vienna and 10 other locations · NCT06576583

  • Evaluating a new implant system for knee cartilage degeneration

    This study is testing a new knee implant to see if it can help people with cartilage damage feel less pain and move better compared to a standard surgery.

    Recruiting at 5 sites ZKR Orthopedics Inc · La Mesa, California and 4 other locations · NCT06423300

  • Treatment for knee osteoarthritis using engineered cartilage from nasal cells

    This study is testing whether a new cartilage treatment made from nasal cells can help people with knee osteoarthritis feel less pain and improve their knee function compared to standard injections.

    Recruiting at 7 sites Phase 2 University Hospital, Basel, Switzerland · Zagreb and 8 other locations · NCT06163573

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.