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Treatment of Acute and Chronic Ligament and Tendon Injuries With Platelet Rich Plasma

The recruitment status of this study is unknown because the information has not been verified recently.
Verified July 2011 by Stanford University.
Recruitment status was  Recruiting
Information provided by:
Stanford University Identifier:
First received: July 28, 2011
Last updated: July 29, 2011
Last verified: July 2011
Platelet rich plasma has been used in previous studies to stimulate faster healing of torn ligaments and tendons in order to help reduce pain and restore normal function. This study aims to prove that non-operative treatment of acute and chronic ligament and tendon injuries with platelet rich plasma will reduce the time needed for participants to heal these injuries and restore function.

Condition Intervention
Procedure: Ultrasound-guided platelet-rich-plasma (PRP) injection
Procedure: Ultrasound-guided dry needling

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Randomized, Double-blind Clinical Trial of Platelet Rich Plasma for Treatment of Acute and Chronic Patellar Tendinosis

Resource links provided by NLM:

Further study details as provided by Stanford University:

Primary Outcome Measures:
  • Patient-reported improvement in symptoms at 12 weeks [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Reduction in patellar tendinosis by MRI [ Time Frame: 6 months ] [ Designated as safety issue: No ]

Estimated Enrollment: 100
Study Start Date: August 2009
Estimated Study Completion Date: June 2012
Estimated Primary Completion Date: December 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Sham Comparator: Dry needling
Blood will be drawn, and tendon will be penetrated with dry needle. Nothing will be injected into the tendon.
Procedure: Ultrasound-guided dry needling
Blood will be drawn, and tendon will be penetrated with dry needle under ultrasound guidance. Nothing will be injected into the tendon.
Experimental: Platelet-rich plasma (PRP)
Blood will be drawn, and platelet-rich plasma will be injected into the tendon.
Procedure: Ultrasound-guided platelet-rich-plasma (PRP) injection
Blood will be drawn, and platelet-rich plasma will be injected into the tendon under ultrasound guidance.

Detailed Description:

Pre-procedure diagnosis: The appropriate clinical evaluation will be dictated by the examining physician. Minimal pre-procedure studies will include plain radiographs and MRI. All patients will complete a pretreatment questionnaire.

Patients will be randomized and blinded to the treatment regimen.

Method of randomization: Some of the participating subjects will receive platelet rich plasma and others will receive a saline injection. The platelet rich plasma experimental group will have 50cc of whole blood collected via venipuncture and prepared using the standard PRP protocol.

To blind the control group these patients will have a simulated needle stick and 10 ml (2 teaspoons) of blood will be drawn to test for growth factors. No blood will be given back to the patient. For those in the control group their ligament or tendon will be injected with saline. The staff nurse will place the blood (experimental group) or saline (control group) in syringes and the treating physician and patient will be blinded to the treatment.

Platelet rich plasma injections have an equivalent risk profile to routine injections. Those potential risks include skin discoloration, pain at injection site, superficial or deep infection, no relief of symptoms, worsening of symptoms, and damage to nerve and blood vessels. Potential benefits include significant improvement in symptoms and reduction in time for return to function.

Post injection activity: All patients will be non-weight bearing for 24-48 hours after injection. All patients will have physical therapy two times a week according to a standardized protocol.

Follow up at the clinic for all patients will be every other week from week 1-12. All patients will fill out an injury location specific questionnaire, Tegner Activity Scale, short form-12, and visual analog scale for pain. All radiographic studies will be read by one Stanford radiologist blinded to the study groups.

The endpoint for all patients in the study will be twelve weeks.


Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

-Acute or chronic ligament or tendon injuries

Exclusion Criteria:

  • Pregnant women,
  • children,
  • other injuries that require surgical intervention,
  • associated fractures,
  • systemic disease resulting in an immunocompromised state affecting ability to heal soft tissues
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01406821

Contact: Amy S Wasterlain (718) 644-5731

United States, California
Stanford University School of Medicine Recruiting
Stanford, California, United States, 94305
Contact: Amy S Wasterlain    718-644-5731   
Contact: Jason L Dragoo, MD    (650) 721-3430   
Principal Investigator: Dr. Jason L. Dragoo         
Study Director: Amy Sarah Wasterlain         
Sponsors and Collaborators
Stanford University
Study Director: Amy Sarah Wasterlain Stanford University
Principal Investigator: Dr. Jason L. Dragoo Stanford University
  More Information

Responsible Party: Dr. Jason L. Dragoo, Stanford University School of Medicine Identifier: NCT01406821     History of Changes
Other Study ID Numbers: SU-10162010-7109  16595 
Study First Received: July 28, 2011
Last Updated: July 29, 2011
Health Authority: United States: Institutional Review Board

Keywords provided by Stanford University:
patellar tendon

Additional relevant MeSH terms:
Muscular Diseases
Musculoskeletal Diseases
Tendon Injuries
Wounds and Injuries processed this record on September 23, 2016