What is a Platelet Rich Plasma (PRP) injection?
This is a concentrated suspension of platelets in plasma derived from a patient’s own blood (autologous). A small volume of blood is taken from a patient and centrifuged. This splits the blood into several components including Red Blood Cells (RBCs), White Blood Cells (WBCs) and Plasma. The plasma is rich in platelets, depleted in white cells and packed full of growth factors. The growth factors are thought to stimulate chondrocytes (articular cartilage cells) to proliferate and possibly induce healing. This was approved for injection into the joint for osteoarthritic knees by NICE on 23 January 2019. PRP may also be injected into tendons for treating tendinopathies (degenerate and painful tendons).