They can be used for: Achilles tendons, elbow tendons (“tennis elbow” or “golfer’s elbow”), patellar (knee) tendons and hip tendons (often thought to be “hip bursitis”). 

The procedure involves taking some blood from a vein in your arm (similar to a blood test) and then injecting it directly into the abnormal part of the tendon, using an ultrasound scanner to ensure accurate placement.