Greater Trochanteric Pain Syndrome: Efficacy of Ultrasound Guided Platelet-rich Plasma vs Needle Tenotomy.

Study Overview
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Brief Summary
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Great trochanteric pain syndrome (GTPS) is a difficult problem to manage and result in significant patient morbidity. This study is a single-center, randomised double-blind controlled trial. Eighty patients will be allocated to have ultrasound (US)-guided injection of pure platelet-rich plasma (PRP) or needle tenotomy. Outcome data will be collected before the intervention, and at 3, 6 and 12 months after intervention. Main outome measure: percent of patients that experience a reduction of 25% in hip outcome score (HOS) (responders) at 6 months after intervention. Secondary outcome measures include percent of responders at three and twelve months, pain reduction (VAS) at 3, 6 and 12 months. Adverse reactions or events will be recorded.

Detailed Description
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Evaluation of gluteal tendon pathology, including superoposterior and lateral aspects of gluteus medius and gluteus minimus(changes in echotexture, partial tears, calcified deposits, thickness and loss of fibrillar pattern were evaluated by ultrasound at baseline, six and 12 m post treatment. Peritrochanteric pathology including tensor fascia lata, trochanteric bursa and cortical irregularities were also recorded.To analyze the relationship between the possible predictor variables (including sociodemographic and clinical factors, and imaging biomarkers, such as tendon degeneration and abnormalities in the peritrochanteric space) and changes in pain (VAS score) and functionality (HOS score), multivariate analyses were performed using multiple linear regressions.

Official Title
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Great Trochanteric Pain Syndrome: Parallel Group, Blind Randomised Clinical Trial to Assess the Efficacy and Safety of PRP Injection Versus Needle Tenotomy With Lidocaine

Conditions
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Tendinopathy

Intervention / Treatment
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* Drug: platelet rich plasma


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients of both sexes between the ages of 35 and 75 years. At the screening visit, they present hip pain at 3 points out of 10 in EVA. Body Mass Index values between 20 and 35 (both values included). Commitment to comply with all study procedures. Diagnoses of chronic GTPS according to the diagnostic criteria that have been previously described. The patient must give written informed consent. Women of child-bearing age must obtain a negative test result of pregnancy in blood or urine and accept the use of appropriate contraception while in the trial. Exclusion Criteria: • Body Mass Index>35. Presence of full tendon tear. Systemic autoimmune rheumatologic disease (connective tissue diseases and systemic necrotizing vasculitis) Poorly controlled diabetes mellitus (glycosylated hemoglobin above 9%) Blood disorders (thrombopathy, thrombocytopenia, anemia with Hb <9) Patients receiving immunosuppressive treatments Treatment by intramuscular corticoid, during the 3 months prior to the first administration of the trial treatment. Treatment with non-steroidal anti-inflammatory drugs (more than 10 days consecutive to usual doses), opiates or oral steroids during the 15 days prior to treatment in the study. Severe heart disease Patients unable to comply with scheduled visits, for work or spend long periods away from their habitual residence. Patients with active cancer or cancer diagnosed in the last five years. Analytical Diagnosis Hepatitis B, C or HIV infection. Pregnant or lactating. People who are taking a drug in clinical investigation or participated in any investigational study clinic (with an authorized or not) within 30 days prior to randomization.

Ages Eligible for Study
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Minimum Age: 35 Years
Maximum Age: 75 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: Single center, superiority type, double blinded, randomised controlled study
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Platelet rich plasma (PRP)<br>3 mL of autologous platelet rich plasma with a moderate concentration of platelet (2x above peripheral blood) and no leukocytes will be injected under ultrasound guidance | Drug: platelet rich plasma<br>* platelet rich plasma prepared from peripheral blood using single spin centrifugation<br>* Other names: PRP;|
| Active Comparator: control<br>needle tenotomy with lidocaine | Drug: platelet rich plasma<br>* platelet rich plasma prepared from peripheral blood using single spin centrifugation<br>* Other names: PRP;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Rate of participants that showed a clinically minimal clinically important change in function as measured by HOS (Hip Outcome Score, Activity of Daily Living Scale) | Rate of participants that experience at least 25% change in Hip Outcome score (HOS) (comparing to baseline) (Hip Outcome Score, Activity of Daily Living Scale, 0 (worst) to 100 (level of activity prior to hip problem) | 6 months | 
| Number of adverse events related to treatment | Differences in the patient self-reported adverse events related to treatment | 3 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Rate of patients that experience a significant minimal clinically important change in HOS at 3 and 12 months | Rate of patients that experience at least 25% change in Hip Outcome score (HOS, Activity of Daily Living Scale, 0 to 100 (level of activity prior to hip problem) | 3 and 12 months | 
| Pain changes (VAS) (0 to 10 maximum pain) | Pain changes assessed by visual analog scale (VAS) | 3, 6 and 12 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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ultrasound;platelet-rich plasma;tendinopathy;pain;trochanter