5-813.9:

Your knee joint capsule has been severed.

The knee joint connects the thigh to the lower leg. The knee joint is made up of 3 bones. These bones are the thighbone (femur), the shinbone (tibia) and the kneecap. The kneecap sits in a groove at the front of the thighbone. Joints are encased in a joint capsule. In the knee joint, certain parts of the joint capsule usually keep the kneecap centered at the front of the femur.

Parts of the joint capsule are severed to change the position of the kneecap, for example. You have had an arthroscopy to sever your joint capsule. An arthroscopy first involves making a small incision in the skin. A camera was pushed through this incision. This camera sends images of the inside of the joint to a screen. Instruments such as forceps and scissors can be inserted into the joint through other small incisions.