Platelet-Rich Plasma Injections


Platelet Rich Plasma (PRP) is a new and exciting treatment.  PRP is becoming increasingly popular because of its effectiveness in treating various sports injuries, as well as, osteoarthritis.  PRP is viewed as a very “natural” treatment that is derived from your own blood, and does not involve the injection of any medication. Every year, more and more research studies have been completed and have increasingly shown the effectiveness of PRP.

PRP is a procedure in which a sample of your blood is put into a special centrifuge which separates your blood into different components.  The part of the blood that contains the platelets also has a high concentration of Growth Factors.  These Growth Factors are then injected back into your body part that is injured to promote healing.

The Growth Factors in PRP work to promote healing by helping your body to produce “collagen” which is a building block for musculoskeletal tissue such as bone, tendons, ligaments and cartilage.  They also promote the growth and development of the actual cells that make up this musculoskeletal tissue, thereby helping with the healing process.  These Growth Factors also stimulate new blood vessel formation and help in the development of “stem cells” which form the basis of new tissue growth.  The Growth Factors contained in PRP also have an anti-inflammatory effect.

Some common conditions in sports medicine that are treated with PRP include:

  • Tendonitis, tendinopathies (e.g., “Tennis elbow”, patellar tendonitis, plantar fasciitis, rotator cuff injuries, etc.)
  • Osteoarthritis of the knee and other joints
  • Articular cartilage injuries, meniscus tears
  • Other tendon, muscle and ligament injuries

Over the past 5 years, there has been a lot of research showing the effectiveness of PRP for treating osteoarthritis (especially OA of the knee).  PRP tends to have a long lasting effect (between 1 to 2 years).  Research indicates that you can expect decreased pain and improved function for daily activities and exercise.

One of the main benefits of PRP injections is the potential for regeneration of articular cartilage.  Because OA involves degeneration and loss of articular (surface) cartilage in the joint, there has been a lot of excitement in the medical community surrounding PRP because of the potential that it can slow or possibly reverse this degenerative process.  Research showing its regenerative potential is still in the early stages, but there have been some very positive results so far and expectations remain very high for long term benefit from PRP injections for treating OA.

Besides the possible complications that can occur with any injection (see reverse), PRP has been shown to be very safe, and is not known to have any specific side effects because the injection involves your own body tissue.

Summary:  PRP is a new type of injection that is safe and effective in treating various sports injuries and osteoarthritis.  In addition, PRP may have a regenerative effect in building new cartilage and hopefully slowing the degenerative process of OA.

Dr. Trevor L. Hall, MD, CCFP, Dip. Sport Med.
Sports Medicine Physician
Cambridge, Kitchener-Downtown

Dr. Hall is a co-owner and sports medicine physician at GRSM. He is an assistant clinical professor with the DeGroote School of Medicine and Department of Family Medicine at McMaster University. Dr. Hall also serves as the sports medicine consultant for the University of Waterloo varsity clinic and is the team physician for the UW varsity hockey team.

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