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Platelet-Rich Plasma (PRP) Treatment

Platelet-rich plasma injection of the knee

What is Platelet-rich Plasma?

Although blood is mainly a liquid (called plasma), it also contains small solid components (red cells, white cells, and platelets.) The platelets are best known for their importance in clotting blood. However, platelets also contain hundreds of proteins called growth factors which are very important in the healing of injuries.

PRP is plasma with many more platelets than what is typically found in blood. The concentration of platelets — and, thereby, the concentration of growth factors — can be 5 to 10 times greater (or richer) than usual.

To develop a PRP preparation, blood must first be drawn from a patient. The platelets are separated from other blood cells and their concentration is increased during a process called centrifugation. Then the increased concentration of platelets is combined with the remaining blood.

How Does PRP Work?

Although it is not exactly clear how PRP works, laboratory studies have shown that the increased concentration of growth factors in PRP can potentially speed up the healing process.

To speed healing, the injury site is treated with the PRP preparation. This can be done in one of two ways:

  • PRP can be carefully injected into the injured area. For example, in Achilles tendonitis, a condition commonly seen in runners and tennis players, the heel cord can become swollen, inflamed, and painful. A mixture of PRP and local anesthetic can be injected directly into this inflamed tissue. Afterwards, the pain at the area of injection may actually increase for the first week or two, and it may be several weeks before the patient feels a beneficial effect.
  • PRP may also be used to improve healing after surgery for some injuries. For example, an athlete with a completely torn heel cord may require surgery to repair the tendon. Healing of the torn tendon can possibly be improved by treating the injured area with PRP during surgery. This is done by preparing the PRP in a special way that allows it to actually be stitched into torn tissues.

What Conditions are Treated with PRP?

  • GENERAL
     Cartilage defects, injuries
     Arthritis
     Ligament sprains
  • UPPER EXTREMITY
     Elbow tendinitis – golfer’s elbow, tennis elbow
     Rotator cuff tendinitis
     Rotator cuff tears
  • LOWER EXTREMITY
     Patellar tendonitis – jumper’s knee
     Plantar Fasciitis

Is It Effective?

Research studies are currently being conducted to evaluate the effectiveness of PRP treatment. At this time, the results of these studies are inconclusive because the effectiveness of PRP therapy can vary. Factors that can influence the effectiveness of PRP treatment include:

  • The area of the body being treated
  • The overall health of the patient
  • Whether the injury is acute (such as from a fall) or chronic (an injury developing over time)
  • Treatment with PRP could hold promise, however, current research studies to back up the claims in the media are lacking. Although PRP does appear to be effective in the treatment of chronic tendon injuries about the elbow, the medical community needs more scientific evidence before it can determine whether PRP therapy is truly effective in other conditions.
  • Even though the success of PRP therapy is still questionable, the risks associated with it are minimal: There may be increased pain at the injection site, but the incidence of other problems — infection, tissue damage, nerve injuries — appears to be no different from that associated with cortisone injections.
  • If you are considering treatment with PRP, be sure to check your eligibility with your health insurance carrier. Few insurance plans, including workers’ compensation plans, provide even partial reimbursement.

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