Plasma Injections Plus Exercise for Patellar Tendinopathy (PHS)

December 19, 2018 updated by: Alexander Scott, University of British Columbia

Intratendinous Injections of Platelet Rich Plasma With or Without Leukocyte Enrichment for Patellar Tendinopathy: a Randomized Controlled Trial

This is a randomized controlled clinical trial to investigate the effectiveness, safety and tolerability of platelet-rich plasma (PRP) injections for treatment of patellar tendinopathy in adults 18-50 years of age. Subjects will be randomly assigned to three parallel treatment groups:

  1. Leukocyte-rich PRP injection + exercise
  2. Leukocyte-poor PRP injection + exercise
  3. Saline injection + exercise (control) Primary endpoints are (1) the number (rate) and severity of adverse events as reported by both patients and study physicians during the first 12 weeks after initiation of treatment, (2) patient-rated tolerability of treatment; (3) the change in function (VISA score) and treatment success (global improvement scale) over six months of a post-injection exercise protocol.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Terminated

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
64

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Canada
    • British Columbia
      • Vancouver, British Columbia, Canada, V6T 1Z4
        • University of Britich Columbia
  • Italy
      • Bologna, Italy
        • Rizzoli Orthopaedic Institute
  • Norway
      • Oslo, Norway
        • Oslo Sports Trauma Research Center
  • United States
    • Colorado
      • Vail, Colorado, United States, 81657
        • The Steadman Clinic
    • Washington
      • Seattle, Washington, United States, 98195
        • University of Washington

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

14 years to 46 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Male or female ≥ 18 and ≤ 50 years of age at Enrollment Visit
  • Documentation of a clinical diagnosis of patellar tendinopathy, grade-IIIB Blazina stage, confirmed on ultrasound
  • Previously tried an exercise program of at least six weeks duration
  • Fluent in official language of study site
  • Written informed consent obtained from subject
  • Normal values on screening laboratory panels (CBC, PT, PTT, INR, serum creatine, ALT, ALP, AST, bilirubin, albumin)

Exclusion Criteria:

  • For women of child-bearing potential, positive pregnancy test at enrollment visit
  • Major surgery in the past three months
  • Surgery on the symptomatic knee
  • Bleeding disorder
  • Systemic inflammatory disease
  • Arthritis or degenerative knee condition
  • Recent fluoroquinolone use
  • Subjects who have any requirement for the use of systemic steroids or immunosuppressants
  • Subjects who are known to be HIV positive
  • Uncooperative patient, or patients who are incapable of following directions or who are predictably unwilling to return for follow-up examinations
  • Presence of a condition or abnormality that in the opinion of the Investigator would compromise the safety of the patient or the quality of the data

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Leukocyte-rich Platelet Rish Plasma + exercise
Leukocyte-rich PRP injection and a 12 week exercise program.
Biological: Platelet Rich Plasma (PRP)
Injection of Leukocyte-rich or Leukocyte-poor Platelet Rich Plasma prepared by the Angel cPRP System along with a 12 week exercise program for treatment of patients with patellar tendinopathy.
Other Names:
  • The device Angel cPRP System will be used to make (Leukocyte-rich or -poor) PRP injections
Experimental: Leukocyte-poor Platelet Rich Plasma + exercise
Leukocyte-poor PRP injection and a 12 week exercise program.
Biological: Platelet Rich Plasma (PRP)
Injection of Leukocyte-rich or Leukocyte-poor Platelet Rich Plasma prepared by the Angel cPRP System along with a 12 week exercise program for treatment of patients with patellar tendinopathy.
Other Names:
  • The device Angel cPRP System will be used to make (Leukocyte-rich or -poor) PRP injections
Placebo Comparator: Saline + exercise
Saline injection and a 12 week exercise program.
Other: Saline + exercise
Peritendinous saline injection plus 12 week exercise program.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Clinical Efficacy
Time Frame: 2 years
Number and frequency of adverse events will be assessed/reported weekly for the first 12 weeks and at the 6 month visit.
2 years

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Change in function over time measured by VISA Score
Time Frame: 2 years
To compare change in function (VISA score) between participants randomized to the three treatment groups over six months, 1 year, and 2 years of a post-injection exercise protocol.
2 years
Comparison of treatment success measured by Likert Global Improvement Scale
Time Frame: 2 years
To compare change in treatment success (Likert global improvement scale) between participants randomized to the three treatment groups over six months, 1 year, and 2 years of a post-injection exercise protocol.
2 years
Change in activity levels over time measured by Tegner Activity Score
Time Frame: 2 years
To compare change in activity levels (Tegner Activity Score) between participants randomized to the three groups over six months, 1 year, and 2 years of an exercise protocol.
2 years
Change in activity-related pain over time measured by Pain Numeric Rating Scale
Time Frame: 2 years
To compare change in activity-related pain (Pain Numeric Rating Scale) between participants randomized to the three groups over six months, 1 year, and 2 years of an exercise protocol.
2 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
University of British Columbia

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
University of Oslo
University of Washington
American Orthopaedic Society for Sports Medicine
Rizzoli Orthopaedic Institute
Norwegian Olympic Sports Center
Steadman Clinic

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Alexander Scott, PhD, University of British Columbia

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
March 1, 2014

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 1, 2018

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 1, 2018

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
April 9, 2014

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 15, 2014

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
April 17, 2014

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
December 21, 2018

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 19, 2018

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
December 1, 2018

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • H13-00254

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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