A Comparison of PRP Treatment to the IA vs. IA and EA Environments in Patients Diagnosed With Hip Osteoarthritis
A Comparison of Platelet-rich Plasma Treatment to the Intra-articular vs. Intra- and Extra-articular Environments in Patients Diagnosed With Hip Osteoarthritis
  • Phase

    Phase 1
  • Study Type

  • Status

  • Study Participants

The purpose of this study is to evaluate the efficacy of one leukocyte-poor platelet-rich plasma (LP-PRP) injection to the intra-articular (IA) space in comparison to one LP-PRP injection to the IA space with an additional injection into the surrounding extra-articular (EA) structures for the treatment of hip OA (Kellgren Lawrence Grades 1-3). Our hypothesis is that patients receiving both IA and EA LP-PRP injections will have equivalent improvements on HOOS JR and VAS scores over a 12-month period compared to those in the active comparator group (IA LP-PRP injection).
A novel comprehensive approach through which the joint and its surrounding structures are treated as an integrated system may offer a clinically superior treatment to hip osteoarthritis (OA) compared to only an intra-articular (IA) infiltration. The efficacy of autologous leukocyte-poor platelet-rich plasma (LP-PRP) for the treatment of OA is a growing area of regenerative orthopedic research.

The purpose of this study is to determine if a LP-PRP treatment to both the IA space and EA supporting capsular ligament and tendon structures provides a significant clinical benefit when compared to an IA treatment alone. In this clinical study of 84 patients, both study arms receive effective treatments that are supported by sound medical evidence, making this an ethically strong model to address our hypothesis.

This is a multi-site, randomized, comparative study of LP-PRP treatment into the IA space versus the IA space and EA hip structures. This study is sponsored by Regenerative Orthopedics and Sports Medicine (ROSM) and EmCyte Corporation. Patients who meet the study criteria with at least mild pain as indicated by >25/100 on a 100mm visual analogue scale (VAS) (Sanchez et al. 2011), or <80/100 on HOOS JR with radiographic evidence of Kellgren-Lawrence grades 1-3 hip OA will be invited to participate in this study.

The preparation of PRP is a simple tissue fractionation using centrifugation with EmCyte PurePRP Supraphysiologic SP kit [EmCyte Corp. Fort Myers FL]. Platelet quantification analysis is performed using the Horiba ABX Micros ES 60 [Plymouth Medical]. Primary outcome measures are indicated by overall hip pain severity by HOOS JR and VAS patient reported outcome measures.
Study Started
Aug 25
Primary Completion
Dec 01
Study Completion
Aug 25
Last Update
Sep 09

Biological Leukocyte-poor platelet rich plasma

Platelet rich plasma was prepared using PurePRP Supra Physiologic Protocol A preparation [EmCyte Corp. Fort Myers FL].

Intra-articular LP-PRP Injection Active Comparator

A single injection of leukocyte poor platelet rich plasma (LP-PRP) will be administered to the intra-articular space under ultrasound guidance at the treatment visit.

Intra- and extra- articular LP-PRP Injection Experimental

A single injection of LP-PRP will be administered to the intra- articular space and the extra- articular structures under ultrasound guidance at the first visit.



Symptomatic OA of hip (K-L Grade 1-3) documented by x-ray taken within the past 6 months
Male or female age 30 - 65 at time of enrollment
Patients must have adequate immune system function with no known immunodeficiency
Has not had a corticosteroid injection in the past 6 months
Has not used non-steroidal anti-inflammatory 7 days prior to treatment and has not used oral
corticosteroids 30 days prior to treatment
If on chronic anticoagulant medication, we will follow the recommendations of the physician
managing their anticoagulant medication
Willing and able to participate for the entire study period
No evidence of current systemic infection or illness (eg. fever, malaise, etc.) and no evidence
of skin infection in the areas where the injection will be performed


Patients have been diagnosed with an autoimmune disease, diabetes, rheumatoid arthritis,
hematologic conditions predisposing to bleeding disorders or platelet dysfunction, Paget's disease of femur or ilium, avascular necrosis (AVN) of the femoral head, infectious arthritis, Lyme disease.
Previous reparative cellular/ orthobiologics /PRP injection
≥7mm hip effusion as measured on ultrasound at the femoral neck
K-L Grade 4 OA x-ray documented
Patient has a history of alcohol or drug abuse within the six months prior to enrolment in the study
Patients who had intra-articular treatment with corticosteroids within 6 months of randomization in this study
Patient received more than 2 previous intra- or extra-articular corticosteroid injections to the affected hip.
Patients who are pregnant or nursing at the time of consent
Patients who have had anorexia, chronic insomnia, immunocompromised state, and/ or are on immunosuppressive medication
Neoplastic cancer within 5 years prior to screening and no evidence of recurrence, except for cutaneous (basal cell and squamous cell) cancer treated with excision
History of chemotherapy within the past 3 years or radiation therapy to the involved hip area
Patients with inflammatory arthritic conditions (e.g. rheumatoid arthritis)
Patients who have had previous intervention to the hip except for labral repair/ reconstruction and/ or femoral neck osteoplasty or acetabular osteoplasty without microfracture.
Additional disabilities in any of the lower limbs that would interfere with any of the clinical assessments.
Use of NSAID 7 days prior to treatment or oral or subcutaneous corticosteroids 30 days prior
Patients with a BMI over 35
Deformity or dysplasia (i.e. Legg Calve Perthes or DDH) other than FAI.
Patients with systemic infection, hematological conditions, malignancy, blood borne diseases, allergies to lidocaine.
No Results Posted