joint capsule n.
See articular capsule.
The missile lies in the joint capsule between the head of the tibia, in front of the spine, and the patellar notch of the femur.
There is noticeable distension of the joint capsule—a characteristic pendant pouching protrusion.
Like the tibia the hock is exposed to frequent injuries and in some cases wounds perforate the joint capsule.
Horses sometimes jump over wire fences and wounds are inflicted which constitute extensive laceration of the joint capsule.
If the pus perforates the joint capsule, there are signs of abscess or of diffuse suppuration in the cellular tissue.
Perhaps the most heroic consists in opening the joint capsule with a bistoury or with the actual cautery.
In runaways the joint capsule is sometimes punctured by sharp pieces of wood or other objects.
The next step in the operation is closure of the synovial sac or joint capsule.