Has anyone had an ultrasound guided blood injection as a treatment for a small partial tear of the patellar tendon (jumper's knee)? I've been trying to find out more about this but have had no luck. I had this injection a week ago, and will need a further treatment in a month's time. My knee is even more painful now, one week after the injection, than it was when I first injured it about five months ago. Also, it's a long complicated story but I'm having this treatment privately, I don't have medical insurance and it costs 345 pounds per treatment.